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Lexington student wins national math contest

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BOSTON (AP) — A Lexington, Mass., middle school student has won a national math competition in Washington with the right answer to a question about integers. Alec Sun won the 2013 Raytheon MATHCOUNTS National Competition on Friday by answering in less than 45 seconds what the greatest integer is that must be a factor of the sum of any four consecutive positive odd integers. He correctly...