If you say my name, I will no longer exist. What am I?

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

John was piloting a plane behind a car but was never able to overtake it. Why?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

You can move only two matchsticks in the given picture. What is the highest number you can form by doing it?

What occurs twice in a week, once in a year but never in a day?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Find the next number in the sequence

5 12 24 36 ?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?