HELP!!!推理題.....答到 + 20

2008-03-27 3:15 am
係一條村莊..全部村民係唔會溝通既.但係每日朝早都會有個早會..係早會'佢地係可以見到哂村民,,但係唔會講野/...有一日就叫day1..神報夢比所有村民知..如果自己頭上面有個紅印既話..你第2日就會死..''

問題就係::: 1.到左day7.總共死左幾多個??
2. 果7個人點會知道自己頭上面有個紅印??
3. 但係如果唔知係有7個人死'' 咁個答案點係咩呢??
要解釋埋呀..!!!

提示就係::
1 .紅印多於一個 2.用鏡照唔到既 3.紅印既數目係唔會變...
4. 答案係 死左7個人..但係我要解釋''
5. 7個人係同一時間死''

回答 (3)

2008-03-27 3:47 am
✔ 最佳答案
呢條超級難題,我嘗試解:

條題目應該是「知道自己頭上面有個紅印」

設村民人數是n,有紅印人數為x

如果你見到全部人冇紅印,即是你有紅印,then you die
so, if day 2 no people die, it means all people see more than 1 紅印 and the people know it.
so if you see one person have 紅印, but day 1 no people die, it means that you have 紅印 and you knows it,you die.
so if you find 2 people have 紅印, but day 2 nobody die, you know you have 紅印 and you die.

如此類推,有紅印的村民見到有6個紅印而第六日冇人死,就知道自己有紅印了,就走去死了。




2008-03-26 19:52:14 補充:
是見到第七日冇人死。

不過,照咁解,你應該先講神俾咗幾多個紅印。
同埋知道紅印會立即死。
2008-03-27 3:55 am
我講得唔清楚姐..但係有人答左..
2008-03-27 3:30 am
你俾d野一d都唔清晰 叫人點答呀
神可以俾晒所有村民都有紅印,亦都可以唔俾ga姐
你又冇講神一定會俾個印
咁樣你講晒都得ga啦~知唔知咩叫推理!

一係你玩野,一係個問題根本係gap黎,再唔係就係你講得唔清楚...咪又係玩野


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