The Math of Card Shuffling \ stacker news ~science

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The Math of Card Shuffling fredhohman.com/card-shuffling/

462 sats \ 4 comments \ @kristapsk 7 Jul science

Hey, excellent article, very good example. I love playing cards.

Looks like I haven't been achieving randomness this entire time with cars. I only shuffle 3-4 times when playing - great share.

17 sats \ 0 replies \ @NRS 7 Jul

The article highlights the struggle between reliance on fiat currency and embracing Bitcoin as an alternative, noting that the former provides a false sense of certainty while the latter reflects courage and openness to risk.

It underscores the relativity and variability of value, urging acceptance of truth despite market fluctuations.

17 sats \ 0 replies \ @south_korea_ln 7 Jul

Here’s a question: how many times do you have to riffle a deck of cards before it is completely shuffled? It’s a tricky one, but math has us covered: you need seven riffles.

We can calculate the number of orderings of a deck of cards using the notion of a permutation. To find all arrangements of 52 cards in a deck, we compute 52!, which happens to be a really big number.

Riffle seven times and you’ll have a sufficiently random ordering of cards, an ordering that has likely never existed before. In other words, it’s unlikely you’ll ever shuffle two decks the same.

I didn't want to accept it the first time i heard it is extremely unlikely that a random shuffle is very unlikely to have existed ever before. The numbers are clear, it just didn't feel right.

Same with the 24 words consistently giving unique private keys for Bitcoin...