Rubik's Cube - 4x4
The Rubik's Revenge (also known as the Master Cube) is the 4x4x4 version of the famous 3x3 Rubik's Cube. The puzzle is made up of 56 small cubes on the surface. However, unlike the 3x3 puzzle the centre pieces can move in relation to each other, making it even more difficult to solve!!
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