AMC 8 2017 Problem 24
AMC8 2017 年第 24 题
基本计数原理★★★★☆
Mrs. Sanders has three grandchildren, who call her regularly. One calls her every three days, one calls her every four days, and one calls her every five days. All three called her on December 31, 2016. On how many days during the next year did she not receive a phone call from any of her grandchildren?
女士有 3 个定期给她打电话的孙子．其中一个每三天通话一次，一个每四天通话一次，还有一个每五天通话一次。这 3 个孙子在 2016 年 12 月 31 号这天同时给她通了话。问下一年中有多少天她一个电话也没收到？
- A.78
- B.80
- C.144
- D.146
- E.152
正确答案 · Correct Answer
D
解析 · Solution
解析整理中
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