If you say my name, I will no longer exist. What am I?

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?

What has many keys but can’t open a single lock?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

I don't get anymore wetter, no matter how much rain falls on me.

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

What Am I?

What you cannot hold but it is yours?