GRE-89及答案解析.doc

1、GRE-89及答案解析(总分：25.00，做题时间：90 分钟)一、SECTION 1(总题数：23，分数：25.00)1.A certain doctor suggests that an individuals daily water intake be ounce per pound of body weight plus 8 ounces for every 25 pounds by which the individual exceeds his or her ideal weight. If this doctor suggests a daily water intake of

2、136 ounces for a particular 240-pound individual, how many pounds above his or her ideal weight is that individual?A. （分数：1.00）A.B.C.D.E.2.The 20 people at party are divided into n mutually exclusive groups in such a way that the number of people in any group does not exceed the number in any other

3、group by more than 1.（分数：1.00）A.B.C.D.3.A number is a palindrome if it reads exactly the same from right to left as it does from left to right. For example, 959 and 24742 are palindromes.（分数：1.00）A.B.C.D.4.The average (arithmetic mean) number of trees per acre in a 40-acre plot is 140. If a 10-acre

4、section of the plot contains 90 trees per acre, how many trees are there in the remaining 30 acres?A. 5,700 B. 4,700 C. 4,200D. 3,600 E. 2,700（分数：1.00）A.B.C.D.E.5.A political poll showed that 80 percent of those polled said they would vote for proposition P. Of those who said they would vote for pro

5、position P, 70 percent actually voted for P, and of those who did not say they would vote for P, 20 percent actually voted for P. What percent of those polled voted for P?A. 56% B. 60% C. 64%D. 76% E. 90%（分数：1.00）A.B.C.D.E.6. （分数：1.00）A.B.C.D.E.7.If revenues of $196,000 from division A of Company X

6、represent 28 percent of the total revenues of Company X for the year, what were the total revenues of Company X for the year?A. $141,100 B. $ 272,000C. $ 413,300 D. $ 596,100E. $ 700,000（分数：1.00）A.B.C.D.E.8.The perimeter of rectangle RSTU is 750, and RS = 350（分数：1.00）A.B.C.D.9. （分数：1.00）A.B.C.D.10.

7、分数：1.00）A.B.C.D.11.There are 100 people on a line. Aviva is the 37th person and Naomi is the 67th person. If a person on line is chosen at random, what is the probability that the person is standing between Aviva and Naomi?（分数：1.00）填空项 1:_12.How many positive 4-digit integers begin (on the left) wi

8、th an odd digit and end with an even digit?A. 250 B. 500 C. 2,000D. 2,500 E. 5,000（分数：1.00）A.B.C.D.E.13.For a project, a square piece of cloth is folded in half and sewed together to form a rectangle that has a perimeter of 36 centimeters. What was the area in square centimeters of the piece of clot

9、h before it was folded?A. 16 B. 36 C. 81D. 108 E. 144（分数：1.00）A.B.C.D.E.14.In a group of 80 students, 24 are enrolled in geometry, 40 in biology, and 20 in both. If a student were randomly selected from the 80 students, what is the probability that the student selected would not be enrolled in eithe

10、r course?A. 0.20 B. 0.25 C. 0.45D. 0.55 E. 0.60（分数：1.00）A.B.C.D.E.15.Rectangular region QRST is divided into four smaller rectangular regions, each with length l and width w.（分数：1.00）A.B.C.D.16.In a crate of fruit that contained strawberries, blueberries, and raspberries, the ratio of the number of

11、pints of strawberries to the number of pints of blueberries to the number of pints of raspberries was 6 to 4 to 5, respectively. If the crate contained a total of 45 pints of these fruits, how many more pints of strawberries than blueberries were there in the crate?A. 2 B. 3 C. 4D. 5 E. 6（分数：1.00）A.

12、B.C.D.E.17. （分数：1.00）A.B.C.D.18.S is the sum of the first n negative integer powers of 2, i.e., S=2-1+2-2+ . +2-n.（分数：1.00）A.B.C.D.19.In a group of 100 students, more students are on the fencing team than are members of the French club. If 70 are in the club and 20 are neither on the team nor in the

13、 club, what, is the minimum number of students who could, be both on the team and in the club?A. 10 B. 49 C. 50D. 60 E. 61（分数：1.00）A.B.C.D.E.20. （分数：1.00）A.B.C.D.21.If the vertices of a triangle have rectangular coordinates (0, 0), (8, 0), and (8, 6) respectively, then the perimeter of the triangle

14、isA. 10 B. 14 C. 24D. 36 E. 48（分数：1.00）A.B.C.D.E.（分数：3.00）(1).For which country was the ratio of its savings rate to its real GNP growth rate greatest?A. Japan B. Canada C. AustraliaD. Italy E. Switzerland（分数：1.00）A.B.C.D.E.(2).For how many of the countries shown was the savings rate more than 5 tim

15、es the real GNP growth rate?A. Five B. Four C. ThreeD. Two E. One（分数：1.00）A.B.C.D.E.(3).Which of the following statement can be inferred from the graph? On the average, people in the United States saved about the same amount as people in the United Kingdom. The median of the savings rates for the ei

16、ght countries was greater than 11 percent. Only two of the countries had a higher savings rate than Italy.A. only B. only C. onlyD. and E. and （分数：1.00）A.B.C.D.E.22.At a sale, the cost of each tie was reduced by 20 percent and the cost of each belt was reduced by 30 percent.（分数：1.00）A.B.C.D.GRE-89答案

