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Hard · Puzzle #525
9
4
1
7
2
4
2
5
8
7
2
4
8
8
4
7
5
9
3
4
5
1
7
9
8
2
9
3
"The important thing is not to stop questioning. Curiosity has its own reason for existing." — Albert Einstein
"The important thing is not to stop questioning. Curiosity has its own reason for existing." — Albert Einstein
"Research is to see what everybody else has seen, and to think what nobody else has thought." — Albert Szent-Györgyi
"Research is to see what everybody else has seen, and to think what nobody else has thought." — Albert Szent-Györgyi