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This activity offers a logic problem in which students are shown an array of smiling, frowning, and neutral faces. Each row and column adds up to a different dollar amount, and students are challenged to determine how much a smile is worth. The activity, from the Figure This! collection of 80 online challenges, notes that working with equations is an important skill in such careers as nursing, chemistry, and engineering. Students are encouraged to begin this challenge by finding rows or columns that have only frowning or smiling faces and finding a way to combine two of them. Two alternative solutions are provided. Additional pages feature hints, related math questions, and resources for learning more about game theory and logic puzzles. Copyright 2005 Eisenhower National Clearinghouse
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