数学JJ总汇 (9/25 上午9:30更新至479题)

cfmolly

1.        A set S consists of odd integers, the minimum is 18, and the maxim is 60. The median is 54. Is this number of integers in this set larger than 15?(大致意思是这样)
            

(1)the average is equal to the median
            

(2)the sum of integers is 700
                

 支持winsn  應該選C吧!

 不知道其他NN是怎麼想的?

emmaw

72题：

1.        一个集合｛2,4,8,10,x}，x=?
            

1) 算朮平均数和中位数相等
            

2）x不等于16

楼主选C，我觉得选E啊，x可能等于-4

请大家讨论啊

ada3063

1.      连续整数集合，是否其中有数字能被8整除？
                

1)9和15在这个数列里
            

2)一共十个整数
        

第2个条件的问题是，0能否被8整除？

不知道gmat是怎么规定的？

hasusky

第6题~

1.        [a] is the smallest integer with a value larger than a. What is [a]-?
                    

1. a-b=1.5
                    

2. 忘了   
                    

条件一 IF a=2.5, b=1, [a]-=3-1=2

the smallest integer with a value larger than a  这个假设里面b=1 似乎不成立吧~  题目没说可以equal to a 呀？ 

simonleon

1.        A financial investment club has A members with investment either in bond or in stocks. B don't invest in either of them. C  invest in stock. D invest in bond. How many people invest in both?
                

Both= C+D-A

我觉得应该是（C+D-A)/2，请指教！

jingnan

关于第8题
    

1.        A
financial investment club has A members with investment either in bond
or in stocks. B don't invest in either of them. C  invest in stock. D
invest in bond. How many people invest in both?
                

Both= C+D-A

我觉得应该是（C+D-A)/2，请指教

同意！

hsu_2008

  

1. 2^31-2^32+2^33=?

2.  0.25(20^8)=? 

本人数学很菜， 想请教上面两题怎么算出来啊！谢谢！！！

hsu_2008

错了，第一道是2^31-2^32+2^33=?

第二道是 0.25(20^8)=? 

万分感谢！！！

asiancraps

请问第八题

A financial investment clubb has A members with investment either in bond or in stocks. B don't invest in either of them. C invest in stock. D invest in bond. How many people invest in both?

答案为什么是 C+D-A 而不是 C+D-A 除以二呢?

如果以画圈的方式 C+D 所涵盖的中间部分不是重复了吗?

请NN解答 谢谢

kwithk

已更新