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The remainder when a base-16 number is divided by d is always the same as the remainder when the sum of the digits of the base-16 number is divided by d. What is the sum of all possible positive integer values of d? (d is base 10.) The answer should be base 10.

 Oct 7, 2020
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The sum of all possible values of d is 8.

 Oct 7, 2020

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