标题: 请教思路prep２ [打印本页]
作者: susenmayorer 时间: 2008-1-1 06:46 标题: 请教思路prep２
54. When positive integer n is divided by 3, the remainder is 2; and when positive integer t is divided by 5, the remainder is 3. what is the remainder when the product nt is divided by 15?
1) n-2 is divisible by 5 2) t is divisible by 5
Answer: C
作者: felicitymq 时间: 2008-1-1 20:42
条件２ 和 题干怎么说ｔ不同啊。
作者: susenmayorer 时间: 2008-1-2 06:33
哦 条件2错了应该是 t is divisible by 3
请再帮看看吧 谢谢
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