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?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

What came first, the chicken or the egg?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

How is the moon similar to a dollar?

It belongs to you, but other people use it more than you do. What is it?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Forwards I am heavy, backward I am not. What am I?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)