考试要是遇到这题我选什么！GWD怎么这样给答案的~

百叶旭灵 · 发表于 2011-9-15 19:21:25

这是GWD第二套第5题和第十套第二题的题目，题目相同，给的答案不同，2套给答案是D，10套给答案是A~很显然，选A是因为默认不知道C点是在D点左边还是后边~选D是因为已经默认C点在D点左边~好恶心啊！尼玛要是我正式考试出这种题目我选什么！？？？？

还有这题~~
Q32:
What is the remainder when the positive integer x is divided by 8?
(1)When x is divided by 12, the remainder is 5.
(2)When x is divided by 18, the remainder is 11.

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.
Answer: E（GWD答案）

可是网上的答案是~~

(1)considering 17 = 1X12 + 5 divided by 8 the remainder is 1, 29 = 2X12 + 5 divided by 8 the remainder is 5; so the remainder is not determined. NOT sufficient.
(2)ditto. considering 29 = 1X18 + 11 and 47 = 2X18 + 11. NOT sufficient.
Taken together, and then x = 12m + 5 = 18n + 11; this equation can be satisfied if and only if m = 2, n = 1. Because, consider the geometrical graphs of the two equations, two different lines can intersect in one point at most. so x is determined as 29, and the remainder also be determined.

说得也有道理~但是我觉得不知道数字再大点会不会有其他的结果~~选E也有可能~想死中~~

还有哪位高人告诉我下这道题题目是问什么~~
If S is the sum of the reciprocals of the consecutive integers from 91 to 100, inclusive, which of the following is less than S?

1、八分之一

2、九分之一
3 十分之一

A.None
B.I only
C.III only
D.II and III only
E.I, II, and III
Answer: C (GWD答案）

(1)considering 17 = 1X12 + 5 divided by 8 the remainder is 1, 29 = 2X12 + 5 divided by 8 the remainder is 5; so the remainder is not determined. NOT sufficient.
(2)ditto. considering 29 = 1X18 + 11 and 47 = 2X18 + 11. NOT sufficient.
Taken together, and then x = 12m + 5 = 18n + 11; this equation can be satisfied if and only if m = 2, n = 1. Because, consider the geometrical graphs of the two equations, two different lines can intersect in one point at most. so x is determined as 29, and the remainder also be determined.

说得也有道理~但是我觉得不知道数字再大点会不会有其他的结果~~选E也有可能~想死中~~

还有哪位高人告诉我下这道题题目是问什么~~
If S is the sum of the reciprocals of the consecutive integers from 91 to 100, inclusive, which of the following is less than S?

1、八分之一

2、九分之一
3 十分之一

A.None
B.I only
C.III only
D.II and III only
E.I, II, and III
Answer: C (GWD答案）

百叶旭灵 · 发表于 2011-9-15 19:31:51

还有这题~~
2, A certain quantity is measured on two different scales, the R-scale and the S-scale, that are related linearly. Measurements on the R-scale of 6 and 24 correspond to measurements on the S-scale of 30 and 60, respectively. What measurement on the R-scale corresponds to a measurement of 100 on the S-scale?

A. 20
B. 36
C. 48
D. 60
E. 84
GWD答案是C~~可是网上解答我觉得挺对（但是我还是不知道题目到底问什么）~~
24R-6R=60S-30S
18R=30S
18R/30=S
100S=100x18R/30=60R
选D 。

beef · 发表于 2011-9-15 21:05:46

linely 是线性关系的意思~这道题就是知道一次函数上两点，并且一直一点y值是100，求x的意思啊。

beef · 发表于 2011-9-15 21:08:02

已知一点（改“一直一点”），不要想得太复杂啊。就是一个对应嘛，题就是讲的一个x对应一个y。

茶花 · 发表于 2011-9-15 21:50:47

If S is the sum of the reciprocals of the consecutive integers from 91 to 100, inclusive, which of the following is less than S?
1、八分之一
2、九分之一
3、十分之一
s是91到100这10个数的倒数的和，包括91和100，那么下面哪个数比s小？
列公式是s=1/91+1/92....+1/100
首先1/100=0.01，
其次其它9个数由于分母都小于100，所以都大于0.01，
9个大于0.01的数和0.01加起来，
10个数的和大于1/10

茶花 · 发表于 2011-9-15 22:05:48

2, A certain quantity is measured on two different scales, the R-scale and the S-scale, that are related linearly. Measurements on the R-scale of 6 and 24 correspond to measurements on the S-scale of 30 and 60, respectively. What measurement on the R-scale corresponds to a measurement of 100 on the S-scale?
A. 20
B. 36
C. 48
D. 60
E. 84
这道题的思路参考牛肉说的，就把它当做求点（x,y）的坐标值来算。我算出来跟gwd答案一样：
三点（6,30）（24,60）（x,100）在一条线上，先用已知信息求斜率60-30/24-6=15/9，
再将未知的第三点的信息带入斜率计算公式，就可以求出来x的值：
100-60/x-24=15/9, x=48

百叶旭灵 · 发表于 2011-9-15 23:17:34

哇~大哥~~可以把原题翻译给我吗？我完全不懂原题说什么~~
而且最后那个斜率公式~是咋米回事？
怎么突然间就100-60/x-24=15/9了~~~麻烦指教~~谢谢~前面的都看懂了~

百叶旭灵 · 发表于 2011-9-15 23:21:38

恩恩！谢谢！！灰常感激~

~~那圆的那道题你觉得有合理解释吗？

tinyhuhu · 发表于 2011-9-15 23:25:51

支持48

百叶旭灵 · 发表于 2011-9-15 23:26:25

哈哈，谢谢~我看懂你说的了~~恩恩！！！
那这道题~Q32:
What is the remainder when the positive integer x is divided by 8?
(1)When x is divided by 12, the remainder is 5.
(2)When x is divided by 18, the remainder is 11.
GWD选E你怎么看呢？还有圆形那道题答案不一致的问题~~

考试要是遇到这题我选什么！GWD怎么这样给答案的~

所属分类: GMAT考试

正在浏览此版块的会员 ()

浏览过的版块