[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4 H% y; ?/ ?2 v) }( v- _
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只何用100人搬100塊磚,不能多也不能小...公仔箱論壇7 E+ V% q( C1 X# D$ {5 j5 F8 d
100人當中有男人、女人同細路仔公仔箱論壇6 \$ m/ g! r8 i( J. O# W7 t
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。5 w$ R8 ?4 f! N- D$ s1 G7 F
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問搬100塊磚5.39.217.77:8898) h0 @' B" H. G0 T# g7 s, I1 C& w
要幾多男人、女人同細路仔公仔箱論壇4 S T2 z1 v4 K
+ T# e$ U9 W' [5 C: Z7 J. Y+ K; |
答案30號公佈

[ 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.
Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb6 ^% U4 u9 B5 |0 }+ n& c0 H
6x + 3y + z/2 = 100 Formula 1 R6 H9 Q$ b& J( x$ a
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb! X* L+ U& S9 H% }
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3! l3 Z# |; z( ^) R( c* P* w0 \
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.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。% m- H4 P' |7 ]9 W6 r" g% R
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