The tiling of a 6x10 rectangle by means of the 12 different pentominos [Le pavage d'un rectangle 6x10 par les 12 pentaminos différents].
A pentomino is a polygon made of five squares, each pair sharing a common side.
There are 12 different pentominos and using rotations and symmetries they can tile certain rectangles. For example
there are 2339 ways of tiling a 6x10 one! This picture displays one of these solutions.
By the way, one can find a reference to this puzzle in Imperial Earth published by Arthur C. Clarke in 1975...
(CMAP28 WWW site: this page was created on 05/29/2026 and last updated on 05/29/2026 19:59:31 -CEST-)