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Re: [其他] 南二中104教甄數學題Q1

[ Math ]74 留言, 推噓總分: +21

作者: doa2 - 發表於 2015/04/27 13:06(9年前)

62^F推ggg2000: A講出B也不知道，代表個位數絕對在C給的參考答案中05/07 13:19

63^F→ggg2000: 出現兩次以上，如果A手上是3/5，那A就不能說B也不05/07 13:19

64^F→ggg2000: 知道，因為有38/57這兩組個位數只出現一次的答案，05/07 13:19

65^F→ggg2000: 所以A手上不是3/5。。。。那B從A講的話中推出A手上05/07 13:19

66^F→ggg2000: 是4/6，他就知道答案了，代表B手上絕對不是2，不然05/07 13:19

67^F→ggg2000: 還有42/62可選。。。。此時A知道B手上不是2，那剩三05/07 13:19

68^F→ggg2000: 個選擇，45/46/61，但A原本就知道十位數是6，所以只05/07 13:19

69^F→ggg2000: 要確認B手上不是2，那答案很明顯就是6105/07 13:19

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