Math

Rotating cedar balls. Here’s a playlist of Tadashi Tokieda videos: http://bit.ly/tadashi_vids More links & stuff in full description below ↓↓↓ Electric slide rule: https://youtu.be/MEyIppEOQTw 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
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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
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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 bought a cow for $800. I sold it for $1000. I bought it again for $1100. I sold it again for $1300. How much did I earn? This seemingly simple problem has sparked plenty of discussion online, and top search results are even showing the wrong answer. It’s time to present the correct answer.
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Thanks to Kieran in New Zealand for suggesting this problem! A version of this problem was given to students in Taiwan. 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
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Johnny Ball discusses Archimedes and the volume of a sphere. Check out https://www.kiwico.com/Numberphile and get 50% off your first month of any subscription (sponsor) More links & stuff in full description below ↓↓↓ Johnny Ball: https://johnnyball.co.uk More Numberphile videos with Johnny Ball: http://bit.ly/Johnny_Ball Johnny Ball books: https://amzn.to/3v8Xxqx Numberphile is supported by the Mathematical Sciences Research
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Which method were you taught? #shorts #math #maths #mathematics 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 I earn from qualifying
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Explains this trick: http://youtu.be/pdqkrqHDF7g 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
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This is a fun one from a UK maths competition. UKMT 2008 SMC solutions https://archive.ukmt.org.uk/pdfs/archive/SMC2008_sol_short.pdf 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
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Thanks to Patrick from Germany for suggesting this problem! Students were supposed to solve it in less than 1 minute with no calculator. Special thanks this month to: Nida Davis, Richard Ohnemus, Shrihari Puranik, Kyle, Michael Anvari . Thanks to all supporters on Patreon! http://www.patreon.com/mindyourdecisions References 2018 Raytheon MATHCOUNTS National Competition (link includes timestamp around
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Neil Sloane discusses peaceable queens and chess. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ Learn more at the OEIS entry (loads of links): https://oeis.org/A250000 References: Ainley, Stephen. Mathematical Puzzles. London: G Bell & Sons, 1977. Yukun Yao and Doron Zeilberger, Numerical and
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What is the sum of all even divisors of 1000? #math #maths #mathematics #shorts Source http://math.stackexchange.com/questions/1923419/what-is-the-sum-of-all-positive-even-divisors-of-1000 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
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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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Since the internet is perfectly logical, I’m sure everyone will solve this easily and there will be no arguments 🤣😂 #math #maths #logic #mathematics #shorts Source https://puzzling.stackexchange.com/questions/60009/the-knight-never-lies-the-knave-always-lies-and-the-spy-either-lies-or-tells-t 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
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Thanks to Abisheik for the suggestion! This is a fun little geometry problem. #math #maths #mathematics #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 through these links, I may be compensated for purchases made on Amazon.
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This is a nice one similar to questions on admissions tests. Adapted from IUT 2016-17 Admission Test MCQ 59 https://admission.iutoic-dhaka.edu/assets/admission/2016-2017.pdf https://gmatclub.com/forum/there-are-2-parallel-line-segments-ab-and-cd-in-a-plane-225512.html 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
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This is a nice conditional probability question adapted from an admissions test. #math #maths #mathematics #shorts IUT 2016-17 Admission Test MCQ 85 Conditional Probability and Multiple Choice https://admission.iutoic-dhaka.edu/assets/admission/2016-2017.pdf 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
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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
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Thanks to Min for the suggestion! This problem comes from a maths competition in Singapore and is a very interesting geometry question. 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
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Neil Sloane on the Van Eck Sequence… Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ More Neil Sloane: http://bit.ly/Sloane_Numberphile Van Eck sequence on OEIS: https://oeis.org/A181391 Afraid So is by Jeanne Marie Beaumont Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile
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This is from a practice GMAT test. #math #maths #mathematics #shorts Credit https://gmatclub.com/forum/on-the-number-line-shown-above-the-tick-marks-are-equally-spaced-198106.html 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
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You have to think about this one. #math #maths #mathematics #shorts I honestly would have mindlessly solved the question myself without thinking. I’ve seen versions of this problem. I think this the link below the original video but do let me know if another video was earlier so I can provide proper credit: @your.bummy.math.tutor Can
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This is said to be one of the hardest GRE math questions. #math #maths #mathematics #shorts References https://gre.myprepclub.com/forum/of-the-20-lightbulbs-in-a-box-2-are-defective-an-inspector-1859.html https://www.manhattanprep.com/gre/blog/hardest-gre-math-problems/ 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
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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 https://www.instagram.com/p/BxOfZBVB2Mo/ Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address in video). I consider all ideas though
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Thanks to Ninad and Kulvardhan for the suggestion! The YouTube channel Vedantu Math shared a challenging problem saying only 1 percent can solve it. I admit I did not solve it. But I am happy to share the interesting solution. Special thanks this month to: Mike Robertson, Daniel Lewis, Robert Zarnke, Kyle, Lee Redden. Thanks
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In a worldwide study, 42 percent got this one correct. #math #maths #mathematics #shorts TIMMS 2015 Advanced Mathematics Exhibit M2.5.4: High International Benchmark – Example Item 4 https://timssandpirls.bc.edu/timss2015/international-results/wp-content/uploads/filebase/advanced/full%20pdfs/TA15-International-Results-in-Advanced-Mathematics-and-Physics.pdf 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
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This is a tricky but fun geometry problem! Special thanks this month to: Michael Anvari, Kyle. Thanks to all supporters on Patreon! http://www.patreon.com/mindyourdecisions Adapted from Math Kangaroo paper problem 22 https://www.mathkangaroo.in/media/pdf/16556_Grade_8_Math_Kangaroo_Sample_Paper_-2019.pdf STEM4all video 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
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They say this is one of the harder SAT questions. #shorts #math #maths #mathematics Sources https://www.insider.com/hard-sat-math-questions-test-practice-2018-3#many-people-misread-this-question-about-the-original-price-of-a-laptop-1 https://www.lovethesat.com/sat-math-question-almost-everyone-misses 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.
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This is based on an official SAT practice question. #math #maths #mathematics #shorts College Board Twitter Reply with your answer to this #SATPractice question, and we'll post the right one later today! pic.twitter.com/BfbFuE8CFu — College Board (@CollegeBoard) April 22, 2022 Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me suggestions by email (address at end of many videos). I may
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