Data Sufficiency
试题详情
题目：
If x and y are integers, is xy + 1 divisible by 3 ?
- When x is divided by 3, the remainder is 1.
- When y is divided by 9, the remainder is 8.
选项:
A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.
答案:
C
提问：
老师好，我不太明白课程讲解时为什么x,y可以都用相同变量K来表示[img=/uploads/askimgs/gmat-20230521-192317.jpeg]
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