# Math

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 …

Featuring Marcus du Sautoy discussing polyhedra and the art of Conrad Shawcross… More links & stuff in full description below …

This is a math joke from Wikipedia’s article on mathematical fallacies: https://en.wikipedia.org/wiki/Mathematical_fallacy#Howlers …

Thanks to Haoyu from China for the suggestion! A version of this problem was asked to 14 year old students. Subscribe: …

Thanks to Arber for the suggestion! If AB = AC = AD and BAC = 50 degrees, what is the measure of BDC? This is a nice geometry …

This is so amazing that I didn’t believe it was true. But it is a perfectly valid method and I had some fun working out its proof.

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: …

With Thomas Woolley… Check https://brilliant.org/numberphile for Brilliant and get 20% off their premium service (episode …

A semicircle contains an inscribed semicircle dividing its diameter into two lengths a and b. Can you find the formula for the …

What is the least number of critical points of the function f? #shorts Source https://twitter.com/eloto_/status/1389322344712179715 …

Matt Henderson lets his plotter loose on Pi. This plotting extravaganza follows on from this earlier video: …

This the first or two parts with Matt Henderson and his plotter – more *very* soon. More links & stuff in full description below …