Math

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

Tadashi discusses pressure and lift… with a toy of course! More links & stuff in full description below ↓↓↓ Lift and wings on Sixty Symbols: https://youtu.be/PF22LM8AbII Tadashi Playlist: http://bit.ly/tadashi_vids You can buy version of this toy on Amazon: https://amzn.to/2MLfpSC (affiliate link) Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also

A quick little problem from Cliff Stoll, who baked a birthday cake for Brady… More links & stuff in full description below ↓↓↓ A trilogy of mathematical cake cutting videos… http://bit.ly/CakeCuttingTrilogy See more Cliff videos: http://bit.ly/Cliff_Videos The scientific way to cut a cake… https://youtu.be/wBU9N35ZHIw Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile

If you ever need to practically convert temperature from weather reports, this is a neat little trick. Just memorize a few values and you can easily convert. I saw this trick in a Lifehacker article. #shorts References https://lifehacker.com/how-to-convert-celsius-to-fahrenheit-without-doing-any-1848777530 https://en.wikipedia.org/wiki/Fahrenheit#/media/File:Thermometer_CF.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

What’s the area bound by the lines x + y = 5, x + 2y = 6 and the y-axis? I present one way to solve this 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 purchase

Truncatable Primes with Dr James Grime… Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ Dr James Grime is available for public talks. See his website: http://singingbanana.com More videos with Dr Grime: http://bit.ly/grimevideos The Eastaway Prime Pencil (Pack of 11 via Mathsgear): http://bit.ly/357686312646216567629137pencil

Here’s a fun game you can play with another person. The game starts on January 1. Each of two players takes turns calling out another date. The new date has to be a later date in the year with either the same month OR the same day (from January 1, a player can call out

More Cliff Stoll videos: http://bit.ly/Cliff_Videos More links & stuff in full description below ↓↓↓ Our first Borromean Ring Video: https://youtu.be/x6Ml4AEt0kk Tadashi does Borromean Rings: https://youtu.be/Ra9I_-o2LHM Knot playlist: http://bit.ly/Knot-a-Phile 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

Every year some NBA team seems to make the playoffs with a losing or barely even record. This video considers how extreme the example can go. WATCH how an NFL team with 0 wins could make the playoffs: https://www.youtube.com/watch?v=3xXyauro_kc Worst nba playoff teams: http://www.sbnation.com/nba/2014/4/4/5581984/nba-playoffs-history-bulls-spurs-knicks-cavaliers NBA scheduling: http://www.nbastuffer.com/component/option,com_glossary/Itemid,0/catid,44/func,view/term,How%20the%20NBA%20Schedule%20is%20Made/ If you like my videos, you can support

The legendary Don Knuth on the Dragon Curve and learning from his mistakes. More links & stuff in full description below ↓↓↓ Reddit discussion: http://redd.it/2qt0f4 More Dragon Curve: http://bit.ly/DragonList Don Knuth’s book “Selected Papers on Fun and Games” has an excellent chapter going into this in more detail. Buy in US: http://amzn.to/149fBnL Buy in UK:

First watch how to calculate cube roots: https://www.youtube.com/watch?v=Ds8ijPsg26g 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 you can follow me on whichever method is most convenient for you. My Blog: http://mindyourdecisions.com/blog/ Twitter: http://twitter.com/preshtalwalkar

Squarespace (including 10% off): https://www.squarespace.com/numberphile Video features Matt Parker. More links & stuff in full description below ↓↓↓ Parker CIRCLE T-Shirts and Mugs (torment Matt at his live shows!): https://teespring.com/stores/parker-circle Parker Square: http://bit.ly/ParkerSquareTshirt More from this interview: https://youtu.be/RLZCpMPIeMc More Matt on Numberphile: http://bit.ly/Matt_Videos Matt Parker’s own channel: https://www.youtube.com/user/standupmaths Matt’s book on 4D stuff:http://bit.ly/Matt_4D_US or http://bit.ly/Matt_4D_UK

Make the equation correct by adding one blue dot, or erasing one blue dot. A single dot changes everything! Keep It 💯 Puzzle: 4 dots to make this true! Sources One of these pixels on the scoreboard should be either turned off or turned on. byu/EebamXela inmathpuzzles https://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_medium;action=display;num=1091299465 https://www.utest.com/forums/11636/page/1 Playlist to watch all videos on

Part One: https://youtu.be/wGkvyN6s9cY Featuring Tadashi Tokieda. More links & stuff in full description below ↓↓↓ More Tadashi videos: http://bit.ly/tadashi_vids Raw paperclips slow motions: https://youtu.be/zuX5yy_93JA Video by Brady Haran and Pete McPartlan (animations by Pete) 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

