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

Which country gets ill every time?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Which part of London exists in France as well ?

Why do you find that most of the buildings are deprived of the 13th floor?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

I have branches, but no fruit, trunk or leaves. What am I?

When can we add 2 to 11 and get 1 as the correct answer?

I cannot talk, but I always reply when spoken to. What am I?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?