Einstein's Riddle

Einstein's Riddle
ATEC BLOG
This week's riddle is known as Einstein's Riddle. It is said that 98% of the world could not solve it. Can you solve it? Give it a shot!


 

Problem:

In a neighborhood, there are 5 houses places next to each other, as shown in the image above. Each house has a different owner and all of them are of different nationality. Each house has different colored walls. Each house's owner drinks their own specific beverage, smokes their own brand of cigar, and keeps a certain type of pet. None of the houses share any of these characteristics - nationality, wall color, beverage, cigar, and pet. All houses are unique.
 

Question:

One of the house owners keeps fish, who is it?

You will need to know this: 

1.) The Englishman lives in the 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 owner of the green house drinks coffee.
6.) The man who smokes Pall Mall keeps birds.
7.) The owner of the yellow house smokes Dunhills.
8.) The man living in the center house drinks milk.
9.) The Norwegian lives in the first house.
10.) The Blend smoker has a neighbor who keeps cats.
11.) The man who smokes Blue Masters drinks beer.
12.) The man who keeps horses lives next to the Dunhill smoker.
13.) The German smokes Prince.
14.) The Norwegian lives next to the blue house.
15.) The Blend smoker has a neighbor who drinks water.
 

Hint: 




Start by filling out the chart shown above. Your Sudoku skills may be required.
 

Solution

So who keeps fish? The German. He lives in house 4, which has green walls, and he smokes Prince cigars and drinks coffee.

Start with the pieces of information given to you: the Norwegian lives in the first house (clue 9), and the man in the center house drinks milk (clue 8). Fill these in on the chart. These are just like the starting numbers in a Sudoku puzzle.

Now begins the long process of deduction. You know that the Norwegian lives next to the house with blue walls (clue 14), and there is only one house next to the first house, so house 2 has blue walls.

Now you need to look at clue 4 and 5 together: the owner of the house with green walls drinks coffee (clue 5), and the house with green walls is just to the left of the house with white walls (clue 4). The green walled house with the coffee drinker cannot be house 2, because that house has blue walls, and it cannot me the middle house (house 3) because the owner of that house drinks milk. So it the house with green walls and the coffee drinker is house 1, 4, or 5—but it also needs to be directly to the left of the house with white walls, which eliminates house 1 and 5 because the white walled house cannot sit to the right of house 1 or 5. So now you now that house 4 has green walls and the coffee drinker, and you know that house 5 has white walls.

And so on and so on, until you find the fish. Perhaps the trickiest deduction you have to make along the way is finding out who drinks water.

You can see the chart complete with all the information here.


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