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标题: 数学jj答案不对！ [打印本页]

作者: minnie1016 时间: 2006-10-27 14:07
标题: 数学jj答案不对！

557. If N is a common multiple of 75, 98, and 140, which of the following must be true?

I. N is divisible by 9

II. N is divisible by 49

III. N is greater than 14000

讨论：III

75=3*5*5，98=2*7*7，140=2*2*5*7

N至少为2*2*3*5*5*7*7=14700

我觉得， BC应该都可以！

作者: yaomao 时间: 2006-10-27 14:24
请下最新版的，早已经更新了哈
答案就是2，3

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