赵先生将甲、乙两种股票同时卖出，其中甲种股票进价是1000元，获利20%，一种股票进价也是1000元，获利-20%，则赵

解题思路：由题意可知，王先生的年龄占四人总年龄的[1/2+1]，李先生的年龄是四人年龄和的[1/3+1]，又赵先生的年龄是其他三人年龄和的[1/4]，根据分数减法的意义，杨先生的年龄是四人年龄和的1-[1/2+1]-[1/3+1]-[1/1+4]，然后根据分数除法的意义求出四人年龄和后，即能求出王先生多少岁．

26÷（1-[1/2+1]-[1/3+1]-[1/1+4]）×[1/2+1]
=26÷（1-[1/3]-[1/4]-[1/5]）×[1/3]
=26÷[13/60]×[1/3]
=40（岁）
答：王先生40岁．

点评：
本题考点： 分数四则复合应用题．

考点点评： 首先根据王、李、赵三人分别与另外三人年龄和的比，求出三人分别占四年龄和的分率是完成本题的关键．

B

不算印花税、手续费等的费用,应该是盈利（12000X20%-10000X20%=400元）.
但是没有印花税、手续费等的费用是不可能的,所以你的盈利的400元是不够交印花税、手续费等的费的.

B

做行测这类题,一定是不能列方程计算的.
三个人的年龄和=64.
将2450约分
2丨2450
-----------------------------
5 丨1225
-------------------------
5 丨245
-------------------------
7 丨49
----------
7
2450=2×5×5×7×7
使它变成三个数相乘,且它们的和为 64
=10×5×49
-------------------------------------

获利20％
x-0.2x=1000
获利-20％
y+0.2y=1000
x=1250
y=833 +1/3
赚了1250+883+1/3-2000=130+1/3元

Dear Madam or Sir,
I’m Wei Fang（姓名的话你看情况,现在很多情况都是直接写拼音,不用颠倒姓跟名）,tenant of the Room XX（写你的房间号,一般投诉信都是写给楼管）,I'm writing to complain about Mr.Zhao,who lives in Room XX.
He always plays music to loud and makes a lot of noise.（最好写清楚怎么吵的,什么样的吵闹声）And everytime I asked him to lower the sound,he always ignored my request.
I finally could not bear it,so I am here to tell you all the awful experience.And I hope you could do something to change the situation now.Thanks a lot.
Sincerely,
Wei Fang

I saw Mr. Zhao was walking along the bank of the river yesterday evening.
有帮助请采纳。

解题思路：由题意可知，王先生的年龄占四人总年龄的[1/2+1]，李先生的年龄是四人年龄和的[1/3+1]，又赵先生的年龄是其他三人年龄和的[1/4]，根据分数减法的意义，杨先生的年龄是四人年龄和的1-[1/2+1]-[1/3+1]-[1/1+4]，然后根据分数除法的意义求出四人年龄和后，即能求出王先生多少岁．

26÷（1-[1/2+1]-[1/3+1]-[1/1+4]）×[1/2+1]
=26÷（1-[1/3]-[1/4]-[1/5]）×[1/3]
=26÷[13/60]×[1/3]
=40（岁）
答：王先生40岁．

点评：
本题考点： 分数四则复合应用题．

考点点评： 首先根据王、李、赵三人分别与另外三人年龄和的比，求出三人分别占四年龄和的分率是完成本题的关键．

既然一楼的不够长,我特意写的长了一点~
二楼的答案让我很费解,和楼主的题目完全没关系 = =
我的答案~
To Whom It May Concern:
My name is XXX,and I live in Unit X,Building X.I am terribly sorry to disturb you,however,I have a complaint that I wish to present to you.As you may know,I have lived here for many years and have made peace with many of my neighbours.However,after many tiring weekends during which peace is forever in pursuit and never obtained,I cannot possibly tolerate the loud noises caused by my neighbour,Mr.Zhao anymore.I realise that each person is entitled to his or her enjoyments,but,as we are living in an apartment,it is common accepted that while we are enjoying ourselves,we must take others’ feelings into consideration.I do not wish to impose my wishes onto others,but,if it is possible,could you please negotiate with him to reduce the noise levels to a reasonable amount on weekends,so others can rest in peace after a busy weekend.
Thank you very much.
XXX
天上~
注：写姓名的时候,一定是名字在前,姓氏在后,别忘了~

先算出甲的进价：1000×（1+20%）=1200（元）
乙的进价：1000×（1-80%）=800（元）
甲赚了有：1200-1000=200（元）
乙亏了有：1000-800=200（元）
答：赵先生在这次买卖中不赚也不赔.