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

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.

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Solve the puzzle by telling what does below picture means.

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.