Data Sufficiency
试题详情
题目：
Alan and Sue have each been saving one dollar a day and will continue to do so for the next month. If Sue began saving several days before Alan, in how many days from today will Alan have saved one-half as much as Sue?
- As of today, Alan has saved 7 dollars and Sue has saved 27 dollars.
- Three days from today, Alan will have saved one-third as much as Sue.
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:
A
提问：
老师条件2我觉得也能求出天数，因为两个人都是每天存1美元那两者差值不变为20，三天之后Alan的钱将是Sue的三分之一，那20就是三分之二，10就是Alan3天之后存的钱数，30则是Sue的然后就可以求出13天后Alan是Sue的一半。哪里出了问题呀？
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