[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5.39.217.77:8898: t6 S; I* a2 q! m" J% l( w
規則
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb& G) t1 i1 w3 _- c1 `; q }+ x
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 U- B" ?! X, s
要幾多男人、女人同細路仔

答案30號公佈
5.39.217.77:8898$ x# U, O1 i: V3 D# 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.
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb, r' ?4 U' l- g$ z) h) Z3 K
x + y + z = 100 Formula 2公仔箱論壇1 E' [$ C4 p# S$ Z% m
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.77:8898! I& A& [8 H  [: Z
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4' m/ x  B* Z3 R7 u8 ^1 o: `! W
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。  b1 H" f' r5 s( k- P+ A4 p7 V) K
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