.:english version:.

Einstein's Riddle : 5 houses in 5 different colors exist. In each one of the houses lives a person with a different nationality. The 5 owners drink a certain type of drink, smoke a certain brand of cigarettes and have a certain pet. No owner has the same pet, smokes the same brand of cigarettes or drinks the same drink.
The question is: Who has the fish?

Keys:
* The British lives in the red house.
* The Swedish has a dog.
* The Danish drinks tea.
* The green house is on the left of the white house.
* The owner of the green house drinks coffee.
* The person who smokes Pall Mall has a bird.
* The owner of the yellow house smokes Dunhill.
* The one that lives in the middle house drinks milk.
* The Norwegian lives in the first house.
* The person who smokes Blends lives next to the one that has a cat.
* The person who has a horse lives next to one that smokes Dunhill.
* The one that smokes Bluemasters drinks beer.
* The German smokes Prince.
* The Norwegian lives next to the blue house.
* The one that smokes Blends has a neighbor who drinks water.

** Einstein wrote this riddle in the last century and said that 98% of the world-wide population could not solve it. It is not difficult, you must put much attention and be patient. * *