Puzzled: Find the magic set
Abstract
Welcome to three new puzzles. Each involves a collection of items, and your job is to find a subset of them that is characterized by a particular property. Since solving the puzzles is not easy, here are a couple of hints: For the first, think about averages; for the other two, try constructing your sets sequentially, bearing in mind that if two partial sums are equal, the terms between them must add up to zero.
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- Puzzled: Find the magic set
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Copyright © 2012 ACM.
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Association for Computing Machinery
New York, NY, United States
Publication History
Published: 01 August 2012
Published in CACM Volume 55, Issue 8
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