What demands an answer, but asks no questions

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

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?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

The more of this there is, the less you see. What is it?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?