Math

A triangle with sides of 4, 3, and 5 is drawn inside a square as shown. What is the length of the square’s side? It’s a fun little geometry problem! Sources View this post on Instagram #mathematics⁩ ⁦‪#satexam‬⁩ ⁦‪#actexam‬⁩ ⁦‪#mathteacher‬⁩ ⁦‪#teachmath‬⁩ ⁦‪#study‬⁩ ⁦‪#riddle‬⁩ ⁦‪#thinking‬⁩ ⁦‪#learning‬⁩ ⁦‪#yks‬⁩ ⁦‪#test‬⁩ ⁦‪#gercekboss‬⁩ ⁦‪#eylemmath‬⁩ ⁦‪#gercekboz‬⁩ ⁦‪#highschool‬⁩ ⁦‪#geometry‬⁩ ⁦‪#calculus‬⁩ ⁦‪#algebra‬⁩ ⁦‪#stem‬⁩
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It may not be exactly 99 percent, but many people will get the incorrect answer. It’s a great teaching opportunity. Learn how to solve this problem! (There are multiple ways, I am presenting one valid method). Previous video Source View this post on Instagram #mathematics‬⁩ ⁦‪#satexam‬⁩ ⁦‪#actexam‬⁩ ⁦‪#mathteacher‬⁩ ⁦‪#teachmath‬⁩ ⁦‪#study‬⁩ ⁦‪#riddle‬⁩ ⁦‪#thinking‬⁩ ⁦‪#learning‬⁩ ⁦‪#yks‬⁩ ⁦‪#test‬⁩
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Part Two: http://youtu.be/LBPj8E1JKaQ Featuring Simon Pampena – https://twitter.com/mathemaniac 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 Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran Brady’s videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady’s latest
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Signup for your free trial to The Great Courses Plus here: http://ow.ly/b5wA30hIviV (sponsor) More links & stuff in full description below ↓↓↓ James Grime on a proof involving Pythagorean Triples. James Grime: http://singingbanana.com (book him for a talk) More on the proof: https://www.cs.utexas.edu/~marijn/ptn/ Preprint of the paper: https://arxiv.org/abs/1605.00723 Ron Graham videos: http://bit.ly/Ron_Graham Numberphile is supported
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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 Playlist to watch all videos on
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This puzzle has been shared with dubious claims, but it is still a fun logic problem. Can you figure it out? Examples of puzzle and variants on social media sites Combination lock riddle from puzzles https://puzzling.stackexchange.com/questions/46871/crack-the-lock-code 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
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This is adapted from a problem given to 14-16 year old students. Watch the video to learn how to solve it! Source (in Spanish) http://mimosa.pntic.mec.es/jcolon/pjanteriores3.html http://mimosa.pntic.mec.es/jcolon/soluciones3.html#3-14p27 “Learn Right, Not Rote.” Kalid Azad, BetterExplained (https://betterexplained.com/) Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Playlist to watch all videos on MindYourDecisions: https://www.youtube.com/playlist?Subscribe https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Click to watch all my videos! Send me suggestions by
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Get your first audiobook free with an Audible 30-day trial. Go to http://www.audible.com/numberphile or text numberphile to 500 500. More links & stuff in full description below ↓↓↓ This video features Edmund Harriss from University of Arkansas. Extra footage from this interview: https://youtu.be/7ehaadVtaMI Heesch’s Tiling Problem by Casey Mann: http://faculty.washington.edu/cemann/Heesch.pdf Check out the Numberphile Podcast:
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Zsuzsanna Dancso trisects an angle using origami – follows on from this video about Euclidean geometry: http://youtu.be/6Lm9EHhbJAY More links & stuff in full description below ↓↓↓ Special thanks to the Patreon supporters listed below: Herschal Sanders (from Susan) Lê OK Merli Alex Bozzi Thomas J Petersen Spiked Math Filipe Junqueira Bill Shillito plusunim Micky Baeza
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This is a fun little geometry problem! DataGenetics http://datagenetics.com/blog/november22016/index.html How to solve the shape-shifting triangle Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Playlist to watch all videos on MindYourDecisions: https://www.youtube.com/playlist?Subscribe https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Click to watch all my videos! Send me suggestions by email (address in video). I consider all ideas! Get early access to my videos and support the channel on
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Edmund Harriss introduces a very cool tiling and talks about Tribonacci Numbers. More links & stuff in full description below ↓↓↓ Numberphile Podcast: https://www.numberphile.com/podcast Or on YouTube: http://bit.ly/Numberphile_Pod_Playlist More Edmund on Numberphile: http://bit.ly/Ed_Harriss_Playlist Ed Harriss is online at http://maxwelldemon.com and on Twitter at https://twitter.com/gelada Papers relating to this video… Nombres algébriques et substitutions: http://archive.numdam.org/item/BSMF_1982__110__147_0/ Algebraic
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Preston McAfee is the chief economist at Microsoft. More links & stuff in full description below ↓↓↓ Benford’s Law: https://youtu.be/XXjlR2OK1kM Preston McAfee: http://www.mcafee.cc Animation by Pete McPartlan Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile MSRI on Twitter: https://twitter.com/mathmoves We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to
