[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; [* k- ?! G1 N( i1 {; T
規則tvb now,tvbnow,bttvb) k0 t" y. B) J
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www2.tvboxnow.com# o) _& l# R# p4 S/ F
1女人搬3塊磚tvb now,tvbnow,bttvb1 l" p: r, N; [& t1 h+ s
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
www2.tvboxnow.com$ m5 [; D" ^9 ]* r7 `5 c
答案30號公佈
www2.tvboxnow.com% W6 Y' {; S2 ?3 a$ [
[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]

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twinsdragon

初級武將

Rank: 7 Rank: 7 Rank: 7

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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 = Childtvb now,tvbnow,bttvb7 P$ k/ x) e3 e* Y
6x + 3y + z/2 = 100 Formula 1www2.tvboxnow.com6 M' Y9 @6 I7 }
x + y + z = 100 Formula 2
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 40 d/ K( B4 D2 X4 ?0 f0 N; s
Formula 4 can change into 11x + 5y = 100 Formula 50 m% v' g1 C9 N2 x! r, }: u3 F$ [) m
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

浪人

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發表於 2007-10-14 12:19 AM | 只看該作者

two answers

man,female,children
0,20,80 or 5,9,86

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RyanC

原始人

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發表於 2007-10-14 10:46 PM | 只看該作者

原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 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。5 n+ b/ A1 ~5 ^4 R$ \( A/ {% h7 h+ x( h
11x + 5y = 100 Formula 5