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下面澳际小编为大家总结了gre猴哥数学难题。gre数学考试中也会出现一些难题，对gre数学考试最有效的方法就是多练习，把数学基础知识记牢，这样才能在考试中对答如流。
11. In the equation above, k, r, s, t, and v represent positive numbers. Multiplying which one of these numbers by 2 will reduce the value of n to 1/2 of its present value?
A. k B. r C.s D. t E. v
12. A certain money market account that had a balance of $48,000 during all of last month earned $360 in interest for the month. At what simple annual interest rate did the account earn interest last month?
A. 7% B.7.5% C.8% D.8.5% E.9%
13. Column A: The two-digit integer that equals twice the sum of its digits
Column B: 16
14. A car travels at an average speed of 80 kilometers per hour during a 6 - hour trip and averages 75 kilometers per hour for the first 4 hours of the trip. Which of the following distance-versus-time graphs is consistent with this information?
15. The number of households receiving monthly benits in 1960 was approximately what fraction of the number receiving monthly benits in 1975?
A. 9/10 B.5/6 C.16/27 D.11/32 E.8/35
16. When the even integer n is divided by 7, the remainder is 3.
Column A: The remainder when n is divided by 14
Column B : 10
answer: C
17. The “combined age” of a group of people is the sum of the ages of all the people in the group. Which of the following groups had the greatest combined age in 1986?
A. 20-year-old males B. 20-year-old females
C. 60- year-old males D. 60-year-old females
E. 80-year-old females
18. Approximately how many more 10-year-old children were there in 1980 than in 1986?
A. 100,000 B.200,000 C.300,000 D. 400,000 E.1,000,000
19. The population of females was greater in 1980 than in 1986 for approximately what percent of the ages from 0 to 100 years?
A. 15% B.25% C.55% D.75% E.85%
20. In 1980 the ratio of the number of males to the number of females was greatest for which of the following ages?
A. 10 B. 30 C.50 D.70 E.90
gre猴哥数学难题涉及的范围也比较广泛，考生在复习时可以要多注意日常的练习和积累。澳际小编祝大家都能取得GRE数学高分及满分!
Amy GUO 经验： 16年 案例：4272 擅长：美国,澳洲,亚洲,欧洲
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