PlaySudoku.us
Easy · Puzzle #420
2
5
9
3
7
5
4
2
4
3
1
8
9
6
2
4
8
5
4
5
7
9
6
8
8
5
9
6
7
5
6
9
3
4
1
8
9
5
3
7
2
1
8
9
5
The Times of London received so many reader letters about Sudoku in 2004 that they had to hire extra staff to handle them.
The Times of London received so many reader letters about Sudoku in 2004 that they had to hire extra staff to handle them.
"Mathematics is the art of giving the same name to different things." — Henri Poincaré
"Mathematics is the art of giving the same name to different things." — Henri Poincaré