北美12/22 殺G成功760 開門放狗

melody2120

剛剛在紐約考完，考得比想像中好（本來心裡只想過７００就好了；運氣很好，數學多虧狗狗要不然應該做不完）。　

Math- 50
數學真的碰到很多隻狗...至少1/2 的題吧. 我來把我記得的題列一下 (sorry新題都沒記得):

1)  V2: 八边形与七边形的对角线差多少跟，告诉了你公式的 放心。n(n-3)/2.别算错就好。
- 這個公式記一下; 題目描述的有點饒口
4) V2有一个pool长60feet，宽30feet，高3feet，底部有多出的一个部分，深度是6feet，长度是pool长度的
2/3,求pool的内表面积
- measurement 對, 應該是 E 4000

7) V2电影院中，当有X人，有Y个空位子；当有2X人的时候，空位子比原来少1000个，那么当电影院的座位是4x，若坐了700人，还剩多少位子?

- numbers 對, 應該是 E 3300
23) DS， A、B两个盒子，各从里面取出一颗candy，问是atleast一颗是红色candy的概率。
1）A里取出红色candy的概率是0.25，B里取出红色candy的概率是0.3
2）先从A里取出一颗，再从B里取出一颗

- 是A沒錯
29）  DS。 利率题。给出一笔钱n年后的数目的公式 M＝（1＋p）^n*2000, n是年份，p是利率=5percent。问是否n>4
1）M>2100
2）M<3000

-我也是硬算的(不敢直接選答案怕數字改了)- 應該是E
35). 有个人用欧元兑换美金,1美金=0.8欧元,兑换的时候被扣4%的手续费,这个人最后拿到了1325美金(数据不确定),问他兑换了多少欧元
(1325/0.96)*0.8  = 1104.17

- 這個數字有變, 不過算法不變, 我那題算出來1,500多 (記得是B)

39) V2 0.020<x<0.021,问 (1/根号10)-(1/x)=? 选项里有0.02， 0.002，0.0002什么的

- 我這題有點變,變成: 0.020<x - 根號10 <0.021, 問的跟選項還是一樣.
56)  DS K、M、Z是三个大于1的正整数，求K+M+Z？

条件一MZ=15，

条件二KMZ=30，
B单独就能满足，因为只能是2*3*5
- B 應該對, 因為題目有說 KMZ都大於1

58)  DS X是否小于0.0015percent?（注意那个percent！）
条件一X小于4.5*10^（-5）
条件二X小于9.5*10^(-6),     选B，千万不要忽略了百分数而选了D
- 這題數字一樣

65)  DS 有十五个数，Median=85，求average
（1）15个数里最小值为70，最大值为100
（2）前7个的average等于前7个的median，后7个的average等于后7个的median。
- 這題沒有條件說all the numbers are different, 所以我想是E

66)  老人留遗嘱，财产的1/3给女儿，剩下的部分的1/3给儿子后，剩下320,000。求儿子分得多少财产。
答案：160,000- 沒錯我在考場上又算了一遍

70)  V2 角坐标系里点A（4，0）B（0，4).p的坐标为（r，s），问能证明角APB是直角吗。（注意和原jj上不一样！）
（1）r^2+s^2=4(r+s)
（2）r^2+s^2=0
- 我選D. 應該就是討論版上的結論

110)    如下图， 相同的五个正方形组成的图形 边长为5   问 周长。    方法将那两个不规则的正方形移到一边成规则状。解之。  
- 答案是 60

118)问根号下X是不是整数
（1）x+9是质数
（2）对于some integer y, x-9 = y^2-6y
- B. function can be reduced to: x= y^2-6y+9 = (y-3)^2; plus y is integer

131)   DS一个圆锥（原文描述是：考古学家发现一个遗迹，形成了一个圆锥形。。。废话一堆） ，问高是多少 （1）圆锥的侧面母线是10M （2）圆锥底面积为20π，距离底面积高2米位置的圆锥的底面积是10π
- B (剛剛想想發現選錯了...選成C. 虧我還算了2次)

165)  4^(-x)在什么情况下等于1/(4^x)

- 這題是PS, 選項中有 x is positive, x is negative, all x. 我選all x

185） 有一道F（x）=AX方+BX+C,过（1，2）问过不过（-1，2）？
（1）F(X)=f（-X）
（2）B=0
选d
198）说X=170 Y是2位数 such that X=10的20次方-Y. 求Y
- 這有很多種可能. 要選 xxxxx00 - Y 的頭兩位加起來是8的選項 (the answer of 10^20-y will be a number with 18 digits of 9: 170-18*9=8, so 8 is the sum of the first two digits of X). For example, 47.

