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一個數C乘上一個不同的數B個位還是C,說明(B,C)只可能是:B=1,C=2;B=6,C=2B=1,C=4;B=6,C=4B=1,C=6;B=1,C=8;B=6,C=8B=1,3,7,9,C=5又BB*C的後兩位是BC囙此只能是:B=6,C=4;BB*C=66*4=264;說明A*C個比特是4;但A和B不同.無…
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