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

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

What's a single-digit number with no value?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?