I’m tall when I’m young, and I’m short when I’m old. What am I?

There is something which is always coming but never arrives?

What number divided by 4 is the same as that number minus 4?

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

What Am I?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

Find the missing number in the sequence below:

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Count the number of lines in the image below ?

A bomb exploded in a room full of married couples and no one died. How?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100