Sailing to success(快乐备考,携手同行)

lxzjojo

以下是引用fantasy06在2007-1-14 10:57:00的发言：

对不起，删不掉上面重复的话.  不好意思，还想请教compound interest rate, semi-annual compound interest rate 的公式？ 下面这题的解法看不懂？

67. mary has 2000 dollars half is saved in a simple interest rate, and the other half is saved in semi-annual compound interest rate of 8%. at the end of the year the interest earned from these savings accounts equal to each other. what is the simple interest rate.

1. 8.16

2. 8.23

3. 8.25

4. 8.45

My answer is 8.16. 

答案：8.16. （1+8%/2）^2-1=8.16% —— 感谢spring1206。大家考试时看清楚semi-annual compound interest rate是怎么描述的，回来再验证。
     

compound interest rate 就是复利利率，每年算一次利息。设interest rate是X%(年利率),本金是A，那么N年后的本利和=A(1+X%)^N

semi-annual compound interest rate 应该就是每半年算一次的复利利率，如果X是年利率，那N年后的本利和就=A(1+0.5*X%)^2N; 如果X是半年利率，那N年后的本利和=A(1+X%)^2N.

这题关键是搞清楚那个8%指的是半年的利率还是全年的利率。如果8%本身已经是半年利率，那么计算公式就应该是：(1+8%)^2-1了。

wei_wangyan

不行了，数学JJ出得太快了，偶攒下的问题太多了，今天先问几个，大家有空的来帮一下偶吧？

（下面有解题思路的，偶也是看不懂，没思路的更不懂了。别笑我笨，别嫌我烦啊）

2. 坐标系里面, 第一象限, 横坐标为6,纵坐标为4的面积里面,x+y小于4的概率
实际上是三角形和矩形的面积比: (0.5*4*4)/(4*6)=1/3

19.70million~90million某東西共佔了90％，求70～75million佔幾%?
(1)75~80有32%
(2)80~90有50%

33.一个几何的一个长方形,周长150,里面很多小长方形,以原长方形的宽为长,周长是56,问有多少个这样的小长方形. (具体数字也是不很sure.......)
设大长方形的长为a，宽为b，小长方形的周长为(2b+2a)/n

53. x^2>y^2,问x>y? DS题，|x|>y, |y|<x

B，（1）无法得出结论，（2）可判断x<0，无论y是否大于0，y>x

71.DS: x,y正整数，问P^xy个位是不是1？
1)P^x 个位是1
2)P^y 个位是1

答案：D

106.DS：两条线之间夹了3个三角形，一正一反一正的。问这两条线平行么？
1）两个正放着的三角形都是正三角形
2) 中间的三角型是正三角形
答案C

119. X 四舍五入后是否是3？
1) X^2四舍五入后是9
2) X^3四舍五入后是27

148．若f(x)=b2-bx+b, 问f(b+1)等于多少？
f(b+1)=0

152.从99-199的所有奇数乘积；5^k是他的因子，问k max，

答案：13

200.ㄧ正三角形面积(9根号3),外接ㄧ圆,求圆之AREA?

先算出三角形边长为6，则圆半径为2倍根号3，面积为12Pai

答案：12Pai

[此贴子已经被作者于2007-1-14 23:21:56编辑过]

fantasy06

以下是引用wei_wangyan在2007-1-14 23:20:00的发言：

不行了，数学JJ出得太快了，偶攒下的问题太多了，今天先问几个，大家有空的来帮一下偶吧？

（下面有解题思路的，偶也是看不懂，没思路的更不懂了。别笑我笨，别嫌我烦啊）

2. 坐标系里面, 第一象限, 横坐标为6,纵坐标为4的面积里面,x+y小于4的概率
实际上是三角形和矩形的面积比: (0.5*4*4)/(4*6)=1/3

直线方程x+y=4 下方的面积比矩形

19.70million~90million某東西共佔了90％，求70～75million佔幾%?
(1)75~80有32%
(2)80~90有50%

90%-32%-50%

33.一个几何的一个长方形,周长150,里面很多小长方形,以原长方形的宽为长,周长是56,问有多少个这样的小长方形. (具体数字也是不很sure.......)
设大长方形的长为a，宽为b，小长方形的周长为(2b+2a)/n