A dog, cat, and mouse run around a triangle at different speeds. Can you figure out angle ABC? It seems impossible but the answer works out magically! Thanks to Zaki for suggesting this problem. 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

Featuring Neil Sloane from the OEIS. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor)… More links & stuff in full description below ↓↓↓ Part 2: https://youtu.be/HFeKdMf01rQ Neil Sloane is the founder of the The On-Line Encyclopedia of Integer Sequences. Visit it here: https://oeis.org More Neil Sloane on Numberphile: http://bit.ly/Sloane_Numberphile Numberphile is supported

Thanks to Pedro in Argentina for suggesting this! The problem is adapted from the TESBA test. It’s a fun one! Sources https://en.wikipedia.org/wiki/Argentina#/media/File:Flag_of_Argentina.svg https://en.wikipedia.org/wiki/Argentina#/media/File:Argentina_orthographic.svg http://www-news.uchicago.edu/releases/98/980417.calderon.shtml 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? Get early access and

Do political beliefs affect mathematical ability!? More links & stuff in full description below ↓↓↓ Featuring Dr James Grime. Here is the paper referred to: http://bit.ly/wrecksmath Maths vs Math: http://bit.ly/MathorMaths Brown papers: http://bit.ly/brownpapers 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/

A geometry textbook has the following problem: “A right triangle has a hypotenuse equal to 10 and an altitude to the hypotenuse equal to 6. What is the area of the triangle?” Can you figure out the correct answer? Blog post (text/image explanation): http://wp.me/p6aMk-4t8 Special thanks to the following patrons! Kyle Alberto Nishikawa Brian M.

Featuring Matt Parker… Part 2 (solution) here: https://youtu.be/pasyRUj7UwM More links & stuff in full description below ↓↓↓ Discuss this video on Brady’s subreddit: https://redd.it/6628q2 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

Thanks to James for the suggestion! If a hen and a half lay an egg and a half in a day and a half how many eggs would one hen lay in one day? #math #maths #mathematics #shorts Sources https://www.mathsisfun.com/puzzles/one-and-a-half-hens-solution.html https://en.wikipedia.org/wiki/Conversion_of_units Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I

Some of your favourite maths jokes are dissected in forensic fashion. More links & stuff in full description below ↓↓↓ It is YouTube Comedy Week: http://yt.be/comedyweek Animation by Pete McPartlan – http://www.petemcpartlan.co.uk Explanations by Matt Parker – http://www.standupmaths.com More jokes explained at: http://youtu.be/Fmb3TCvlET Leave more joke suggestions in the comment section. NUMBERPHILE Website: http://www.numberphile.com/ Numberphile

Thanks Squarespace: https://www.squarespace.com/numberphile More links & stuff in full description below ↓↓↓ Full length colouring video: https://youtu.be/a-6oOVdU7Oo Alex Bellos books (including colouring books): http://bit.ly/BellosBooks Colouring by Tiffany Arment: https://twitter.com/tiffanyarment (or coloring as it is America!) Thanks to Loretta Kolakoski for pictures of William (Bill). OEIS entry: https://oeis.org/A000002 Oldenburger paper (1939) pre-dating Kolakoski: http://www.ams.org/journals/tran/1939-046-00/S0002-9947-1939-0000352-9/S0002-9947-1939-0000352-9.pdf (the sequence

Which point minimizes the sum to 4 given points on a rectangle? Thanks to Chanul for suggesting this problem, which is adapted from a Sri Lankan Olympiad question. Special thanks this month to: Michael Anvari, Kyle. Thanks to all supporters on Patreon! http://www.patreon.com/mindyourdecisions References Geometric median https://en.wikipedia.org/wiki/Geometric_median Plastria, Frank. (2006). Four-point Fermat location problems revisited.

This video features Dr Hannah Fry (more links below) ↓↓↓ Check out Brilliant.org: https://brilliant.org/numberphile (20% off premium subscription) That circle cutting problem on Brilliant: https://brilliant.org/NumberphileSandwich Hannah Fry on Twitter: https://twitter.com/FryRsquared Read about Hannah’s Xmas book (and buy a copy to show her some support!): http://www.bradyharanblog.com/blog/hannahs-book More Hannah videos on Numberphile: http://bit.ly/hannah_vids Animation by Pete McPartlan

This question appeared on the October 1980 SAT exam. Like all questions, it was supposed to have exactly one correct answer. However the test-makers made a mistake. Can you figure out what they did wrong? Blog post (text explanation): http://wp.me/p6aMk-4vX Source Fiske, Edward B. “A Second Student Wins Challenge on Answer To Math Exam Problem.”

