标题: 请教一道Prep DS题,不懂题意。。。 [打印本页] 作者: zhepeking 时间: 2011-1-30 12:37 标题: 请教一道Prep DS题,不懂题意。。。 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<500 (2) y<400作者: sdcar2010 时间: 2011-1-30 12:52
It should read as: If 500 is the multiple of 100 that is closest to x . . .作者: zhepeking 时间: 2011-1-30 13:05
对对,我把第一个of 100抄漏了..... 这题翻译成中文是什么意思呀。。作者: sherrycc 时间: 2011-1-30 13:07
closest to 应该是表示一个值域 总之prep答案是选E。。我昨天也做到过。。。作者: sdcar2010 时间: 2011-1-30 13:08
multiple of 100: 100, 200, 300, 400, 500, 600, . . .
Among the above candidates, 500 is the closest to x and 400 is the closest to y. Do you know which of the above numbers is closest to x+y?作者: sdcar2010 时间: 2011-1-30 13:17
Premise: 450<x<550 and 350<y<450
condition 1) 450<x<500, 800<x+y<950. The multiple of 100 could be 800, 900, condition 2) 350<y<400, 800<x+y<950. The multiple of 100 could be 800, 900 conditions 1) and 2) 450<x<500, 350<y<400, 800<x+y<900. The multiple of 100 could be 800, 900.作者: sherrycc 时间: 2011-1-30 13:30
哦我懂了。。谢谢楼上