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题目内容
Claire regularly backs up both of the computers that she owns. On the first day of June, she backs up both computers. Thereafter, she backs up one of the computers every sixth day during June (that is, on June 7 and so on), and she backs up the other computer every eighth day during June. On how many of the 30 days in June $$\underline{does}$$ she not back up either of the two computers.
_____days
_____days
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· 相关考点
6.1.2 交集、并集、补集、全集关系 1.7.1 公倍数与最小公倍数 1.6.4 倍数的个数
6.1.2 交集、并集、补集、全集关系
以上解析由 考满分老师提供。