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GMAT考题:GMATAdvanced-PS-50
来自 : gmat.la/question/GMATAdvanced-
发布时间:2021-03-24
【记个笔记,感谢网友】从题目可得100a + 10b + c - (100c + 10b + a) = 99*(a - c) 要能被7整除——因为99不是7的倍数,所以只能是a-c是7的倍数即=7——注意!!题中规定abc都为非零数字,所以a,c只能是(9,2)和(8,1) ——所以P(abc)=2*9*1=18
2020年2月28日题库 / GMATAdvanced-PS-50The difference 942-249 is a positive multiple of 7. If a, b, and c are nonzero digits, how many 3-digit numbers abc...GMATAdvanced-PS-50, GMAT官方题库The difference 942-249 is a positive multiple of 7...GMAT考题:GMATAdvanced
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发布于 : 2021-03-24
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