Why is 6 afraid of 7?

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

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Solve below rebus puzzle?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Why is the Hole below a Lock?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?