Alta
zach bender made a comment in another thread which I just read, and it sparked something that I had been meaning to share and get the opinions of others.
This is from Sedi's thread, "Returning cards to the deck":
So yes, the 'inner scientist' in me had to try this. Several times with several decks over time.
I took a completely ordered deck and riffle shuffled it seven times. Then I went through the deck to check for any pairs. Every single time there were at most 3 pairs left, usually two. Now I am weaker on stats but am willing to bet that statistically there is always at least one and possibly two pairs in any deck regardless of its state of shuffling.
Anyone else care to share what they may do to feel sure in their own mind that the deck is ready for action?
M
This is from Sedi's thread, "Returning cards to the deck":
I also read this quite a while ago and have experimented several times. The actual statement was that 7 riffle shuffles with completely randomize an ordered deck. I think the article was about poker or something, not tarot.there is math somewhere that says maybe eight or so "riffle" shuffles will restore randomness.
zb
So yes, the 'inner scientist' in me had to try this. Several times with several decks over time.
I took a completely ordered deck and riffle shuffled it seven times. Then I went through the deck to check for any pairs. Every single time there were at most 3 pairs left, usually two. Now I am weaker on stats but am willing to bet that statistically there is always at least one and possibly two pairs in any deck regardless of its state of shuffling.
Anyone else care to share what they may do to feel sure in their own mind that the deck is ready for action?
M