Riddle

I cycle for many hours but never get tired.

Choose an answer

A.A surfer
B.A pilot
C.A carpenter
D.A clock
Hint: It's a 2-word phrase with 6 letters, starting with "A".

Answer

A clock

Why this is the answer

This logic uses 'clock arithmetic'. On a standard 12-hour clock, adding 5 hours to 9:00 results in 2:00.

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