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標題: [IQ題] [數學題]100人搬100塊磚 [打印本頁]

作者: 1/5 時間: 2007-10-13 05:08 PM 標題: [數學題]100人搬100塊磚

100人搬100塊磚5.39.217.76* r% y0 H3 Y, r
規則
只何用100人搬100塊磚,不能多也不能小...TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。+ s# h$ J% j7 C* }
100人當中有男人、女人同細路仔
1個男人搬6塊磚
1女人搬3塊磚
2個細路仔搬1塊磚5.39.217.76 w5 W4 X! \4 y/ w! W" y
**************************************************************8 `: k, n) P. A$ c; L- i+ r6 r
問搬100塊磚- \- }( }# n& B' x
要幾多男人、女人同細路仔
& F* v. t4 _. U2 e7 `" a
答案30號公佈公仔箱論壇 O/ h' i7 k; {0 g) \

[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]

作者: twinsdragon 時間: 2007-10-13 05:40 PM

That is a very simple mathematics question.
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇, R9 |* p7 a# i4 ~% K/ ]! p1 z" O$ y
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。' Z, e7 G0 n9 [. k0 z* Q4 k; B
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
And between 0 and 9, only 0 can give me a single number of y. So, x has to be 0 and y have to be 20. Then put x and y back to formula 1, we get z = 80.
Eventually, the answer is 20 female and 80 children and no male.

作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers

man,female,children/ J" z; j9 A4 M! `
0,20,80 or 5,9,86

作者: RyanC 時間: 2007-10-14 10:46 PM

原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 5.39.217.76: b0 N- K& D! G0 h! f
11x + 5y = 100 Formula 5

11X must be 0 or multiple of 5TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。6 o3 d( c- G+ M2 J0 p8 X7 O' n
that meanz x must be 0 or 5

作者: manstein 時間: 2007-10-15 08:28 PM

86 children& l$ ]3 f1 G: u! K; \6 c& ^) W0 f
5 male
9 female

作者: dafunhei123 時間: 2007-10-15 10:39 PM

数学问题，线性代数，我算算再说

作者: dafunhei123 時間: 2007-10-15 10:47 PM

4楼5楼的算对了。看来这里的人也很无聊，线性代数，大学的教材

作者: ghjleo 時間: 2007-10-17 04:23 PM

5,9,84

作者: leou2830 時間: 2007-10-20 10:21 AM

想知道耶

作者: 1/5 時間: 2007-10-30 01:02 AM

答案: 男人女人細路仔7 X7 t8 _. O( s3 \5 s! a
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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