What will you call your mother's brother's brother-in-law?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Find the 8 in the below-given Image.

I’m orange, I wear a green hat and I sound like a parrot. What am I?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

What is the Surname of Barbie Doll?

Why do we preferably have round manhole covers and not square ones?