答案:A
解析:
hoice (A) is correct. When the positive integer n is divided by 5, the remainder is 0. It follows that n is a multiple of 5. Therefore, 3 times n is also a multiple of 5, and so the remainder when 3 times n is divided by 5 is likewise 0.
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答案:A
解析:
hoice (A) is correct. When the positive integer n is divided by 5, the remainder is 0. It follows that n is a multiple of 5. Therefore, 3 times n is also a multiple of 5, and so the remainder when 3 times n is divided by 5 is likewise 0.