May老师,这道题在GWD的49页,我不懂为什么正确答案是infinite number of integers. 我算出来是30、60、90,所以选了C
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ken@boost.org.cn
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If 500 is the mutiple 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