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

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

What is the riddle which can be asked all day with a different correct answer each time.

I have an eye but still cannot see.

Who am I?

What question can you never answer yes to?

Why 1729 is a magic number? Answer Logically.