Victor Klee and Stan Wagon discuss 24 unsolved problems in number theory and geometry, many of which can be understood by readers with a very modest mathematical background. Each problem section gives an elementary overview discussing the history of the problem, proofs of related results and a wider survey of what is known about the problem.

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'This is a book that not only belongs in every university, college, and high school library, it very definitely belongs in every public library.' Mathematical Reviews

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