Math

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,

The slide method of multiplication is a groovy way to multiply numbers 😉 #shorts Song credits Song: Electric Boogie Artist: Marcia Griffiths A longer video: https://youtu.be/iZG25uBwU7M Article https://towardsdatascience.com/four-multiplication-methods-you-might-not-have-learned-in-school-fac2211a24b7 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!

A card trick which involves some little fibs. More links & stuff in full description below ↓↓↓ Extra footage at: https://youtu.be/cw63McIDWj8 ‘Mathemagician’ Colm Mulcahy is Professor of Mathematics at Spelman College. Colm: http://cardcolm.org More cards and suffering videos: http://bit.ly/Cards_Shuffling 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:

Here’s a creative way to send warm wishes, perfect for Valentine’s Day, or for that time you just called to say I love you. Based on a widely circulated graphic Song credits Song: I Will Always Love You Artist: Whitney Houston https://youtu.be/3JWTaaS7LdU

The secret to pizza’s name origin is mathematics, or so the legend goes… #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

The imaginary number i is equal to the square root of negative 1. But if you raise i to the power of i, you get a very real number, equal to about one fifth. This is just amazing! #Shorts Song credits Song: I’m Real (Murder Remix) Artist: Jennifer Lopez · Ja Rule Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send

What’s the best way to subtract numbers? The answer: any way that works. Here are 4 methods that can help you tackle subtraction problems easily. 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, so

Yes, it’s a cat video on YouTube. More videos with Tadashi Tokieda at: http://bit.ly/tadashi_vids Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile

People often choose the dealer in poker by “dealing to the first ace.” Is this a mathematically fair system? It is not! The video illustrates how the system favors early people being dealt cards. Calculating the theoretical expected values: http://mindyourdecisions.com/blog/2010/10/26/choosing-the-dealer-in-poker-is-dealing-to-the-first-ace-a-fair-system/ If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions Connect on social

There doesn’t seem to be enough information to solve this, but the answer works out magically. Thanks to all patrons! Special thanks this month to: Richard Ohnemus, Michael Anvari, Shrihari Puranik, Kyle. I also credit patrons Pradeep Sekar and Nestor Abad for finding a typo in my original video–thanks! Maths By Amiya : Perpendicular Chords

This is a fun little geometry problem. Thanks to Divyesh for the suggestion! 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

The Putnam Exam has legendary difficulty: the average (median) score is usually 1 out of a possible 120 points. No calculators allowed though, and you have to prove everything very carefully. This geometry problem appeared on one of the tests, and there is a neat way to solve it! Thanks to all patrons! Special thanks

The 17th annual Brazilian Olympiad featured an incredibly tricky logic puzzle that went viral on social media. Thanks to Guilherme who suggested and translated the problem from Portuguese to English! Pinocchio problem discussions https://ultimosegundo-ig-com-br.translate.goog/brasil/2022-06-08/questao-obmep-pinoquio-viraliza-personagem-mentiu.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp Students make memes involving Pinocchio and leak reactions A question about Pinocchio. What is your opinion about alternative C? by inaskphilosophy

Tadashi’s back (for the final video in this mini series) demonstrating the Kendama and some angular momentum. More links & stuff in full description below ↓↓↓ Tadashi Tokieda will be back on Numberphile soon. Here’s a playlist of his videos: http://bit.ly/tadashi_vids Kendama also known as bilboquet or boliche or bolero. Video by Brady Haran and

This is a fun algebra problem. Can you figure it out? Thanks to Aslah from India for the suggestion! 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

Asha and Lata are two sisters with mathematically interesting ages. If you write Lata’s age after Asha’s, you get a 4 digit perfect square. Amazingly the same thing happens if you repeat the exercise in 11 years. How old are Asha and Lata currently? 0:00 Problem 1:09 Difference of squares 2:25 Solution Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send

Three squares are formed on the three sides of an equilateral triangle. Each square has a side length equal to 1. What is the radius of the circle that circumscribes the squares? Thanks to Royce for the suggestion! This comes from the 2021 Colin Doyle Mathematics Competition in Australia. Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by

If you’ve been watching, you should be able to solve this one! Solutions on the web https://artofproblemsolving.com/wiki/index.php/1984_AIME_Problems/Problem_3 https://web2.0calc.com/questions/another-one-of-my-triangle-questions http://jwilson.coe.uga.edu/MATH7200/ProblemSet4.3.htmlSubscribe: 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! Like many YouTubers I use popular software to prepare my videos. You can search for animation software tutorials on

