Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

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.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

What is the end of everything?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Where do you go to learn how to make ice cream?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?