GRE数学辅导：最新gre猴哥数学难题解析(三)

会计考友

　　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
* @( u% w) ?1 a* c5 x8 m0 k& d　　Column B: 1.4
5 u, {1 t* M, j# V　　22. If the actual temperature is 13 degrees Fahrenheit and the wind speed is 14 miles per hour, then the apparent temperature could be
9 }+ T8 s& V# c0 c
" x9 \, m/ ~/ q2 `8 V( O　　A.5 degrees Fahrenheit     B.-12 degrees Fahrenheit     C.-20 degrees Fahrenheit
( \2 l% H/ J1 z       D.-25 degrees Fahrenheit        E.-32 degrees Fahrenheit
3 m; `+ o1 s0 N* M2 E. @　　23. Which of the following can be inferred from the table?
, ]4 i* C% [: |/ O+ a4 ^0 G  b　　(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.
% S; v% K$ W( P! I+ ?3 Z　　(2).At a constant wind speed, as the actual temperature increases, the difference between the actual and the apparent temperatures also increases.
& Q1 a, s! E5 T; \* b% `- [　　(3).At a constant actual temperature of -10 degrees Fahrenheit, the apparent temperature decreases at a constant rate as the wind speed increases.
  V2 p% \* e$ T3 e( K　　A. (1)only      B.(2)only     C.(1)and(3)only      D.(2)and(3)only      E.(1)(2)and(3)