Riddle

What happens every second, minute, month, and century, but not every hour, week, year, or decade?

Choose an answer

A.The letter M
B.The letter E
C.The letter T
D.The letter N
Hint: It's a 3-word phrase with 10 letters, starting with "T".

Answer

The letter N

Why this is the answer

The letter N appears in "second," "minute," "month," and "century," but not in "hour," "week," "year," or "decade."

This riddle is filed under Hard/Difficult Riddles and rated Medium.