No longer updated!

## Tuesday, July 29, 2008

### Zebra

There are 5 houses. Each house has a unique color, and each owner has a different nationality. Each owner keeps a different pet, drinks a different type of beverage, and smokes a different brand of cigarettes. The Brit lives in the red house, the Sweed keeps a dog, and the Dane drinks tea. The green house is on the immediate left of the white house. In the green house they drink coffee. The man who smokes Pall Mall has birds. In the yellow house they smoke Dunhill. In the middle house they drink milk. The Norwegian lives in the first house. The man who smokes Blend lives in the house next to the house with the cats. In the house next to the house with the horse, they smoke Dunhill. The man who smokes Blue Master, drinks beer. The German smokes Prince. The Norwegian lives next to the blue house. They drink water in the house that lies next to the house where they smoke Blend.

The Question: Who owns the zebra?

The Norwegian lives in the first house and next to the blue house, so the blue house is house 2.

The green house (left of the white house) is house 3 or 4 and the white house is 4 or 5. In the house in the middle (house 3) they drink milk and in the green house they drink coffee, so the green house is house 4 and the white house is house 5.

We do not know the colors of houses 1 and 3 (red or yellow). The Norwegian lives in the first house and the Brit lives in the red house, so the Brit lives in house 3 (red) and the Norwegian lives in the yellow house (house 1).

In addition, we know that in the yellow house (where the Norwegian lives) they smoke Dunhill and that in the next house (house 2) there must be a horse.

Now we know the following:

Now, the following holds:

* Pall Mall and the bird belong to house 3, 4, or 5.
* Blend (next to the cat and the water) belong to house 2, 3, or 4.
* Blue Master and the beer belong to house 2 or 5.
* Prince and the German belong to house 2, 4 or 5.

This results in the following possible combinations:

Combinations B and C are impossible. The bird would then be in house 3, and if in house 4 they smoke Blend, the cat and the water must belong to house 5. Blue Master and the beer can, however, not belong to house 2 (since where can then the Dane be with his tea) and also not belong to house 5 (conflicts with the water).

Combinations D and E are also impossible. The bird would then be in house 4, and if house 3 they smoke Blend then house 3 does not have a cat as neighbor.

Combination F is also impossible. In house 3 they would then smoke Blend, in house 2 they would drink water and in house 4 there would be a cat. But we already know that in house 2 they drink beer.

Combination A is possible. So we conclude that the German owns a zebra.