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?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

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

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

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?