[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...tvb now,tvbnow,bttvb( D) G% m# J* A0 s+ A
100人當中有男人、女人同細路仔
1個男人搬6塊磚5.39.217.779 |: }1 H( p% k" E& \4 w
1女人搬3塊磚tvb now,tvbnow,bttvb( N) u+ v7 R- Y a& h6 o
2個細路仔搬1塊磚
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問搬100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。% D1 k/ x7 F+ j7 g! f9 Y; K
要幾多男人、女人同細路仔7 M+ y2 X+ v( L9 t- @

答案30號公佈" H8 T' {% x3 t: @

[ 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 = Child" D" T2 G% s* ?5 F& E# H n
6x + 3y + z/2 = 100 Formula 15.39.217.772 w% E* `2 m4 K; S# s1 X% l& ~
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇8 B! h5 l9 y* ~; Z& s& |
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 5tvb now,tvbnow,bttvb) U9 J* G2 ^( n: u6 Y
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
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