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

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

Can you start the fire using two pieces of wood?

On a special event at the prison, 5 prisoners John, Jacob, Krist, Tang, and Dang given a chance to go to a sauna and can bring one thing with them.

Following are the things that the prisoners bring with them.
John: A soda
Jacob: Thermos
Krist: Book named "How to kill"
Tang: A Walkman
Dang: Harmonica

Since it is a Sauna, no one can see each other. After a while When the steam is switched, Tang was found dead and there was blood all around.
J Bond was called and he instantly come to know who can be the murderer. How?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What has lots of eyes, but can’t see?

What two things can you never eat for breakfast?