Nancy answers your questions (NancyPi)

Published on August 16, 2018 by

Q&A with Nancy! Nancy, formerly of MathBFF, answers your questions on her new math channel, NancyPi.

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Editor: Miriam Nielsen of zentouro

Director: Kristopher Knight

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  • Ikam6 4 years ago

    This video reveals your trick 😉
    Thanks for the Q&A and thanks for the math tips

  • Akif Akpinar 4 years ago

    Uuu i like that magic
    Hair line on the right instead of left like in previous videos.
    Right handed, not left like in teaching videos.

    You have nice content on your channel. Thx for the teach 🙂

    • Elmas Yıldız 3 years ago

      Kalash55 👌🏼

  • Cole Blair 4 years ago

    She simply flips the video on the X-axis in the video editing. I am now a wizard.

  • J Will 4 years ago

    This was good. Also your editing was fun. And thanks for the math help.

  • Prince Primus 4 years ago

    You made math enjoyable thanks

  • Prince Primus 4 years ago

    You should change the name of your channel to:’I love Nancy’ because indeed you have a very likeable personality

  • Prince Primus 4 years ago

    I can tell you why can write backward l had a secretary who could have written backward. She was ambidextrous. But any left handed person can write backward

  • Lara Hossam 4 years ago

    you’re incredible

  • Saleh Aboutaama 4 years ago

    After finishing this video I have one important question, will you explain any math logic courses?
    like Discrete Math and those ones for CS students…?

  • Oni 4 years ago


  • Oni 4 years ago

    it’s okay to be nervous fam

  • Kevin Seven 4 years ago

    Thank you for providing me with education for all these years

  • sirmovielover 4 years ago

    I love watching your videos. You explain things very well. Could you do some Calculus III videos? Like vector projections & more.

  • Daniel Belmiro 4 years ago

    She uses a lot of her right hand in these videos, and in her math lessons, she uses her left hand. Think about it, and you will know her secret.

  • Seaprimate Jenkins 4 years ago

    Hmmm, I bet the trick to writing like she does is finding the inverse, then finding the inverse of the inverse. In other words, it’s highly probable that she’s right handed. lol

  • Richard Harrington 4 years ago

    Haha… tapping the nails on the phone.

  • Kaptain 1964 4 years ago

    Ok I guess Nancy does nor write backwards, she is obviously right handed, and is writing normally, then she mirror images the video left to right so it looks as if she is magically writing left handed backwards in real time!

  • Jon Richards 4 years ago

    Nancy ur a beauty

  • Adarsh Kr Jha 4 years ago

    Actually i know….you write with your right hand…and give the image ‘mirror effect’…or you laterally invert it!!

  • Ironman KMSA 4 years ago

    thank you so much for helping me not flunk!! I’ve learned a ton. Please keep going. You’re amazing!

  • s 4 years ago

    nancy you aren’t as robotic in this video… and your eyes aren’t as dilated

  • Ragnar Lothbrok 4 years ago

    Q and A top question…..Will you marry me?

  • johnlopez655 4 years ago


  • Kuberan Govender 4 years ago

    If is not post production, I think it is:…………….

    She writes on a glass, the camera records the in a mirror. So she really writes with her right hand… and because if lateral inversion in a mirror we see it as her left hand.

  • michaelf1900 4 years ago

    You are gorgeous, I have never seen your smile before, and I must say it is a most beautiful one

  • Ethan Stark 4 years ago

    Anyone else notice the bag that kept jumping in and out of shots in the bottom left?

  • Qudratol Wazir 4 years ago

    Miss you were chemistry

  • Steven Priest 4 years ago

    LOL. I was a “wizard” before you… granted, I was a lower tech and not nearly as photogenic wizard, with a small apartment and limited resources at the time. I have only 16 videos on my channel that I did during my return to UIC for ChemE degree.
    Keep up the good work!

  • JamieG321 4 years ago

    2:08 I appreciate the fact that you said “maths” and not math

  • Trib Triboulet 4 years ago

    Great channel.

  • A problem 6ix 4 years ago

    i love you i love you i love you i love you i loveyou

    • WolfangOPGaming 3 years ago


  • Kevin Owens 4 years ago

    I am so happy for you getting your own channel. I really would like to see you do more 3rd semester calculus problems (gradients, triple integrals etc) maybe differential equations. You really make this fun and enjoyable in so many ways. All the best!

  • BASEsick TRUTH 4 years ago

    Can you do more non-math videos?

    I’m not here for the math….

  • chaas seek 4 years ago

    I am here for maths only!!! no that is not true 😍

    • WolfangOPGaming 3 years ago

      i wish you never commented this

  • Shaunav Kaushik 4 years ago

    How are you so beautiful?

  • Soudamini panda 4 years ago

    Hay congratulations 100k

  • Steve T 4 years ago

    Another idea for a future talk video: career opportunities for math majors! What kinds of interesting work can math majors hope to find after graduation.

  • Joe Anthony 4 years ago

    I often used your MATHBFF videos a few years ago in my tutoring in algebra because they are so great. Now I’d to use them again. Are the old ones still available? Please say YES. Thanks, volunteer math tutor in San Diego

  • tc l 4 years ago

    U should start a asmr channel for real tho

  • Bojokowski 4 years ago

    I wanted to know was how she wrote backward so well.
    Also, how she so hot and smart?
    I love pasta too and don’t know how to end things

  • T W 4 years ago

    Bob Ross!! Cool. 🙂

  • T W 4 years ago

    I so appreciate your videos! It was nice seeing a bit of a personal type video. Your voice is very calming and I really appreciate you breaking down the steps…which is totally needed as I take my Calculus course!! Trying to solidify it in my head!!

  • A5KR4 4 years ago

    What do you work

  • James Mclaughlin 4 years ago

    Doesn’t hurt to be super hot.

  • ammar nezam 4 years ago

    I need to take lesson . Sure not free ?
    Please agree to give me lessons and I am ready to the cost for these lessons

  • Ryan McGowan 4 years ago

    -Pasta math. I don’t know what it is, but it could be something. Antipasti would be imaginary numbers, obviously.
    -Weird and unexpected results from math. Like the Game Show problem, infinites, Mandelbrot set, my high school report cards… etc.
    -Recite pi. In it’s entirety. Backwards from the end. (I would watch all of it)
    -The statistical probability that the end of the world is near, and that it’s because Kim Kardashian had a baby with Kanye. I’ve done the math, and I keep getting 99.999% to 9 standard deviations.
    -Make one video on day one. Two on day two. Four on day three. Eight on day four. Keep doubling each day, until I get bored. On day 64, play chess. It’s called the Chess challenge. I made it up.

  • Paring Hudas 4 years ago

    So beautiful and smart..

  • Shannon Ware 4 years ago

    Very funny, great presentation. Questions, ideas… since you are a computer science person as well as a math person, I am interested in learning more about and achieving fluency in the areas of math ther pertain to comp sci. Different bases are an example of a starting point. Or factoring because it relates to cryptography, etc. Pure math is great, I only discovered that late in life. I suppose many people are looking for practical solutions, and I think computers are a great place to discover how wonderful (necessary) math is. (I see a similar comment just below this one; I know I am not alone in this notion.)

  • Zeeshan Syed 4 years ago

    You have some really high quality content on your channel. Nicely done!

  • Jaswinder Singh 4 years ago

    What is ur nationalisty ??

  • xlovelyveex 4 years ago

    omg you’ve got such a good personality!!

  • Robert Foley 4 years ago

    Here’s a question for you–how would you like to be my next ex-wife?

    • OneManShow 3 years ago

      Probably the same answer as your last ex-wife.

  • jonard lopez 4 years ago

    here is mine. what type of workout do you do ?

  • Basil Zaidi 4 years ago

    You are the reason why I started liking calculus lol

  • Serat Bhuiyan 4 years ago

    1:05 How do you write backwards? She simply flips the video after she is done recording;and no she isn’t writing backwards!

  • Serat Bhuiyan 4 years ago

    MIT is expensive;how were you able to pay off the tuition fee,do you come from rich background?

  • Monique Whittingham 4 years ago

    lol… You have no idea what your videos has done for me. Ran from math all my life thinking i wouldnt need it.. Pssh! 🙁
    Magic X has changed my LIFE and a few friends that i imparted the knowledge to 😀 HAhaha

  • SS3MANIA 4 years ago

    Do you know you helped me finish calculus and loved it . I’ve finished Calculus 1,2,3 easy and it all started with you. Thank you Nancy!

    • Rob 3 years ago

      Thats what i hope for…have Calculus nxt semester

  • Gohar I Nayab 4 years ago

    You are the cutest math teacher in the world. It will be an honor to have you as a friend and off course keeping math apart even though I calculate a lot and teach Math the whole day.

  • Ashfaque Ahmed Tunio 4 years ago

    You write on glass and mirror your videos. That’s it.

  • Jim Schwartz 4 years ago

    How do you explain using determinants to solve systems of equations?

  • RTarson 4 years ago

    She mirror the video to write backwards.

  • MrBat000 4 years ago

    very cute!!

    • WolfangOPGaming 3 years ago


  • S L 4 years ago

    Alot of cherry picked non questions.