不会

53. x^2>y^2,问x>y? DS题，|x|>y, |y|<x

B，（1）无法得出结论，（2）可判断x<0，无论y是否大于0，y>x

2）|y|<x---> x>0 & |x|>|y|

71.DS: x,y正整数，问P^xy个位是不是1？
1)P^x 个位是1
2)P^y 个位是1

don't know

答案：D

106.DS：两条线之间夹了3个三角形，一正一反一正的。问这两条线平行么？
1）两个正放着的三角形都是正三角形
2) 中间的三角型是正三角形
答案C

内错角相等，直线平行
                

119. X 四舍五入后是否是3？
1) X^2四舍五入后是9
2) X^3四舍五入后是27

don't know 四舍五入在英文中的表述和概念

148．若f(x)=b2-bx+b, 问f(b+1)等于多少？

f(b+1)=b^2-b(b+1)+b=0 题目应试b^2 instead of b2

152.从99-199的所有奇数乘积；5^k是他的因子，问k max，

答案：13  找出 100， 105， 110，115。。。195，数5的因子书

200.ㄧ正三角形面积(9根号3),外接ㄧ圆,求圆之AREA?

先算出三角形边长为6，则圆半径为2倍根号3，面积为12Pai

答案：12Pai

if 边唱=a

1/2*a*1/2a*3^(1/2)=9*3^2 --->a=6, r=(1/2*6)/(3^2) *2=2倍根号3

fantasy06

多谢jojo,厉害，单复利这么清楚，难怪去audit别人

fantasy06

请问：九宫图的英文如何表述？

忽然糊涂了：DS 题问：is x<y?   1) 推出  x<y  2）推出  x>y  选A 还是选D?

我做DS能错十几多道，正确的考虑步奏是怎样的？

充分和条件推出答案正确的关系如何？不能回答就选E?

[此贴子已经被作者于2007-1-15 7:53:37编辑过]

fantasy06

急问GWD重现，谢谢！

1．SC GWD考到一题
            GWD31-30-02
            

Caribou are wary animals with excellent hearing, so stalking them over the treeless landscape, getting close enough to kill it with nothing but a handheld lance, as Dorset people did, required exceptional hunting skill.

A. so stalking them over the treeless landscape, getting close enough to kill it
B. so to stalk them over the treeless landscape and get close enough to kill one
C. so in order to stalk them over the treeless landscape and get close enough to kill one
D. and so in order to stalk it over the treeless landscape, getting close enough to kill it
E. and so stalking them over the treeless landscape and getting close enough in order to kill it
答案是B，正式考答案顺序打乱  why B?  why not A?

5．Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is precisely the opposite, a tool for communicating with a large, public audience.c

5．Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is precisely the opposite, a tool for communicating with a large, public audience.c

A.        Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is

B.         Marconi conceived of the radio as a substitute for the telephone, a tool for private conversation, but which is

C.         Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become

D.        Marconi conceived of the radio to be a tool for private conversation, a substitute for the telephone, which has become

E.         Marconi conceived of the radio to be a substitute for the telephone, a tool for private conversation, other than what it is,

这题到底怎么选？

6．很变态的平行，同位语，有GWD题目至少2道，一个就是那个
            士兵获得勋章的那个，
            同位语的，选E的那个。
            

More than fifty years after the Second World War, a number of African American soldiers were awarded―some of them posthumously―with the Congressional Medal of Honor, which was the nation’s highest military award, and which was long overdue in recognition of their outstanding bravery.

