Math

Dr Holly Krieger discusses Merterns’ Conjecture. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ More videos with Holly (playlist): http://bit.ly/HollyKrieger Dr Holly Krieger is the Corfield Lecturer at the University of Cambridge and a Fellow at Murray Edwards College: https://www.dpmms.cam.ac.uk/~hk439/ On Twitter: https://twitter.com/hollykrieger

This is a good practice geometry question. #math #maths #mathematics #shorts Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn

This delightful problem comes from a German math competition. What’s the perimeter of the triangle CDE? You have 3 minutes to solve this problem. Watch the video for a solution, and to see the shape-shifting triangle hidden in this problem. Sources https://puzzling.stackexchange.com/questions/56054/triangle-with-incircle http://www.mathe-kaenguru.de/wettbewerb/index.html Playlist to watch all videos on MindYourDecisions This is the only channel

You probably had to memorize the times table to 10 in school. What is the sum of all the products? Try solving it in 30 seconds! Then watch the video to see the solution presented in two methods. I came across this problem in Arthur Benjamin’s new book “The Magic of Math: Solving for x

What is the sum of all numbers in a times table? Full video: https://youtu.be/bjjmuOd1fdc Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon

I’m sorry the clip from the show has been blocked. For more on game theory in Breaking Bad, see my post: Game Theory in Breaking Bad If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions Connect on social media. I update each site when I have a new video or blog post,

This is a simple trick to divide any number by 5. #math #maths #mathematics #shorts Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an

Archimedes’s famous Cattle Problem had a truly epic solution. Featuring Alex Bellos. More links & stuff in full description below ↓↓↓ Alex Bellos: http://www.alexbellos.com More Alex videos on Numberphile: http://bit.ly/Bellos_Playlist So You Think You’ve Got Problems by Alex Bellos Amazon: https://amzn.to/2KR9Get Signed copies via MathsGear:http://bit.ly/BellosProblemsSigned More Alex books: https://amzn.to/2KQTc5Y The Cattle Problem by AH Bell:

Full video (sum of angles in star general case) Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn from qualifying

Professor Ron Graham discusses the famed Happy Ending Problem and Ramsey Theory. More Ron Graham Videos: http://bit.ly/Ron_Graham More links & stuff in full description below ↓↓↓ An extra little bit at: http://youtu.be/hnIBiIcuudU Graham’s Number: http://youtu.be/XTeJ64KD5cg Support us on Patreon: http://www.patreon.com/numberphile NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Numberphile is supported

I saw this fun problem online. Watch the video for an “outside the box” solution! Source https://www.instagram.com/p/BxOfZBVB2Mo/ How To Solve The Square’s Length With “Outside The Box” Thinking! Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address in video). I consider all ideas though can’t always reply! Why are some comments before the video is published?

Ancient Egyptians essentially used binary numbers to multiply. Just amazing. Credits https://en.wikipedia.org/wiki/Blackboard#/media/File:Teacher_at_blackboard_(1924).jpg Jeff Dahl, CC BY-SA 4.0, https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons https://en.wikipedia.org/wiki/Ancient_Egypt#/media/File:Pharaoh.svg References The Egyptian Method / Russian Peasant Multiplication (Video And A Proof) https://en.wikipedia.org/wiki/Rhind_Mathematical_Papyrus This method is documented in the Rind Mathematical Papyrus. The document is from ~1650 BC, which is more than 3,600

Featuring Professor Carlo Séquin – see more from him at: http://bit.ly/carlosequin More links & stuff in full description below ↓↓↓ More on this topic soon… Animation by Pete McPartlan: http://bit.ly/PeteMcPartlan Support us on Patreon: http://www.patreon.com/numberphile NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Numberphile is supported by the Mathematical Sciences Research

A simple procedure to add fractions of different denominators. Credits Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn from

Oxford ranks as one of the top universities in the world. Learn how to solve this coin flipping game, which is adapted from an actual interview question! The video presents two methods. Guru Me video – watch to learn a 3rd way to solve the problem Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address in

Versions of these three puzzles have gotten popular on social media with the tag that if you can solve them you are a genius. #puzzle #shorts NPR Will Shortz puzzle (If Eli is 173) http://www.npr.org/2017/06/04/531413242/sunday-puzzle-all-answers-have-alliterations-that-are-absolutely-necessary Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do

