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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
規則5.39.217.76) c- _! J: I6 Y1 o
只何用100人搬100塊磚,不能多也不能小...
100人當中有男人、女人同細路仔tvb now,tvbnow,bttvb! n, t- l1 Z5 a% u3 w9 D; O8 Z
1個男人搬6塊磚8 M, O' l* |- J
1女人搬3塊磚5.39.217.764 v' X* K% x1 u# r! |2 }3 {: l8 P
2個細路仔搬1塊磚! w1 d' Y  s' }$ T
**************************************************************5.39.217.76* `( T% z0 ~( T& b# k+ l
問搬100塊磚
要幾多男人、女人同細路仔) F: w! i5 e; {8 O- H. S( A

答案30號公佈tvb now,tvbnow,bttvb+ W) X. ]/ d5 N. N  z  @
5.39.217.76* y5 N, `  Z5 y' [/ M) i1 Z, @
[ 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.$ {5 T# {' G6 n; q
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 25.39.217.760 a" V3 U. w& @$ a! x0 j8 {: T, J
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb( g2 f/ _ y1 @5 y2 O
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 5
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公仔箱論壇: Z7 [$ W, m$ _8 ]1 h+ I& n
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 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。3 _2 Z/ n. D1 J) U2 r, l
11x + 5y = 100 Formula 5

11X must be 0 or multiple of 5) ^. R" h7 q5 R* v: M* O
that meanz x must be 0 or 5

作者: manstein 時間: 2007-10-15 08:28 PM

86 children
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
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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