This is a fun little geometry puzzle! adapted from a puzzle by @Cshearer41 …

# Math

Featuring Professor Hannah Fry – more details on her work below. Check out Brilliant (get 20% off their premium service): …

This is one way mathematicians can wish a Happy Valentine’s Day. Math class with Whitney Houston – I Will Always Love You.

Parker Square: https://www.youtube.com/watch?v=aOT_bG-vWyg.

Solve this to get into Oxford! 2021 Oxford MAT Questions https://www.maths.ox.ac.uk/system/files/attachments/test21.pdf 2021 …

Featuring Asaf Karagila. More links & stuff in full description below ↓↓↓ Asaf is a UKRI Future Leaders Fellow. Asaf’s blog …

Not everyone knows this simple method to convert kg and lbs quickly in your head! #Shorts Reference …

Thanks to Umesh for the suggestion! If the large circle has a radius equal to 1, what is the radius of each small circle? Subscribe: …

Another curious puzzle and number sequence from Neil Sloane. More of our videos with Neil: http://bit.ly/Sloane_Numberphile …

Sir James Hopwood Jeans developed this simple way to remember pi nearly one hundred years ago. #shorts References …

I bet this one will give many adults a good challenge too. Thanks to Pett for the suggestion! Special thanks this month to: Kyle, …

The secret to pizza’s name origin is mathematics, or so the legend goes… #Shorts Images …

This is a fun little geometry problem! Wait But Why tweet crediting Cshearer41 …

Featuring Cliff Stoll – http://bit.ly/Cliff_Videos More links & stuff in full description below ↓↓↓ Cliff’s website: …

Versions of this puzzle have gone viral on the internet. The puzzle stumps adults but is surprisingly easy for many children.

Featuring Grant Sanderson, creator of 3blue1brown. Extra footage from this interview: https://youtu.be/pJyKM-7IgAU 3blue1brown …

This equation has a secret meaning. #shorts Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 …

Featuring Dr James Grime. More links below. Check out Brilliant (get 20% off their premium service): …

Featuring Neil Sloane. Visit https://gift.climeworks.com/numberphile to give the gift of CO₂ removal. Use code NUMBERPHILE10 …

Thanks to Tanmay for the suggestion! And do check out Tanmay’s channel Mr. Whiteboard for mathematics videos in Hindi: …

What kind of magic is this?! #shorts.

Professor Tony Padilla discusses the Greek letter Omicron. More links & stuff in full description below ↓↓↓ More Numberphile with Tony: …

Thanks to John H. for the suggestion! A square is inscribed in a quarter circle with two of its vertices on the arc. If the radius equals 1, what is the area of the …

Ayliean MacDonald discusses Hitomezashi Stitch Patterns. More links & stuff in full description below ↓↓↓ More about Ayliean MacDonald: …

Thanks to Amish for the suggestion! This is a tricky one from India’s challenging JEE Mains test. Can you figure it out? Subscribe: …

Featuring Matt Parker – more Parker links below. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links …

Recently Russia’s Prime Minister Mikhail Mishustin visited 11th grade students (about 17-18 years old) and asked them a challenging geometry problem.

Featuring Hannah Fry discusses Train Graphs. More links & stuff in full description below ↓↓↓ Hannah’s website, including links to her many and varied …

Featuring Matt Henderson. Check out https://www.kiwico.com/Numberphile and get 50% off your first month of any subscription. (sponsor) More links & stuff in …

A challenging problem was posted to Reddit HomeworkHelp and it was said to be given to gifted 8 year old students. Can you figure it out? Reddit …

Featuring the friendless number 10 for our 10-year anniversary… James Grime is back where it all began. More links & stuff in full description below …

This problem is adapted from the 2021 Bangladesh Mathematical Olympiad (BDMO). I thank Mumtahina for the suggestion! Subscribe: …

This one stumped me at first. Can you figure it out? Thanks to Gusti for the suggestion! Special thanks this month to: Daniel Lewis, Robert Zarnke, Fiona Harper, …

Featuring James Grime. Check out https://www.kiwico.com/Numberphile and get 50% off your first month of any subscription. (sponsor) More links & stuff in full …

Featuring Ayliean MacDonald… Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full …

Imagine being stuck on a math problem and then having Albert Einstein help you out. For one lucky student in 1952 this actually happened! 0:01 Problem 2:28 …

This is a tricky question from Singapore’s PSLE. I don’t think I would have solved it easily in a timed exam. So let’s work it out carefully in our own time. Thanks to …

The mathematical genius of JS Bach – featuring Marcus Du Sautoy. More links & stuff in full description below ↓↓↓ See books by Marcus, including his latest …

The imaginary number i is equal to the square root of negative 1. But if you raise i to the power of i, you get a very real number, equal to about one fifth. This is …

Tom Crawford shows why water doesn’t fall through a sieve with small enough holes. More links & stuff in full description below ↓↓↓ Tom Crawford’s website, …

Thanks to Jumar for the suggestion! Can you solve this interesting geometry problem? 0:00 Problem 1:10 Similar triangles 2:29 Solution Subscribe: …

Matt Parker introducing Finite Fields and re-visits the infamous Parker Square… Extra footage & become a millionaire by winning The Parker Prize: …

This problem is adapted from a national math competition exam in France. Special thanks this month to: Michael Anvari, Robert Zarnke, Fiona Harper, Kyle, …