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.

Name a key which is hardest to turn.

How can one talk without saying a single word?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

John was drowned by he was not wet. How?

There are forty elephants and they have forty-fore heads. How can this be possible?

The dirtier I get, the whiter I look. Who am I?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag