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Math explains the best way to shuffle a deck of cards and why

Everyone who has played poker or even Go Fish knows the basics of shuffling cards. There's the riffle shuffle (combining two halves of a decks and making a bridge), overhand shuffling (quickly splicing cards from the deck back into the deck) and regular ol' mixing all the cards up on a table. Which way is the best? » 3/23/15 7:36pm 3/23/15 7:36pm