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 has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Can you Find and name the hidden bird in the picture below ?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?