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Owlet puzzle #21

Released Sunday, July 26, 2026 UTC

The five clues

1. A three-digit number.
2. The number of hours in a week.
3. The order of the smallest nonabelian simple group after A₅.
4. PSL(2,7) has order 168.
5. Also π(1000) = 168: the number of primes below 1000.

Backstory

Two coincidences: 168 hours per week AND 168 primes under 1000. Also |PSL(2,7)|.

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