  • Truman Hicks 4 years ago

    Could you do a video on consecutive integers, please?

  • Reggie87 4 years ago

    Does this girl have the total package, beauty and brains?

  • Nathan Smalley 4 years ago

    For the first question, I think there is a projection of what she is about to write, so she just traces what is projected. Add a bit of cleverness and you’ll have some fooled viewers!

  • TG373 -M85 4 years ago

    Thank the lord for this woman, massive help

  • phokeybladewar 4 years ago

    I enjoyed this video way more than i would

  • Nadir Al-Harthi 4 years ago

    Nancy u said you have passion for computer science then make a video for coding.

  • DASHING GAMER 4 years ago

    Super Cute😋

    • WolfangOPGaming 3 years ago

      you’re probably a fat kid that can’t any girls shut up

  • Mr.K. 4 years ago

    Nancy, math and computer science teacher here 🙂 Can you do a video on Boolean Algebra?

  • AJ02 4 years ago

    I think she flips the video so the writing is the correct way round

    • NOSHERWAN 4 years ago


  • Private Factory 4 years ago

    How she writes backwards, well thats easy. Everything that you write on a posterior side of the transparent surface on camera will look in reverse, the only way to correct that is to mirror-flip the image in post production, which by the way creates another interesting effect that proves the above. In this Q&A vid she is holding her mobile phone is her right hand, its safe to say that she is right-handed, but in all her math videos she is holding a marker-pen is her left hand, this effect is caused by the “mirror-flip”.

  • M.Sammi ur Rehman 4 years ago

    Can you teach more subjects like physics,biology or chemistry?

  • Big TREV 4 years ago

    West coast is the best coast NANCY

  • M.Sammi ur Rehman 4 years ago

    Is there is your another account

  • Jean Bosco Mucaca 4 years ago

    How can u solve f(x)=5÷2x_4

  • Daniel Breen 4 years ago

    Thanks for all you do! You’re channel’s been a great resource for me through Pre-Calc and Calc 1. I hope you feel awesome about that.

  • Brenda Luis 4 years ago

    a bit of a silly question here, how do you write backwards so well?? are you a wizard?

    • The FanBase 4 years ago

      she mirrors the video, she writes on a glass.

  • Noah 4 years ago

    YES CAN U EXPLAIN WHY ANY NUMBER TO THE ZEROITH POWER IS 1. Also maybe the traveling salesmen problem if you have time lol

    • Matthew Zaldaña 4 years ago

      If you see that
      4!= 24

      You divide by 4 to get:
      3!= 6
      You divide by 3 to get:
      2! = 2
      You divide by 2 to get:
      1! = 1
      You divide by 1 to get:
      0! =1
      Just one way.

  • KANDJOU VETUAKOUUA 4 years ago

    this is really interesting.. you hve answered a lot of my questions Nancy. super cul

  • Ubi Bhatt 4 years ago

    *Nancy people are not loyal to you, or to your teaching skills (they are good though), people are here to see your face.*

  • TheBandScanner 4 years ago

    Strange but nice. Personally I would like to see a session just devoted to the use of symbols. When I was a kid each year at school was like a barrage of snowballs thrown at you. How helpful it would have been to have been given an overview from the start; a kind of “heads up.”

  • Kris Kollar 4 years ago


  • LifeIsShowtime 4 years ago

    I remembered watching your former channel because you teach better than my profs to learn maths when I was still a freshman 😂

  • Adam Chavez 4 years ago

    Did you say that you are into computer science? Will you make some videos on that please?!

  • King Umar 4 years ago

    Can you solve the square root of pi to the power of negative infinity, I’ve already solved it, I just wanted to know if you can do it.

    • Noor Nedal 4 years ago

      Math Lovers pro level questions zero

    • King Umar 4 years ago

      @Noor Nedal correct

  • Daniel Duran 4 years ago

    You are a genius – and a beautiful personality! Keep up with the good work on math videos – I always learn a lot!

  • ShadowCabalist 4 years ago

    My sister was naturally left handed but in the time and place that we grew up in, it was not acceptable. She was taken out of her class and trained to be righted. The procedure somehow granted her the ability to write inverse or reverse or the combination of the two. No one ever borrowed her class notes from lectures more than once. Did you experience something like this or is it just a left handed thing?

  • Dante Francisco Domingo Carlos Andres Sebastian 4 years ago

    Great video 🙂

  • PREETI TALREJA 4 years ago

    Make videos on sector area

  • light ryuzaki 4 years ago

    Are you single?….

  • Allen Alea 4 years ago

    shes so hot tho

  • Coltyn Stone-Lamontagne 4 years ago

    Holds phone in right hand… writes with left hand… vid must be flipped 😂… however which one is flipped? This vid or all of the tutorials!?

  • Rohit Paluru 4 years ago

    Thank you very much, I just passed because of you

  • chaitanya kapoor 4 years ago

    can you do a video on how to take antilog ? would be useful for physics problems

  • Robert Bercovitz 4 years ago


  • Caye Zara 4 years ago

    Oh, Nancy you are gorgeous.

  • Magreth Mununga 4 years ago

    Hey Nancy how do we calculate regression and correlation?

  • HS 99 4 years ago

    Are you married? Do you have kids? Would you marry me?

  • Danilo Montalvo 4 years ago

    I’ll be your friend in the east coast and who doesn’t love Pasta plus I appreciate all the times you have help me with math watching your videos lol

  • Mariano 4 years ago

    I’m Not Letting You Go This Time

  • KingsKid 4 years ago

    HOW CAN I PROVE MATHMATICALLY THAT ab>a+b for all a and b

  • MaliceWonderland88 4 years ago

    I’m so happy you are back! Thank’s for all the help!

  • Rakan KF 4 years ago


    • Wang Xunan 4 years ago

      Rakan KF lol she just writes normally and flips her video along the y-axis

  • TheFarmanimalfriend 4 years ago

    Teach a man to fish and he’ll sit in a boat all day and drink beer.

  • Shreshth Sharma 4 years ago

    IIT exams are a way much very very difficult than getting into mit , sundar pichai is a student of iit

  • alex dacosta 4 years ago

    Im from the east coast and make some great pasta:)

  • Denmar Chambers 4 years ago

    tbhhhhh i really just came for the teacher

    • WolfangOPGaming 3 years ago

      wtf is wrong with you no one asked

  • Robert Vincent 4 years ago

    I share your math instruction with many students and parents.

  • Master Zhao 4 years ago

    Computer Science? Please do some programming videos! Especially ones with Linux

  • Ashley Cameron 4 years ago

    Hi Nancy, How do stay mathematically motivated, and what inspires you to do it ?

  • marco sena 4 years ago

    I will Explain everything about how my girl write in this way…..The way of the people thinking is not right…My girl does not write in a mirror way ….. In her most videos We saw that she write with her lift hand but in the video of (Nancy answers your Questions) you will find that she welcomes us with her right hand not with her lift one as in the most of her videos….The way is she writes with her right hand in a glass then she mirrored the video itself…..My girl is not a super girl… She is a smart one♥
    Love you♥

  • marco sena 4 years ago

    So, In this video I observed that you are right-handed not lift-handed like other videos… you mirrored the video itself…..I love you, Genius girl…..Thank you, video♥

    • Kishore Subramani 4 years ago

      She uses to write on glass which is placed in front of the camera

  • Kishore Subramani 4 years ago

    #teach set theory,Relations and function please nancy 🤗

  • B Plail 4 years ago

    She writes on glass then mirrors the video

    • Lola Moon 4 years ago

      Yup lol

  • Cian Gargan 4 years ago

    I’m guessing how she writes backwards is that she doesn’t. She writes normally and flips it to a mirror image when they’re editing.

  • Taj Mahal Badalandabad 4 years ago

    I Like You 😍

    • WolfangOPGaming 3 years ago

      i hate you

  • Kishore Subramani 4 years ago

    Nancy when is your birthday ?

  • Kishore Subramani 4 years ago

    Nancy what do you do other than making math videos for YT i mean your profession ?

  • Kishore Subramani 4 years ago

    #teach vector algebra please

  • AT3 4 years ago

    How can somebody soo beautiful be soo smart. You got it all gurl.

  • Saint Christopher 4 years ago

    NancyMagic videos btw.what about more basics for middle /high school

  • Saint Christopher 4 years ago

    special favourcan you prove 1/n diverges n ->infinity(you gather terms and prove that the groups are greater than another div. series )Ta!Chris

  • Christopher Mclennan 4 years ago

    Is it possible to write the formula for the area of a circle as a combination of identities, do an algebraic rewrite to get a function of two variables diameter and circumference then use integration to get back to the area formula? I was thinking maybe chain rule or quotient rule I don’t know but I thought it was an interesting problem I wanted to get a mathematicians perspective the math tutors at my school won’t answer this question.

  • Christopher Mclennan 4 years ago

    What I meant was how does one go about deriving the formula for the area of a circle by using integration? My mistake was, starting with the area of a circle formula and solving with integration discretely instead of using the standard equation of a circle and working through the problem that way.

  • Faizal Z 4 years ago

    Nancy love ur nerdy jokes. Thanks for ur uploads. Entertaining AF.

