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Hard · Puzzle #345
3
7
6
9
4
4
5
4
8
6
2
7
3
4
9
1
7
1
8
9
2
1
6
8
3
7
4
1
"Invention is the most important product of man's creative brain. The ultimate purpose is the complete mastery of mind over the material world." — Nikola Tesla
"Invention is the most important product of man's creative brain. The ultimate purpose is the complete mastery of mind over the material world." — Nikola Tesla
"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