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MathNet 2022-part-03 — 197 problems (EN–VI) Question 125

Math Olympiad Vault · MathNet 2022-part-03 — 197 problems (EN–VI)

Question 125

Can the expression $\frac{a}{a+1} + \frac{a}{a+2} + \frac{a}{a+3} + \frac{a}{a+4}$ be an integer for some positive rational number $a$?