ChaseDream
标题: 小妹先预祝各位大牛新春快乐!!求教GWD数学!!!!谢主隆恩!!! [打印本页]
作者: sweetmop 时间: 2013-5-4 22:52
标题: 小妹先预祝各位大牛新春快乐!!求教GWD数学!!!!谢主隆恩!!!
Q11:
Ina corporation, 50 percent of the male employees and 40 percent of the femaleemployees are at least 35 years old. If42 percent of all the employees are at least 35 years old, what fraction of theemployees in the corporation are females?
A. 3/5
B. 2/3
C. 3/4
D. 4/5
E. 5/6
我如是做:50%ME+40%FE=42%E 接着我就傻了~ 不知道该咋办了~ 大牛牛们 帮帮~~
Q14:
If1050 – 74 is written as an integer in base 10 notation, what is thesum of the digits in that integer?
A. 424
B. 433
C. 440
D. 449
E. 467
这个74咋办???求教!!!
Q16:
IfJ, S, and V are points on the number line, what is the distance between S andV?
(1) The distance between J and S is 20.
(2) The distance between J and V is 25.
A.Statement (1) ALONE is sufficient, but statement (2) alone is notsufficient.
B.Statement (2) ALONE is sufficient, but statement (1) alone is notsufficient.
C.BOTH statements TOGETHER are sufficient, but NEITHER statementALONE is sufficient.
D.EACH statement ALONE is sufficient.
E.Statements (1) and (2) TOGETHER are NOT
大牛们~是不是只有得出一个唯一的答案,才算符合标准啊~两个答案并在一起可以得出好多种答案,这样不算得出答案么?
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Q17:
InTown X, 64 percent of the population are employed, and 48 percent of thepopulation are employed males. Whatpercent of the employed people in Town X are females?
A. 16%
B. 25%
C. 32%
D. 40%
E. 52%
这个难道不是这样么?(1-48%)64%P=33.28%???但是答案是B
Q25:
Aphotographer will arrange 6 people of 6 different heights for photograph byplacing them in two rows of three so that each person in the first row isstanding in front of someone in the second row. The heights of the people within each row must increase from left toright, and each person in the second row must be taller than the personstanding in front of him or her. Howmany such arrangements of the 6 people are possible?
A. 5
B. 6
C. 9
D. 24
E. 36
这个题不管我的脑子咋想,都觉得只有一种排法……可能我脑子不好使吧。
Q27:
Ifn = 811 – 8, what is the units digit of n?
A. 0
B. 1
C. 4
D. 6
E. 8
Answer:C
这种题有什么一个通用的做法吧~ 但是我不知道诶~ 求教求教!!!!
Q28:
Forany positive integer n, the sum of the first n positive integers equals[n(n+1)]/2. What is the sum of all theeven integers between 99 and 301?
A. 10,100
B. 20,200
C. 22,650
D. 40,200
E. 45,150
Answer:
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Q29:
June25, 1982, fell on a Friday. On which dayof the week did June 25, 1987, fall? (Note: 1984 was a leap year.)
A. Sunday
B. Monday
C. Tuesday
D. Wednesday
E. Thursday
这个有啥规律呢?大牛牛们~
Q33:
Isxy > x/y?
(1) xy > 0
(2) y < 0
A.Statement (1) ALONE is sufficient, but statement (2) alone is notsufficient.
B.Statement (2) ALONE is sufficient, but statement (1) alone is notsufficient.
C.BOTH statements TOGETHER are sufficient, but NEITHERstatement ALONE is sufficient.
D.EACH statement ALONE is sufficient.
E.Statements (1) and (2) TOGETHER are NOT sufficient.
这种题要分正负数想嘛??
求教!!!!!!谢恩!!!!
