A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside.
The man said, "Oh! I am really sorry, I thought this was my room."
He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man.
What made her suspicious of that man? He might have been genuinely mistaken.

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Different lights make me strange by changing me into different sizes. What am I?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What time is it when an elephant sits on a fence?

Spot what is wrong here in below Picture?

Can you make four (4) nines (9) equal 100?

Who always enjoys poor health?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?