I just got into card tricks that involve math to create magic. My best one is one in which you have someone pull all four Ace's out of the deck using numbers without either of you looking at the bottoms of the cards. And up until a week ago it was one of my best card tricks. That was until my assistant thought that it was okay to teach it to my visiting Uncle from Florida. Who then proceeded to teach it to everyone and their mother how to do it. In other words anyone know a trick that uses math to create magic? Since i'm as of now still working on the whole sleight of hand with cards thing.