Brain Teasers
The Science Fair
Isaac and Albert were excitedly describing the result of the Third Annual International Science Fair Extravaganza in Sweden. There were three contestants, Louis, Rene, and Johannes. Isaac reported that Louis won the fair, while Rene came in second. Albert, on the other hand, reported that Johannes won the fair, while Louis came in second.
In fact, neither Isaac nor Albert had given a correct report of the results of the science fair. Each of them had given one correct statement and one false statement. What was the actual placing of the three contestants?
In fact, neither Isaac nor Albert had given a correct report of the results of the science fair. Each of them had given one correct statement and one false statement. What was the actual placing of the three contestants?
Answer
Johannes won; Rene came in second; Louis came in third.All you have to do to solve this is look at Isaac's first statement: "Louis won the fair". If this were true then neither of Albert's statements could be true. Therefore this must be Isaac's false statement.
This means that Isaac's second statement, "Rene came in second" must be true, which in turn means that Albert's first statement, "John came in first" must also be true. This leaves Louis in third place.
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