Replace the question mark with the number below given a simple math problem.

Can you find the thief by just looking at the picture below?

What word begins and ends with an E, but has only one letter?

When it's bad luck to meet a black cat?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

Can you write down eight eights so that they add up to one thousand?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

Identify The phrase in the picture.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?