好像论坛上很少有讨论GWD数学的 有两题在好几套题里都有出现 不过我左思右想觉得答案可能有点问题 想来请教一下
另外我个人感觉GWD数学30套题和模拟题的差别还是很大的，做模拟题的时候会比GWD多错很多 也在其他论坛上看到说GWD题目答案有些是有错的，请教一下考过的或者做过模拟题的同学是不是也有同感？
一个是第27套的第32题
If x3y4 = 5,000, is y= 5? (1) y is a positiveinteger. (2) x is an integer.
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 NOTsufficient.
答案是C，但是我觉得只要条件（1）满足就可以推出Y=5了，难道还存在其他X，Y的组合，X不是整数，但是 x3y4 = 5,000？
还有32套的27题，圆形的图发布出来，有兴趣的同学可以翻翻题目
In the figure, points A, B, C, D, and E lie on a line. A is on both circles, B is the center of thesmaller circle, C is the center of the larger circle, D is on the smallercircle, and E is on the larger circle. What is the area of the region inside the larger circle and outside thesmaller circle? (1) AB = 3 and BC =2 (2) CD =1 and DE = 4
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 NOTsufficient.
答案是A，但是我觉得条件2也可以单独也足够求出大小圆的面积差啊，假设AB段的距离是x，BC段的距离是y，则x+y=1=4,x=y+1,这样就可以分别求出大小圆的面积从而求出结果。
这两题在GWD里都出现了不止一次，所以特别来请教一下，先谢谢了！
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发表于 2013-8-27 16:33:21
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