#16:   How many Sudoku puzzles are there?

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#16:   How many Sudoku puzzles are there?

There are a total of 6,670,903,752,021,072,936,960 possible solutions, yet when mathematicians took away rotations, reflections, permutations and relabeling, which takes away the same puzzle in just a different form, the number of solutions was 5,472,730,538.

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