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

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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!


Age 7 to 11 Challenge Level:

A game has a special dice with a colour patch on each face.

These three pictures show different views of the same dice.

What colour is opposite Blue?

new dice