Math

Thanks to Eric from Miami for suggesting this problem and sending a solution! The diagram shows a quadrilateral ABCD with the values for some angles and the length of AB. Can you figure out the area of ABCD? 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 My blog post for this video https://wp.me/p6aMk-85A
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Tadashi Tokieda cuts various combinations of loops and Mobius loops – with surprising results. More links & stuff in full description below ↓↓↓ Part 2: https://youtu.be/mh3eMt09EAs And more: http://bit.ly/tadashi_vids 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
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Can you measure exactly 4 gallons from jugs of 3 gallons and 5 gallons? This problem is featured in the movie “Die Hard With A Vengeance.” Here is the scene from the movie: https://www.youtube.com/watch?v=BVtQNK_ZUJg 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
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Tadashi explores a special set of dice… And has a powerful lesson. More links & stuff in full description below ↓↓↓ Subscribe to Numberphile: http://bit.ly/Numberphile_Sub More dice videos: http://bit.ly/Dice_Videos Playlist of Tadashi Tokieda videos: http://bit.ly/tadashi_vids Want to buy some dice like this – our friends at Maths Gear have some: http://bit.ly/MathsGearDice Discuss this video on
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This simple problem for kids is sure to stump some adults. Can you figure out the height of the table? Problem adapted from #quiz Here is a math word problem from a Chinese elementary school student's homework. Have a try to figure it out! Leave your answer in the comment. pic.twitter.com/kOlydqNDQO — China Focus (@China__Focus)
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The Prime Number Theorem shows that primes are like weeds, popping up everywhere! Dr James Grime explains — Little bit extra cut from this video: http://youtu.be/TMRZYSQGAcw More links & stuff in full description below ↓↓↓ Our prime number video collection: http://bit.ly/primevids Follow James on Twitter at: https://twitter.com/jamesgrime NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile
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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
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Beautiful Dragon Curves, Fractals and Jurassic Park. Featuring Rob Eastaway. More links & stuff in full description below ↓↓↓ Rob’s website: http://www.robeastaway.com/ Thanks to Matthew Ward and Faraz Barzideh who helped Brady out with some curves! The book Jurassic Park is by the late Michael Crichton. NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets:
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Ultimate Tic Tac Toe, also known as Nine Board Tic Tac Toe, is an interesting variation on the classic game. The board is composed of a 3×3 grid of Big Squares. Inside of each Big Square is another 3×3 grid, so there are 9 Small Squares inside each Big Square. The position you play in
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Dr Tony Padilla’s unique (and low budget) twist on the Buffon’s Needle experiment to learn the true value of Pi. More links & stuff in full description below ↓↓↓ OUR PI VIDEOS — ALEX BELLOS AND ROGER DISCUSS ITS HISTORY BOUNCING BALLS AND A STRANGE PROPERTY MATCHES HELP FIND PI THE SOUND OF PI NUMBERPHILE
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A calculus problem went viral! Some major websites are reporting that students at a university in China had to solve this for the WiFi password in a dining hall. This is actually a pretty fun calculus problem. Watch the video for its solution! Sources http://tech.ifeng.com/a/20180907/45156013_0.shtml http://www.dailymail.co.uk/news/article-6142997/Chinese-university-canteen-makes-students-answer-calculus-question-unlock-access-Wi-Fi.html https://www.cnet.com/news/wi-fi-access-only-granted-to-students-in-china-after-they-solve-a-puzzle/ https://en.wikipedia.org/wiki/Zu_Chongzhi https://www.ict4us.com/r.kuijt/en_pi_onthouden.htm My blog post for this video
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Part Three of Golden Ratio Trilogy Why the Lucas Numbers are better than the Fibonacci Sequence. More links & stuff in full description below ↓↓↓ Matt’s signed book (& extra goodies): http://bit.ly/Matt_Signed Amazon (UK): http://bit.ly/Matt_4D_UK Amazon (US): http://bit.ly/Matt_4D_US All links to videos in this four-part trilogy: Brady Numbers: http://youtu.be/D8ntDpBm6Ok Proof: http://youtu.be/dTWKKvlZB08 Lucas Numbers: http://youtu.be/PeUbRXnbmms Extra
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Main video is at: http://youtu.be/seUU2bZtfgM This is some extra stuff from Simon Pampena we didn’t use in the first video! More links & stuff in full description below ↓↓↓ 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/ Brady’s latest videos across
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Warren Buffett once challenged Bill Gates to a dice game similar to this one. How would you play the game? Blog post (text explanation) http://wp.me/p6aMk-4ro Source The dice numbers and the story are described at Microsoft Research’s website for non-transitive dice http://research.microsoft.com/en-us/projects/dice/ If you like my videos, you can support me at Patreon: https://www.patreon.com/mindyourdecisions Connect
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Not all jokes are in base 10… More links & stuff in full description below ↓↓↓ With thanks to Audible – http://www.audible.com/numberphile (book details below) More jokes explained at: http://youtu.be/JJQWtGm3eIs Animation by by Pete McPartlan – http://www.petemcpartlan.co.uk Explanations by Matt Parker – http://www.standupmaths.com This video was posted during YouTube Comedy Week: http://yt.be/comedyweek Leave more joke
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Patreon: http://www.patreon.com/numberphile More links & stuff in full description below ↓↓↓ Tony Padilla is an associate professor of physics at the University of Nottingham. Here he discusses the zeta function and Apéry’s Constant. More Tony videos: http://bit.ly/Padilla_Numberphile Tony’s Tweet: https://twitter.com/DrTonyPadilla/status/828527018081918976 Roger Apéry pics courtesy of François Apéry Numberphile is supported by the Mathematical Sciences Research
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Cliff Stoll is passionate about Klein Bottles. More links & stuff in full description below ↓↓↓ Don’t miss the video about how he uses a robot to store 1,000 bottles UNDER his house… https://youtu.be/-k3mVnRlQLU More videos on Klein Bottles: http://bit.ly/KleinBottles ACME Klein Bottles: http://bit.ly/ACME_Klein Support us on Patreon: http://www.patreon.com/numberphile NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook:
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Graham’s Number (Numberphile T-Shirt): http://bit.ly/Grahams_T-Shirt More links & stuff in full description below ↓↓↓ The magnitude of Graham’s Number is difficult to fathom – Ron Graham himself attempts to explain. WHAT IS the number: http://youtu.be/HX8bihEe3nA Extra footage: http://youtu.be/rGWuimr5CGQ Our original Graham’s Number video: http://youtu.be/XTeJ64KD5cg Any errors in this video are mine (Brady’s) in editing… For
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