一道有趣的推理 - V2EX
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一道有趣的推理

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  •   013231 Dec 9, 2012 6000 views
    This topic created in 4907 days ago, the information mentioned may be changed or developed.
    在看到的: http://www.douban.com/group/topic/31266336/

    先一笑:
    数学系一共3个班。今天他对我说,你是3班的么?我说,原来你是2班的啊!他说,原来你是1班啊!

    笑中的想必大家都明白, 不下面升版的就要麻的多了:
    一天,鬼谷子随意从2-99中选取了两个数。他把这两个数的和告诉了庞涓, 把这两个数的乘积告诉了孙膑。但孙膑和庞涓彼此不知到对方得到的数。第二天,庞涓很有自信的对孙膑说:虽然我不知到这两个数是什麽,但我知道你一定也不知道。随后,孙膑说:那我知道了。庞涓说:那我也知道了。

    很有趣的一道. 用算好(可以直接大量, 不用考巧妙的算法), 徒手推理相困.
    5 replies    2016-02-04 10:39:10 +08:00
    xuc
        1
    xuc  
       Jan 18, 2013 via Android
    鬼谷子问徒 小时候类似科普的书里面看过了
    xuc
        2
    xuc  
       Jan 18, 2013 via Android
    跟哥德巴赫猜想有关,徒手推理当然困难……
    nazor
        3
    nazor  
       Aug 19, 2013 via Android
    这不是什么和华罗庚有关的一个什戴帽子的问类似么?
    myid
        4
    myid  
       Feb 4, 2016 via iPhone
    答案是 3 和 4
    myid
        5
    myid  
       Feb 4, 2016 via iPhone
    哦 修正 答案应该是 2 和 6
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