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

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

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

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

There is something which is always coming but never arrives?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

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

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