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Rubik's cube
Rubik's Cube has 43,252,003,274,489,856,000 different possible configurations. One, and only one, of these possibilities presents the 'solved' Cube, having a single color on each of its 6 sides. If you allow one second for each turn, it would take you 1400 million million years to go through all the possible configurations. In comparison, the whole universe is only 14 thousand million years old.
If every permutation of a 57-millimeter Rubik's Cube were lined up end to end, it would stretch out approximately 261 light years. If they were laid side by side, it would cover the earth approximately 276 times.
It is not known how many moves is the minimum required to solve any instance of the Rubik's cube. But it has been proven that all cubes can be solved in 25 or fewer moves.
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Rubik's cube