This practical challenge invites you to investigate the different squares you can make on a square geoboard or pegboard.
How many ways can you find of tiling the square patio, using square tiles of different sizes?
Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?
Tarusha and Sumona sent in this attractive set of solutions.
It's very picturesque but it shows that it can be hard to link squares to the grid, on a computer.