How many shuffles do you need to randomize a 100 card deck?

So if you’re playing a 60-card Modern deck, riffle at least eight times (though you could probably get away with 7, still). If you’re playing a 100-card EDH deck, riffle at least ten times. If you’re playing a 500,000-card monster deck, riffle at least 28 times.

How many perfect shuffles does it take to reset a deck of cards?

The result in that cell is 8, which is the number of perfect shuffles required to restore a 52-card deck to its original order.

How much shuffling is enough?

Jim Reeds at Bell Laboratories and showed that a deck is perfectly mixed if it is shuffled between 5 and 20 times. Next, Dr. Diaconis worked with Dr. Aldous and showed that it takes 5 to 12 shuffles to perfectly mix a deck.

How many mash shuffles are there?

If you’re playing a 60 card format 7 riffle/mash shuffles are sufficient. If you’re playing commander which uses 100-card decks, you’ll need to riffle shuffle 9 times to be randomized enough. Shuffling more does make the deck more random, but 7 (or 9) iterations is enough in practice.

How many card shuffles are there?

In 1992, Bayer and Diaconis showed that after seven random riffle shuffles of a deck of 52 cards, every configuration is nearly equally likely. Shuffling more than this does not significantly increase the “randomness”; shuffle less than this and the deck is “far” from random.

How do I make sure my card is shuffled?

Use your thumbs to draw the corners upward, draw the two halves of the deck closer together, then let the cards fall—like a regular shuffle, but only using a small corner of the deck. The very corners of the cards should now be shuffled together. Push the interconnected cards back together, square the deck, and repeat.

How many different combinations can a deck of cards be shuffled?

The total number of different shuffles you can have is: 52! That’s 52 factorial, which is 52 x 51 x 50 x 49… all the way down to 1. So there isn’t enough space on earth to layout every possible shuffle.