PlaySudoku.us
Medium · Puzzle #540
3
7
2
1
8
8
5
7
9
5
9
6
7
2
8
3
3
1
6
4
5
3
3
4
9
6
8
9
6
2
4
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding." — William Paul Thurston
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding." — William Paul Thurston
"Pure mathematics is, in its way, the poetry of logical ideas." — Albert Einstein
"Pure mathematics is, in its way, the poetry of logical ideas." — Albert Einstein