![Image](https://i.ibb.co/sCg7VQg/Selection-440.jpg)
Take three square pieces of card, sizes 12 inches, 15 inches and 16 inches. Since 12^2 + 15^2 + 16^2 = 144 + 225 + 256 = 625 = 25^2, it is tempting to wonder if, with suitable cuts, these pieces could be re-arranged to form a square of size 25. At one extreme you could cut 625 unit squares and re-arrange them. But in this puzzle you are asked to make appropriate cuts and re-arrange just six pieces to form a big square.
Cinelli