I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

What seven-letter word has hundreds of letters in it?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

What is wrong in the below Picture?

The dirtier I get, the whiter I look. Who am I?

What is the end of everything?

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?

What four weights can be used to balance from 1 to 30 pounds?

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?