[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$ K* Q* A+ {! P! a" _
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只何用100人搬100塊磚,不能多也不能小...
100人當中有男人、女人同細路仔5.39.217.760 r) @9 @: Z6 q1 S- O
1個男人搬6塊磚
1女人搬3塊磚
2個細路仔搬1塊磚
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問搬100塊磚
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。8 P/ X8 M6 ~/ v/ ?+ j
答案30號公佈
tvb now,tvbnow,bttvb. p8 |# W( L# d5 L. @
[ 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
6x + 3y + z/2 = 100 Formula 10 v( J" K& y' _: ~9 X
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4" r# w0 G% d- z! x
Formula 4 can change into 11x + 5y = 100 Formula 5) [+ G6 V$ ~% E5 J7 l2 b7 w
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb9 v# a9 y: j3 R2 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.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。9 a( W, Z3 y, D( s8 ]
Eventually, the answer is 20 female and 80 children and no male.

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alan1234