How many words can a pen with half refill write?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?

What always comes into a house through the keyhole?

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?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Bay of Bengal is in which state?

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

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Can you find the dog hidden in a group of pandas?