17、解析(总分：25.00，做题时间：90 分钟)一、SECTION 1(总题数：23，分数：25.00)1.A certain doctor suggests that an individuals daily water intake be ounce per pound of body weight plus 8 ounces for every 25 pounds by which the individual exceeds his or her ideal weight. If this doctor suggests a daily water intake of 136 ounce

18、s for a particular 240-pound individual, how many pounds above his or her ideal weight is that individual?A. （分数：1.00）A.B.C.D. E.解析：2.The 20 people at party are divided into n mutually exclusive groups in such a way that the number of people in any group does not exceed the number in any other group

19、 by more than 1.（分数：1.00）A.B.C.D. 解析：3.A number is a palindrome if it reads exactly the same from right to left as it does from left to right. For example, 959 and 24742 are palindromes.（分数：1.00）A.B.C. D.解析：4.The average (arithmetic mean) number of trees per acre in a 40-acre plot is 140. If a 10-ac

20、re section of the plot contains 90 trees per acre, how many trees are there in the remaining 30 acres?A. 5,700 B. 4,700 C. 4,200D. 3,600 E. 2,700（分数：1.00）A.B. C.D.E.解析：5.A political poll showed that 80 percent of those polled said they would vote for proposition P. Of those who said they would vote

21、for proposition P, 70 percent actually voted for P, and of those who did not say they would vote for P, 20 percent actually voted for P. What percent of those polled voted for P?A. 56% B. 60% C. 64%D. 76% E. 90%（分数：1.00）A.B. C.D.E.解析：6. （分数：1.00）A.B.C. D.E.解析：7.If revenues of $196,000 from division

22、A of Company X represent 28 percent of the total revenues of Company X for the year, what were the total revenues of Company X for the year?A. $141,100 B. $ 272,000C. $ 413,300 D. $ 596,100E. $ 700,000（分数：1.00）A.B.C.D.E. 解析：8.The perimeter of rectangle RSTU is 750, and RS = 350（分数：1.00）A.B. C.D.解析：9

23、 （分数：1.00）A. B.C.D.解析：10. （分数：1.00）A.B.C.D. 解析：11.There are 100 people on a line. Aviva is the 37th person and Naomi is the 67th person. If a person on line is chosen at random, what is the probability that the person is standing between Aviva and Naomi?（分数：1.00）填空项 1:_ （正确答案： ）解析：12.How many posit

24、ive 4-digit integers begin (on the left) with an odd digit and end with an even digit?A. 250 B. 500 C. 2,000D. 2,500 E. 5,000（分数：1.00）A.B.C.D. E.解析：13.For a project, a square piece of cloth is folded in half and sewed together to form a rectangle that has a perimeter of 36 centimeters. What was the

25、area in square centimeters of the piece of cloth before it was folded?A. 16 B. 36 C. 81D. 108 E. 144（分数：1.00）A.B.C.D.E. 解析：14.In a group of 80 students, 24 are enrolled in geometry, 40 in biology, and 20 in both. If a student were randomly selected from the 80 students, what is the probability that

26、the student selected would not be enrolled in either course?A. 0.20 B. 0.25 C. 0.45D. 0.55 E. 0.60（分数：1.00）A.B.C. D.E.解析：15.Rectangular region QRST is divided into four smaller rectangular regions, each with length l and width w.（分数：1.00）A.B.C. D.解析：16.In a crate of fruit that contained strawberries

27、 blueberries, and raspberries, the ratio of the number of pints of strawberries to the number of pints of blueberries to the number of pints of raspberries was 6 to 4 to 5, respectively. If the crate contained a total of 45 pints of these fruits, how many more pints of strawberries than blueberries

28、 were there in the crate?A. 2 B. 3 C. 4D. 5 E. 6（分数：1.00）A.B.C.D.E. 解析：17. （分数：1.00）A. B.C.D.解析：18.S is the sum of the first n negative integer powers of 2, i.e., S=2-1+2-2+ . +2-n.（分数：1.00）A.B. C.D.解析：19.In a group of 100 students, more students are on the fencing team than are members of the Frenc

29、h club. If 70 are in the club and 20 are neither on the team nor in the club, what, is the minimum number of students who could, be both on the team and in the club?A. 10 B. 49 C. 50D. 60 E. 61（分数：1.00）A.B.C.D.E. 解析：20. （分数：1.00）A. B.C.D.解析：21.If the vertices of a triangle have rectangular coordinat

30、es (0, 0), (8, 0), and (8, 6) respectively, then the perimeter of the triangle isA. 10 B. 14 C. 24D. 36 E. 48（分数：1.00）A.B.C. D.E.解析：（分数：3.00）(1).For which country was the ratio of its savings rate to its real GNP growth rate greatest?A. Japan B. Canada C. AustraliaD. Italy E. Switzerland（分数：1.00）A.B

31、C.D.E. 解析：(2).For how many of the countries shown was the savings rate more than 5 times the real GNP growth rate?A. Five B. Four C. ThreeD. Two E. One（分数：1.00）A.B.C.D. E.解析：(3).Which of the following statement can be inferred from the graph? On the average, people in the United States saved about

32、the same amount as people in the United Kingdom. The median of the savings rates for the eight countries was greater than 11 percent. Only two of the countries had a higher savings rate than Italy.A. only B. only C. onlyD. and E. and （分数：1.00）A.B. C.D.E.解析：22.At a sale, the cost of each tie was reduced by 20 percent and the cost of each belt was reduced by 30 percent.（分数：1.00）A.B.C.D. 解析：