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)