Out of the Box Publishing, Inc. 7 ATE 9 - Fast and Fun Number Crunch'n
It’s as easy as 1, 2, 3. Players add, or subtract, 1, 2, or 3 to the number on the top card on the pile to determine if they have a card that can be played next. Sounds simple, but with everyone playing simultaneously, the options are constantly changing. The first player out of cards wins.