They call it Einstein's riddle
A real brain gymnastics!!! try to solve this:

There are 5 houses in 5 different colors.
In each house lives a person with a different nationality.
These 5 owners drink a certain drink, smoke a certain brand of cigar, and keep a certain pet.
No owners have the same pet, smoke the same brand of cigar or drink the same drink.

The question is -- WHO OWNS THE FISH?

HINTS:

- the Brit lives in the red house
- the Swede keeps dogs as pets
- the Dane drinks tea
- the green house is on the left of the white house
- the green house owner drinks coffee
- the person who smokes Pall Mall rears birds
- the owner of the yellow house smokes Dunhill
- the man living in the house right in the center drinks milk
- the Norwegian lives in the first house
- the man who smokes blends lives next to the one who keeps cats
- the man who keeps horses lives next to the one who smokes Dunhill
- the owner who smokes Bluemaster drinks beer
- the German smokes prince
- the Norwegian lives next to the blue house
- the man who smokes blends has a neighbor who drinks water.

Want the answer?

you can probably google it like anything else, but is it fun?