  • Faizal Z 4 years ago

    I was wondering if you can show how to apply calculus in real life? I know its really powerful and awesome, but i just cant wrap my head around how they choose what function for what. Does my question make any sense?

  • Elisha Gunasekara 4 years ago

    I think she is using a mirror to write backwards (the video in mirror is being recorded as opposed to the board).

  • Juan Labuschagne 4 years ago

    Please explain some general proofs like Mean value Theorem

  • toreontrack 4 years ago

    What did you study at MIT? (I guess you say majors(?) in the states)

  • toreontrack 4 years ago

    If not only living off youtube, what other job do you have?

  • toreontrack 4 years ago

    If you can’t figure out how she “writes backward” by yourselves then you should probably stop wasting your time watching maths videos.

  • TALHA ABDULLAH 4 years ago

    yeah Nancy I have a question how does one get passionate about math

  • ChairilChairil Anwar Esa 4 years ago

    This isn’t a math related question but do you cook or eat outside?

  • slyowusu99 4 years ago

    Hello Nancy. Hello all. Help. I want to start/return to maths as a hobby – say spend about 1.5 hrs a day for the next few years. The aim is to self teach and practice and improve my knowledge from basic maths knowledge to post graduate level maths. So therefore 2 questions. 1. Is this possible with determination. And. 2. What order of maths methods would you recommend I follow that would form a natural progression? Say algebra to derivatives to … etc. Thanks

  • Mike Zappara 4 years ago

    I came for the math… I stayed for the mutual love of pasta 🍝

  • reda abakhti 4 years ago

    I m also watching this for asmr

  • Willy Gómez 4 years ago

    I just discovered your channel and haven’t yet watched most of your videos, but you kind of strike me as the type of person that’s naturally good at explaining science to the general public. I think you should consider doing videos where you explain the surprising applications of math in the real world (if you’ve seen Hanna Fry’s videos/talks, you know what I mean)

  • Mohammad Kandakji 4 years ago

    What happened to mathbff channel?

  • Jacob Jordan 4 years ago

    Where abouts are you from?

  • MathORTIZ 4 years ago

    2:40. I did my friends homework, I just charged them. Math killed them in college but hey I got the extra practice and got paid. HA!

    • l0n3w01f 4 years ago

      in my college days, I was taking my calculus final and my friend was across from me. I finished the test pretty fast. My friend looked at me with that “i have no idea how to do any of these problems help me” so when the teacher walked out he passed me he’s test and I did it for him. I didn’t care, we where engineering majors, I figured he would just drop out later (he did).

  • lord leoo 4 years ago

    How does she write backwards?

    she has a transparent glass in front of her. she writes on it normally. the camera is behind the glass board. the camera sees the writing from behind. if you see the original video directly recorded from the camera, the writing would be mirrored, the writing would go from right to left. after she records everything, she takes it to a computer, and a software mirrors the video. so the image you see of her now in the video, is not what you’d see if she was in front of you in real life. but this is a mirrored image of her. notice in the other videos that she’s writing with her left hand in the video. in reality, she’s just right handed. in the other videos, her hair style, the splitting line in her hair is on the left. usually when people are standing in front of you in real life, the hair line split is on your right side (left side of the person with the hair). in this Q&A video her hair split line is on the right side. the videos are obviously edited, cuz she does that “fast forward” effect, and there are some cuts in the video. i’m amazed how people keep asking the same question.

  • Tis'ur"Master'" 4 years ago

    I can do everything except for translation English to algebra. I hate english.

  • Tis'ur"Master'" 4 years ago

    she’s not really writing backward.

  • Tis'ur"Master'" 4 years ago

    I don’t understand why 1+1 is 2 instead of 11.

  • Skeptoptimist 4 years ago

    To get the writing right, just create a video mirror image of the writing (sorry for giving away the “secret” lol) One doesn’t notice Nancy being a mirror image (apart that she is not left handed), but makes a pleasant difference to the writing. (notice that Nancy is right handed on this video, but left handed when writing on the glass screen)

  • Aerie Kah 4 years ago

    Hello NancyPi, I love your videos! I actually took a lot of math classes in college and am not watching for homework help – but because I am a nerd …. and it is relaxing watching someone do math. Lol. It is a way to kinda remember it after college and learn new tricks I didn’t know before.

    I would love if you did differential equations, partial differential equations, differential geometry, etc. The higher, even more fun math. <3 Those are the most interesting classes. I know less people are wanting to watch those compared to those people wanting trig and basic calc help "just to get through school" but I would love to watch higher math if you ever had time to make those videos as well!

    Also - you casually mentioned your interest in math and comp sci - what did you actually get a formal degree in? What level degree did you get? I wanted to go to MIT back in the day but couldn't afford it. PROPS Girl! 🙂 Keep up the great videos.

  • Nate Private 4 years ago

    My heart started to beat again, Thank you!

  • Matthew Harrison 4 years ago

    Just wanted to say that your work is really easy to understand,thankyou for that,i even figured out how you write backwards. Anyways,my question would be: Would you ever go into more detail for each year for students?

  • Joe Blainey 4 years ago

    you look so hot

    • WolfangOPGaming 3 years ago

      fuk u

  • Kieren Van Der Haar 4 years ago

    Any chance you could get to do math lecture on twitch…

  • Kieren Van Der Haar 4 years ago

    And can u teach us metrices please

  • WarriorPride65 4 years ago

    Do you have a boyfriend?

    • WolfangOPGaming 3 years ago

      stfu what if i asked that question

  • Red Angry Bird 4 years ago

    I eat pasta for breakfast, lunch and dinner !!! 😲

  • Farshid Ashouri 4 years ago

    I wanted to learn math. Now I don’t. All guys here know why.

  • Farshid Ashouri 4 years ago

    It’s obvious, the picture is mirrored. Look at her hair line.

  • Jaman87 ultra 4 years ago

    Dear Nancy- I have struggled with math at times through my life. A good teacher can make a world of difference to a student beyond the subject. My math tutor set me on the road to a better future, and I am grateful for him every day.

  • sanjeev thakur 4 years ago

    If you want to know how she writes backwards.She writes forward and after the video she flips it

  • sanjeev thakur 4 years ago

    And I am a nerd so uhh…u ain’t puttin me to sleep

  • WolfReaper 4 years ago

    Can you make videos about Boundary problems if you haven’t done so already? Distinct Real Roots. Equal Real Roots. Complex Conjugate Roots. Thanks! You’re incredible at explaining math. I tell everyone about your videos.

  • Roxette Rojas 4 years ago

    Hello, Nancy! I am an incoming freshman in college, pursuing engineering. Ever since I was in middle school up to high school, I was already the “mathematician” or like the “math wizard” of the whole class. You just made me like math more.

    I really appreciate all your videos, especially those of calculus 💖 really needed it. Can you make a video that has, like umm practice problems or applications of limits, derivatives and integrals? And then a solution after a few moments? It would really be of great help. If not, it’s fine. I still idolize and salute you! 💕

  • Paul 4 years ago

    You could be an actress or model you’re so smart and beautiful. Awesome teacher ☺️

  • Jaydon NTI 4 years ago

    She just changes the camera to make the words from back

  • John navneeth Raj 4 years ago

    Just when I am about point out your backward writing on another of your videos, here you are having a QnA and first question Boom ! 😄

  • Patrick Welch 4 years ago

    I am a dirty old man.

  • JP Backflip 4 years ago

    After watching so many of your videos, I watched this and for some reason you looked slightly different to me, I couldn’t quite put my finger on it. Then i realized it’s because all your regular math videos are mirrored… so this is the first time i saw the true you, so to speak 😀

  • Bardiya Bej 4 years ago

    Hey, Nancy can you please teach GCSE and A-level maths on your channel. Please help student who either taking GCSE or A-level maths exams, if you live in the UK

  • Charlie Hand 4 years ago

    Hint about Nancy writing backwards: She’s right-handed.

    • Sherzod Nurullayev 3 years ago

      @Mr Gardner’s Primary Education Video is actually sequence of images. So, they record a video and perform “horizontal image flipping” on every single image 🙂

    • Mr Gardner's Primary Education 3 years ago

      Sherzod Nurullayev so no glass is involved?

    • Sherzod Nurullayev 3 years ago

      @Mr Gardner’s Primary Education There is both. First she wrote on glass, and then they used “horizontal image flipping” 🙂

    • KRISH CLASSROOM 3 years ago

      It’s a lightboard and she is flipping the video during editing

    • motu moht 3 years ago

      Common guys no need for hints it’s called a lighthouse studio.she is not the only one doing it

  • Petrus Prinsloo 4 years ago

    I love in South Africa, so a bit far away. Also, I do like pasta, no you can’t have any.

  • Christian Holmstedt 4 years ago

    Hint about Nancy writing backwards: Check where her hair divides in this video compared to the regular ones.

  • waheeb yasin 4 years ago

    I can teach how she rights backwards.

  • Lang Jan 4 years ago

    hey guys, can someone please tell me what happen to the old videos, i took a math class back in 2015 and i remember Nancy had more content on the Math Bff channel, but now i cant find them. i am just wondering what happen

  • MHQJ 4 years ago

    In Soviet Russia Math Do You

  • Hani Shah 4 years ago

    Are you single? I am also a mathematician.

