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MathNet 2024-part-03 — 168 problems (EN–VI) Question 119

Math Olympiad Vault · MathNet 2024-part-03 — 168 problems (EN–VI)

Question 119

Consider $2 \times 60$ grids where each cell contains a distinct number from $1$ to $120$. For each grid, calculate the sum of the elements in each row and each column, resulting in $62$ sums. A grid is called an *even grid* if all $62$ sums are even numbers, and an *odd grid* if all $62$ sums are odd numbers. Which type of grid (even or odd) occurs more frequently?

(Gantumur Choijilsuren)