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[Problem Solving]
试题详情
题目：
If n is a positive integer, then n(n + 1)(n + 2) is
选项:
A、even only when n is even
B、even only when n is odd
C、odd whenever n is odd
D、divisible by 3 only when n is odd
E、divisible by 4 whenever n is even
答案:
E
提问：
When positive integer k is divided by 5, the remainder is 2. When k is divided by 6, the remainder is 5. If k is less than 40, what is remainder when k is divided by 7?这道题要求通项公式但不知道怎么求请告知
解答：
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提问：
When positive integer k is divided by 5, the remainder is 2. When k is divided by 6, the remainder is 5. If k is less than 40, what is remainder when k is divided by 7?这道题要求通项公式但不知道怎么求请告知
解答：
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阅读1152
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