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Einstein's Intelligence Quiz

Einstein wrote this quiz last century. He said that 98% of the people in the world cannot solve the quiz. http://www.business.uiuc.edu/broker/iq.htm

There are 5 houses in 5 different colors
In each house lives a person with a different nationality
These 5 owners drink a certain type of beverage, smoke a certain brand of cigar, and keep a certain pet
No owners have the same pet, smoke the same brand of cigar or drink the same drink.
Here's the question: Who owns the fish?

1. The Brit lives in a red house
2. The Swede keeps dogs as pets
3. The Dane drinks tea
4. The green house is on the left of the white house
5. The green house owner drinks coffee
6. The person who smokes Pall Mall rears birds
7. The owner of the yellow house smokes Dunhill
8. The man living in the house right in the middle drinks milk
9. The Norwegian lives in the first house
10. The man who smokes Blend lives next door to the one who keeps cats.
11. The man who keeps horses lives next door to the man who smokes Dunhill
12. The owner who smokes Blue Master drinks beer
13. The German smokes Prince
14. The Norwegian lives next to the blue house
15. The man who smokes Blend has a neighbor who drinks water

With these 15 clues the problem is solvable.
Here's the question: Who owns the fish?

Technique to solve this quiz

Step 1. Create a matrix of 5 houses by 5 characteristics. Use Excel.

Step 2. Fill in the clues that can fit into a specific house.

House 1 2 3 4 5
Colour
Blue


People Norw



Drink

Milk

Smoke




Pet





Step 3. Fill in the next few clues that can easily fit into the matrix.

House 1 2 3 4 5
Colour Yellow Blue Red Green White
People Norw
Brit

Drink

Milk Coffee
Smoke Dunhill



Pet
Horse



Step 4. Work out the houses that can fit the remaining clues

Swede, dog: 4 or 5
Dane, tea: 2 or 5
PMall, bird: 3, 4 or 5
BMaster, beer 2 or 5
German, prince 2, 4 or 5


By elimination, the German must live in house 4, the Swede in 5 and the Dane in 2.

House 1 2 3 4 5
Colour Yellow Blue Red Green White
People Norw Dane Brit German Swede
Drink
Tea Milk Coffee
Smoke Dunhill

Prince
Pet
Horse

Dog


Step 5. Now fill in the remaining clues.

House 1 2 3 4 5
Colour Yellow Blue Red Green White
People Norw Dane Brit German Swede
Drink Water Tea Milk Coffee Beer
Smoke Dunhill Blend PMall Prince BMaster
Pet Cat Horse Bird
Dog


Answer: The German keeps the fish

Full answers at: http://www.macchetta.com/manolo/344/2007/einstein-quiz-solved.html



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