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In a factory, machine A operates on a cycle of 20 hours of work followed by 4 hours of rest, and machine B operates on a cycle of 40 hours of work followed by 8 hours of rest. Last week, the two machines began their respective cycles at 12 noon on Monday and continued until 12 noon on the following Saturday. On which days during that time period was there a time when both machines were at rest? Indicate all such days.
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当前版本由 281834hjt 更新于2022-10-16 11:08:52 感谢由 281834hjt 对此题目的解答所做出的贡献。
往后推12小时：
从周一0点开始，则
每天A都会停工（每日20-24点）
周二、周四、周六B都会停工（16-24点）
往前推12小时，则：
A周二、三、四、五、六都会停工（8-12点）
B 周三、周五停工（4-12点）
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