[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。 s& x# N$ S. h
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只何用100人搬100塊磚,不能多也不能小...+ G F& P( |. X3 [+ m Y
100人當中有男人、女人同細路仔
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
tvb now,tvbnow,bttvb+ R1 d8 {' j( Y% O5 @
答案30號公佈/ @! F4 m4 ^7 ]! i' _# Z6 y

[ 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.5.39.217.77. g2 u: Q' |! `+ _5 q
Let x = Male, y = Female, z = ChildTVBNOW 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。% b# s% Y) y1 x$ A1 |
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2" k" \& V5 q& C- m" F
Simplify Formula 2 into z, we get z = 100 - x - y Formula 36 `* O. b( }9 \2 F
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。- D) E/ S$ J, S7 o. U; L
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.! c. _$ ]( _3 V+ H5 n" I4 h2 |
Eventually, the answer is 20 female and 80 children and no male.

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alan1234