9
7
6
5
7
6
1
9
3
8
6
5
7
5
9
3
2
7
5
1
9
8
6
4
5
2
4
9
5
6
4
3
2
3
1
9
There are 6,670,903,752,021,072,936,960 valid completed Sudoku grids — that's 6.7 sextillion.
There are 6,670,903,752,021,072,936,960 valid completed Sudoku grids — that's 6.7 sextillion.
There are 6,670,903,752,021,072,936,960 valid completed Sudoku grids — that's 6.7 sextillion.
There are 6,670,903,752,021,072,936,960 valid completed Sudoku grids — that's 6.7 sextillion.