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Hard · Puzzle #61
9
1
8
5
7
9
4
8
3
2
1
6
9
4
1
9
7
6
3
1
9
7
3
2
5
7
"An investment in knowledge pays the best interest." — Benjamin Franklin
"An investment in knowledge pays the best interest." — Benjamin Franklin
"Beauty is the first test: there is no permanent place in the world for ugly mathematics." — G. H. Hardy
"Beauty is the first test: there is no permanent place in the world for ugly mathematics." — G. H. Hardy