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?
At a family reunion were the following people: one grandfather, one grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one father-in-law, one mother-in-law, and one daughter-in-law.
But not as many people attended as it sounds. How many were there, and who were they?
You have three boxes of fruit. One contains just apples, one contains just oranges, and one contains a mixture of both.
Each box is labeled -- one says "apples," one says "oranges," and one says "apples and oranges." However, it is known that none of the boxes are labeled correctly.
How can you label the boxes correctly if you are only allowed to take and look at just one piece of fruit from just one of the boxes?