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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?

Number Sandwiches

Age 7 to 14 Challenge Level:

Using digit cards may help you to test different arrangements.
You could start by positioning the 3s, and then see where the 1s and 2s could fit...