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Geoboards

This practical challenge invites you to investigate the different squares you can make on a square geoboard or pegboard.

Polydron

This activity investigates how you might make squares and pentominoes from Polydron.

Multilink Cubes

If you had 36 cubes, what different cuboids could you make?

Three by Three

Age 5 to 11 Challenge Level:

Fred from London gave this solution.


Are there any more solutions?
Did anyone try a 4x4?