Board logo

标题: PREP 数学-52 [打印本页]

作者: zhangpeiyu01    时间: 2006-9-19 06:18     标题: PREP 数学-52

52. If 500 is the multiple of 100 that is closest to X and 400 is the multiple of 100 that is closest to Y , which multiple of 100 is closest to X +Y

(1) X 小于500

(2) Y 小于 400

这题什么意思阿?

谢谢大家

作者: gifile    时间: 2006-9-19 12:54

If 500 is the multiple of 100 that is closest to X and 400 is the multiple of

100 that is closest to Y
从这句话,我们知道   550<x<450  ,    450<y<350, 1000<x+y<800
单独(1) X 小于500     550<x<500     1000<x+y<850   无法判断which multiple of

100 is closest to X +Y
同理,单独(2)也不行

1)2) 550<x<500  , 450<y<400   1000<x+y<900  所以  还是无法判断

选E






欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/) Powered by Discuz! 7.2