Owlet puzzle #84
Released Sunday, September 27, 2026 UTC
11
the answer for puzzle #84
The five clues
- A two-digit prime below 20.
- A two-digit prime whose digits are the same.
- The two-digit palindromic prime, and also a repunit.
- It is the second repunit (11 = R₂), and the sum of its digits equals 2.
- The number of players on a soccer team.
Backstory
The smallest two-digit prime and a palindrome — also the 5th Lucas number (L_5 = 11) and the smallest repunit prime, R_2. Eleven first divides F_{10} = 55, so every tenth Fibonacci number is a multiple of 11.
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