Here are a bunch of puzzles related to squares. For each puzzle you see a rectangle cut into squares, but the squares don't have to be the same size. Consider this first one.
How can you assign sizes to the squares so they fit together to make a rectangle?
1999. This page may be printed for classroom use.
David E. Joyce
Department of Mathematics and Computer Science
Worcester, MA 01610
The address of this file is http://aleph0.clarku.edu/~djoyce/puzzles/square1.html