Riddle

A warden toggles 100 jail cells in a complex mathematical pattern. Which cells stay open?

Choose an answer

A.Clock arithmetic
B.A calculator error
C.Daylight savings
D.Cells 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100
Hint: It's a 2-word phrase with 8 letters, starting with "C".

Answer

Cells 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100

Why this is the answer

This is a lateral thinking puzzle where the solution relies on a non-obvious interpretation of the words used.

This riddle is filed under Expert Riddles for Adults and rated Hard.