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Evil · Puzzle #812
7
4
5
8
1
7
2
1
7
3
6
8
6
8
5
7
4
9
8
1
7
5
4
3
"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