Monthly Archives: September 2019

On computing the checksum

Problem Marius Bancila [Bancila 2018](Chapter 8, Problem 69) describes a checksum computation problem which can be paraphrased as follows: Let X = x1x2…xN where xi is a decimal digit. X is a valid number if (Σi=0N (N-i+1)*xi) mod 10 = … Continue reading

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