Why is it against the law for a man living in Delhi to be buried in Mumbai?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

What do you answer even though it never asks you questions?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

There is something which is always coming but never arrives?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What goes up but never comes down?