CombinatoricsDifficulty 5.0AIME, harderFind the answerUnited Kingdom
Let S be a set of five different positive integers, the largest of which is m. It is impossible to construct a quadrilateral with non-zero area, whose side-lengths are all distinct elements of S. What is the smallest possible value of m?
(A) 2 (B) 4 (C) 9 (D) 11 (E) 12
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