

ekgdoc New user 67 Posts 
I've told people that there are more ways to arrange a deck of 52 cards than there are number of atoms in the universe. Few believe me, but I believe it's true. The conditions I use for counting are (1) a face up card is different than a face down card (cards can be face up or face down), and (2) the order of face down cards matters (i.e., a different order of face down cards is a different arrangement). I calculate that the number of ways to arrange the cards under these conditions is (2^52) * (52!) = 3.63 x 10^83. According to a Google search, the upper limit for the number of atoms in the observable universe is 10^82. I find it remarkable that when you allow cards to be mixed face up and face down, the number of possibilities is so immense. I am hoping that someone can confirm my calculation.
David M. 
MeetMagicMike Inner circle Gainesville Fl 3078 Posts 
You should post this in the puzzle section. The smart math guys hang out there. I have heard that when a deck is well shuffled it is likely that no other deck has ever been in that same order.

Steven Keyl Inner circle Washington, D.C. 2500 Posts 
Steven Keyl  The Human Whisperer!
Come visit Magic Book Report.com! "If you ever find yourself on the side of the majority, it is time to pause, and reflect." Mark Twain 
MeetMagicMike Inner circle Gainesville Fl 3078 Posts 
It is not really necessary to add face up and face down. 52 factorial is large enough to dazzle.

Mike Powers Inner circle Midwest 2820 Posts 
If you google "the number of atoms in our galaxy" you'll find that it's about 1/3 of the way to 52! which is the number of ways to arrange the 52 cards in a deck. I used the reference Steven Keyl pointed to above in TESSSERACT to dazzle the reader with the incredible size of 52!.
SO 52! is not bigger than the number of atoms in the UNIVERSE. It's bigger than the number of atoms in our galaxy of two to four hundred billion stars. Our star, the sun, is about a million times the size of the earth. But check out Steven's reference. It's a mind blower. Mike
Mike Powers
http://www.mallofmagic.com 
dyoung Veteran user 358 Posts 
This is usually true, unless you see a Nine of Diamonds on the bottom. Then chances are they've been in that order before
//Dan 
Mike Powers Inner circle Midwest 2820 Posts 
Good one Dan!
Mike Powers
http://www.mallofmagic.com 
Greg Kiefer New user 24 Posts 
Dan’s quote usually goes over my head. I definitely think Juan Tamariz is smiling😀

Mike Powers Inner circle Midwest 2820 Posts 
Both Juan and Simon are smiling!
Mike
Mike Powers
http://www.mallofmagic.com 
Scott Kahn Special user Clayton, NC 771 Posts 
No! More ways to arrange a deck than there are atoms on EARTH.
Scott Kahn, M.D.
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Mike Powers Inner circle Midwest 2820 Posts 
Scott  do a google search on 52! and also on "number of atoms in the milky way galaxy." You'll see that there are more ways to arrange the cards in a deck (52!) than there are atoms in the entire galaxy of 200 to 400 million stars and all their planets etc.
Mike
Mike Powers
http://www.mallofmagic.com 
ipe Regular user 188 Posts 
What would a real mindreader do?

Mike Powers Inner circle Midwest 2820 Posts 
The reference above just says that 52! is bigger than the number of atoms in our solar system. Just do a google search on "the number of atoms in the milky way galaxy." The estimate is less than 52! This is an estimate. So it's correct to say that 52! is "in the vicinity of" the number of atoms in our 200 to 400 billion star galaxy. It's not the number of atoms in our sun or the earth or the solar system. That's not even close. It's off by a factor of hundreds of billions.
Mike
Mike Powers
http://www.mallofmagic.com 
The Magic Cafe Forum Index » » The workers » » Are there more ways to arrange a deck of cards than the number of atoms in the universe? (1 Likes) 
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