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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5.39.217.77/ U5 M9 W) ]" J! w7 Z
規則
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
1個男人搬6塊磚
1女人搬3塊磚
2個細路仔搬1塊磚
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問搬100塊磚
要幾多男人、女人同細路仔/ y# f! o2 H' w' M
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。: L+ |- o# m% ~& Z- Q
答案30號公佈- H+ r) N5 c1 L: u3 {* q0 B( N

[ 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.tvb now,tvbnow,bttvb! f$ k, S, C x# {. b$ T' d
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2公仔箱論壇0 \1 B: y. A" U$ V% V* [
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇7 _9 `" N6 |! a0 @
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.tvb now,tvbnow,bttvb" `, V/ D8 P8 @0 ~0 {8 g# S& w
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
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
( ~) p7 c. ?+ a$ n; u6 _8 z5 N* p11x + 5y = 100 Formula 5

11X must be 0 or multiple of 5公仔箱論壇 g& k+ F- o# s4 O9 w8 e
that meanz x must be 0 or 5

作者: manstein 時間: 2007-10-15 08:28 PM

86 childrentvb now,tvbnow,bttvb) m- R2 O* z' Q0 ]1 o5 M* R: m! O
5 male 5.39.217.77& v; p- s0 F8 N( o7 Z: y
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5.39.217.771 P) z! y$ S' q6 m, N
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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