PlaySudoku.us
Hard · Puzzle #236
5
2
6
3
9
1
9
3
7
4
6
4
8
1
2
3
2
9
5
6
9
4
3
2
9
3
5
"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