Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

What does below pictogram mean?

Where do you go to learn how to make ice cream?

What is the centre of gravity?

How many bananas can you eat if your stomach is empty?

What breaks yet never falls, and what falls yet never breaks?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Can you place three balls such that the equation shown in the picture holds true?

What is both possible and impossible at the same time?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?