Question 89
Find all positive integers $n$ that cannot be written in the form
$$
n = \frac{a}{b} + \frac{a+1}{b+1},
$$
where $a$ and $b$ are positive integers.
$$
n = \frac{a}{b} + \frac{a+1}{b+1},
$$
where $a$ and $b$ are positive integers.
MathNet 2025-part-02 — 186 problems (EN–VI) Question 89
Math Olympiad Vault · MathNet 2025-part-02 — 186 problems (EN–VI)