Graeme −> Odds and Ends −> Puzzles −> Einstein quiz −> page 14 

 

1: The Brit lives in a red house. 6: The Pall Mall smoker rears birds. 11: The man with horses is next to Dunhill smoker.
2: Swede keeps dogs as pets. 7: The yellow house smokes Dunhill. 12: The Blue Master smoker drinks beer.
3: The Dane drinks tea. 8: The center house drinks milk. 13: The German smokes Prince.
4: Green house is just left of white house. 9: The Norwegian lives in the first house. 14: The Norwegian lives next to the blue house.
5: Green house drinks coffee. 10: The Blend smoker is next to cat owner 15: The Blend smoker's neighbor drinks water.

We've used all the rules.  The only house whose pet is unknown is the German's Green house.

House 1 House 2 House 3 House 4 House 5
Nationality  Norway Dane Brit German Swede
Color Yellow Blue Red Green White
Pets Cats Horses Birds  ? ? ?  Dogs
Drinks Water Tea Milk Coffee Beer
Smokes Dunhill Blend Pall Mall Prince Blue Master

Do you remember the question?  It was "Who keeps fish?"  Strictly speaking, you must say that it's not possible to know, because it isn't clear if anyone keeps fish.    Click the German's mystery pet for another page about this.