Riddle

Dean Sam and Castiel are three brothers. Interestingly their current age is prime. What's more interesting that difference between their ages is also prime. How old are they?

Choose an answer

A.2, 3, and 5
B.3, 5, and 7
C.2, 5, and 11
D.Sam is 2, Dean is 5, and Castiel is 7. The age differences (5-2=3, 7-5=2, 7-2=5) are all prime numbers.
Hint: It's a 17-word phrase with 58 letters, starting with "S".

Answer

Sam is 2, Dean is 5, and Castiel is 7. The age differences (5-2=3, 7-5=2, 7-2=5) are all prime numbers.

Why this is the answer

Ages 2, 5, and 7 are all prime numbers, and the differences between them - 3, 2, and 5 - are also all prime, satisfying every condition in the riddle.

This riddle is filed under Math Riddles and rated Hard.

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