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.

Can you count the number of children in the picture below

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

If an electric train is travelling south, then which way is the smoke going?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

I look at you, you look at me I raise my right, you raise your left. What am I?

I make two people out of one. What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?