Probability expert Professor Persi Diaconis (Stanford University) talking about dice. More links & stuff in full description below ↓↓↓ Part 2: https://youtu.be/8UUPlImm0dM Tadashi and Dice: https://youtu.be/zzKGnuvX6IQ More dice videos: http://bit.ly/Dice_Videos More Persi Diaconi videos: http://bit.ly/Persi_Videos Diaconis/Keller paper on fair dice: http://bit.ly/FairDicePaper 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:

The game starts with 6 empty glasses in a row numbered 1 to 6. You roll a standard die. If the number for the glass is empty, then the glass is filled up. If the number for the glass is full, then you drink that glass. There is a special rule when 5 glasses are

Here are more pics of the doodle: http://bit.ly/Doodle_Images More links & stuff in full description below ↓↓↓ And make sure you subscribe to Objectivity: https://www.youtube.com/c/objectivityvideos Thanks to Keith Moore at the Royal Society – https://royalsociety.org 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

Thanks to Moaaz for the suggestion! Can you solve this challenging geometry problem? 0:00 Problem 0:55 Solution 1 3:09 Solution 2 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

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 you can follow me on whichever method is most convenient for you. My Blog: http://mindyourdecisions.com/blog/ Twitter: http://twitter.com/preshtalwalkar Facebook: https://www.facebook.com/pages/Mind-Your-Decisions/168446714965 Google+: https://plus.google.com/108336608566588374147/posts Pinterest: https://www.pinterest.com/preshtalwalkar/ Tumblr: http://preshtalwalkar.tumblr.com/

Ben Sparks shows us a simple problem that takes some fascinating twists. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ More videos with Ben Sparks: http://bit.ly/Sparks_Playlist Catch a more in-depth interview with Ben on our Numberphile Podcast: https://youtu.be/-tGni9ObJWk Ben’s website: https://www.bensparks.co.uk Numberphile is

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

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:

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

Dr James Grime and a handy trick for checking calculations. Ditch the nines… More links & stuff in full description below ↓↓↓ Some extra footage from this interview: https://youtu.be/wQsQ8joretY 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

A number of galactic proportions… See more #MegaFavNumbers on this playlist – https://bit.ly/MegaFavNumbers – and read below to contribute your own. More links & stuff in full description below ↓↓↓ See our full collection of video on the sum of three cubes at: http://bit.ly/SumOfCubes (*) the cube (which we depicted quite loosely and artistically, of

Some say only geniuses can solve this one. The video presents a sentence and asks you to identify all of the five errors. Can you figure it out? It is a tricky but I think many of you are clever enough to figure it out. My blog post for this video: https://wp.me/p6aMk-5iC If you like

Tech companies like Google have asked this question during interviews. A cat is hiding in one of five boxes that are lined up in a row. The boxes are numbered 1 to 5. Each night the cat hides in an adjacent box, exactly one number away. Each morning you can open a single box to

George Dantzig, William Sidis, Srinivasa Ramanujan? Who was the real Good Will Hunting? More links & stuff in full description below ↓↓↓ Maths in Good Will Hunting: http://www.youtube.com/watch?v=iW_LkYiuTKE This video features Numberphile’s very own mathematics superstar – Dr James Grime. 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

James Grime on the Hadwiger–Nelson problem. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) Extra footage from this interview: https://youtu.be/7nBtRKvUox4 The Four Color Map Theorem: https://youtu.be/NgbK43jB4rQ More on James Grime (you can book him for talks): http://singingbanana.com More James Grime videos: http://bit.ly/grimevideos The de Grey paper: https://arxiv.org/abs/1804.02385 A good write up on

The Braess Paradox is an unexpected result from network theory. It states that adding capacity could actually slow down the speed of the network. Applied to highways, the Braess Paradox means the existence of some roads slows down traffic, or that closing some roads could speed up traffic. The Braess Paradox can also explain the

Continuing on from Zvezda’s previous video about Ptolemey’s Theorem (see: https://youtu.be/bJOuzqu3MUQ) now we use it to prove some cool stuff with pentagons and equilateral triangles. More links & stuff in full description below ↓↓↓ Zvezda’s Numberphile playlist: http://bit.ly/zvezda_videos Zvezda’s webpage: https://math.berkeley.edu/~stankova/ Golden Ratio: https://youtu.be/sj8Sg8qnjOg Epic Circles: https://youtu.be/sG_6nlMZ8f4 Triangle Magic Highway: https://youtu.be/wVH4MS6v23U Numberphile is supported by

Can you solve this tricky question? #maths #math #mathematics #shorts Hardest GCSE maths questions list (Edexcel June 2018 Higher Paper 1 – Question 6) Top 10 Hardest GCSE Maths Questions in 2024 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!

You can solve this in seconds with logic. #math #maths #mathematics #shorts References https://thecollegepanda.com/12-tricky-sat-math-questions/ https://brainly.com/question/13082487 https://artofproblemsolving.com/wiki/index.php/2003_AMC_10B_Problems/Problem_15 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