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Giant Rubik's Cube

Age 11 to 14 Short Challenge Level:

A Rubik’s cube is made of 3 by 3 by 3 smaller cubes – so 27 in total – but only 26 of them are visible.

How many cubes would be visible in a 12 by 12 by 12 Rubik’s cube?


This problem is adapted from the World Mathematics Championships
You can find more short problems, arranged by curriculum topic, in our short problems collection.