Riddle: A man wants to enter an exclusive club, but he doesn't know the password, so he watches the bouncer to figure it out. A woman comes up and the bouncer says, "12." The woman replies, "6." The bouncer lets her in. Another woman comes up and the bouncer says, "6." The woman says "3" and the bouncer lets her in. The man feels he's heard enough and goes up to the door. The bouncer says "10," and the man replies, "5." The bouncer tells him to get lost. What should the man have said instead?
Answer: : 3 — the number of letters in the word "ten."