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ASU 362 All Soviet Union MO 1983 squares of infinite cross-lined paper with sum

Source:

July 28, 2019
infinite boardSquaresSumcombinatorial geometrycombinatorics

Problem Statement

Can You fill the squares of the infinite cross-lined paper with integers so, that the sum of the numbers in every 4×64\times 6 fields rectangle would be
a) 1010?
b) 11?
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