The Four 4s - Numberphile





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Published on Feb 6, 2017

It was a famous problem for many years - until a physics genius solved it all the way to infinity.
Featuring author Alex Bellos - more links below.

Extras from this interview: https://youtu.be/jv8dITbiheQ

More Numberphile videos with Alex: http://bit.ly/Bellos_Playlist

Alex's recent book about puzzles (including the Four 4s): http://amzn.to/2jRo0n2
More Alex books: http://bit.ly/BellosBooks

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Videos by Brady Haran

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