Puzzles/Logic puzzles/5 Houses/Solution

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Puzzles | Logic puzzles | 5 Houses | Solution


The German keeps fish.

Reasoning[edit]

Number the houses from left to right. We have the following information:

Clue 1 2 3 5 6 7 8 9 11 13 14
House 3 1 2
Colour red green yellow blue
Nationality English Swede Dane Norwegian German
Cigar Pall Mall Dunhill Blue Master Prince
Drink tea coffee milk beer
Pet dogs birds

The green house is not number 2, which is blue. Consequently and from clue 4, it is not 1 or 5. The green house resident drinks coffee, therefore the house is not 3 (whose resident drinks milk). Therefore the green house is 4, and the white house is 5.

This leaves determining the colours of houses 1 and 3. The red house is not number 1 (residents are English and Norwegian respectively) so 3, and house 1 is yellow.

House 1 2 3 4 5
Colour yellow blue red green white
Nationality Norwegian English Swede Dane German
Cigar Dunhill Pall Mall Blue Master Prince
Drink milk coffee tea beer
Pet dogs birds

From clue 12, horses are kept in the grounds of house 2. The Norwegian doesn't drink tea (the Dane does) or beer (the Blue Master smoker does) so water. Hence from clue 15, the Blend smoker lives in house 2. We now have:

House 1 2 3 4 5
Colour yellow blue red green white
Nationality Norwegian English Swede Dane German
Cigar Dunhill Blend Pall Mall Blue Master Prince
Drink water milk coffee tea beer
Pet horses dogs birds

from which most of the information easily falls into place:

House 1 2 3 4 5
Colour yellow blue red green white
Nationality Norwegian Dane English German Swede
Cigar Dunhill Blend Pall Mall Prince Blue Master
Drink water tea milk coffee beer
Pet horses birds dogs

Finally, clue 10 tells us that the Norwegian keeps cats, and the German keeps fish.