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.

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

who is silent in the parliament?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

What does below pictogram mean?

What number comes next in this sequence:
7 8 5 5 3 4 4 _