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I saw this fun problem online. Watch the video for an “outside the box” solution! Source View this post on Instagram #mathematics‬⁩ ⁦‪#satexam‬⁩ ⁦‪#actexam‬⁩ ⁦‪#mathteacher‬⁩ ⁦‪#teachmath‬⁩ ⁦‪#study‬⁩ ⁦‪#riddle‬⁩ ⁦‪#thinking‬⁩ ⁦‪#learning‬⁩ ⁦‪#yks‬⁩ ⁦‪#test‬⁩ ⁦‪#gercekboss‬⁩ ⁦‪#eylemmath‬⁩ ⁦‪#gercekboz‬⁩ ⁦‪#highschool‬⁩ ⁦‪#geometry‬⁩ ⁦‪#calculus‬⁩ ⁦‪#algebra‬⁩ ⁦‪#stem‬⁩ ⁦‪#reasoning‬⁩ ⁦‪#math‬⁩ ⁦‪#competition‬⁩ ⁦‪#amc‬⁩ ⁦‪#aime‬⁩ ⁦‪#olympiad‬⁩ ⁧‫#سباق_الرياضيات‬⁩ A post shared by gercekboss (@gercekboss) on May
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This was given to 13-14 year olds in Russia. Thanks to Egor Nazarov for suggesting this problem! Thanks to all patrons! Special thanks this month to Kyle, Michael Anvari, Richard Ohnemus, Shrihari Puranik. Get early access to videos and support the channel on Patreon https://www.patreon.com/mindyourdecisions Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Playlist to watch all videos on MindYourDecisions: https://www.youtube.com/playlist?Subscribe
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Persi Diaconis (Stanford University) on card shuffling. See full description for links to additional videos and detailed papers. More links & stuff in full description below ↓↓↓ EXTRAS FROM THIS INTERVIEW — 1/3: https://youtu.be/1jfm42Qd7Qw — 2/3: http://youtu.be/c_Hunaf0tWw — 3/3: http://youtu.be/RIGJH12vVCY Cards and shuffling videos: http://bit.ly/Cards_Shuffling PAPERS Trailing the Dovetail to its Lair (7 shuffles)): http://bit.ly/1xU6uPI
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The problem is a little bit complex, but the answer is delightfully sur-pi-sing! 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 Send me your favorite puzzles/suggestions by email (address in video). I get so many emails that I may not reply, but I save all suggestions. This is the only channel to feature
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This is a fun problem I saw on Twitter. Watch to learn the solution! Sources #maths, #jeux, #enigmesLe grand carré a un sommet qui passe par le milieu d'un côté de l'autre carré. Quelle fraction de l'aire totale correspond à l'aire coloriée en rouge ? 😀 pic.twitter.com/hY4HUEy9QQ — Le Bécachel Sébastien (@le_becachel) May 28, 2019
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People are sharing a video about a US teacher who could not solve a problem from China’s university entrance exam, known as the gaokao. It’s a fairly challenging problem, and I show how to solve it in this video. Thanks for translating the problem into English! Tweets by ChitlangiaViral Tweets by GeraecXeupieac Tweet me Tweets
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Henry Segerman (mathematician and 3D printing guru) discusses how to make three gears work together. More links & stuff in full description below ↓↓↓ Skew dice: https://youtu.be/uAnCL3vhVIs Check Henry’s book about 3D printing math: http://amzn.to/2cWhY3R Prime Numbers Playlist: http://bit.ly/primevids Prime Machine: https://youtu.be/8UqCyepX3AI You can buy the gears from Henry at Shapeways: http://bit.ly/HenryGears Support us on
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People often email me that my videos helped them get a tech or finance job, which is really awesome, and I want to do more to help! So in this video I’m sharing a problem based on an interview question asked at Facebook. Source https://www.glassdoor.com/Interview/You-re-about-to-get-on-a-plane-to-Seattle-You-want-to-know-if-you-should-bring-an-umbrella-You-call-3-random-friends-of-y-QTN_519262.htm (Note: I re-uploaded this video with corrections. The original calculations
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Our Pi Playlist (more videos): http://bit.ly/PiPlaylist Pi is famously calculated to trillions of digits – but Dr James Grime says 39 is probably enough. More links & stuff in full description below ↓↓↓ An extra note from Dr Grime: “Since pi39 ends in 0, you may think we could use pi38 instead – which has
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This problem stumped me! But it has a pretty nice solution. Thanks to all patrons! Special thanks this month to Kyle, Michael Anvari, Richard Ohnemus, Shrihari Puranik. Source Emailed to me about 2 years ago, traced to the Australian Intermediate Olympiad given in 2013. 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 Send
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T-shirt and poster details below. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ Featuring Neil Sloane from the OEIS: https://oeis.org And thanks to Jonathan Wild: https://www.mcgill.ca/music/jonathan-wild OEIS A250001 – Number of arrangements of n circles in the affine plane: https://oeis.org/A250001 3-Circles T-Shirt: https://teespring.com/three-circles-numberphile
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