pyramathPyramath from I See Cards is the brainchild of engineering professor Ron Eaglin, who, when not teaching or inventing a card game, spends his time hiking, biking, and paddling through rough terrain and rapids.

Pyramath is a card game for 1 or 2 players. The cards are numbered 1 through 9, and you have to make a pyramid where any card on a row is the math result (+, -, *, or /, and mod 10) of the two numbers above it.

Cards also have the name of the number in six languages.