10/10
1. 1 gram的什么东东含有70%的人体一日所需的维生素E和30%的人体一日所需的维生素A。请问,如果要补给人体一日需要的维生素E和A,请问要吃多少GRAM的此类东东。
答案3, 10, 14, 21,33,前两个选项记得不清楚了,SORRY)
is answer 21??
2. .1-99 inclusive, what’s the possibility of n(n+1) is a multiple of 3?
3. a base salary 6,000 and a commission 7% of the week’s sale over 2,000, last week and this week’s salary is 8100 and 10200, how much the total sale of the two weeks?
4. DS
上层架放了45个咚咚,下层架放了44各咚咚。上层的45个每个的重量都小于下层44个的任何一个。问共89个的median?
1.上层中最重的重量是8。
2.下层中最轻的重量是8.1。
答案:A
5. 12个黑馒头,12个白馒头,随机吃。先吃了三个黑的。问下一个馒头是黑馒头的概率?
答案:3/7
///////请问条件概率公式怎么用?
6. 学生学习课程,同时学A,B的16人,同时学BC的17人,同时学CA的18人,问同时学ABC的人数?
1.同时学AB的学生当中,有9人学C
2.学A的有30人,学B的有35人,学C的有40人。
答案:D
///////我觉得选A吧。不知到总人数,2求不出来ABC。因为I=A+B+C-AB-AC-BA+ABC
对吗?
7. .DS: 两班学生考试, A and B, the scores show that means of A and B are 84 and 78, respectively, Median of A and B are 75 and 82, respectively. Does the mean of A+B greater than the median of A+B?
1) I forgot… 2) the number of students in A and B is 43 and 37.
【讨论】条件1待补充,由条件2可得A+B 的mean3?
1. the tenth digit of x is 5
2. the tenth digit of y is 9
我的选择: A
////对吗??
18.
.一三角形ABC,X点位于AC中点,Y点位于BC中点,R点位于XC中点,S点位于YC中点,问三角形SRC的面积
(1)三角形ABX面积为32
(2)ABC中的其中一条高为9
////我认为选E
unanswered=================================================================================================================================================================================================10/11/02
1. DS: K^4的个位数是? 1) K is not divisible by 5 2) K is divisible by 2
2. 某东东裂变。Triple in every 30min, what is the number of it after 4 hours divided by that in 2 hours?
/////what’s the meaning of “after 4 hours divided by that in 2 hours”???
3. A集合中的45个数都比B中的44个数字小问 A+B的median?1)A中的最大的数字是60 2) B 中最小的是60
//////is the answer “E”??? because we don’t know how the numbers are arranged
4. 3个泵灌一个水池分别需2,4,8个小时,如果3个泵同时工作(原先还以为是工程问题),再看问题:下面那个比例水池的水被灌完成的速度最快?(不就是比大小吗,折腾了半天,答案好象是1/7)
//// what’ s the meaning of this question??
5. 商店卖某东东,售价2240元的时候利润是40%,问利润50%时售价应是多少?(2400)
///// why my answer is 2688 ????
6. 两个人开车,相距多少miles(有具体数字),问B追上A需要多少时间?(A)
(1) B每小时比A快4miles
(2) B每小时170miles
////// Is A right??
7. DS 问正整数N=?
(1) N 除以3的6余数为1
(2) N除以3的余数为2
8.S^2+R^2的square roots 是整数吗?
(1) S+R=9
(2) S〈R
//////我认为选A 对吗??
9. N*=N^2+1,K*=?
(1) K^2除以4余1
(2) K*大于18小于等于36
//////我认为选C
10. 4 entrees, one of them is “fish”, 15 people, Q: is there at least 1 person order “fish”?
(1)there are no any entrees ordered by more than 5 people
(2)one dish less than 4 people ordered …(something like this)…
### (C) …(SURE)
///////我认为选E,NOT ……MORE THAN 5则可以5,5,5而且0〈4
这样想对吗
11.DS: 两班学生考试, A and B, the scores show that means of A and B are 84 and 78, respectively, Media of A and B are 75 and 82, respectively. Does the mean of A+B greater than the media of A+B?
A) I forgot… B) the number of students in A and B is 43 and 37.
------------------------------------------------------------------
E
条件B):平均值=81。A、B两班和起来,共80人,中数为40+41的和。
根据题目,A班中有22人多于75分,B班有19人多于82分。即41人多于75分,但不能确定是否多于80分。
/////宝典中有一道很相似的题:
DS: 两班学生考试, A and B, the scores show that means of A and B are 82 and 74, respectively, Media of A and B are 80 and 78, respectively. Does the mean of A+B greater than the media of A+B?
A) A+B=77 B) the number of students in A and B is 37 and 40
答案是B
这是为什么???
12. DS
上层架放了45个咚咚,下层架放了44各咚咚。上层的45个每个的重量都小于下层44个的任何一个。问共89个的median?
1.上层中最重的重量是8。
2.下层中最轻的重量是8.1。
答案:A
///////并不能保证上层中的第45个是最重的一个呀????
13.The number of boys in a class and the number of the totle of boys and girls who take the course of biology is shown in the form blew, How many is all the boys and girls in the class.
表格 take biology not take biology totle
----------------------------------------------------------
boy M N 28
----------------------------------------------------------
girl A B X
----------------------------------------------------------
totle 36 Y
1. There are 3 boys who do not take biology
2. The girls in the class is twice as many as the totle of boys and girls who do not take biology
-------------------------------------
C
==================================
////// 我认为选B
M+N=28 A+B=X M+A=36 N+B=Y 36+Y=28+X 求28+X=?
1) N=3
2) X=2(N+B)=2Y=2(28-36+X)= —16+2X
X=16
28+X=44作者: tongxun 时间: 2002-10-12 23:39