Today's Question - Sister Herman Joseph arranged a turtle race for the 6th grade math club. There were 13 turtles each with a number on its shell. During the race, she was called out of the classroom and returned to ask "who won?" The kids giggled and decided to give her a taste of her own medicine. A said "It was a single digit". B said "It had a zero in it". C said "It was an even number". D said "It was a square number". E said "It was a prime number". F said "It was an odd number". Sister knew they couldn't all be telling the truth (she learned only one of the 7 did). If "1" is not a prime and only 1,4, and 9 are squares -what turtle won?

Reveal Answer Answer - This took a real Sister Herman Joseph to figure out. You had to set a matrix with the numbers 1 through 13 across the top and the student down the left. Then you put an "x" in every number that fits the statement of each student. Thus A\'s comment that it was a single digit would put an x under every number from 1 through 10. By this process we see the only number with one x would be "12" the winning turtle. (Sister was not happy at all.)

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