What is full of holes but still holds water?

what does the below rebus means?

What question can you never answer yes to?

Imagine you are in a room with no windows or doors. How will you get out?

A and B have a certain number of chocolates with them. If B gives one chocolate to A, they will have an equal number of chocolates. But if A gives one chocolate to B, then A will be left with half the number of chocolates that B has.

Can you find out the number of chocolates they have right now?

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?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

Can you write down eight eights so that they add up to one thousand?

Find the number of squares in the below picture

What four weights can be used to balance from 1 to 30 pounds?