[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5.39.217.77:88985 ?+ P$ Z$ p# ]+ ~- `4 ^
規則5 O! t8 O7 K: R/ T' g! n
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb1 m) V9 c U" @# B u( c: S
100人當中有男人、女人同細路仔公仔箱論壇+ r) d1 u6 j" S: l# J9 @
1個男人搬6塊磚tvb now,tvbnow,bttvb. I1 h5 K; a+ j# H0 H$ \. \7 a
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。/ D& [8 a4 c6 }; a2 o
2個細路仔搬1塊磚% K+ @0 P3 \& Y; u- B: ~3 b7 Q+ k& _
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問搬100塊磚 i% k& x* g* S# D
要幾多男人、女人同細路仔
5.39.217.77:88983 c* B' r" ^: f* ~4 k" ?
答案30號公佈公仔箱論壇8 v' ~6 o8 ]6 e% r

[ 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.tvb now,tvbnow,bttvb% ^+ R) r; Q' x3 ?) M
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 15.39.217.77:88986 Y7 C4 D9 ]& ~1 |: D) y# F7 R
x + y + z = 100 Formula 2公仔箱論壇7 C; V" w8 c% J5 [' t* J& A1 }$ h2 z
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.77:8898; j1 f, E) [6 ?5 S1 [! T
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb2 v) a9 E3 v( T* p
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.公仔箱論壇9 b& B! i7 i- X! q8 ~6 L
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。; o$ g6 ~, d! K) D" c
Eventually, the answer is 20 female and 80 children and no male.

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alan1234