Owlet puzzle #86
Released Tuesday, September 29, 2026 UTC
25
the answer for puzzle #86
The five clues
- A two-digit perfect square.
- A two-digit square of a single-digit prime.
- The sum of the first five odd numbers: 1 + 3 + 5 + 7 + 9.
- Equal to 5².
- The value of a U.S. quarter in cents.
Backstory
25 = 5². The square of the third prime, and a Pythagorean hypotenuse (in both the 7-24-25 and 15-20-25 triples). A curiosity: 25 = 3² + 4², a sum of two consecutive squares. It's the smallest square that is a sum of two nonzero squares, from the Pythagorean identity 3² + 4² = 5².
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