About Calculation
A thinking patience: four foundations count up by ones, twos, threes and fours, and you decide where every card waits.
How to play Calculation. Foundations start A, 2, 3, 4 and count up by 1, 2, 3, 4 (suits don't matter) to King. Place each stock card on a foundation or one of four waste piles.
Tags: solitaire, math, cards, brain