N is a positive integer. When N is divided by 10, the reminder is

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N is a positive integer. When N is divided by 10, the reminder is 1; when N is divided by 3, the remainder is 2. What is the remainder when N is divided by 30?

答案：D

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老师，可以再讲下reminder么？不知道怎么下手。谢谢

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