    • WolfangOPGaming 3 years ago

      shut up

  • Deepak Kumar 4 years ago

    I am in love 😙😍 with this teacher 😘😘😘

    • Ambrish Dubey 4 years ago

      Samaj Gaya q itna love aaraha hai 😉😏😏😏

    • WolfangOPGaming 3 years ago


  • alomuniz 4 years ago

    Professora linda demais.

  • Drey Galon 4 years ago


  • Ambrish Dubey 4 years ago

    Why u speak so nervously???

    • your dad 4 years ago

      She read Comments ✔️

  • Akeem Louigarde 4 years ago

    Do you get paid to do math videos on youtube?

  • Kamran Ishaq 4 years ago

    Nancy you are so beautiful and adorable

    • WolfangOPGaming 3 years ago

      u weird as fuk

  • Kamran Ishaq 4 years ago

    I like chatting with you

  • dray etsaw 4 years ago

    You guys should be a little more respectful AND show her your support through her Patreon link!!!

  • Paulo R Menezes 4 years ago

    How do not fall in love with this girl? Nancy, your classes are delicious to wacth, even for those not addicted in math. I think that is delicious listen to you talking about anything.

  • Shaunak Baradkar 4 years ago

    Or she uses mirror !

  • Mario Rossi 4 years ago

    You speak Spanish ? . If yes, you could put a channel in Spanish?

  • Ailurophile 4 years ago

    What happened to MathBFF?

  • PunkyP 4 years ago

    Try an IIT paper lol…

  • DebbieWad3 4 years ago

    I’m attracted to you……….

    Alright have a good day, ttyl

  • Hasif Maricar 4 years ago

    Mama! I love nerds

  • LORIE ANNE CRUZ 4 years ago

    HI Nancy can you do a video about abstract algebra?. About mapping I really want to learn it but I don`t understand some of the topic.

  • companymen42 4 years ago

    College is hard. So glad I graduated before I burned out.

  • Mejhul 4 years ago

    Pretty, sweet and smart, you are the perfect woman.

    • WolfangOPGaming 3 years ago


  • hasnain khan hassu 4 years ago

    You are so sexy

    • WolfangOPGaming 3 years ago

      stop just stop

  • ANIS patel 4 years ago

    How you writing like thiss

  • gOtze1337 4 years ago

    answer to question one, are nancy´s videos mirrored 🤔

  • Hugo Friberg 4 years ago

    How to magically write backwards: Draw on a tablet, reverse, mask and add as a new layer on top of your footage

  • Noah Kurz 4 years ago

    I have a multiplying polynomials Common Core Algebra 1 question for you. How do I write (x+3)(x-2)(x-8) in polynomial standard form?

  • Joe Fresch 4 years ago

    Pasta will have to be shared… but yes…

  • HALE BURNSIDE MD 4 years ago

    i love pasta…..have you tried Michael’s of Brooklyn spaghetti sauce??? my favorite ,,,, and the part of yore hair is on the wrong side….why is it on one side when you are writing backwards….but on the other side when you are not ???? i am so so so disappointed that you are not really left handed

  • Zachi Evenor 4 years ago

    As a calculus lecturer, I find many of my students had problem to work out the limits of f(x)=1/x (in x=0+, x=0-, x=+infty etc) using the epsilon-delta definition. Could you make a video about it so I will have an on-line tutorial to refer them to?

  • J J 4 years ago

    Thanks Teacher ❤

    • WolfangOPGaming 3 years ago

      take of the heart emoji off now

  • STA JLR PR 4 years ago

    Now writing in reverse is not a secret, you are just using a mirrored version of your video, because you are a right handed and the videos show a left handed image, nevertheless, you are doing great, I like your lectures a lot.

  • fmj 556 4 years ago

    You don’t wright backwards you use camera tricks.

  • aFreeman0409 4 years ago

    I must apologize in advance for finding you completely transcendental.

  • Ltbo 67 4 years ago

    hard work pays off congrats. math and pasta are awesome!

  • teddysurf 4 years ago

    Here’s a hint to how she writes backwards, look which side she parts her hair in the Q&A vs her normal videos…

  • Shadow Lhex lll 4 years ago

    I love your videos maam. Im a filipino math teacher. And i learned more from your video.. I hope i would see you. 😊

  • Pranita Madhale 4 years ago

    Ur real Beautiful

  • Pouriya zeydi 4 years ago

    “linear control systems” can you teach us please

  • James Lindgaard 4 years ago

    With your speech, you have a soft voice. Since I have a hearing loss, I decrease the treble while increasing the bass. 🙂

  • Aryan Singh 4 years ago

    I like your talking methods.

  • Jojje 3000 4 years ago

    Partial derivatives, please. And get yourself an account on Patreon, so that we can support your work.

  • Eye Knight 4 years ago

    She manages to write backwards by mirroring the image after recording 🙂

  • Jrod Gallardo 4 years ago

    Im here for math asmr

  • THE UNKNOWN 320 4 years ago

    How could she write in 0 gravity or on air? Wooooh….Wich

  • Balaporte Jean 4 years ago


  • Diego R 4 years ago

    Answer to the first question: She writes normal and when the video is shot everything is backwards, Nancy is also on the right side of the screen. The. The video gets edited and a mirror or invert effect is applied. Very simple.

  • THE UNKNOWN 320 4 years ago

    Nancy pi: hey viewers,,u don’t need to like math
    Viewers: so?
    Nancy pi: just like me..and watch 😀
    (Like if u agree) (thnx Nancy for helping us)

  • Raul D´Empaire 4 years ago

    Please Discrete Math,

  • GulamMustafa Kazi 4 years ago

    But I know Nancy , you are actually righty . . In your videos you are actually mirroring 😉

  • Arghya Sarkar 4 years ago

    Please make video on counting of triangle (reasoning)

  • Animal Welfare 4 years ago

    The technology is a lightboard. You can find out information about how lightboards work (and how to build your own) here: @t. The technology used in the MIT Lightboard interactively flips the image and adds auxiliary images and video inputs into the captured video in real time, so that the instructor can immediately review the footage.

  • Yenis Pereira 4 years ago

    do math games or math-offs if that makes sense.

  • Nick S 4 years ago

    I don’t want to steal you writing bit, BUT I DO want that gradual speeding up and slowing down effect, with the tape winding sound! Is that Classified as well? Oh and thanks for all the math and junk 😉 Your lessons are on point, GG!

  • Math King!!! ! 4 years ago

    Lol…I love you nancy!you’re pretty beautiful….

    • WolfangOPGaming 3 years ago

      would you say i love you to your math teacher??

  • Dano JC 3 years ago

    What do you call a pretty girl on MIT campus…..lost!
    don’t actually mean that.
    Eileen Perez writes backwards also.

  • Robert Bruce 3 years ago

    Well that was wonderful. I wished that I had worked my blank off to. So what was the motivation to work so hard in high school?

  • Mist R 3 years ago

    next Q&A: what’s you zodiac sign?

  • Sky Post 3 years ago

    The beautiful girl I have ever seen.Can we be friends?

  • Salvatore Amico 3 years ago

    I know How you don’t write backwards. LOL

  • Triveda nellutla 3 years ago

    you should honestly just start a yt channel aside from math idk your choice haha

    btw loved the vid!

  • Nikos Giannakopoulos 3 years ago

    about writing backwards…….In videos where you don’t use the transparent board, your hair partition is on the right side. In the videos that you use the transparent board your hair partition is on the left side.
    So I think that you use a mirror for your tutorials right?

  • Louis Carliner 3 years ago

    The truth is that you are not writing backwards, and that you are right handed. Clever technological trickery is used. Behind you is a white painted wall or plain backlight panel, using non-glossy flat paint. In front of you is a clear glass panel that works functionally like a white board. What the video cameras will see the writing in total reverse. There is a switch option either on the camera itself or on the video switcher board to mirror reverse the image. Such a reverse switch is useful for photography studios to allow the talent to preview him/herself, but for convenience in appearance touch up the mirror switch option is used before recording.

  • 00 7 3 years ago

    Would u do a video on LACA please? (linear algebra and complex analysis)

  • Parham Fathi.Hafshejani 3 years ago

    Hello ma’am.
    I have a question about the graph. I need to know how many ways exist to calculate “total Depth” and and “mean depth in a graph. ( I need to know that because as I know there are many ways to calculate Integration ( an Important filed of SpaceSytnax, a theory which is based on the theory of graph). we have different integration such as Integration Telk- P-value – HH (Hellier and Hansen) and…
    I need to know how we can calculate them
    another filed that we calculate in SpaceSyntax is choice.
    how we can calculate choice? ( thank god we have only one kind choice )

  • Sam Pitts 3 years ago

    So the truth 😂 comes your a natural born nerd some of us must work at it.😎🤔

  • Anthony Madia 3 years ago

    You write normal on the glass board, but you flip it on the camera

  • Ali Tahrei Sh. 3 years ago

    @fireant G She writes on a glass and then flips (mirror) the video!

