This activity challenges students to determine how many students would need to be in a school for two of them to have the same first and last initials. The activity is part of the Figure This! collection of challenges emphasizing real-world math. It introduces the pigeonhole principle and explains that it is used when people organize files and pack shipping crates. The Hint suggests that students approach the problem by finding out how many people would have to be present for at least two of them to have the same first initial. Related questions ask students to apply the pigeonhole principle to solve similar scenarios. Answers to all questions and links to resources are included. Copyright 2005 Eisenhower National Clearinghouse


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Informal Education,Process skills,Number and operations,Middle School,NSDL,Probability,Grade 8,NSDL_SetSpec_1007936,Combinations and permutations,Education,Grade 6,Problem solving,Mathematics,oai:nsdl.org:2200/20120114184230271T,Counting,Arithmetic,Grade 7



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