I have teeth but i don't bite. Who Am I ?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! 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?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What has many teeth, but cannot bite?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

Bay of Bengal is in which state?

What is the largest number you can write with just 3 digits?