What does it mean?

What can go through glass without breaking it?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

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

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Who has married many women but was never married?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?