Enigma 1511 — Way outby Bob WalkerMany years ago, Joe mode a 3-foor-wide path from his back door to his garden shed, using whole 2-foot by 1-foot paving slabs. Viewed from his back door, he wanted to ensure that the pattern of slabs in any 2-foot-long section of the path was not duplicated. This limited the length of the path, so he had to move his shed a little nearer to the house! How long was Joe’s path? |