One of the world's top puzzle- and game-makers compiled this visually stunning assortment of 86 mathematical challenges. Designed to promote creative thinking a

Presents a collection of puzzles that demonstrate the principles of mathematics.

A treat for the eye as well as the mind,these beautifully designed and intellectuallystimulating challenges werecreated by one of the world’s mostinnovative p

Presents a collection of puzzles that demonstrate the principles of mathematics.

A colorful square, dissected into four parts, with hinges marked in black. If you leave the blue piece fixed and swing the others around their hinges, a new sha