2013年4月新gre考试：猴哥教你解gre数学难题（3）

下面为大家总结了最新的gre猴哥数学难题。有很多gre考生对gre数学考试十分苦恼，其实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。而gre数学考试中也会出现一些难题，想拿高分也十分不容易。

21.[x] represents the greatest integer less than or equal to x and [x] represents the least integer greater than or equal to x.

Column A:{[1.4]+[1.4]}/2

Column B: 1.4

22. If the actual temperature is 13 degrees Fahrenheit and the wind speed is 14 miles per hour, then the apparent temperature could be

A.5 degrees Fahrenheit B.-12 degrees Fahrenheit C.-20 degrees Fahrenheit

D.-25 degrees Fahrenheit E.-32 degrees Fahrenheit

23. Which of the following can be inferred from the table?

(1).The apparent temperature for an actual temperature of 20 degrees Fahrenheit and a wind speed of 15 miles per hour is the same as that for an actual temperature of 30 degrees Fahrenheit and a wind speed of 40 miles per hour.

(2).At a constant wind speed, as the actual temperature increases, the difference between the actual and the apparent temperatures also increases.

(3).At a constant actual temperature of -10 degrees Fahrenheit, the apparent temperature decreases at a constant rate as the wind speed increases.

A. (1)only B.(2)only C.(1)and(3)only D.(2)and(3)only E.(1)(2)and(3)

原文来源： 2013年4月新gre考试：猴哥教你解gre数学难题（3）

26. How many times between 1971 and 1991 did the price of a Brand x candy bar increase while the weight decreased?

A. one B. two C. three D. four E. five

27. Of the 500 delegates attending a convention, 200 are Republicans and the rest are Democrats. One hundred of the delegates are vegetarians and, of those who are not vegetarians, 270 are Democrats. How many of the vegetarian delegates are Republicans?

A.30 B.40 C.50 D.60 E.70

28.S is a set of n consecutive integers.

Column A: The mean of S

Column B: The median of S

answer:C

29.An airline must charge an 11 percent tax on the price of an airline ticket. The airline wishes to charge the whole-dollar amount of $433.00 for the ticket, including the tax. What price, to the nearest $0.01, should the airline set for the ticket before the tax is added?

A.$385.37 B.389.70 C.390.09 D.393.64 E.422.00

30.From the probability histogram, what is the probability that x is either 1 or 2?

A.0.35 B.0.45 C.0.50 D.0.70 E.0.75