  • Greg Davidson 3 years ago

    What is the difference between a Rieman and Lebesque integral?

  • استاذ حبيب هميم 3 years ago

    Hi can I ask u?from where plz

  • Oshan chamika 3 years ago

    hi nancy your are the my , pet, beauty queen😍 real teacher
    im currently undergraduate
    this 10th i have my 1st ca test of my basic mathematics course wish me !😘

  • Kyle Wijayatilleke 3 years ago

    *she does not write backwards, she uses a mirror effect to be able to see it!*
    You can tell at 3:40 when she writes with her right hand, on videos she writes with her left hand!

  • Gillian Taganas 3 years ago

    Can you do a video on sigma notation? I wish I found your videos sooner!!

  • Musica 3 years ago

    she writes normally and it shows in the video as backwards and then she just flips the video 0:36

    • Lil Lea 3 years ago

      Yup, you can see she’s right handed in this video and the others ‘left handed’ very cool style though, definitely unique

  • Melissa Kramer 3 years ago

    Holy shit you flip the videos dont u & that’s how u write backwards so well!!!

  • Matt ONeill 3 years ago

    I didn’t see a video for oblique asymtotes

  • Ravindra Sahu 3 years ago

    Hey Nancy Pi! I recently started watching your maths video. Could you please provide some intuition on convolution, Laplace transform? Lots of Love from India!

  • Tyler Hall 3 years ago

    she doesn’t write backwards she’s not a lefty. she just flips the image

  • lushin burl 3 years ago

    You totally need to start doing asmr too. Its awesome. Asmr puts ypu to sleep if u want if not it just feels cool to listen.

  • lushin burl 3 years ago

    You r so beautiful’ smart’ and funny. You could do anything you wanted.

  • Ervin Siruno 3 years ago

    Hi! Do you have or can you make videos on Combination and Permutation??

  • Anay Rodriguez 3 years ago

    shes not writing backwords i think she flips it while editing

  • Infidel 3 years ago

    Give someone a fish, and he’ll eat it that day.
    Teach them how to catch a fish, and they’ll never go hungry.

    • bruh 3 years ago


  • Reynaldo Limbaga Vlog 3 years ago

    Miss Nancy, can I ask you something about Mathematics?

  • Kyle Starr 3 years ago

    Can you do a video on Vectors please?!

  • YuukiRbrn LeClavier 3 years ago

    I live on the east coast (i.e. probably near you, if you still live within daily commuting distance of MIT) but you can’t have my pasta :0. Rather, I’ll buy you your own : )

  • pedro barnito 3 years ago

    0:36 about write backwards, just wanna give people a clue. 😉 Nancy use the right hand here , but in the videos she use left hand, ( if you people have just a little IQ you can find out how she can do it ) sorry Nancy , but nice trick

  • MRO 3 years ago

    was that Mathbff a contract channel, I mean some kinda contract to make videos for them. Or it was your own channel and you just changed it’s name?

  • HARESH RATHOD 3 years ago

    I know how you write…….
    Mirror effect by camera recording…… although you write on transparent glass…..
    Guys if you check this effect see video in normal mirror…….

  • Triskaideka thirteen 3 years ago

    Do you work on Statistics?

  • Earthlights Music 3 years ago

    It’s all about math until math has plump lips and high cheekbones. Your voice is nicer than Veronica’s was, but she needed to be heard in a huge class room, and so I learned Trig. Richard, the visionary, said he didn’t think of trig and log functions as curves, but as the series that were expanded to evaluate them — a big help in finding their derivatives! I’ve subscribed so I can have a living reference to dust off my math skills. If you’ll come across the Basin some nice weekend I’ll give you a sailing lesson!

    • WolfangOPGaming 3 years ago

      your weird

  • Jim Miller 3 years ago

    Make videos about the history of math. Like how and why Isaac Newton invented the Calculus.

  • Chief Louie 3 years ago

    Yes, yes, yes.

  • gore buster 3 years ago


  • shahid Raza 3 years ago

    Hi nancy ma’am i am from india….am your student…you ‘re best.teacher.😘

  • Huell Babineaux 3 years ago

    Answer to question 1: She doesn’t write backwards.. She writes on the board like one normally would, but the video is mirrored and therefore appears the correct way to viewers.

  • Nicolas Zhang 3 years ago

    Just come here to say thank you!!!
    I’ve been watching your videos since high school. I struggled quite a bit back then, high school calculus and algebra was killing me. But glad I found your channel, your videos were super helpful! Now I just got 169 in qualitative section for GRE last week. I think of all the math courses I have to take from high school to college, you are definitely the greatest math instructor I had!

  • Alvaro Cambuy 3 years ago

    Passando pra agradecer pelo ótimo trabalho!!! Seu canal é o melhor. Parabéns Nancy.

  • stickman Joe 3 years ago

    The REAL question is: Do you have a boyfriend?

    • ZombieSlayer22 3 years ago


    • Vsk 3 years ago

      @Holly CT lol right

    • ThvtSyDneYlyf3th0 3 years ago

      @FrenkyB hahahahahaaa!!! the odds are stacked

    • Lixon Darvish 3 years ago


    • Carla Muralles 3 years ago

      FrenkyB Yes me

  • Motivation Master 3 years ago

    she is not weiting backwards… she is actually writing with her right hand, the video is flipped horizontally🙂

  • Alex Minsky 3 years ago

    ASMR starts at 4:08! You’re welcome.

  • Moe Crosby 3 years ago

    Thank you for being so clear in speech and thought! I found you because I need to brush-up on my math. My 9-yr old daughter is very good with math and we constantly do skills that are far beyond 4th grade. We are just now starting quadratic expressions. I like that I can show her videos of a young woman doing math!

  • ali brk alk 3 years ago

    will you marridin me nancy .ı love you

  • Meme Cuisine 3 years ago

    Why are you so beautiful

  • David Walsh 3 years ago

    Is there any chronological order to you lessons?
    I passed Trig in high school, but I don’t know how.
    I would be interested in actually learning it.

  • 大王叫我不要来巡山 3 years ago


  • History of games 3 years ago

    You are so beautiful ❤️❤️😘… Your smile just beautiful

  • Justine Talens 3 years ago

    supposed to be studying for my calculus exam tomorrow but here i am watching your Q&A

  • Julie Carcamo 3 years ago

    Please make a video on Long with cube roots and fractions in it. Also, what do you do for a living? Hoe Old are you? I also live in the east coast:)

  • Mjd Ilast 3 years ago

    Nancy we need more geometry videos like transformations, Area and some word problems.

  • Bob harson 3 years ago

    Thank you i like your method dear

  • carldon pusey 3 years ago

    Clear neat awesome…. you’re making me a genius thanks…

  • Eli- Tech 3 years ago


  • Chris Christi 3 years ago

    Wow , I’ve been looking all over the interwebs for you !!!!! I fired up a Math BFF vid and said to myself : ” This is NOT Nancy …. I’m sure this Nancy (sorta’) look alike is a very nice person ; but ….. NOT Nancy !! “

  • amir 3 years ago

    Your voice is amazing Nancy, can you do some asmr for brakes?

  • Odiggidydog 3 years ago

    Hey NancyPi, I love your videos. Could you remove your Q&A from your homepage? It plays every time I go to your page and was done a year ago. Your teaching style is perfect for me, please keep posting!

  • Matthew Francis 3 years ago

    1:41 Wait say it again but more slowly…

    Oops wrong joke

    • WolfangOPGaming 3 years ago

  • Tariq 3 years ago

    would you introduce, how to create or generate an algorithms, like 101 type of thing, thank you really

  • Justin Nelson 3 years ago

    A lot of you have never talked to a girl before and it shows

    • Nikola Tesla and Elon Musk 3 years ago

      @Isaac Iraheta watch Elon musk’s next mission rather than wasting time by watching this sexy smart bade

    • Nikola Tesla and Elon Musk 3 years ago

      @MidName watch Elon musk’s next mission rather than wasting time by watching this sexy smart bade

    • Nikola Tesla and Elon Musk 3 years ago

      @Vsk watch Elon musk’s next mission rather than wasting time by watching this sexy smart bade

    • Nikola Tesla and Elon Musk 3 years ago

      @JL 350 watch Elon musk’s next mission rather than wasting time by watching this sexy smart bade

    • Vsk 3 years ago

      @Nikola Tesla and Elon Musk at least she smart

  • Advanced physics concepts and problem solutions 3 years ago

    I always more or less understand the formula or theory of math chapter. But while solving problems I can’t solve some problems and it’s frustrating.
    Any advices on that ? Because I’m not sure if for that I need to solve different types of problems more?
    Gimme some idea.

  • ash2 AffClass 3 years ago

    I’ve watched many good instruction videos on subjects, but you have a profound quality for relating intimidating subject material very well. You inspire….
    Thanks for the help.

  • SIDDHARTH SAXENA 3 years ago

    The only way maths can be interesting..

