1、If k is a positive integer, is k the square of an integer?
(1) k is divisible by 4.
(2) k is divisible by exactly 4 different prime numbers.
这道题我选的B，我的理解是K正好被四个不同的质数整除，但答案是E。我的理解对吗？盼指点!
2、In the xy-plane, what is the x-intercept of a certain line?
(1) The line passes through the point (0,2).
(2) The y-intercept of the line is 2.
这题我选的C，但答案是E，难道我对intercept的概念理解有误？在我的印象中截距是分正负的呀，那么已知两点，不就可以定义一条直线吗？X的截距不也可以求出吗？
3、For each landscaping job that takes more than 4 hours, a certain contractor charges a total of r dollars for the first 4 hours plus 0.2r dollars for each additional hour or fraction of an hour, where r > 100. Did a particular landscaping job take more than 10 hours?
(1) The contractor charged a total of $288 for the job.
(2) The contractor charged a total of 2.4r dollars for the job.
答案是B，这道题我不会做
请路过的朋友们指点指点吧! | 
