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MathNet 2019-part-07 — 184 problems (EN–VI) Question 130

Math Olympiad Vault · MathNet 2019-part-07 — 184 problems (EN–VI)

Question 130

Find the largest fraction out of the 1010 fractions given below:
$$
\frac{1}{2019},\quad \frac{1+2018}{2019+2},\quad \frac{1+2018+3}{2019+2+2017},\quad \frac{1+2018+3+2016}{2019+2+2017+4},\quad \frac{1+2018+3+2016+5}{2019+2+2017+4+2015},\quad \dots,
$$
$$
\frac{1+2018+3+2016+\dots+1009}{2019+2+2017+4+\dots+1011},\quad \frac{1+2018+3+2016+\dots+1009+1010}{2019+2+2017+4+\dots+1011+1010}.
$$
(Bohdan Rublyov)