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可以填0、6. 解析:要使這個數有因數2,則它是2的倍數,所以個位上的數可以是0、2、4、6、8; 要使這個數有因數3則它是3倍數,所以個位上的數加十比特上的1、再加上百位上的5的和必須能被3整除,則可以加的數是0、3、6、9, 綜上所述可得()內能填的數位只能是0、6.
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