    • WolfangOPGaming 3 years ago


  • Owais Khan 3 years ago

    reverse trick

  • Joseph Esparza 3 years ago

    Appreciate the math help (I mean all of us do) but would you like to do calc work that’d be really great tbh and you should vlog for sum reason idk like a non math :”’))) I’d Sub fs

  • Mario Lopez 3 years ago

    Omg nancy! I found you! I loved your videos, they helped me so much 😊

  • Michael Cueva 3 years ago

    Wait if you also took computer science you can also code. Would love to see you make a video about programming tutorials ☺

  • Muzzammil Hussain 3 years ago

    Mam are you mit Grad

  • Chance 3 years ago


  • mohammad ashraful 3 years ago

    I want to your friend

  • Amiah Julia 3 years ago

    Can you do another Q & A?!?

  • boxinabox 3 years ago

    Teach us some Matlab or other IT tools

  • R4ng3 r0ck 3 years ago

    1:41 man that was hot hahaha

    • WolfangOPGaming 3 years ago

      stfu there are other websites for hornyness

  • Tahmid Khan 3 years ago

    Your professionalism is respectable. Instead of making tiktok videos or showing off on IG, you’re helping idiots like me. Keep up the good work

  • Mr. Waqar Iqbal 3 years ago

    Hello. I have a question. How to integrate ln(sinx). Prounounced as natural log of sine x.

  • Fagun Shah 3 years ago

    If y’all are wondering how she writes backwards it’s just a mirror effect on the entire frame. You can tell because her hair is opposite in this video as compared to her other math videos

  • Dont Mansion 3 years ago

    she doesn’t write backward, the video mirrored

  • Math Idiot 3 years ago

    hi nancy gosh ur so beautiful and your voice is so demure Iloveyou 😉

  • Umer Mehtab 3 years ago

    I love love love love love love love you please marry me

  • Bob Tripp 3 years ago

    Ms. Pi 🙂 Thank you for all your videos. The way you express your self is so logically clear, always, you make math beautiful 🙂

  • Utkarsh Pathak 3 years ago

    She writes on mirror

  • Chukwuemeka Okafor 3 years ago

    For the writing skills
    What she is actually doing is writing in front of a big glass and then have the camera record from the front of the glass. After the record she then uses software to mirror the video looking as if she is writing backward

    • Josef Stalin 3 years ago

      chukwuemeka okafor This makes actual sense, and is smart as heck too

  • Sabbir Dewan 3 years ago

    Guys her secret of writing backwards is: mirroring the video in post

  • Jake Ramos 3 years ago

    How did you get the nick name NancyPi?? Very clever…

  • Majster Prosty 3 years ago

    Have you ever thought of Goldbach’s hypothesis as the sides of a triangle divided into two parts?

  • Anders Eriksson 3 years ago

    Totally one of my favourite math channels. Good job and thanks Nancy. You haven’t posted in a while but you have lots of useful videos up already! I used your videos as I was doing a bunch of upgrading. Now its calculus and Fourier haha.HAPPY NEW YEAR

  • gone with the wind 3 years ago

    Who else cringed when she told it was magic writing backward?

  • Anthony Cortez 3 years ago

    Nancy is the most beautiful Mathematician I’ve ever known 🥰

  • Guillermo Alfonso Morales 3 years ago

    First question easy answer: you are righty, everyone can see in the way you use your phone and write in the air, in the videos you are lefty, video edition “turn video horizontal”.

  • A Foi Production 3 years ago

    conclusion: you can blame bullshit if you don’t get into your college

  • Priyanshu SAGAR 3 years ago

    Can you teach physics i must me veiwing

  • Priyanshu SAGAR 3 years ago

    And live streams

  • FlexedKnotSea 3 years ago

    Girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl girl

    • WolfangOPGaming 3 years ago

      dummy!!!!, your probably a 12 year old

  • Richard Richardson 3 years ago

    she actually seem cool in person – the math personality is meh – but its nice to have personality. but its also very cool how intelligent she is – i mean that’s undoubtedly one of the best qualities a person can have esp when applied to educating others too. shes pretty awesome

  • Muneeb Shayk 3 years ago

    please teach me,,us more deaply about solving differential Eq.
    like :

  • Sarita Agrawal 3 years ago

    Thanks mam i get help from your videos

  • Frank Romero 3 years ago

    Writing backwards is easy, you need to know the secrets of editing. 🙂 The same question would be, are you left-handed?

    • Frank Romero 3 years ago

      @kiran rao Thanks Sri for that.

    • kiran rao 3 years ago

      Ok frank..🙄🙄😁😀

  • matemáticas para todos 3 years ago

    Eres un bon bon.

  • Sherzod Nurullayev 3 years ago

    Answer for the 1st question: She is using “Horizontal image flipping”

  • reubyn mcnaught 3 years ago

    She probally just looks into a mirror behind the camera, that would do it right

  • Damon Barber 3 years ago

    Have you always lived in MA or did you move from out of state to goto MIT? Or did you attend via remote location? Thanks.

    • Damon Barber 3 years ago

      Could you make a trig video (adding and multiplying vectors)? And could you do a multi part video on translating algebraic formulas? More Calc videos would be awesome too.

  • Don Moore 3 years ago

    I can write backwards, but not as fast as you. I think there is some trickery involved in what you do.

  • Faisal Nazir 3 years ago

    You are high profile teacher.where country u belongs mam

  • TheMerryPup 3 years ago

    Hey Nancy, you’re due for another Q&A! So I’d like to know, in addition to teaching here, how do you use those awesome maff skills professionally? Thanks!

    • Yash Pal Goyal 3 years ago

      yeah, i was wondering exactly that.

  • Dan C 3 years ago

    Doing God’s work! Thanks for all your help. I’m using your videos to help me with my business level math class. I was in the military for many years and am doing school again and had many doubts about picking up a calculator again, but these videos really help me. I’m currently on derivatives and you explain things 10x better than my more than annoyed math professor. I ask him fairly obvious questions and he always tells me, “you should have learned it already” and he doesn’t understand and seems to treat me like I’m just another 19 year old who plays on his phone in class. I actually really want to get through school to get my Information Systems degree, but professors aren’t always sympathetic or helpful to people who aren’t very quick studies. Thanks for explaining the small things and catering to us dumb people!

  • Umita Devnath 3 years ago

    😍 your maths videos from India

    • WolfangOPGaming 3 years ago

      you probably l like her for her looks weirdo

  • Bernard Forrest de Belidor 3 years ago

    A ten years old kid asking her “do we can be friends?” Then this young teacher say yes, we can be friends. The reactions of the kid and his friends is YESS!! WE DID IT!!

  • Rafał Wróbel 3 years ago

    Q: Why don’t you put link to your patreon on your older videos description box, and your website? I stumbled on your channel because I was looking for a good explanation of chain rule and youtube suggested me your video from 2018,and by the near end of it I was so pleased that I started to look for it, I took me a while before I have finally found it here. If it is about time then maybe you could delegate it to someone or write a python script that would do it for you? 😉

  • Brian C 3 years ago

    Here is the math question:
    How do you prove the equation : Sample standard deviation = s = sqrt [ Σ ( xi – x )2 / ( n – 1 ) ] ?
    Why isn’t it divided by n, instead of (n-1) ?

  • Kriti Kumari 3 years ago

    I am a boy of 11 years but then also why am I watching it at 1:00 at night..

  • Mr Hassan Shehata 3 years ago

    You R very honey

  • AnonymousAsh 3 years ago

    Question one’s answer is obvious, she flips the video lol

  • Muaaz Khan 3 years ago


  • Lucas Royston 3 years ago

    dawg you got some weird ass mfs in your comments watch out man

  • N /A 3 years ago

    When you realise that she uses ‘mirror ‘ editing..😑

    • Fajitahmed 3 years ago

      She obviously doesn’t edit her own video

  • Ben Welsh 3 years ago

    brain: i’m here for math ben. focus.
    also brain: i guess i could “learn” a bit more

  • Cris S. 3 years ago

    continuities please!

  • Veronika Vařáková 3 years ago

    uh oh another parasocial relationship

  • Ailene Tenges 3 years ago

    Who’s ur bf?

  • seanparsa4 3 years ago

    Q&A is kinda hot

  • Christian Caldwell 3 years ago

    You write forwards and mirror the footage so it appears forward to us.

  • Bulent Guvenel 3 years ago

    Maths or your passions? Which one is more important for you?

  • ع ا 3 years ago

    How can I learn calculous ?
    Do I read a book ?
    Which book do I read ?

  • XONE911 3 years ago

    God, you are so sweet. Thanks for helping me through the math exam 🙂

  • Squash Head 3 years ago

    Marija Kero also writes backwards. You both are amazing.

  • أستاذ مرتضى صبيح 3 years ago


  • Nima Nabavi 3 years ago

    Hi, you very amazing. and very nice and cuteeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee.

  • tariq jan 3 years ago

    My dear math teacher I wans to meet you… How’s that possible????

  • ScoutofTF2 3 years ago

    Who is watching this in 2020 ?

  • Bouchlaqem Mohamed 3 years ago

    Ma soeur nancy
    Pour quoi on a choisie le cercle 360 degre?

  • fawad khan 3 years ago

    Uh have became a good teacher in mathematics

  • I wanna make 1,000 Apps so I can have many babies 3 years ago

    The “trick” is: She writes normally on the glass and then, on the edition tool, she/the editor flips the video horizontally.

