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Hard · Puzzle #690
1
4
7
9
6
9
8
3
4
6
5
8
5
2
4
1
9
8
4
7
2
7
6
4
2
9
"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