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Hard · Puzzle #393
6
1
2
3
4
5
3
4
7
1
6
4
6
6
7
8
1
3
9
5
1
7
5
3
2
9
8
6
"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
"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