How to play: There are two players, and the first play the 1st digit of pi, then the next play the 2nd digit of pi, and so on. (no decimal point) To win the game, you must have 0 cards. If you have a card you can't play, you must draw from the deck. Your turn is skipped if the card you drew isn't the number you have to place. If the card you drew is the card you must put in, you play it automatically. #'s are cards that can be placed an represented as the required number.
Credit to my math teacher with this idea.