Identify the hidden meaning behind this picture?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

I have branches, but no fruit, trunk or leaves. What am I?

What do you call a fish without an eye?

When 99 is considered higher than 100?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?