Pythagoras Mahjong

Pythagoras Mahjong is a classic mahjong solitaire where the tiles show arithmetic instead of hieroglyphs. A free tile is removed together with a tile of the same value: 3 and √9, 6 and 12/2, 8 and 2x5-2. While you clear the board, you quietly train your mental arithmetic — addition, subtraction, multiplication, division and square roots.

Three modes: • Relax — no timer, no limits. Play at your own pace and reshuffle the board whenever you run out of moves. • Adventure — 100 levels of smoothly growing difficulty: different board shapes (diamond, cross, rectangle, classic pyramid), more layers and trickier expressions. • Prodigy — the same 100 levels, but against the clock and with the hardest expressions. For those who count faster than a calculator.

Hints, board reshuffle, a tiles-left counter and a total score for every level you beat. Progress is saved automatically. A great brain workout for kids and adults alike.