[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塊磚公仔箱論壇9 t' C- X9 I' e! h
規則
只何用100人搬100塊磚,不能多也不能小...! _1 z/ F' x3 e# P+ _ q$ r
100人當中有男人、女人同細路仔
1個男人搬6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。# ^/ M; f- w9 k, ?' x
1女人搬3塊磚
2個細路仔搬1塊磚tvb now,tvbnow,bttvb( V# }: f. q" n, C
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問搬100塊磚
要幾多男人、女人同細路仔
+ ^7 o( g) M; x) f
答案30號公佈1 _( _6 \ q, O3 s, u3 m9 S
6 `$ r/ @! A( e4 j' |6 X
[ 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.6 {- Z1 v1 ~% k; X
Let x = Male, y = Female, z = Child5.39.217.77 q+ Q4 A) E/ v1 j6 w5 f
6x + 3y + z/2 = 100 Formula 1TVBNOW 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。6 U$ G ]# n, @5 s% y: w# _
x + y + z = 100 Formula 2TVBNOW 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。; L/ g% J" @1 W/ q
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.771 A+ z2 s/ t! x5 @/ |
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 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。4 o# e& u/ n! Y8 {- V
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。0 @1 h( o3 J: L4 [8 g1 m7 X% s
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 = 80.3 c; d& |# ^8 M3 f5 K5 c
Eventually, the answer is 20 female and 80 children and no male.

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alan1234