Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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

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

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

I have an eye but still cannot see.

Who am I?

What does below chemistry rebus means?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.