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This is Numberphile. We mainly post videos about mathematics and just numbers in general.

Looking at Perfect Shuffles

Looking at Perfect Shuffles

Brady Haran
Federico Ardila, Cards
Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

How do cards move in a perfectly shuffled deck.

This continues on Numberphile2 at: http://youtu.be/UawZn7X42OM (including a look at 52 card decks)

Featuring Federico Ardila from San Francisco State University.
Federico: https://twitter.com/FedericoArdila

More cards and shuffling videos: http://bit.ly/Cards_Shuffling

52-Card Perfect Shuffles

52-Card Perfect Shuffles
The Best (and Worst) Ways to Shuffle Cards

The Best (and Worst) Ways to Shuffle Cards