GWD两道题的答案，感觉有问题，大家帮忙一起看一下：）

ambertun

Q27:

The sum of positive integers x and y is 77.  What is the value of xy?

(1)     x = y + 1

(2)     x and y have the same tens digit.

                  

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.

答案是A,不过我觉得应该选D，因为按照条件2只能推出来一个38，一个39，麻烦大伙看一下涅，谢谢！

Q33:

A salesperson received a 6-percent commission on the amount of total sales up to and including $10,000, and an r-percent commission on the amount of total sales over $10,000.  If the salesperson received a total commission of $920 on total sales of $14,000, what was the value of r?

这个答案是8

不就是：

14000*6%+(14000-10000)*r%=920,然后求R吗？怎么是8呢。。。

yaowangjue

前一题同意楼主的答案

后一题,式子应该是10000*6%+(14000-10000)*r%=920,算出来是8.没超出10000是6%,超出部分r%

ambertun

嗯，非常感谢，我把up to理解错了哈