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Hard · Puzzle #800
4
3
6
1
8
2
7
5
8
1
7
2
3
9
1
8
6
9
8
9
4
3
1
3
9
8
3
"I hear and I forget. I see and I remember. I do and I understand." — Confucius
"I hear and I forget. I see and I remember. I do and I understand." — Confucius
"Young man, in mathematics you don't understand things. You just get used to them." — John von Neumann
"Young man, in mathematics you don't understand things. You just get used to them." — John von Neumann