How can a man go eight days without sleep?

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.

What runs around the whole yard without moving?

Spot the cat in the picture below

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you count the number of quadrilaterals in the picture below?

Which Burger Is Different in below image?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?