8
4
5
6
8
6
7
4
5
2
9
1
5
4
7
3
8
5
1
1
2
9
8
3
9
2
7
2
9
6
3
1
4
2
7
8
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.