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新GRE考试数学模拟题解析详解(3)

2013-06-17 
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  Sample question 2 below is based on figure 3.

  Figure 3

  Begin skippable figure description.

  Figure 3 shows parallelogram RSTU. Sides R U and S T are horizontal, with S T above, and

  slightly to the left of side R U. Diagonal S U, which extends from vertex S at the upper left of the

  parallelogram to vertex U at the lower right of the parallelogram, divides the parallelogram into

  two triangles, R S U and U S T; and the angle at vertex S into 2 adjacent angles R S U and U S T.

  The measure of angle R S U is x degrees, and the measure of angle U S T is y degrees.

  End skippable figure description.

  2.

  It is given that RSTU is a parallelogram.

  Quantity A: x

  Quantity B: y

  A. Quantity A is greater.

  B. Quantity B is greater.

  C. The two quantities are equal.

  D. The relationship cannot be determined from the information given.

  Answer: D (The relationship cannot be determined from the information given.)

  Data Interpretation Sets

  Data Interpretation questions are grouped together and refer to the same table, graph, or

  other data presentation. These questions ask you to interpret or analyze the given data. The

  types of questions may be Multiple‐choice (both types) or Numeric Entry.

  Sample Questions

  Directions: Questions 1 to 3 are based on the data in the following table.

  The table shows the percent change in monthly value of inventory at six businesses from

  April to June.

  Business

  Percent Change from April

  to May

  Percent Change from May

  to June

  G +6 +8

  K +5 minus 5

  M +2 +12

  R +8 minus 5

  V +14 0

  Z +2 minus 10

  Note: Inventory values are determined at the end of each month.

  1. If the value of inventory at Business K was $30,000 for April, what was the value of

  inventory at Business K for June?

  A. $22,500

  B. $29,925

  C. $30,000

  D. $33,000

  E. $33,075

  Answer: B ($29,925)

  2. At Business M, the value of inventory for May was what percent of the value of

  inventory for June?

  Give your answer to the nearest 0.1 percent.

  % Answer box followed by percent sign

  Answer: 89.3

  3. For which of the six businesses shown was the percent change in value of inventory

  from April to June greatest?

  A. G

  B. K

  C. M

  D. R

  E. V

  Answer: A (Business G)

  Directions: Questions 4 to 6 are based on the data shown in figure 4.

  Figure 4

  Begin skippable figure description.

  The title of the data in figure 4 is “Workforce of Country X.” The data consists of a pie chart

  and a bar graph. The title of the pie chart is “Percent Distribution of Workforce by Employment

  Sector” and the title of the bar graph is “Workforce in the Service Sector by Area and Gender.”

  The percent distribution of the workforce by employment sector in the pie chart is as follows:

  Professional Sector 20%.

  Service Sector 15%

  Construction and Maintenance Sector 10%

  Production and Transportation Sector 15%

  Other Sector 15%

  Sales Sector 10%

  Management Sector 15%

  The bar graph shows the number of males and females in each of the five service sectors. The

  bar graph has horizontal bars. The graph has a horizontal axis labeled Millions of People, with

  vertical gridlines in multiples of 0.5 million, from 0.5 million to 4 million. Five Service Sector

  areas are listed along the vertical axis. The data in the bar graph is as follows:

  Health Care Sector, 0.5 million males and 2.75 females

  Protective Service Sector, a little under 2 million males and 0.5 million females

  Food Service Sector, a little under 3 million males and a little under 4 million females

  Personal Care Sector, a little over 0.5 million males and about 2.75 million females

  Other Sector, a little under 3 milllion males and a little under 2 million females

  End skippable figure description.

  4. Approximately how many people are in the production and transportation sector of the

  workforce?

  A. 9 million

  B. 12 million

  C. 15 million

  D. 18 million

  E. 21 million

  Answer: E (21 million)

  5. In the workforce, the ratio of the number of males to the number of females is the

  same for the sales sector as it is for the protective service area of the service sector. Which of the

  following is closest to the number of females in the sales sector?

  A. 2.9 million

  B. 3.6 million

  C. 10.4 million

  D. 11.1 million

  E. 14.0 million

  Answer: A (2.9 million)

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