[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tvb now,tvbnow,bttvb' K: n/ ~, Y" T5 z8 L; Z1 q" k, ?% I
只何用100人搬100塊磚,不能多也不能小...5.39.217.76 q, n; V) a$ q3 H; f" ~
100人當中有男人、女人同細路仔$ ~' K/ G4 X& w
1個男人搬6塊磚
1女人搬3塊磚
2個細路仔搬1塊磚
**************************************************************
問搬100塊磚9 j& ^+ Y" @3 c. k
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。2 @4 U/ y! ~5 ~2 v
tvb now,tvbnow,bttvb* g" S5 [& ]7 p" Q: ~$ Q4 E5 _2 t
答案30號公佈5.39.217.760 Y3 B3 P4 {1 z

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

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twinsdragon

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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9 k; ?% C9 h0 @6 F0 ]. ^: [
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3, F: o- Y$ F/ r3 H7 Z
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇( l- E$ s& G: ]& a) G7 I; f% L
Formula 4 can change into 11x + 5y = 100 Formula 5* J# y# f0 e, g% k3 Y) `: m e
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。$ ]) g# K7 D- A; [ k% h; _2 T
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.

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alan1234