[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tvb now,tvbnow,bttvb5 m. N. i. u9 V7 W$ a$ }" }! @
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb1 @+ t ?; b5 K9 V3 `
100人當中有男人、女人同細路仔
1個男人搬6塊磚tvb now,tvbnow,bttvb! u: R: O9 A- a/ x
1女人搬3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。+ ~0 |& d# w/ F7 i" Z
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os.tvboxnow.com) U1 x1 c6 D; a# G
os.tvboxnow.com F W( I; a# F) y/ {3 h: ^
答案30號公佈( {# ^% [$ f8 K! _. K

[ 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.3 g; [! A/ N/ x; N1 z
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2os.tvboxnow.com N; g; G0 a6 m$ [- W
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3, _2 o# i4 h; F2 j, R
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公仔箱論壇& \+ W! P9 b8 |+ E
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.: r3 U; C$ ~4 L8 j$ B
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