據說百分之九十的人都會答錯的一道數學題目

兩塊吧...
-8+9-10+11=2呀...
所以應該是兩塊吧...

雖然我是猜兩塊....
但是我覺得猜一塊的人說的也很有道理耶....
我都被搞混了:what:

這題目感覺很像是"住旅館~然後被服務生歐走錢"的那種題目~~
(應該很多人算過吧...少一元的問題....)

too easy...
1st time he sold the chicken:
cost=8 , price =9
so, profit should be 9-8=1

2nd he sold the chicken,
cost=10 , price=11
so the profit should be 11-10=1

so, the total profit is 1+1= 2

[ Last edited by cygnus_0216 on 2005-7-23 at 02:21 PM ]

只賺一元呀
賣兩次雞賺2元
可是把雞買回來又虧一元
所以答案應該是賺一元

不是兩塊嗎??                                 
還有其它答案嗎

-8+9-10+11=2

當然是2囉   說3的人  可能忘記 其中有1圓被第一個買主賺走了喔

這題有沒有答案啊??
我也是算出"兩圓"耶!
因為:
一開始假設那個人賺與賠設定為0
買進一隻雞:
0 - 8 = -8
賣出一隻雞:
-8 + 9 = 1
在買進一隻雞:
1 - 10 = -9
再賣出那隻雞:
-9 + 11 =2

所以最後賺了: 2

覺得是賺了2元..@@

不過答錯的機率這麼高..到底是不是正確答案阿=  =

想知道答案的說  :sleep:

我猜..........賺一塊吧!
不知道對還錯!
來看看嘍~
多謝分享喔~

1.
you buy the chicken with 8 bucks (you haven't earned or lost anymoney), sell it for 9 (earned 1  buck), buy it back for 10 (loses the buck you earned, and gave that person a buck), and finally sells it for 11 (earns 1 back).
therefore the answer is 0.

2.
you buy the chicken with 8 bucks (you haven't earned or lost anymoney), sell it for 9 (earned 1  buck), buy it back for 10 (loses the buck you earned), and finally sells it for 11 (earns 1).
therefore the answer is 1.

3. (correct answer)
the finaly buyer pays 11 buks for the chicken, and the 11 buks goes to:
the original chicken owner--8
the first buyer----------------10-9
you-----------------------------2
therefore the answer is 2.

the right answer is 2.
beacuse let's say you originally had 8 buks.
you buy the chicken, now you have 0 buks and a chicken.
then you sell it for 9 buks, and you have 9 buks.
but you buy the chicken back with 10 buks, now you have -1 buk.
finally you sell the chicken for 11 buks, therefore you have 10 buks.