Riddle: Hannah became very tired while driving. She decided to stop at a nearby two-story hotel and stay there for the night. The receptionist said that her hotel room number is 604; he even offered to show Hannah where it was. Hannah didn't believe him; she rushed back to her car, hopped inside, and sped away. Why?
Answer: The first digit of a hotel room number usually indicates the floor it is on. Room 604 is supposed to be on the sixth floor, but the hotel only has two floors.