Solution
| House | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Color | Yellow | Blue | Red | Ivory | Green |
| Nationality | Norwegian | Ukrainian | Englishman | Spaniard | Japanese |
| Drink | Water | Tea | Milk | Orange juice | Coffee |
| Smoke | Kools | Chesterfield | Old Gold | Lucky Strike | Parliament |
| Pet | Fox | Horse | Snails | Dog | Zebra |
Here are some deductive steps that can be followed to derive the solution. A useful method is to try to fit known relationships into a table and eliminate possibilities. Key deductions are in italics.
Read more about this topic: Zebra Puzzle
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—Derek Gjertsen, British scientist, author. Science and Philosophy: Past and Present, ch. 3, Penguin (1989)