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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* g: G; U$ Z" d: }+ ~; \$ N! N
只何用100人搬100塊磚,不能多也不能小...2 p6 A1 n2 ^$ g* B9 R  e6 |7 i6 a  j
100人當中有男人、女人同細路仔3 I5 X1 u! A5 R9 m- I3 E# m
1個男人搬6塊磚
1女人搬3塊磚
2個細路仔搬1塊磚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。+ [+ J6 P! V: C* u' R3 m* G) A
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問搬100塊磚# T/ @$ h5 F: M3 ^
要幾多男人、女人同細路仔
( ?2 i& S% X! D- F& }3 m) s' u8 i. Y
答案30號公佈% u' ~" i3 c  F

[ 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.5.39.217.765 e+ R$ @+ `# `$ U# H
Let x = Male, y = Female, z = Child# n& K% |. G% g0 }
6x + 3y + z/2 = 100 Formula 1) q4 O/ ~4 ]0 ?0 }: G; E2 C, {
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb, }4 I! u+ e# P' N/ L
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇: K7 r0 n0 C8 V, u+ X# K- f H
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, ~3 w$ v0 M+ C
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.. V; h" m2 s$ @9 o o$ i
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
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。; ~: d) ?7 ~/ A. Z2 m W' f! z9 x
11x + 5y = 100 Formula 5

11X must be 0 or multiple of 52 V; d; J! G# X: U
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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