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?

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

You can see it everyday, But cannot touch it at will. What is it?

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

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Which English verb becomes past tense just by rearranging the letters?

There is something which is always coming but never arrives?

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

Can anyone tell me a word in the English dictionary which has a silent 'z'?