Below is a problem written by Einstein last century.
He said that 98% of the people in the world cannot solve the quiz.

The Problem
There are 5 different coloured houses each with an owner of a different nationality.
Each owner drinks a different beverage, smokes a different brand of cigar and keeps a different pet. Who keeps fish as pets?
 

House
Colour		bluegreenredyellowwhite	bluegreenredyellowwhite	bluegreenredyellowwhite	bluegreenredyellowwhite	bluegreenredyellowwhite
Beverage		beercoffeemilkteawater	beercoffeemilkteawater	beercoffeemilkteawater	beercoffeemilkteawater	beercoffeemilkteawater
Pets		birdscatsdogsfishhorses	birdscatsdogsfishhorses	birdscatsdogsfishhorses	birdscatsdogsfishhorses	birdscatsdogsfishhorses
Nationality		BritDaneGermanNorwegianSwede	BritDaneGermanNorwegianSwede	BritDaneGermanNorwegianSwede	BritDaneGermanNorwegianSwede	BritDaneGermanNorwegianSwede
Cigar		BlendBlue MasterDunhillPall MallPrince	BlendBlue MasterDunhillPall MallPrince	BlendBlue MasterDunhillPall MallPrince	BlendBlue MasterDunhillPall MallPrince	BlendBlue MasterDunhillPall MallPrince

 
Clues
1) The Brit lives in a red house.
2) The Swede keeps dogs as pets.
3) The Dane drinks tea
4) The green house is on the left of the white house.
5) The green house owner drinks coffee.
6) The person who smokes Pall Mall rears birds.
7) The owner of the yellow house smokes Dunhill.
8) The man living in the house right in the centre drinks milk.
9) The Norwegian lives in the first house.
10) The man who smokes Blend lives next to the one who keeps cats.
11) The man who keeps horses lives next to the man who smokes Dunhill.
12) The owner who smokes Blue Master drinks beer.
13) The German smokes Prince.
14) The Norwegian lives next to the blue house.
15) The man who smokes Blend has a neighbour who drinks water.