[IQ題] [數學題]100人搬100塊磚

，描述：問要幾多男人、女人同細路仔

100人搬100塊磚
規則
只何用100人搬100塊磚,不能多也不能小... G7 r( C3 w% B" t D2 f
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。" w/ N. ]7 ?6 e: o; r
1個男人搬6塊磚
1女人搬3塊磚
2個細路仔搬1塊磚8 b& s; D. o& G
**************************************************************tvb now,tvbnow,bttvb/ l: o; ]' b, i+ u$ U. m
問搬100塊磚
要幾多男人、女人同細路仔

答案30號公佈+ h) G3 S& ^) ^# I: ]) I( |- A/ w& L

[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]

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twinsdragon

初級武將

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發表於 2007-10-13 05:40 PM | 只看該作者

That is a very simple mathematics question.公仔箱論壇& r  c3 c+ b! l$ V2 v3 L& u
Let x = Male, y = Female, z = Child公仔箱論壇, z+ J# E0 K' I9 N
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb, e4 W: n. l9 U& p5 H
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3os.tvboxnow.com0 X; z; Y) g+ L7 E8 W0 A# _
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.os.tvboxnow.com% y, i: F9 V8 f  E9 Z
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.) y' m/ h  [* w, t( H: b
Eventually, the answer is 20 female and 80 children and no male.

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alan1234

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發表於 2007-10-14 12:19 AM | 只看該作者

two answers

man,female,children
0,20,80 or 5,9,86

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RyanC

原始人

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發表於 2007-10-14 10:46 PM | 只看該作者

原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表公仔箱論壇5 ]) Y# }6 N! ^- d V# T
11x + 5y = 100 Formula 5

tvb now,tvbnow,bttvb: A1 T( y# A; Z }( k! U. d
11X must be 0 or multiple of 5tvb now,tvbnow,bttvb: R4 y2 ~$ [3 f& E+ D6 N( Q2 Z
that meanz x must be 0 or 5

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manstein