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MathNet 2010 — Part 05 Question 110

Math Olympiad Vault · MathNet 2010 — Part 05

Question 110

100 Pairwise Distinct Real Numbers Are Arranged in A Circle. Prove that there exists that the sum of the two middle one two. 100 in pairs of different numbers are arranged around the circle. Prove that you can choose 4 consecutive numbers in such a way that the sum of the two extreme numbers of this four is strictly greater than the sum of the averages. (S. Berlov)