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

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

What can you catch but never throw?

What goes up but never comes down?

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?

I have teeth but i don't bite. Who Am I ?

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?

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?

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