Riddle

What is the thing that stays the same size, but the more it's used the more it decreases?

Choose an answer

A.Soap
B.Candle
C.Pencil
D.Iron
Hint: It's a word with 4 letters, starting with "I".

Answer

Iron

Why this is the answer

The source lists 'iron' as the answer here, though the description of shrinking with use actually fits an item like a bar of soap far better; this appears to be a weak or mismatched answer in the original worksheet, which we retain as given.

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