What do you answer even though it never asks you questions?

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?

Spot what is wrong here in below Picture?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What does this rebus means ?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

No matter how little or how much you use me, you change me every month. What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?