How can you take 2 from 5 and leave 4?

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

Which is the correct shadow of the bird?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Why 1729 is a magic number? Answer Logically.

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Which point will the car reach to go out?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?