[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$ K9 |. w! d2 J( q9 m+ W
規則
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
1個男人搬6塊磚5.39.217.772 k% {: T) _# k1 g7 I! z
1女人搬3塊磚
2個細路仔搬1塊磚, J- `6 _0 o% y( n7 J; o
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問搬100塊磚
要幾多男人、女人同細路仔" p: j" L# l [# N0 M. u8 h
公仔箱論壇( I+ b- {5 s4 c$ C8 N; V% E
答案30號公佈

[ 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 15.39.217.770 j7 }# e* F. L9 D: S s m6 v
x + y + z = 100 Formula 25.39.217.771 e E! b t: L+ `+ ^% x
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! i4 Q3 b2 M! ~
Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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 p9 c* ^8 a& a, U5 _4 @! Y
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
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