Name a key which is hardest to turn.

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.

Decode below rebus
D
N
A
T
S , D

What does Alexander the Great and Winnie the Pooh have in common?

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?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

What kind of band never plays music?

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?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?