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

How many triangles are there on the puzzle below?

I know a nine-letter word having only one vowel.
Do you ?

What is the next number in the series?

15 29 56 108 208 ?

Why did the Girl throw the butter out of the window?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

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

Find The Missing Number In the Sequence.
6 25 64 ? 32 1