# 最新GRE猴哥数学难题解析(三)

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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.

GRE数学考试中的难题涉及的范围比较广泛，考生在复习时一定要多注意日常的练习和积累。