Question

dividing the square of any positive integer a by 5 the remainder cannot be_

Answer 1

Answer:

it can not be negative .

Answer 2

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When positive integer n is divided by 5, the remainder is 1. When n is divided by 7, the remainder is 3. What is the smallest positive integer k such that k + n is a multiple of 35 ? So, n + k is divisible by 5, when (1+ k) is a multiple of 5.

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