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

If an electric train is travelling south, then which way is the smoke going?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Next Number in the Series,

5, 16, 49, 104, ?

What does this rebus riddle means ?

Which wheel of car does not rotate when you turn your car right?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?