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MathNet 2015-part-02 — 191 problems (EN–VI) Question 143

Math Olympiad Vault · MathNet 2015-part-02 — 191 problems (EN–VI)

Question 143

There are $125$ distinct positive integers in a row in such a way that among every three consecutive numbers the second one is larger than the arithmetic mean of the first and the third one. Find the largest number in the row, given that it is as small as possible under such conditions.