Here's the video: http://www.flixxy.com/math-magic-card-trick.htm Just the idea that the odd even of the up down never reveals the cards baffles me.. I gotta find a deck of cards! If you know don't blow it right away! Hints ok... Warren OK In the form of an edit... I can see how the 1st and last card are intentionally inserted into a slot that will always be 2 of the last 3 cards. But the 3rd is random. Isn't it?