A.        with the Congressional Medal of Honor, which was the nation’s highest military award, and which was long overdue in

B.         with the Congressional Medal of Honor, the nation’s highest military award for long-overdue

C.         the Congressional Medal of Honor, which was the nation’s highest military award, long-overdue in

D.        the Congressional Medal of Honor, the nation’s highest military award for long-overdue

E.         the Congressional Medal of Honor, the nation’s highest military award, in long-overdue

which is the answer and why? is B right and why?

fantasy06

这是那套GWD的第几篇阅读亚？本月GWD 阅读除此外只有两篇，不会吧?还是我没找到？

14．企业裁员
    

阅读里碰到一道GWD，说的是企业裁员downsizing的事。第一段一样后面发觉二段后的文章有所变化。所以看到眼熟的文章千万别头脑发热啊！看清楚再说。
   

公司要downsizing的，和一篇prep十分像，但是题不一样。长，不难。
   

3、语文里出了一到GWD做过的黑体字逻辑题：Scientists typically do their most creative work before the age of forty.  It is commonly thought that this happens because aging by itself brings about a loss of creative capacity.  However, a study has found that almost all scientists who produce highly creative work beyond the age of forty entered their fields late and less than a dozen years before their creative breakthroughs.  Since creative breakthroughs by scientists under forty also generally occur within a dozen years of the scientist’s entry into the field, the study’s finding strongly suggests that the real reason why scientists over forty rarely produce highly creative work is not due to age but rather because most have spent too long in their fields.

In the argument given, the two portions in boldface play which of the following roles?

1. The first is the position that the argument as a whole defends; the second is evidence that is advanced as part of that defense.

2. The first and second are both claims that have been advanced in support of a position that the argument as a whole opposes.

3. The first is an explanation that the argument challenges; the second provides evidence in support of a competing explanation that the argument defends.

4. The first is an explanation that the argument challenges; the second is evidence that has been used against an alternative explanation that the argument defends.

5. The first is an explanation that the argument defends; the second is evidence that has been used to challenge that explanation.

答案是D  怎么会是D? why not C?

[此贴子已经被作者于2007-1-15 10:52:57编辑过]

wei_wangyan

为什么总考那个downsizing的啊?!

fanfan那是GWD7 Q34-36

那个BF题,GWD里就是选C.

fantasy06

help!  这几道GWD原题在哪？我没做过。 

4、CR 有两道GWD/PREP的原题
        1）某国人们主要食用某种谷物，脂肪摄入量高导致整体偏胖。有些食品公司开发出了低脂谷物，预测将改善该国人们脂肪摄入量高的问题（隐含说明人们将转而是食用该种低脂谷物）
   下面哪个选项削弱该预测A 价格等因素导致人们仍倾向食用原来的谷物（与已知前提矛盾） B 改食低脂谷物后，人们的摄入量将增加，从而总体脂肪摄入量还维持在原来的水平 C 别国人们食用谷物的偏好（无关项）DE不记得了 此题思路和那道吸烟，人们总的尼古丁摄入量不变的思路是一样的    

2）那道公交收费由18涨到20，有人建议政府由9涨到10，理由是穷人-----具体不太记得了

7、逻辑遇到一道做过的，GWD应该，说一个地方财产税没变，可以收税的财产减少了，问能推出什么，答案是税收比往年少了。

 

 

 
这题也是，想不起具体是那套的了？还有一道题说得是有两个地方都卖海产品，M这个地方的产品的质量跟S这个地方的
差不多，而批发价格要低一些。因此为了获得更多的利润应该在M这个地方卖东西。问得是那个选项最支持上述说法。选项记不清楚了。我选的是，在M这里的销量的确比S的更大。

[此贴子已经被作者于2007-1-15 11:30:57编辑过]

lxzjojo

以下是引用fantasy06在2007-1-15 7:16:00的发言：

请问：九宫图的英文如何表述？

忽然糊涂了：DS 题问：is x<y?   1) 推出  x<y  2）推出  x>y  选A 还是选D?

我做DS能错十几多道，正确的考虑步奏是怎样的？

充分和条件推出答案正确的关系如何？不能回答就选E?

九宫图是啥玩意？不懂，sorry...

你的问题，如果条件1只能推出x<y,条件2只能推出x>y，那选D。

步骤应该是：先看1是否单独充分，if yes, 则排除C和E; 然后看2是否单独充分，if yes then D，if no then A。

如果1不单独充分，则排除A和D;直奔条件2，if 2 单独充分，则B。 if 2 不单独充分,则再看A和B合起来是否充分，if yes then C, if no then E.