How many times can you subtract the number two from the number fifty?

Before Mount Everest was discovered, what was the highest mountain in the world?

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?

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

The more you take me, the more you leave me behind.
Who 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?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?