MathDice: The Fast Fun Game of Mental Math To play: 1. Roll two 12-sided dice. Multiply the two numbers together. That is the TARGET NUMBER. 2. Roll three 6-sided dice. 3. The winner is the first player to combine the three d6 in any way to match - or come closest to - the TARGET NUMBER. You can use each dice only once in the equation. Game includes the five dice, cloth bag, and an instruction booklet with these practice tables: addition/subtraction, multiplication, division, powers, and roots. This game was invented by a sixth-grader as a "Design a Game" math workshop project. Recommended for elementary age through adult.