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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5.39.217.765 W  b6 P. u. T+ z/ e4 J
規則公仔箱論壇* T. `/ X; j  {- e, }& j" j
只何用100人搬100塊磚,不能多也不能小...5.39.217.76. U% i, E% d# y) ?
100人當中有男人、女人同細路仔; |  j" k" F9 W7 |3 B, I  h) W
1個男人搬6塊磚
1女人搬3塊磚5.39.217.76! v1 [& P) \9 g0 X
2個細路仔搬1塊磚
**************************************************************5.39.217.76- D( T5 d, b( Z3 @
問搬100塊磚
要幾多男人、女人同細路仔
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。7 D" a  G* x0 r, ^$ A7 k2 L
答案30號公佈
公仔箱論壇: x$ L/ K/ q1 O9 p% }
[ 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.% Q& \. S$ W9 ^ s. Q8 r/ T
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 15.39.217.762 v! s4 g5 |2 l
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇" Y1 ?" @3 S& h5 T
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 5tvb now,tvbnow,bttvb7 N: F1 }' Z( P- `3 Y8 }+ E" V
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.) s1 d3 y5 Q3 B) [
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# p: d* z( Q( K( H* X9 x
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- r" r/ N; A& Y0 o, N: D
11x + 5y = 100 Formula 5

11X must be 0 or multiple of 5
that meanz x must be 0 or 5

作者: manstein 時間: 2007-10-15 08:28 PM

86 children
5 male 公仔箱論壇9 f) v$ x6 K8 _4 ]5 e" k
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5.39.217.76. G5 T; ]. `, W r
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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