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Expert · Puzzle #670
9
8
6
1
2
5
3
4
1
4
9
1
7
3
6
1
9
2
7
8
3
1
6
8
Puzzle-solving is used as therapy for anxiety: the focused concentration it requires quiets the mind's rumination.
Puzzle-solving is used as therapy for anxiety: the focused concentration it requires quiets the mind's rumination.
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding." — William Paul Thurston
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding." — William Paul Thurston