Question: Exercises 25 : We have been told in arithmetic that the reminder of an integer divided by 9 is the same as the reminder of

Exercises 25 : We have been told in arithmetic that the reminder of an integer divided by 9 is the same as the reminder of division of the sum of its decimal digits by 9. In other words, the reminder of division 6371 by 9 is the same as dividing 17 by 9 because 6+3+7+1=17. Use the properties of the mod operator to prove this claim

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