[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5.39.217.76% ~" ]4 L$ f1 W7 x. \# F4 h
規則公仔箱論壇) g7 u' B/ {0 w$ L$ g
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/ V: N {2 g$ T0 n% X ?) O0 C4 t5 |
1個男人搬6塊磚5.39.217.76" O( }7 J5 D3 K
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。, R7 g6 p5 N" A2 t; `# n, U
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。+ h/ q: ^8 x% V, Q* g, z

答案30號公佈
公仔箱論壇( J* B$ i. `& }5 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.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。. @+ y, F0 `* A! r& E" X- z
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
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 55 H ~( K, Q, y Y
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇' t/ Z% s. @: ~& c* h
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。. R4 c! m+ r# [7 U4 \+ O( E8 h% b" {1 `
Eventually, the answer is 20 female and 80 children and no male.

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alan1234