【 – 话题作文】
第一篇:《附表18 未饱和水与过热水蒸气热力性质表》
附表18 未饱和水与过热水蒸气热力性质表{2.0747E,18}.
第二篇:《GMAT考试PREP-MATH-PS1完整详解版-V2[1].0》
PP-Problem Solving1 (PS1)
完整詳解版 V2.0
作者: pauline_chiou william0625
gman
yuma168
備註：本版權內容歸 作者 和
論壇共有，嚴禁任何未經允許的商業使用。
Revised History
由於這是眾人一起完成的,難免會有疏失,希望大家可以一起修正錯誤,讓這份詳解變得更完整! 版本增加規則如下:
1) 修正算式錯誤or提出更好的算法, 請把版本小數+1 (Ex: V1.0 -> V1.1) 2) 增加or補齊題目,請把版本個位數+1 (Ex: V2.0 ->V3.0){2.0747E,18}.
1. 409-!-item-!-187;#058&000306
A grocery store purchased crates of 40 oranges each for $5.00 per crate and then sold each orange for $0.20. What was the store's gross profit on each crate of oranges?{2.0747E,18}.
(A) $3.00 (B) $6.00 (C) $8.00 (D) $10.00 (E) $13.00
———————————————————————————————————————————— 【答案】A
【思路】revenue=cost+profit,
假設X為 the store's gross profit on each crate of oranges 0.2×40 (sold each orange for $0.20)=5( per crate)+X 8=5+X, X=3
———————————————————————————————————————————— 2. 455-!-item-!-187;#058&000316
The product P of two prime numbers is between 9 and 55. If one of the prime numbers is greater than 2 but less than 6 and the other is greater than 13 but less than 25, then P =
(A) 15 (B) 33 (C) 34 (D) 46 (E) 51
———————————————————————————————————————————— 【答案】E{2.0747E,18}.
【思路】前提是p是兩個”質數”的乘積
one of the prime numbers is greater than 2 but less than 6 包含3,5
the other is greater than 13 but less than 25 包含 17,19,23 p 可能為51,57,69,85,95,115 (又9<p<55),故答案 E
———————————————————————————————————————————— 3. 664-!-item-!-187;#058&000504
A certain taxi company charges $3.10 for the first [?] of a mile plus $0.40 for each additional of a mile. What would this company charge for a taxi ride that was 8 miles long?
(A) $15.60 (B) $16.00 (C) $17.50 (D) $18.70 (E) $19.10 4. 765-!-item-!-187;#058&000550
In a stack of boards at a lumber yard, the 20th board counting from the top of the stack is immediately below the 16th board counting from the bottom of the stack. How many boards are in the stack?
(A) 38 (B) 36 (C) 35 (D) 34 (E) 32
Practice Test #1 Problem Solving
(196 Questions)
———————————————————————————————————————————— 【答案】D
【思路】上面數下來第20個剛好在由下往上數第16個的下面→上面數下來第20個是下面數來第15個 （下面
有14個,上面有19個,在加上中心點那一個 19+14+1＝34
———————————————————————————————————————————— 5. 812-!-item-!-187;#058&000553 If , then m =
(A) 17 (B) 18 (C) 34 (D) 35 (E) 36 6. 859-!-item-!-187;#058&000568
The value of is closest to which of the following?
(A) 1 (B) 10 (C) 102 (D) 103 (E) 104 7. 905-!-item-!-187;#058&000575
For every positive even integer n, the function h(n) is defined to be the product of all the even integers from 2 to n, inclusive. If p is the smallest prime factor of h(100) + 1, then p is
(A) between 2 and 10 (B) between 10 and 20 (C) between 20 and 30 (D) between 30 and 40 (E) greater than 40
————————————————————————————————————————————
8. 1221-!-item-!-187;#058&000650
A flower arrangement consists of 30 roses, each of which is either white or red. If a rose is to be selected at random from the flower arrangement, the probability that the rose selected will be white is twice the probability that it will be red. How many white roses are in the flower arrangement?
(A) 5 (B) 10 (C) 15 (D) 20{2.0747E,18}.
(E) 25
———————————————————————————————————————————— 【答案】D
【思路】假設w=the probability of white rose, r= the probability of red rose
w30{2.0747E,18}.
2
r
30
又w+r=30,得w=20
———————————————————————————————————————————— 9. 1700-!-item-!-187;#058&001066
Last year the range of the annual salaries of the 100 employees at Company X was $30,000. If the annual salary of each of the 100 employees this year is 10 percent greater than it was last year, what is the range of the annual salaries of the 100 employees this year?
(A) $27,000 (B) $30,000 (C) $33,000 (D) $36,000 (E) $63,000
———————————————————————————————————————————— 【答案】C
【思路】Last year the range of the annual salaries of the 100 employees at Company X＝30,000
（假設最大annual salaries=50,000,最小annual salaries=20,000）
又今年比去年annual salary漲10％ 表示the range of the annual salaries of the 100
employees this year=50,000x(1.1)-20,000x(1.1)=33,000
———————————————————————————————————————————— 10. 1746-!-item-!-187;#058&002343
If a = 7 and b = -7, what is the value of 2a – 2b + b^2 ?
(A) – 49 (B) 21 (C) 49 (D) 63 (E) 77
———————————————————————————————————————————— 【答案】E
2
272(7)(7)
【思路】代入法, 2a2bb
2
=14+14+49=77
———————————————————————————————————————————— 11. 1799-!-item-!-187;#058&002415
In the figure above, the radius of the circle with center O is 1 and BC = 1. What is the area of triangular region ABC ?
(A) √2/2 (B) √3/2 (C) 1 (D) √2 (E) √3