Rubik's Revenge / Master Cube / 4x4x4 Rubik's cube.

The Rubik’s Cube 4x4 (also known as the Rubik’s Master Cube) is a 4x4x4 version of the classic Rubik’s Cube. The 4x4 Rubik’s Cube is the bigger and bolder version of its 3x3 and 2x2 little brothers.

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