236） 说f(n)代表从1乘到n,问f(11)+2，f(11)+3, f(11)+5,f(11)+7 (加几的数字不太确定)，有几个是质数？
- answer is 0.

274)   DS：x^2>3x?
（1）x is not negative
 (2) |x|>3

276)   PS：S是一个由n个连续正整数组成的数列。
问以下哪个正确
（1）S的median是正数
（2）S的median是偶数
（3）S的median是整数
- (1)

286）  .某同学走一段路程的前10miles，匀速40mile/h，剩下的20mile，匀速60mile/h，求这位同学走这段总路程的平均速度。（选项都是精确到一位小数的）
- 我的數字一樣.答案應該是51.4

336） DS: if K<0,  is M <0 ?
1) k-m<0  
2) k+m <0
- 我選E

剛想到幾題應該是新的:
* DS: A baby animal's weight increases by 4 pounds per week after its birth on January 1st, 2007. The farmer that owns this baby animal decides to get on a weight loss program so that he can lose 1 pound per week. Ask- how many whole weeks does it take for the baby animal and the farmer to weigh the same?
(1) On Jan. 1st, 2007, the farmer weighs xx times more than the baby animal
(2) 15  (number might be wrong) weeks after Jan. 1st, 2007 the farmer weight xx pounds more than the baby animal
- 我選B, 可是我不確定

*DS: Does K have remainder of 2 when divided by 3?
(1) K has remainder of 2 when divided by 6
(2) K^2 has remainder of 1 when divided by 3
- 我選A (B won't work when you use 1)

*PS: One thing's original price is $500, it is to be discounted by $150- how much is it discounted from the original price?
- 我讀了好幾遍(looks too straightforward), 應該就是 150/500=30%

*PS: (5^-3) / (0.2^5)
- (1/5^3)/((1/5)^5)= (1/5^3)*(5^5)= 5^2= 25

*DS: X^3- 4X>0, what's the solution for X?
A. -2<X<2
B. forgot
C. forgot
D. -2<X<0
E. X>2 or X<-2
- 選項應該是 -2<X<0 (我考試時選錯了...請NN確認)- function can be reduced to X(X+2)(X-2)>0

*PS: There's a set S that contains x numbers. How much greater the sum of S is in percentage than the mean of S?
- 選項中有 100x%, (x-1)100%, and others (i forgot). 我選(x-1)100%


Verbal- 42
考得比預期得好 (之前其實沒啥信心因為一些模考 (Princeton review, Manhattan gmat) 都沒考好). 我verbal沒看寂靜(覺得考場上讀比較準, 在加上我做GWD都可以剩下10mins左右, 所以沒有很擔心pace).

Reading-
*讀到了一篇GWD reading (一字不差, 真是神奇)- 是 T-4-Q24~27/TS-7-33~36 (在我的GWD24裡是 GWD-TN-12裡面的一篇). 開頭是 "Until recently, zoologists believed that all species of phocids (true seals), a pin-nipped family, use a different maternal strategy than do otariids (fur seals and sea lions), another pinniped family. 問題好像有一題不一樣. 其他的記不得了.

