Thursday, June 11, 2009

The Zebra Puzzle

The Setup:
  1. There are five houses.
  2. The Englishman lives in the red house.
  3. The Spaniard owns the dog.
  4. Coffee is drunk in the green house.
  5. The Ukrainian drinks tea.
  6. The green house is immediately to the right of the ivory house.
  7. The Old Gold smoker owns snails.
  8. Kools are smoked in the yellow house.
  9. Milk is drunk in the middle house.
  10. The Norwegian lives in the first house.
  11. The man who smokes Chesterfields lives in the house next to the man with the fox.
  12. Kools are smoked in a house next to the house where the horse is kept.
  13. The Lucky Strike smoker drinks orange juice.
  14. The Japanese smokes Parliaments.
  15. The Norwegian lives next to the blue house.
The Problem: Who drinks water? Who owns the zebra?
  • Each of the five houses is painted a different color, and their inhabitants are of different national extractions, own different pets, drink different beverages and smoke different brands of American cigarettes.
  • In statement 6, right refers to the reader's right.
  • It is possible not only to deduce the answers to the questions but to figure out who lives where, in what color house, keeping what pet, drinking what drink, and smoking what brand of cigarettes.
The 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

4 comments:

  1. So actually I saw this problem in february and it was titles Einsteins iq test. he said that if you could solve it, you were smarter than 99% of people, but that the answer is that who owns the zebra is impossible to figure out because the last remaining house does not necessarily own the zebra,which is only a stated premise for a question but never stipulated.

    im not sure how true that is though.

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  2. that is true...he last remaining house does not necessarily own the zebra its just implied.

    There is no known evidence for Einstein's authorship; and the original puzzle cited below mentions brands of cigarette, such as Kools, that did not exist during Einstein's boyhood.

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  3. Einstein used Special Relativity to deduce that a cigarette company named Kool would be established.

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  4. I used the Theory of General Relativity to conclude that your mother would be established.

    ReplyDelete