Crosswords5 mins ago
suduko
2 Answers
how many possible 9x9 suduko grids can there be ....there has to be a definite answer ....or not ?
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9 to the power of 9 I guess minus repetitions (sorry, that could be completely wrong, maths isn't my specialist subject). But each one could then be presented in many different ways - ie with different numbers already there. So...ermm.... well, enough to last my lifetime, anyway.
You might get a more authoritative answer if you posted this under Quizzes & Puzzles, all you get here is Big Brother and Lemony Snicket stuff.
Have a look here:
http://en.wikipedia.org/wiki/Sudoku#Mathematics_of_Sudoku
If you scroll down to Contents / 7 Mathematics of Sudoku, you will find the answer (6,670,903,752,021,072,936,960 )
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