Question from Twyla:

How many different ways can cards fall when shuffling? In other words, if you have 52 numbers, each one unique, how many different ways can they be arranged, using each number only once? Looking for a formula as well as the answer. Thanks!

Hi Twyla,

Have a look at http://nrich.maths.org/public/viewer.php?obj_id=5402. 52! is about 8x10^{67} and by comparison the number of cubic centimeters in the observable universe is estimated at about 10^{80}.

Penny