开始写“部落搁”时忘了要先跟大家打个招呼先，欢迎大哥大姐赏面来到小弟这儿参观参观。前几天鸟言鸟语出了一个让我想尽脑汁的IQ题，幸好还会答。好吧！！偶就以另一题IQ来做开场礼吧!!!
鬼谷子在2--100这99个数字中选了2个数字，然后把它们之和告诉了庞涓，把积告诉了孙膑。
庞涓说：“虽然我不知道这两个数是多少但是我肯定你也不知道。”
孙膑道：“本来我不知道的，但是现在我知道这两个数是多少了。”
庞涓想了一会，说道：“现在我也知道这两个数是多少了。”
这两个数到底是什么？
p/s: 谁会回答的请教一下小弟哦。
今天整天就在把自己的“部落搁”做美一些，但不知为什么preview时好好美美的，真正时就问题一箩箩。有哪位高手可以请教请教吗？？失败 。。。lol
2 comments:
Let’s x+y=A and x*y=B
And we know 1 < x,y < 101,x not equals to y. Then we got a set of As and Bs, where Phang only noes what exactly A is and Sun only noes what exactly B is.
Before starts, Phang and Sun make a big table that include both set As and set Bs.
Firstly, Phang duno what are the both cards.
Then we can sure that A is not 5,6,198,199; as they only appears once in set of As.
Second, Phang is sure that Sun duno what are the both cards too.
Phang means that A is not a number which is the sum of 2 prime numbers. Else, Sun will just know what the both numbers are as when 2 prime numbers are multiplied, the answer will be unique and will not repeat in set Bs. Therefore, Phang eliminates the possible numbers that are the sum of 2 prime numbers.
After that, Sun compares the numbers in set As that haven’t eliminated with those numbers in set Bs. Sun noe the answer in a sudden and shout out : I CONFIRM!....This shows that the B in Sun’s hand is only appears once in set Bs after Sun eliminate those pair of x and y that Phang eliminated.
After Phang heard Sun said: I CONFIRM, Phang then can also confirm what are x and y exactly are (by referring to set Bs).
Therefore, the answer for both numbers is 4 and 13.
p/s: it’s not easy to find the answer, I spent the whole afternoon and nite to do the elimination and comparison.
After all, I was chatting wif my fren and I was thinking to test her wif this IQ test. So she roughly read the question and asked me to give her 5mins……
After 5mins, the answer she gave me is : x+y=17 and x*y=52. Damn………..
So, my question: Do you noe how did my fren found the answer?
Post a Comment