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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
規則公仔箱論壇+ j5 X( l) E3 t
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。  E, r' Y$ s# E5 Z8 j5 l
1個男人搬6塊磚; e  a+ s, a$ ]( U6 A% T  V; \
1女人搬3塊磚
2個細路仔搬1塊磚
**************************************************************公仔箱論壇4 ]3 Z8 r) }' p! `+ z" t  @, t. p
問搬100塊磚' l8 `; c0 i2 V4 Y, V" s
要幾多男人、女人同細路仔" Q; `& ?/ r7 ]; J% G
/ S0 y* o* M* y& h
答案30號公佈3 i! i2 j4 G6 }# `$ q& l% f
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[ 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 18 @* n1 u+ R" ` ^7 ~
x + y + z = 100 Formula 2
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 ?3 i6 Q7 w9 g* j9 [" u
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇* A# L* s& i; ]5 `9 v$ N- p6 {7 D
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb y5 e+ y" B5 U
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.公仔箱論壇8 B: r2 L) M5 ^$ |* _6 m
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 5.39.217.77' ?$ ?7 Z- m# R7 X$ N D' Y }
11x + 5y = 100 Formula 5

11X must be 0 or multiple of 5! N7 u' K- \( s% M
that meanz x must be 0 or 5

作者: manstein 時間: 2007-10-15 08:28 PM

86 children公仔箱論壇$ w; {. G& D5 m( F- h7 F: N
5 male M0 G. a2 q9 _# D1 d: h5 J3 D
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。2 F, M; t$ q5 c' l2 l/ V' y
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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