Assignment 1: Logic Application

Topics: Question, Deductive reasoning, Logic Pages: 2 (608 words) Published: March 22, 2013
Assignment 1: Logic Application
Andy, Belle, Carol, and I are playing the game Guess Your Card. In the game, each person draws three cards without looking from a stack of cards containing contain multiple cards ranging in denomination from one to nine. Each person then places the cards on his or her forehead so that all of the other players can see the others’ cards, but cannot see their own. There is also a stack of questions that each person draws from in turn. These questions help the players deduct the identities of their own cards. We have shuffled the deck and each player has drawn three cards and placed them on their own forehead. Andy has drawn 1, 5, and 7; Belle has drawn 5, 4, and 7; and Carol has drawn 2, 4, and 6. Obviously I cannot see my own cards. Andy draws the first question, which asks, “Do you see two or more players whose cards sum to the same value?” To which he answers, “Yes.” Belle’s turn is next. Her card asks, “Of the five odd numbers, how many different ones do you see?” She responds, “All of them.” With these two questions, I am able to deduce which cards I have. After Andy drew the first question, “Do you see two or more players whose cards sum to the same value?” I added up Belle’s and Carol’s cards to see if theirs sum to the same total. Belle’s cards (5,4,7) add up to 16. Carol’s cards (2,4,6) add up to 12. Since Belle’s and Carol’s cards do not add up to the same amount, I can conclude that my cards add up to either 16 or 12. The next question regarding how many odd numbered cards Belle sees, indicates that I have the two remaining odd numbers, as the only odd numbered cards visible to me are 1,5, and 7. At this point, I know that I have 3 and 9. Since Belle’s cards add up to 16 and Carol’s to 12, and my 3 and 9 cards add up to 12, I know that the unknown card must be 4, which added to 3 and 9, makes 16. Andy is able to deduce his cards based only on Belle’s question, “Of the five odd numbers, how many different ones do you...
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