Why do we preferably have round manhole covers and not square ones?

Which number should replace the question mark?

What time is it when an elephant sits on a fence?

The cream is heavier than Milk. True or False?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

John was piloting a plane behind a car but was never able to overtake it. Why?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

How many letters are in the alphabet?