What does does this rebus picture means ?

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.

Why 1729 is a magic number? Answer Logically.

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

I can be cracked, made, told, and played. What am I?

What can you hold in your right hand, but never in your left hand?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?