PlaySudoku.us
Medium · Puzzle #656
5
5
6
1
9
3
4
2
7
6
2
3
6
6
3
2
4
9
1
3
8
7
6
8
9
3
1
4
3
7
8
"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