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Put $10$ counters in a row.
Find a way to arrange the counters into five pairs, one on top of another, evenly spaced in a row so that they look like this:
A counter can only be moved by picking it up, jumping over two counters and landing on another counter.
Can you do it in just five moves?
This practical challenge invites you to investigate the different squares you can make on a square geoboard or pegboard.
This activity investigates how you might make squares and pentominoes from Polydron.
If you had 36 cubes, what different cuboids could you make?