Shuffling Card Trick

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...

Jason Davison shows us a cool card trick using the so-called Gilbreath Principle.

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More card videos from Numberphile: http://bit.ly/Cards_Shuffling

Jason's website: http://davisonmagic.com