设有X人,并设X是3位数X-4是5的倍数,故X-4个位是0或5,X个位是4或9若X个位是4:1、X-8是9的倍数,X-8个位是6,故X-8的前两位可能是:03,12,21,30,39,48,57,66,75,84,93X=044,134,224,314,404,494,584,674,764,854,9442、X是11的倍数故X=44不满足X-6是7的倍数若X个位数是9:1、X-8是9的倍数,X-8个位是1,故X-8的前两位可能是:08,17,26,35,44,53,62,71,80X=089,179,269,359,449,539,629,719,8092、X是11的倍数故X=539不满足X-6是7
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