# Math

Thanks to Arber for the suggestion! If AB = AC = AD and BAC = 50 degrees, what is the measure of BDC? This is a nice geometry problem! #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
One of the most famous stories from the sort of cricket involves numbers, averages, and a duck. More links & stuff in full description below ↓↓↓ Archive footage courtesy of AP Archive: https://www.youtube.com/c/aparchive * Batting average list shown was current in December 2017. It includes one still active player (Australian Steve Smith) whose average will
This is one of the top posts on Reddit’s Homework Help. #shorts [Grade 9 Math: Puzzle Involving Toothpicks] from HomeworkHelp 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
High school geometry is the only super power you need to solve this puzzle! 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 software tutorials on YouTube to learn how
What is the distance between towns A and B? Learn how to solve this mysterious problem–a similar problem was a question to quality for the US Math Olympiad! Sources Qbyte Nick’s mathematical puzzle, number 75 http://www.qbyte.org/puzzles/p075s.html AoPS 2017 AMC 10A, problem 9 (US Olympiad qualifying test) https://artofproblemsolving.com/wiki/index.php/2017_AMC_10A_Problems/Problem_9 Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address
Complex patterns seen in nature can be generated from relatively simple equations and a golden angle. Song credits Song: Sunflower (Spider-Man: Into the Spider-Verse) Artist: Post Malone, Swae Lee Album: Sunflower References https://en.wikipedia.org/wiki/Fibonacci_number#Nature https://en.wikipedia.org/wiki/Fermat%27s_spiral Fan Wen, CC-BY-SA-4.0 https://commons.wikimedia.org/wiki/File:Helianthus_annuus_-_flower_view_01.jpg Sunflower Javascript code https://www.codeproject.com/Articles/1221341/The-Vogel-Spiral-Phenomenon Sunflower Desmos https://www.desmos.com/calculator/vgh92uz9kl
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!
Happy Pi Day! Sato Moshun and Leonardo da Vinci independently devised an incredible visualization to find the formula for a circle’s area. #Shorts (Apologies there was no early access on Patreon–I finished making the video just in time for Pi Day). Wikipedia https://en.wikipedia.org/wiki/Area_of_a_circle#Rearrangement_proof Cut The Knot area of a circle https://www.cut-the-knot.org/Curriculum/Geometry/AreaOfCircle.shtml Area of a circle,
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:
This is a visual way to understand Brahmagupta’s quadratic formula. #Shorts Song Credits Song: Kajra Re Singers: Alisha Chinai, Shankar Mahadevan, Javed Ali Music: Shankar-Ehsaan-Loy Lyrics: Gulzar Lucas Vieira animation https://1ucasvb.tumblr.com/post/42739093986/completing-the-square https://en.wikipedia.org/wiki/File:Completing_the_square.gif Cornell Mathematics professor David W. Henderson: Geometric Solutions of Quadratic and Cubic Equations. https://pi.math.cornell.edu/~dwh/papers/geomsolu/geomsolu.html But Why? Intuitive Mathematics (Archived) https://web.archive.org/web/20160821053459/https://sites.google.com/site/butwhymath/algebra/the-quadratic-formula MindYourDecisions posts The
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
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
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
Simpsons Book: http://amzn.to/1fKe4Yo — Main Fermat Theorem video: http://youtu.be/qiNcEguuFSA — Water Ballons: http://youtu.be/nacPIOb68Ws More links & stuff in full description below ↓↓↓ Author Simon Singh on Fermat’s Last Theorem in popular culture, especially The Simpsons. Also mentioning Al Jean and David X Cohen. 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
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? from askphilosophy
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