The ancient Egyptians used a division method we call “partial quotients.” It’s a quick an intuitive way to do division. How ancient Egyptians multiplied numbers An Incredibly Easy Way To Divide Numbers – Ancient Math Secret You Didn’t Learn In School The problem 30 divided by 2 1/2 is documented in the Rind Mathematical Papyrus,

Thanks to Braden for suggesting a similar problem! This is a fun Christmas themed emoji system of equations. Can you figure it out? Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be

Images from Calculus by James Stewart Inspired by https://www.tiktok.com/@whoisargenr/video/7090673992205487365 Skrillex and Diplo – “Where Are Ü Now” with Justin Bieber #shorts #math #maths #mathematics

Just a quick one from Brady after his return from Nepal. More links & stuff in full description below ↓↓↓ Boiling video: http://www.youtube.com/watch?v=JTL4dj3Gx1o More about the mystery couple: http://bit.ly/16XCs3G Nepal Flag: http://bit.ly/10G3Ef3 Everest 8848: http://bit.ly/11ilGvs More clips from Brady’s trip: http://bit.ly/12di1M8 NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by

The 32-sided truncated icosahedron forms the basis of many footballs (soccer balls!). It’s also a big deal in chemistry. More links & stuff in full description below ↓↓↓ sixtysymbols video on footballs: http://www.youtube.com/watch?v=55M1cq62m2c periodicvideos video on buckyballs: http://www.youtube.com/watch?v=ljF5QhD5hnI This video featured Dr James Grime at Nottingham Forest’s stadium, The City Ground. NUMBERPHILE Website: http://www.numberphile.com/ Numberphile

This is said to be one of the hardest ACT math questions. In the equation x^2+mx+n=0, m and n are integers. The only possible value for x is -3. What is the value of m? #math #maths #mathematics #shorts References https://onlyphysics.org/the-5-hardest-act-math-questions-ever/ https://www.quora.com/In-the-equation-x%C2%B2-mx-n-0-m-and-n-are-integers-The-only-possible-value-for-x-is-3-What-is-the-value-of-m https://brainly.in/question/16637042 Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many

What is 8÷2(2+2) = ? There’s a reason almost all calculators give the same answer. Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an

John H Conway on his love/hate relationship with his most “famous” invention. Conway playlist: http://bit.ly/ConwayNumberphile More on how he invented it at: http://youtu.be/R9Plq-D1gEk More links & stuff in full description below ↓↓↓ Support us on Patreon: http://www.patreon.com/numberphile NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Numberphile is supported by the Mathematical

According to legend, the secret to pizza’s name origin is mathematics. #Shorts Images https://commons.wikimedia.org/wiki/File:Pizza_Tikka.JPG#filelinks https://commons.wikimedia.org/wiki/File:Volume_of_a_pizza.svg Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you buy from the links below I may receive a commission for sales. (As an Amazon

What’s the area of a single triangle? Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn from qualifying purchases. This

This is an old one that makes the rounds from time to time. Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas! If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate

It’s not so simple to solve for this simple answer. Thanks to all patrons! Special thanks this month to: Richard Ohnemus, Michael Anvari, Shrihari Puranik, Kyle. WolframAlpha Get Real with Wolfram|Alpha—Computing Roots https://www.wolframalpha.com/input/?i=cuberoot(8%2B3*sqrt(21))%2Bcuberoot(8-3*sqrt(21)) https://www.wolframalpha.com/input/?i=(8%2B3*sqrt(21))%5E(1%2F3)%2B(8-3*sqrt(21))%5E(1%2F3) Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Playlist to watch all videos on MindYourDecisions: https://www.youtube.com/playlist?list=UUHnj59g7jezwTy5GeL8EA_g This is the only channel to feature math topics suggested by

What is 17 x 11? What about 15342 x 11? You can multiply numbers by 11 in your head with the trick shown in this video. If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions Connect on social media. I update each site when I have a new video or blog post,

Just for fun… Featuring Matt Parker. Some REAL knot action at: http://bit.ly/Knot-a-Phile More links & stuff in full description below ↓↓↓ More videos with Matt: http://bit.ly/standupmaths — And Matt’s book: http://bit.ly/Make_Do_Numberphile Support us on Patreon: http://www.patreon.com/numberphile NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Numberphile is supported by the Mathematical Sciences