  • blitzblutz 3 years ago

    Nancy must have been the most popular girl at MIT…
    but she was surrounded by guys that had no idea how to please her.

  • Richard Daratony 3 years ago

    Just smile and talk

  • Prajyot Patil 3 years ago

    I have some problems in differential equations
    How can I send u pics of those problems?

  • A B 3 years ago

    Dream girl for sure.

  • JPOTS 3 years ago

    0:37 All she does is write normal and then when she edits the video she just uses the flip tool to flip the video so everything on the left side is on the right and everything on the right side is on the left

  • صقر عبدالحليم محمد عبدالله ١٩٢٠٠٥٢٠ 3 years ago

    Teacher Nancy : Tell me the easiest way to learn Math and how did you learned it . Thx 💙

  • صقر عبدالحليم محمد عبدالله ١٩٢٠٠٥٢٠ 3 years ago

    ‘Cause I really trying for understanding math’s lessons so I will be happy and will be so great if you thinking to help me 😥

  • صقر عبدالحليم محمد عبدالله ١٩٢٠٠٥٢٠ 3 years ago

    If you read my massage please give me your resend back in neariest time 💙 …. Your student SAQR

  • Amarmend Amaka 3 years ago

    ohhh my crush <3

  • Penny the Boston 3 years ago

    I know the answer to the first question, and she’s really smart

  • Sk R 3 years ago

    1:41 I love that🔞

  • Geoffrey Woodyear 3 years ago

    Obviously you have a large mirror in front of the glass you write on, apart from the fact that beauty and brains being a lethal combination…well at least distracting.

  • Joseph O'Donovan 3 years ago

    she writes normally but the editor just flips the video

  • A R 3 years ago

    “Super passionate about maths”, I feel you Sister. We are of the same tribe.

  • imjusttoaks 3 years ago

    0:35 I actually beated the riddle, she doesn’t even write backwards, what she does is that she write normally on the transparent board, making the words come out mirrored from their original form (mirrored to the camera aka what we see and normal to her) then she mirrors the entire video with an editing software. I. AM. A. GENIUS. PLACE ME NEXT TO NEWTON.

  • Annkit Sarkar 3 years ago

    I think you donot write Backwards. It’s your camera which just invert your writing to make it correct. You are using Selfi mode. May be .

  • Meenu sinha 3 years ago

    what is the meaning of Nancy

  • NIIK 3 years ago

    She writes on glass, then mirrors it. 😜 Linear Algebra taught me that. 😂

    • NIIK 3 years ago

      Sri Raj Nancy was the first, that I’ve seen, to do this. Blew my mind. 😂

    • kiran rao 3 years ago

      there is nothing secret involved in it check out the following link for reference: link 1:
      link 2 :
      link 3 :

    • kiran rao 3 years ago
  • Abdalla Elharty 3 years ago

    Nancy is playing with fire . She thinks we are fools to think she is writing backwards. Shame on u nancy

  • tony paul 3 years ago

    Why’s it been sooo long since your Last video…. I miss your explanations.

  • Ali Jaber 3 years ago

    She doesn’t write backwards, the video is only flipped horizontally

    • kiran rao 3 years ago


    • Ali Jaber 3 years ago

      @kiran rao what do you mean

    • kiran rao 3 years ago

      @Ali Jaberits nothing ali jaber. i just wanna tell people the secret(magic) behind her left hand writing is “light board technology”.. thats it nothing serious.
      have a nice day😁😁😊

  • Prajyot Patil 3 years ago

    Plz make videos on multiple integrals

  • rpj1231 3 years ago

    Brains beauty with braces…

  • ANUBHAV BHARDWAJ 3 years ago

    You are a perfect example of beauty with brain ..😍

  • Taeyang Oh 3 years ago

    She probably doesn’t write backwards… it’s called mirroring your videos.

  • ammar al-housan 3 years ago

    you are very beatyfull girl as well as talented

  • fartax airgear 3 years ago

    llegue por accidente, no se todavia ingles, pero debo decir que esta chica es la mas preciosa que he visto a la hora de explicar matemáticas, espero siga haciendo contenido y se animen a aprender.

  • arklanbk 3 years ago

    the part in her hair is on the wrong side !!!!!

  • Luis Jaime 3 years ago

    I’ve a sad story. I used to watch Nancy’s videos for my calculus classes when I studied computer science. Then I changed my career to accounting, then I was suspended from school because I was lazy. A year later, I came back to college on summer 2019, but it wasn’t until today when I’m taking a class about calculus applications in business that I heard again from her.

  • Lissette Cutler 3 years ago

    Please make more math videos! Like simplex method linear programming problems. I’m really stuck with it.

  • TheDerpyCornDog 3 years ago

    You remind me a lot of Aubrey Plaza

  • Black Splasher 3 years ago

    This women is very chill, beautiful and intelligent. And apart from being a good math teacher she is a wife materiel for sure.

  • leredsock 3 years ago

    Nancy, how did you go about attending math lectures? Did you just sit and listen, or did you take notes? I get so lost when my lecturer talks, and then I end up youtubing everything. Just wondering if there was a way to optimize how I studied maths.

  • Syed Faisal Ali 3 years ago

    Great 🙂

  • Rohith Pramod 3 years ago

    I know how she writes backwards. She actually writes correctly but she flips the video so that all the letters would be correct for the viewers, if you know what I mean.

  • guadalupe aguilera 3 years ago

    Nacy, you can write what you want, you are the magician and thas all greetins from Mexico

    • kiran rao 3 years ago

      , certainly there is no secret for her writing. she was completely right handed there is technology called ” LIGHT BOARD TEACHING” GOOGLE the word now itself ..” LIGHT BOARD TEACHING”…..there is nothing secret involved in it check out the following link for reference: link 1:
      link 2 :
      link 3 :

  • mario marquez 3 years ago

    So how is life going for you

  • abdul rafay 3 years ago

    Nancy how you write and it comes exactly clear

  • Abdirazak .A 3 years ago

    love miss your explanation plz could do more about linear algebra …highly appreciate

  • maw kuri 3 years ago

    what? nobody ask a question if she’s married or have a boyfriend?😂😂😂

  • Shravana Karthikeyan 3 years ago

    I love how quirky you are

  • Albin Joseph George 3 years ago

    You flip your videos, thats how you write backwards:) I just noticed your hairline change ONLY for this video:)

  • Davut Selami ÖZKAHRAMAN 3 years ago

    Most beautiful and funny math teacher

  • Harsh Bandodkar 3 years ago

    You are a great math teacher

  • natureboy 3 years ago

    3:06 “u give a man a vaghina he will schpich for a day, u teach a man how to use his hand as a vaghina he will schpich for a lifetime” – admiral general aladeen of wadiyah

  • steven lodge 3 years ago

    You’re not left-handed. The First Q&A

  • Rp birt 3 years ago

    l like you very much

  • Pointer 3 years ago

    @ 2:43, why? LOL!

  • matar mbe 3 years ago

    I you give my mother a fish, today you eat fried fish, tomorrow fish soup and the day after fish croquettes.

  • Prahlad Meena 3 years ago

    You ar so cute mam

  • Jeffrey Carman 3 years ago

    Look me up jef a carma

  • Lawson Santoro 3 years ago

    Asmr please. That would be amazing!

  • Pahanin 3 years ago

    I got to MIT at 16 years old, but found it boring and moved on

  • Product Dezign 3 years ago

    Humans are 60% water. No one drools after water do they?

  • Product Dezign 3 years ago

    Euler wrote 800 pages of research per day equiv to 76 volumes of work.

  • Alex temp 3 years ago

    what happens to the bag on the left all the time… in, out, in, out…

  • Yash Sana 3 years ago

    She can write backwards because of the camera flipping the video. You can tell by her hairline and her dominant hand motions.

  • Otiakin 3 years ago

    Your channel is amazing for a selftaught, chaotic type of guy like me. Thank you.

  • Dean White 3 years ago

    Just now watching this. Do it again!!!! You seem smart enough to see through me and recognize the difference between a real person and someone trying to get a date. Do you ever wish you could find someone to talk to?

  • Daniel Teye Huago 3 years ago


  • Jolly Jokress 3 years ago

    What’s your IQ?

  • avi budha 3 years ago

    Are You vegan?

    question for you – int- e^-x^2 dx or the gaussion integral

  • Nishant Dev 3 years ago

    I dont like maths but *I LIKE YOU*

  • Adroit Plays 3 years ago

    U would have to be stupid to not know how she writes ‘backwards’

  • Suleyman Alpaltun 3 years ago

    Selam chat iş your name best speeak oryli

  • Suleyman Alpaltun 3 years ago


  • Peter Pan 3 years ago

    When she said “I busted my ass” I thought it was pretty hot

  • russellnc 3 years ago

    too bad I did not have a teacher like you, might of made it through thermo…

  • Gary Page 3 years ago

    What is your “daytime job”?

  • ThePinoyMamba 3 years ago

    Hi Nancy! I love Mathematics and I love solving and analyzing problems. I am currently taking Computer Sciemce. I dont love it the way I love Mathematics. Could you give me some tips on how it can be more interesting? Thank you!

