What is the next number in this matchsticks series riddle?

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?

What is the difference between a jeweller and a jailer?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

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

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Why is a river so rich ?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

When does a USA Potato change its nationality?

How can one talk without saying a single word?