Arnold Schwarzenegger has a big one,
Michael J Fox has a small one,
Madonna doesn't have one,
The pope has one but he never uses it,
Bill Clinton has one and he uses it all the time!
What is it?
Answer: The surname.
This riddle appears in the following downloadable PDF files:
Can you solve one of the most famous logic puzzle ever?
Memory Matching game for kids, adults and seniors.
Connect the matching tiles and pop them all.