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cubes in 99x101 table - All-Russian MO 2000 Regional (R4) 9.5

Source:

September 26, 2024
combinatoricsnumber theoryperfect cube

Problem Statement

In a 99×10199\times 101 table , cubes of natural numbers, as shown in figure . Prove that the sum of all numbers in the table are divisible by 200200. https://cdn.artofproblemsolving.com/attachments/3/e/dd3d38ca00a36037055acaaa0c2812ae635dcb.png