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MathNet 2009-part-05 — 172 problems (EN–VI) Question 119

Math Olympiad Vault · MathNet 2009-part-05 — 172 problems (EN–VI)

Question 119

How many sequences of $5$ positive integers $(a, b, c, d, e)$ satisfy $a b c d e \leq a+b+c+d+e \leq 10$?