PlaySudoku.us
Hard · Puzzle #470
5
8
2
2
6
1
8
7
5
9
2
6
9
5
8
6
4
8
2
1
7
3
3
8
9
5
1
4
"Mathematics is not about numbers, equations, or algorithms — it is about understanding." — William Paul Thurston
"Mathematics is not about numbers, equations, or algorithms — it is about understanding." — William Paul Thurston
"Mathematics is not about numbers, equations, or algorithms — it is about understanding." — William Paul Thurston
"Mathematics is not about numbers, equations, or algorithms — it is about understanding." — William Paul Thurston