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Hard · Puzzle #631
9
5
7
1
9
6
7
3
1
8
6
3
9
6
7
2
1
5
7
4
6
8
3
2
8
7
6
4
"A problem well stated is a problem half solved." — Charles Kettering
"A problem well stated is a problem half solved." — Charles Kettering
"Think for yourself and let others enjoy the privilege of doing so too." — Voltaire
"Think for yourself and let others enjoy the privilege of doing so too." — Voltaire