The Best (and Worst) Ways to Shuffle Cards - Numberphile
Persi Diaconis (Stanford University) on card shuffling. See full description for links to additional videos and detailed papers. More links & stuff in full description below ↓↓↓ EXTRAS...
========== Question isHow many times do you have to shuffle the cards - a deck of cards - to mix it upI mean by shuffling probably what you mean by shufflingCut 'em about in half; you go like that; you push 'em togetherRight and how many times do you have to do that til the cards get all mixed upand uhh..There's a practical answerThe answer's about 7And uh.. And it's not "I think it" or "it feels that way"It's a theoremIn contrastThere's another way that people shuffle cardsUh.. They shuffle cards this wayYou've seen people shuffle cards that way(Brady: That's how I shuffle cards)Ok well uh..And in India, they do it this wayIt's the same - you can see it's ...