作者: sweetmop 时间: 2013-5-5 07:34
为什么同学们都不理我 如果觉得大家觉得这些题很弱智最起码也骂我一句脑残啊 一直以为CDer是很ardent的 呵呵。
作者: 鞋鞋鞋 时间: 2013-5-5 08:42
马上就要走了,帮顶
作者: sweetmop 时间: 2013-5-5 09:08
祝鞋鞋鞋同学一路顺风 留学开心~ 我继续坐等好心的同学帮我解答~
作者: 鞋鞋鞋 时间: 2013-5-5 17:28
sweetmop 发表于 2013-5-5 09:08 ![](static/image/common/back.gif)
祝鞋鞋鞋同学一路顺风 留学开心~ 我继续坐等好心的同学帮我解答~
亲,我表达错误,早上是赶着出去训练,我是14fall的,一起加油哈~
作者: kevinh1217 时间: 2013-5-5 18:53
Q14 Q27 看不懂 Q25求大牛, 29和33是E么 Q28为什么我算出来的是20100
作者: sweetmop 时间: 2013-5-6 02:54
33是E的好像 我现在脑子已经木了 明天给好心的同学确认下 咱们一起坐等大牛的出现 晚安
作者: sweetmop 时间: 2013-5-6 02:55
鞋鞋鞋 发表于 2013-5-5 17:28 ![](static/image/common/back.gif)
亲,我表达错误,早上是赶着出去训练,我是14fall的,一起加油哈~
Me2 共勉
作者: 鞋鞋鞋 时间: 2013-5-6 08:47
我也是个菜菜哈,尝试着做一下,哪里不对欢迎指正,共同进步,O(∩_∩)O~
11.设男X,女Y
50%*X+40%*Y=42%(X+Y)
8%*X=2%Y
4X=Y
女的比例Y/(X+Y)=4/5
14.题目是10的50次方减74,10的50次方是1后面50个0,减74,就有999.....99926,一共50-2=48个9,所以48*9+2+6=440
16.1+2得出的情况不唯一,所以不可以啊,这个答案不能存在多种可能性。
17.设有工作的男性人数为X, 有工作的女性人数为Y
(X+Y)/64%=总人数=X/48%
X/(X+Y)=48/64=3/4
职场中,女性比为Y/(X+Y)=1/4
25.设这六个人按身高从低向高排为ABCDEF
A最矮,F最高
所以一定是 **F
A**
只要确定了第一排的二三位,就能确定整个队形
所以当第二位是B时,第三位可以是CDE
当第二位是C时,第三位可以 DE
其他情况不符合条件,所以一共有5种排法。楼主可以枚举一下。
27.题目应该是8^11-8,遇到这种题目我都是写出它们的个位数然后规律就出来了
8^1 个位是8
8^2 个位是4
8^3 个位是2
8^4 个位是6
8^5 个位是8,即4个一循环,8^11个位是2, 8^11-8个位就是4 选C
28.首项为100,末项300,d=2, 等差数列求和20200
29.平年一年365天,一周7天,365除以7余数为1,所以每年相同的日子要往后推一天,但是闰年是366天,余数为2,所以往后推2天,这样下来,83,84,85,86,87分别要推1,2,1,1,1一共6天,所以本来是周五的,就变成了周四。选E
33.1:xy>0 可以是(-1)*(-1/2)也可以是(-1)*(-2)NS
2:y<0 ,不知道x的情况,NS
1+2: x<0 y<0 见情况一,NS。所以选E
作者: kevinh1217 时间: 2013-5-6 10:16
鞋鞋鞋 发表于 2013-5-6 08:47 ![](static/image/common/back.gif)
我也是个菜菜哈,尝试着做一下,哪里不对欢迎指正,共同进步,O(∩_∩)O~
11.设男X,女Y
你好,28还是不太明白, 100-300之间一共201个数 ,之间偶数的和不应该是前者的一半吗? 我用(A1+An)*n/2 得出100-300所有数的和,然后再除2就变成20100了,求牛牛指点。。
还有想请教下100-300之间有多少偶数是怎么判断的??谢谢
作者: 鞋鞋鞋 时间: 2013-5-6 11:16
kevinh1217 发表于 2013-5-6 10:16 ![](static/image/common/back.gif)
你好,28还是不太明白, 100-300之间一共201个数 ,之间偶数的和不应该是前者的一半吗? 我用(A1+An)*n/2 ...
题目中给的是99到301啊,总共是203个数字,因为是奇数起奇数落,所以奇数肯定要比偶数多一个,偶数就是101个。或者你从100,102...300也可以判断的。
【(101+300)*101】/2就好了
非牛,共同进步哈~
作者: kevinh1217 时间: 2013-5-6 14:22
鞋鞋鞋 发表于 2013-5-6 11:16 ![](static/image/common/back.gif)
题目中给的是99到301啊,总共是203个数字,因为是奇数起奇数落,所以奇数肯定要比偶数多一个,偶数就是10 ...
明白了,谢谢哈
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