what does this below rebus represent identXQQQQQME

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Can you find a five letter word that is left with only two letters if one is removed?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

In the picture given below, can you find out which digit will take place of the question mark?

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?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?