Which wheel of car does not rotate when you turn your car right?

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.

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Count the Triangle in the figure given below:

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

What has a bottom at the top?

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

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Why did the Girl throw the butter out of the window?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.