The 17th annual Brazilian Olympiad featured an incredibly tricky logic puzzle that went viral on social media. Thanks to Guilherme …
Math
Extra footage at: https://youtu.be/ue9LHv4XXBQ – Featuring Ayliean MacDonald. More links & stuff in full description below …
Extra footage at https://youtu.be/-r2agPNx0gA – Featuring Jared Duker Lichtman. More links & stuff in full description below …
Three squares are formed on the three sides of an equilateral triangle. Each square has a side length equal to 1. What is the …
Students in Thailand had to solve a similar question, and there is a very clever way to solve this one. Special thanks this month to: …
This seems like it’s impossible to solve at first! But it’s a really nice question from a mathematical Olympiad qualifying test in …
The recent GCSE exam left many students baffled. Here’s how to solve one of more challenging questions. Thanks to Joe and …
Dr Harini Desiraju discusses Somos Sequences and a number which breaks a streak. More links & stuff in full description below …
If you ever need to practically convert temperature from weather reports, this is a neat little trick. Just memorize a few values and …
This is one of the harder calculus problems I’ve come across. Thanks to Nguyen Huynh Khoi from Vietnam for the suggestion!
Featuring Tony Padilla. Check https://brilliant.org/numberphile for Brilliant and get 20% off their premium service (episode …
This is why you should always visualize your data! Anscombe quartet https://en.wikipedia.org/wiki/Anscombe%27s_quartet Same …
Ben Sparks continuing from Part 1, which is at: https://youtu.be/FkVe8qrT0LA Go deeper with Ben’s explanation at …
Thanks to Aditya for the suggestion! A version of this problem given to students in class 10 in India (ages 14 – 17). Thanks to Tony …
Featuring Ben Sparks. See part 2 at https://youtu.be/l5gUrDg01cQ More links & stuff in full description below ↓↓↓ Ben Sparks …
This is one of those deceptively hard questions. It is easy to figure out the answer, but it is nearly impossible to prove there are no …
Marcus du Sautoy on the clever use of mathematics to generate poetry… Episode sponsored by Backblaze online back-up – more …
How many did you get correct? Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 Send me …
This is not the hardest question from the 2021 Fall AMC 12A, but it is a fun problem with a satisfying answer. 2021 Fall AMC 12A …
Tom Crawford shows us some cool things about Euler’s Formula… Check https://brilliant.org/numberphile for Brilliant and get 20% …
Move exactly 3 matchsticks to make the two sides equal. Source …
There’s an incredible method to calculate the square root of a perfect square in your head. MIT Entrace Exam Arithmetic 1876 …
Featuring Johnny Ball… And see more about the egg formula at https://youtu.be/tjyFw1BX4eM More links about Johnny & stuff in …
In 1880, James Garfield contributed a new proof of geometry’s most famous right triangle theorem. Mathematical treasure: …
This is a fun logic puzzle and one of the easier questions in Cambridge’s entrance exam (source of puzzle: told by email).
Complex patterns seen in nature can be generated from relatively simple equations and a golden angle. Song credits Song: …
This is a standard question to prepare for India’s famously challenging JEE Advanced exam. Here is one way to solve the …
This is a visual way to understand Brahmagupta’s quadratic formula. #Shorts Song Credits Song: Kajra Re Singers: Alisha Chinai, …
Featuring Tadashi Tokieda… Get 60% off your first box from MEL Science at https://melscience.com/sBEz/ and use code …
Thanks to Dhrubajyoti for the suggestion! A similar problem was asked to class 10 students in India. I admit that this one stumped …
With Ben Sparks… Check https://brilliant.org/numberphile for Brilliant and get 20% off their premium service (episode sponsor) …
A magic square is a grid of numbers where every row, column, and diagonal has the same sum. Ancient Chinese mathematicians …
Large factorials and the use of Stirling’s Approximation. Featuring Professor Ken McLaughlin. More links & stuff in full description …
Thanks to Ryan from India for the suggestion! Two candles of equal height but different thickness are lit. The first burns off in 8 …
Thanks to Moaaz for the suggestion! Can you solve this challenging geometry problem? 0:00 Problem 0:55 Solution 1 3:09 …
Happy Pi Day! Sato Moshun and Leonardo da Vinci independently devised an incredible visualization to find the formula for a …
Matt Parker explores the work of William Shanks – and boots up the ShanksBot. More links & stuff in full description below …
Happy Pi Day! In the 12th century, Rabbi Abraham bar Hiyya discovered a stunning visualization of a circle’s area. #shorts Area of …
Leibniz is credited as one of the inventors of calculus, but this simple probability question tripped him up. If you roll two dice, is a …
Cliff Stoll – the King of Klein Bottles – shows us more designs, including the Coke Klein Bottle… Full Klein Bottle Playlist: …
Thanks to Victor for the suggestion! A version of this problem appeared on a Kangaroo math competition for 12-13 year olds.
The equation 6171 = 101 is written in dots, and you have to remove 3 dots to make the two sides equal. How can you do it?
Thanks to Amit from India for the suggestion! A circle is tangent on the exterior of a side of a triangle and tangent to the lines …