Previous video sets this up: https://youtu.be/-ruC5A9EzzE Extra on concatenation: https://youtu.be/LgnoYsbI7Uc More links & stuff in full description below ↓↓↓ We appreciate any help on Patreon – it lets us make a few more and better videos: http://www.patreon.com/numberphile Matt Parker on Numberphile playlist: http://bit.ly/Matt_Videos Matt’s channel: http://bit.ly/StandUpMaths Parker Square T-Shirt: http://bit.ly/ParkerSquareTshirt Inder J. Taneja papers… Single

This problem seems like it is impossible to solve because it does not have enough information. If the rectangle has an area of 10, what is the area of the triangle? After posting the video, I was told 2001 AMC 12 problem 22 was nearly the same problem: https://artofproblemsolving.com/wiki/index.php/2001_AMC_12_Problems/Problem_22 Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by

What is the fewest number of moves which can solve any Rubik’s Cube? It’s God’s Number. More links & stuff in full description below ↓↓↓ See our full series of Rubik’s Cube videos at: http://www.youtube.com/playlist?list=PLt5AfwLFPxWJNAdHv8TUCOmj7iKqyHZeg This video features Matt Parker, James Grime and Katie Steckles. More about Matt’s record attempt and those solving helpers at

Thanks to Francisco from Portugal for the suggestion! They say Euler asked this tricky algebra problem to his students. Reference https://blogs.helsinki.fi/kulikov/2010/06/16/eulers-riddle/ 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! Like many YouTubers I use popular software to prepare my videos. You can search for animation

Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ This video features Dr James Grime – http://singingbanana.com Catch James in a recent Objectivity video with Brady: https://youtu.be/B4gzt8v401Q More James Grime videos on Numberphile: http://bit.ly/grimevideos More videos on Perfect Numbers: http://bit.ly/PerfectNumbers Triperfect T-Shirt… US:

Tadashi Tokieda is back, this time with Moiré Patterns. More with Tadashi: http://bit.ly/tadashi_vids More links & stuff in full description below ↓↓↓ Out thanks also to our Patreon supporters, especially: Jeff Straathof Ken Baron Today I Found Out Roman Urbanovski Joanna & Mehdi Christian Cooper Peggy Y John Buchan Bill Shillito Andrzej ‘Yester’ Fiedukowicz Ripta

Thanks to Devan from Lilin Bangsa Intercultural School for suggesting this problem! What is the radius of the small circle in between the blue circle (radius 4) and green circle (radius 2)? This was a challenge problem for students aged 14 to 15. Thanks to all patrons! Special thanks to: Shrihari Puranik Kyle Professor X

A short preview of some stuff we’re filming for the new numberphile channel. Please subscribe. More links & stuff in full description below ↓↓↓ You can also follow us on Twitter and Facebook. 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 Brady Haran Patreon: http://www.patreon.com/numberphile Brady’s videos subreddit: http://www.reddit.com/r/BradyHaran/

This inequality is famous in math competitions and in theoretical proofs. But why is it true? The video presents a great geometric visualization and proof for two variables. Pay attention–I’ll use this inequality in an upcoming video! Desmos.com link https://www.desmos.com/calculator/6kbruja3wb Link to proofs of generalized case https://artofproblemsolving.com/wiki/index.php?title=Root-Mean_Square-Arithmetic_Mean-Geometric_Mean-Harmonic_mean_Inequality Playlist to watch all videos on MindYourDecisions This

Partitions are a major part of the Ramanujan story (as shown in the new film about his life) – but what are they? More links & stuff in full description below ↓↓↓ Dr James Grime tackles the issue. Extra footage: https://youtu.be/ksHqQW94KlE More James Grime on Numberphile: http://bit.ly/grimevideos Young Tableau: https://youtu.be/vgZhrEs4tuk Shuffling: https://youtu.be/AxJubaijQbI James discusses Good

I didn’t solve this problem myself, but I felt better when I learned WolframAlpha couldn’t solve it either! But there is a way to solve it using careful mathematical reasoning. Thanks to Luka Khizambareli from Georgia for suggesting this and sending its solution! (*And you have to be really careful–I thank Aniket Gupta and Ryan

Thanks to Nikhil Patro for suggesting this problem! What is the sum of the corner angles in a regular 5-sided star? What if the star is not regular, what is the sum of corner angles then? There are some neat ways to solve this. I present my favorite methods. Thanks to all patrons! Special thanks