A plane crashed between the border of Mexico and America. Where do you bury the survivors?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Which fur should we be getting from the Lion?

What's the only room from which no one can enter or leave

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

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

Can you solve below mathematical equation?

2^1234 - 2^1233