what does the below rebus means?

What is the next number in this series?

4,12,84,3612....

what does this below rebus represent identXQQQQQME

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

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.

Which holiday are we talking about?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?