Which alphabet letter is a question?

Find out the missing number in the picture attached:

A man was just doing his job when his suit was torn. Why did he die three minutes later?

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?

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?

What country can make you shiver?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

O_er_t_o_

Complete the missing letters of the given word.

In a Society, there are over 100 flats.

Flat 1 is named the first flat.
Flat 2 is named the second flat.
Flat 3 is named the third flat. And So On.....

A visitor decides to walk through all the flats, and he finds all the flats except flat 62.
Anmol later founds that the locals of the town have given it another name.

What is the name of the Flat?