There are 5 houses each painted one five different colors (red, green, yellow, white and blue).
In each house lives a person/owner with a different nationality (Brit, Swede, German, Dane and Norwegian).
These five 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 beverage.
• The Brit lives in the red house
• The Swede keeps dogs as pets
• The Dane drinks tea
• The green house is on the left of the white house
• The person who smokes Pall Malls rears birds
• The owner of the yellow house smokes Dunhill
• The green house’s owner drinks coffee
• The man living in the center house drinks milk
• The Norwegian lives in the first (leftmost) house
• The man who smokes Blends lives next to the one who keeps cats
• The man who keeps horses lives next to the man who smokes Dunhill
• The owner who smokes BlueMaster drinks chocolate
• The German smokes Princes
• The Norwegian lives next to the blue house
• The man who smokes Blends has a neighbor who drinks water
Now to solve, tell me who owns the fish?
It is said that only two percent (2%) of people in the world can solve the riddle. Attempt with paper/pen or spreadsheet table first before seeking solution on the web.
Also, see this article to discussing difficulty AI systems have with Einstein’s Riddle - Chatbot Software Begins to Face Fundamental Limitations https://www.quantamagazine.org/chatbot-software-begins-to-face-fundamental-limitations-20250131/
“The team also tested the LLMs on tasks like Einstein’s riddle, where it also had limited success. GPT-4 always got the right answer when the puzzle involved two houses with two attributes per house. But the accuracy fell to 10% when the complexity of the puzzle increased to four houses with four attributes per house. For the original version in Life International — five houses, each with five attributes — the success rate was 0%”.
