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Construct-o-straws

Make a cube out of straws and have a go at this practical challenge.

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Matchsticks

Reasoning about the number of matches needed to build squares that share their sides.

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Tangram Paradox

How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!

Child's Play

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

How many faces can you place down into the hollows?

How many ways can you turn the pieces round?