Problem Solving
试题详情
题目：
An integer greater than 1 is prime if it is divisible only by itself and 1. Is n prime?
(1) n is between 1 and 4.
(2) n2 − 5n + 6 = 0
选项:
A、Aif statement (1) ALONE is sufficient to answer the question but statement (2) alone is not sufficient;
B、Bif statement (2) ALONE is sufficient to answer the question but statement (1) alone is not sufficient;
C、Cif the two statements TAKEN TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient;
D、Dif EACH statement ALONE is sufficient to answer the question;
E、Eif the two statements TAKEN TOGETHER are still NOT sufficient to answer the question.
答案:
D
提问：
自己选的B，因为原文并没有说n是不是integer，所以statement (1)怎么能确认呢？
另外，n is between 1 and 4，出现between这样的题，是包括还是不包括1和4本身啊？
还有要问一下老师，如果做到数学部分的最后一题了，点完了，还有1分钟，这个时候如果不自己按next，而是等它1分钟自动消耗完，那这题会不会算作我没答？
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