Q26:
Running at their respective constant rates, machine X takes 2 days longer to produce w widgets than machine Y. At these rates, if the two machines together produce 5/4 w widgets in 3 days, how many days would it take machine X alone to produce 2w widgets?
A. 4
B. 6
C. 8
D. 10
E. 12
Q17:
To be eligible for retirement benefits at the Omega Corporation, the sum of an employee’s age, in years, and the number of years of employment must be at least 70. If x, where x < 70, is a certain employee’s age when hired and y is the minimum number of years of employment required for the employee to be eligible for retirement benefits, which of the following equations represents the relationship between x and y ?
A. xy = 70
B. x + y = 70
C. 2x + y = 70
D. x + 2y = 70
E. 2x + 2y = 70
Q10
The sides of a square region, measured to the
nearest centimeter, are 6 centimeters long. The
least possible value of the actual area of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm
Q23.
At a fruit stand yesterday, the price of each apple was $0.10 more than the price of each orange. What was the total revenue from the sale of oranges at the fruit stand yesterday?
(1) The number of oranges sold at the fruit stand
yesterday was 5 more than the number of
apples.
(2) The total revenue from the sale of apples
at the fruit stand yesterday was $15.00
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
l Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient
l BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
l EACH statement ALONE is sufficient
l Statements (1) and (2) TOGETHER are NOT sufficient
Q26,把答案带进去验算,得出12
Q17,聘用时年龄+工龄=实际年龄,实际年龄+工龄=70,选D
Q10,5.5*5.5=30.25,小于这个的错,选E
Q23,苹果价格为a,则橘子是a-0.1;苹果个数为b,则橘子是b+5。相乘得到2元1次方程。解不出来的。选B
Q26,把答案带进去验算,得出12
Q17,聘用时年龄+工龄=实际年龄,实际年龄+工龄=70,选D
Q10,5.5*5.5=30.25,小于这个的错,选E
Q23,苹果价格为a,则橘子是a-0.1;苹果个数为b,则橘子是b+5。相乘得到2元1次方程。解不出来的。选B
谢谢指点!
不过恕在下愚钝,还是有几个地方不太明白:
Q26,不清楚是怎么带进去验算的?还请说明过程。
Q10主要是不明白题目的意思,我知道这里不好画图。可不可以用中文解释一下?
Q23,如果解不出来,为何选B? 按照你的设定,就是多了ab=15; 要算的是(b+5)(a-0.1)=?
因为不可能知道苹果和橘子的具体数量,所以是无法计算收入。那应该选D啊?
Q10
The sides of a square region, measured to the
nearest centimeter, are 6 centimeters long. The
least possible value of the actual area of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm
应该是说,边长近似等于6,那么最短是5.5, 所以,面积最少是30.25, 所以这个题是D,我这两天刚做过,应该就是这个答案
Q10
The sides of a square region, measured to the
nearest centimeter, are 6 centimeters long. The
least possible value of the actual area of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm
应该是说,边长近似等于6,那么最短是5.5, 所以,面积最少是30.25, 所以这个题是D,我这两天刚做过,应该就是这个答案
谢谢,我就是不知道哪个句子是说明边长近似等于6,那么最短是5.5?why?
谢谢指点!
不过恕在下愚钝,还是有几个地方不太明白:
Q26,不清楚是怎么带进去验算的?还请说明过程。
Q10主要是不明白题目的意思,我知道这里不好画图。可不可以用中文解释一下?
Q23,如果解不出来,为何选B? 按照你的设定,就是多了ab=15; 要算的是(b+5)(a-0.1)=?
因为不可能知道苹果和橘子的具体数量,所以是无法计算收入。那应该选D啊?
我觉得是2个条件分别都算不出来。.都用上也算不出来.
那不是选E么?
Statements (1) and (2) TOGETHER are NOT sufficient
Q26, 可以得出两个式子,然后就带入验证,是一个好办法:
W/y+2=W/x
5/12w=x+y
谢谢指点!
不过恕在下愚钝,还是有几个地方不太明白:
Q26,不清楚是怎么带进去验算的?还请说明过程。
Q10主要是不明白题目的意思,我知道这里不好画图。可不可以用中文解释一下?
Q23,如果解不出来,为何选B? 按照你的设定,就是多了ab=15; 要算的是(b+5)(a-0.1)=?
因为不可能知道苹果和橘子的具体数量,所以是无法计算收入。那应该选D啊?
不好意思,23是笔误,是E。(单个二元一次方程无解)(考试这样就死了)
Q10,一个正方形边长四舍五入是6,那么最不可能的面积是:小于30.25是不可能的
Q26我想正解,太复杂,就用验算了。先带入8。X生产2w 要8天,则生产w要4天,那么Y要2天。X和Y一起生产3天就是3w/4+3w/2=9w/4 大于5w/4。所以生产时间长于8天。再次带入10天和12天验算
谢谢各位了。
真是头晕啊,自己也是出这些低级错误!希望考试没这么选错的!
1。 Assume X needs x days to finish W, and Y needs y days to finish W.
Condition (1): x = y+2
Condition (2): (1/x+1/y)* 3 = 5/4
From (1)(2) we can get x = 6 and y = 4. Therefore 2x = 12, Answer (E)
2. x+y + y = 70
3. To round up to the nearest 6 cm, the side length a must be equal or greater than 5.5 cm. Therefore Area >= 5.5*5.5 = 30.25
So (D) is the least possible
4 (E) as discussed above.
4.
Q10,一个正方形边长四舍五入是6,那么最不可能的面积是:小于30.25是不可能的
对于这个题目,我有不同意见,那句The
least possible value of the actual area of the
square region 我理解应该是:可能的最小面积,而不是最不可能的面积,未知对否?
least possible value of the actual area of the
square region
我以为应该是:可能的最小面积,而不是最不可能的面积,希望牛人指点
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