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abcabc=abc*1001=abc*11*7*13 要求abc是1,2,3,4,5,6,8,9,10的倍數即可,即[1,2,3,4,5,6,8.9,10]=8*9*5=360的倍數. 顯然有360 720兩種答案. 答:360360、720720
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