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

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

People put me on the table and cut me but do not eat me. What am I?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What number should come in place of the question mark below?