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答案是:89 分析: 根據題意可以推斷這是一個兩位數,那麼個位和十比特上的數位就從1~9之間尋找. 但是題目中包含條件是兩個相鄰的合數,那麼只有8和9符合題意.所以初步推斷有89和98兩個,但是第一句話說這個兩位數是一個質數,那麼98不符合,所以只剩下89.即為所求
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