4.22考试--请教数学题目--(5)

ruoancheng · 发表于 2011-4-20 14:52:16

Q4:

John makes wooden bowls and sells each bowl at a price that consists of his cost of making the bowl and a markup amount that is 25 percent of the selling price. What is the selling price of a bowl that cost John $60 to make?

A. $85

B. $80

C. $75

D. $70

E. $45 (B)

Q20:

For any integers x and y, min(x, y) and max(x, y) denote the minimum and the maximum of x and y, respectively. For example, min(5, 2) = 2 and max(5, 2) = 5. For the integer w, what is the value of min(10, w) ?

(1)w = max(20, z) for some integer z.

(2)w = max(10, w)

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.(D)

Q25:

If the range of the six numbers 4, 3, 14, 7, 10, and x is 12, what is the difference between the greatest possible value of x and least possible value of x ?

A. 0

B. 2

C. 12

D. 13

E. 15(D)

Q35:

In a recent election, Ms. Robbins received 8,000 votes cast by independent voters, that is, voters not registered with a specific political party. She also received 10 percent of the votes cast by those voters registered with a political party. If N is the total number of votes cast in the election and 40 percent of the votes cast were cast by independent voters, which of the following represents the number of votes that Ms. Robbins received?

A. 0.06N + 3,200

B. 0.1N + 7,200

C. 0.4N + 7,200

D. 0.1N + 8,000

E. 0.06N + 8,000 (E)

orangening · 发表于 2011-4-20 18:04:27

Q4:

设这个bowl的价钱是P，
则P=C+markup
即P=60+25%P
求得P=80

Q20:

(1)w = max(20, z) for some integer z.
可得w=Z>20
所以w>10
则min(10, w) =10

(2)w = max(10, w)
这个式子就意味着w与10相比，w更大
就像max(5, 2) = 5，那么min(5, 2) = 2
所以知道max(10, w)就能知道min(10, w)

Q25:

range=最大数-最小数

将由小到大数字排一下 3,4,7,10,14

求出这5个数的range=14-3=11

如果x加入这列数字，要使得range变成12

则x=14+1=15 或者x=3-1=2

当x=15时候，数列的range就是15-3=12
当x=2时候，数列的range就是14-2=12

所以要嘛比大的更大，要嘛比小的更小

the greatest possible x=15
the least possible x=2
相减15-2=13

这题讲得比较详细,希望你理解后遇到range的题目都能顺利得分~

Q35:

简称voters registered with a political party为Vpp好了

Vpp人数为0.6N (即N-40%N)
而Vpp中的10%投给了Ms.R,即0.6N*10%=0.06N

所以Mr.s得到的票数就是
Vpp+independent voters
=0.06N+8000

dreamgirlme · 发表于 2011-4-20 22:14:35

可以改下帖子的标题吗

ruoancheng · 发表于 2011-4-21 16:25:02

太谢谢orangening 了，要把握好题目的细节呢。
dreamgirlme，你希望我的标题改成什么样呢？

327356719 · 发表于 2011-4-21 17:31:19

把时间改掉~换成汉字的谐音

Zweistein · 发表于 2016-10-15 21:50:10

orangening 发表于 2011-4-20 18:04
Q4:设这个bowl的价钱是P，则P=C+markup即P=60+25%P求得P=80Q201)w = max(20, z) for some integer z. &nb ...

豁然开朗啊

4.22考试--请教数学题目--(5)

所属分类: GMAT考试

正在浏览此版块的会员 ()

浏览过的版块