CR-
*A country used to have a tougher approval process for drugs produced by the pharmaceuticals eight years ago. Recently, the pharmaceuticals lobbied the government to loosen its approval process (so it's easier to get the drugs approved). However, among the recently discovered serious side effects, more of them are caused by the drugs approved under the old standard than those under the new (easier) standard. What's causing the apparent discrepancy above?
- 應該是 this one: It usually takes more than 10 years for the serious side effect of a drug to surface

AWA-
AA: The following appeared in a memorandum from the CEO of a consumer electronics manufacturing firm to the head of the company's human resources department, who is responsible for hiring new employees:
“Eight years ago, our firm’s profits were increasing with each new employee we added. We discovered that each employee had the skills and motivation to generate more revenue for the firm than his or her salary cost us. However, for the past two years, our profit margin has been falling, even though we have continued to add employees. Thus, our newer employees are not generating enough revenue to justify their salaries. We must not be hiring new employees with the same level of skills and motivation as those we used to attract. Clearly, then, failures in the human resources department account for our falling profits.”

AI: “It is difficult for people to achieve professional success without sacrificing important aspects of a fulfilling personal life.”

其他想到在寫 (現在腦子已經無法function).

附上我準備時的answer sheet-不知道有沒有幫助,不過裡面有我做GWD的紀錄(錯多少, etc.). 裡面的"Verbal" sheet是我做OG, Prep, GWD 一些統整notes (for stuff I got wrong). 如果喜歡format就拿去用. 因為我是在電腦上做題, 所以就把所有的notes and answers記錄在這裡.

Good luck everyone!

boboinsz

谢谢LZ确认JJ，也恭喜你考得这么好
也看了LZ的answer sheet，觉得你是NN，GWD正确率这么高。
我的错误率还是徘徊在6-8题左右，始终没有提高，还有一个礼拜，LZ以你的经验觉得我还有提高的空间不？

melody2120

谢谢LZ确认JJ，也恭喜你考得这么好
也看了LZ的answer sheet，觉得你是NN，GWD正确率这么高。
我的错误率还是徘徊在6-8题左右，始终没有提高，还有一个礼拜，LZ以你的经验觉得我还有提高的空间不？

-- by 会员 boboinsz (2009/12/23 7:32:57)

我覺得如果還剩一個禮拜,就持續做GWD保持手感(如果你還沒做完的話...我考前2個禮拜大概是一天一篇),在把以前錯的(OG, Prep)搞懂. 我之前是SC很弱所以that was my focus. 不管怎樣我覺得保持語感and remember the idioms/grammatical rules learned from previous errors都很重要. 加油了

boboinsz

我覺得如果還剩一個禮拜,就持續做GWD保持手感(如果你還沒做完的話...我考前2個禮拜大概是一天一篇),在把以前錯的(OG, Prep)搞懂. 我之前是SC很弱所以that was my focus. 不管怎樣我覺得保持語感and remember the idioms/grammatical rules learned from previous errors都很重要. 加油了

-- by 会员 melody2120 (2009/12/23 7:39:14)

嗯，谢谢LZ的鼓励， SC也是我的大弱项啊。

祝你申请学校顺利！进入大N校！

netbanker

NN，cong

graceguo98

NNNNN, 恭喜你啊。。
好惊人的记忆力啊
谢谢确认

netbanker

198）说X=170 Y是2位数 such that X=10的20次方-Y. 求Y
- 這有很多種可能. 要選 xxxxx00 - Y 的頭兩位加起來是8的選項 (the answer of 10^20-y will be a number with 18 digits of 9: 170-18*9=8, so 8 is the sum of the first two digits of X). For example, 47.

不知道NN还记得选哪个吗？

poorxiaodai

NN啊。我的GWD从来没有错过少于10题。唉。

cnxsixiaoxi

我也是没少过10题。。。。囧。。。
恭喜LZ

melody2120

198）说X=170 Y是2位数 such that X=10的20次方-Y. 求Y
- 這有很多種可能. 要選 xxxxx00 - Y 的頭兩位加起來是8的選項 (the answer of 10^20-y will be a number with 18 digits of 9: 170-18*9=8, so 8 is the sum of the first two digits of X). For example, 47.

不知道NN还记得选哪个吗？

-- by 会员 netbanker (2009/12/23 9:09:23)

不太記得,不過只要會這樣算應該就沒問題了 (我猜這種有很多可能性的題目GMAC也會一直換選項)...sorry