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Little math problem(s) December 2018
12-19-2018, 08:54 PM (This post was last modified: 12-26-2018 09:19 PM by pier4r.)
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Little math problem(s) December 2018
Given a random positive integer N, compute the sum S of its digits (for example 50 -> S = 5 + 0 = 5). Subtract this sum from N, thus getting the result "R=N-S".

What is the smallest divisor greater than 1 that can divide evenly every R so computed? Why is it so?

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Little math problem(s) December 2018 - pier4r - 12-19-2018 08:54 PM



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