[求助]一道连题目都看不懂的GMATprep题

qingdaonycS

500 is mutiple of 100 that is closest to X and 400 is multiple of 100 that is closest to Y, what is mutiple of X and Y?

(1) X>500

(2) Y>400

答案是E，题目什么意思呢？又是怎么解答的呢？ 

kenlily

题干说500是最靠近X的整百的数，也就是说450<X<550,同理可以推出350<X<450，问X和Y的乘积。那无论哪个条件，都只能确定X和Y的范围，不能确定具体数值，所以E。

但我映像中好像问题不是这么问的呀……