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.

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

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

why number 8549176320 is one of a kind?

Can you place six X (crosses) in below board without making three in a row in any way ?

10+10 and 11+11 can give you the same answer.

Explain how?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

Which of the below owl is odd one out?