article_snippet: Peri Diaconis compared different shuffling techniques and it seems that the 'riffle shuffle', which involves cutting a deck in half and shuffling the halves into each other, is the most time effective - if done well.
article_snippet: Peri Diaconis compared different shuffling techniques and said the 'riffle' shuffle (pictured), which involves cutting a deck in half and shuffling the halves into each other, is the most effective and random if done well .
article_snippet: In a Numberphile YouTube video, a mathematician said that if a dealer uses a riffle shuffle, they only need to repeat the process seven times to get a good mix.
article_snippet: If a dealer uses a riffle shuffle, they only need to repeat the process seven times to get
article_snippet: But if a dealer uses a riffle shuffle, they only need to repeat the process seven times to get a good mix use a flashier overhand shuffle, which involves quickly inserting random chunks of cards from one hand into the majority of the deck of cards held in the other, a dealer uses a riffle shuffle, they only need to repeat the process seven times to get a good mix will need to do it 10,000 times to achieve similar results.
article_snippet: If a dealer uses an overhand shuffle (pictured), which involves quickly inserting random chunks of cards from one hand into the majority of the deck of cards held in the other, they will need to do it 10,000 times to achieve similar results to the riffle shuffle .
highlights_snippet: Dealers using a 'riffle' shuffle need to repeat the process seven times to get a random pack of cards, said Peri Diaconis .
  