What will you call your mother's brother's brother-in-law?

The more of this there is, the less you see. What is it?

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.

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Before Mount Everest was discovered, what was the highest mountain in the world?

Which city is three-fifths chick two third cat and 50% goat?