PS:
Number 1-20 , prime number: composite number比例
考點: 1是prime/composite number
DS:
Nurse每星期 working hour: 40hours, maintence worker: 36hours, 如果今個星期少了10個nurse上班, 問nurse total working hour大過maintenance 嗎?
1. Number of nurse last week 少過或等於95
2. Number of maintence worker 大過或等於110