  • Pietro De Nicola 3 years ago

    Yes! I do love pasta and I’m good at cooking – they say. But unfortunately I don’t live on the East Coast : D
    I kind of agree with the ASMR
    hypothesis. But that doesn’t discount that you are actually great at explaining math. Thank you for your videos.

  • jackie yengkhom 3 years ago

    I’m new to be in your chanal. Love your math teaching style. Thank you

  • Fernando Dones 3 years ago

    Question: can you do lectures on the mathematics of Wavelets Transforms ending with using Nurbs to develop a Wavelet?

  • laukesh thakur 3 years ago

    Nice your all lecture
    I watch I’m Indian

  • Guy Mercier 3 years ago

    Question… Show us your best pasta recipy : )

  • walterjab 3 years ago

    @NancyPi Math problem ideas: Maybe you could do some interesting and useful math in terms of bitcoin and blockchain. As a developer am interested in blockchain, but developers aren’t mathematicians, cause too much work for just one person, so I can’t do myself 😉

  • Louis Carliner 3 years ago

    The secret of you writing backward is that you are not! The set background is the pure white wall, in front of you and facing away from the white wall is a clear plexiglass glass or genuine glass wall that is readily erase able, and you are right handed. Everything becomes viewable by electronic right to left transformation!

  • Kelli Anderson 3 years ago

    I do appreciate your math tutorials. They have helped me immensely.

  • Jcee 3 years ago

    Why do I feel like she’s gonna start talking about a math equation.

  • Babies4Breakfast 3 years ago

    0:50 she writes normally then mirrors the video

  • Adrift Fishing 3 years ago

    love your vids Nancy. Dont know why i clicked but it was still entertaining 😉 thanks to your vids i managed to understand u sub! lol keep it up. your my first stop for anything math!!

  • Eshen Dias 3 years ago

    you are right-handed and write normal, but u have flipped the whole video 🤗

  • Learn with Deepika 3 years ago

    Hi Nancy. I love your videos very much. I also make videos on maths. I am learning a lot from you

  • rgftown1 3 years ago

    Hi Nancy!!! 😍😍

  • Seth Ellis 3 years ago

    Nancy, were you the first to write “backwards” like a wizard? It’s a great idea. “Anyone can fish! It’s 2018.” Yes! Preach! And now it’s 2020 and COVID and your content is even more relevant. I link your videos often for my students since flipped classrooms works really well right now. I hope you get many likes and subs from my students. Thanks so much Nancy.

  • Shaurya raj 3 years ago

    Are you in MIT ???

  • asadullah afghan 3 years ago

    Nancy you’re so beautiful
    with a good Explanation

  • Caye Zara 3 years ago

    You look gorgeous, hot and beautiful.

  • Arnav Jaydev 3 years ago

    She looks different….. now that we arent looking at her mirrored🤣😅

  • Marco Ramonet 3 years ago

    Would you marry me?

  • Francisco de Assis 3 years ago


  • manuel ramirez 3 years ago

    shes hot

  • Dadan Ramdani 3 years ago

    she doesn,t write backward, the trick is she writes on a glass normaly but then she puts the video mirroredly, she is pretty anyway

  • Alexandre Vitoria 3 years ago

    Thank you for your work. You are brilliant.

  • James Lindgaard 3 years ago

    Every math question I wondered about was answered when you started twirling your hair. Seriously, it has nothing to do with math but about everything to do with you. You’re awesome!!!

  • Named 3 years ago

    I broke up with my girlfriend when I realized what I had really been looking for….Maths

    Maths = Nancy + Me

  • Camillus Ogbuagu 3 years ago

    do you solve gr 8 math help

  • Ahmed Ayman 3 years ago

    So you are specializied in computer science now? LOL AMAZING i must take your number hehehe

  • Edwin Ortez 3 years ago

    Yeah, let’s be friends!!! I live in the eastern US coast and yes I love pasta and of course pizza. I was probably in the top 5 or 3 smartest kids for Alg 1, but then a stem test came and destroy my spirit (I was not so good at science neither at writing back then). But, well now I am just another student who loves math and also likes to get involved in many activities at school.

  • Kevin Cantrell 3 years ago

    I just realized…you are probably recording these videos writing with your right hand and writing forwards…then flipping the video in post production so that the text is not backwards to the viewer. Very clever. This would make you right handed, not left handed. I’m going to say this is confirmed as you air paint with your right hand in this video.

  • Rao Arif 3 years ago

    nice madam

  • Yash Pal Goyal 3 years ago

    OT: content suggestion: Discrete mathematics

  • Yash Pal Goyal 3 years ago

    4:28 the mic is nice… i didnt hope that hair sound would be audible
    5:09 that’s nice answer
    5:58 i dont know why i am laughing, a combination of relatability and sleep (ps: sleep is due to late night, not due to the voice)

  • Louis 3 years ago

    I live in the east coast, I love pasta, but I hate math. Can we still be friends?

  • Lixon Darvish 3 years ago

    I freaking love your shyness..

  • LucaS Migliori 3 years ago

    you are such a exquisite creature all you need to do is just talk so if the math does not get people your soft sexy voice certainly will.

  • Name Every Number 3 years ago

    Can you talk more at length about your math journey? Love your videos, Nancy!

  • vicky roy 3 years ago

    heyyyyy nancy !!!!! where do you live?? you are so sweet,cute and great mathematician…..

  • Indiegirl007 3 years ago

    Why does a math tutor have 1.3k comments….

  • Sarthak Sutane 3 years ago

    you just flip the video no magic trick

  • Richard Grimm 3 years ago

    My math abilities are almost nowhere! Do you think it’s possible for someone like me to turn that around?

  • Jacob Mach Ayuen Malok 3 years ago

    l like math……..and may it be possible to help me when i have some problems in math which are not there in your video channel?

  • John Gutin 3 years ago

    Are you a math teacher professionally, and if not, why not? You have a natural gift.

  • Yuzhen Wang 3 years ago

    Hi It’s Nancy… Hi Math Goddess, Hello from inside the great firewall

  • G K 3 years ago

    i can do backwards righting too heheeh

  • Great Leader 3 years ago

    You are a very beautiful and intelligent women. If you would be my wife, I would treat you like the Queen of the world. ♥️

  • Abdullah Jawid 3 years ago

    Where are you from nice teacher

  • Gnomed Mother-Fucker 3 years ago


  • Charles Abernathy 3 years ago

    Thanks, Nancy.

  • Nicholas Gyadu-Asiedu 3 years ago

    Please do a video on series convergence

  • Leena Tembhekar 3 years ago

    GIVE ME A ❤️
    I don’t know why it came to recommendation!🤔

  • Leslie Cruz 3 years ago

    Hi, Nancy. What type of markers do you use ? Dont seem to be regular whiteboard markers.

  • Zorro Dumdum 3 years ago

    Hi Nancy! How i wish that your youtube channel existed when i was taking my math subjects during my college days… life would be easier 🥰

  • Ricardo Pereira 3 years ago

    Why the dislikes!?

  • chuka d 3 years ago

    Mam Hindi m video

  • mrroye 3 years ago

    Your videos are one of four I use to differentiate instruction with my students for alg I & II .
    rob bob, khan and Patrick jmt are the others. . I try others but my students say they did not like them.

  • Wade Deadpool 3 years ago

    i highly recommend you to solve jee advance 2019 maths paper plz solve you will have fun

    • Nikola Tesla and Elon Musk 3 years ago

      @Ayush Gautam 3299 yeah right I agreed but majority of the Indians nowadays hate maths they only do maths for Marks and blame goes to education system and society

    • Wade Deadpool 3 years ago

      @Nikola Tesla and Elon Musk who told you

    • Wade Deadpool 3 years ago

      @Nikola Tesla and Elon Musk I love math and all my friends love math you cannot judge a country by the the society that you live in .

    • Ayush Gautam 3299 3 years ago

      @Nikola Tesla and Elon Musk first of all I didn’t say her either u to do anything!! Don’t drag me in! But yeah some people here in India love maths and some don’t !!but majority don’t love to do maths !Being one of them!😂😂

    • Ayush Gautam 3299 3 years ago

      @Nikola Tesla and Elon Musk but I think that’s only true in the young generations!

  • Sreepriya P Sajith 3 years ago

    You are awesome!!!!!!!!!😊

  • house of business studies 3 years ago

    Please explain modulus function

  • la la 3 years ago

    I’d like to request more videos on the study methods you used while at MIT. How many hours did you study per day and how to manage time/productivity tips?

  • Carlos B. Sánchez M. 3 years ago

    XD I know how you do it. I think I’ll copy your technique XD

  • TABO BANDA 3 years ago

    😂 😂 😂

  • Beautiful Angels 3 years ago

    Sexy, beautiful, and very intelligent.

    • Nikola Tesla and Elon Musk 3 years ago

      watch Elon musk’s next mission rather than wasting time by watching this sexy smart bade

  • Work Mail 3 years ago

    Q1. She just mirrors the video while processing.

  • Othman Alsaadi 3 years ago

    I love you so much, more than math!!! you are so nice + nice= beautiful. wish you + hope you = the best life and I do not know but you are a great person + nice look= funny

Comments are closed.