100人搬100塊磚1 e* ?$ {7 r% Q- o6 M1 ?2 J' E& _
規則6 ?, k7 C' N( _) V7 [
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb* @. L- f9 }) j+ g( ?5 g; f
100人當中有男人、女人同細路仔6 Y" W9 Z8 }4 E: @! a5 _! C! D8 ~; ^2 ^
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。: E+ ?, l2 t+ m4 w! H/ L8 r
1女人搬3塊磚 $ D1 D& J0 a, Y# P2個細路仔搬1塊磚tvb now,tvbnow,bttvb& d6 n( x. k1 a t, {$ f8 C/ f1 t
************************************************************** ' F( O6 u Q z( Q, ~問搬100塊磚公仔箱論壇. Y+ g) I; C" m) H; p7 c& r# b- z) z
要幾多男人、女人同細路仔* _9 _1 s4 s( O/ w6 i3 E2 R
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答案30號公佈 4 l3 D x. x; }/ w5 o+ x9 gTVBNOW 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。' X' E S) d' A0 C2 n
[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]作者: twinsdragon 時間: 2007-10-13 05:40 PM
That is a very simple mathematics question. ( p! e Q2 H. F/ d P% RLet x = Male, y = Female, z = Child公仔箱論壇' X& h, }7 b: P" B3 V3 ~
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。5 X# Z7 ? O0 z
x + y + z = 100 Formula 2 9 A; y4 h& E) j7 C/ W! WTVBNOW 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。Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇# d/ g0 P: J$ k0 {& T4 M
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb5 d. K, Y& N2 T" n2 T
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。& x0 P9 q. A; ^
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇5 u4 c: I3 t( C1 g6 U% 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.公仔箱論壇% g. x" S6 u v, G7 j8 g. s
Eventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 8 A8 V: h4 C) c, N G+ `# s5.39.217.7611x + 5y = 100 Formula 5
tvb now,tvbnow,bttvb* s* r1 b7 _4 J
11X must be 0 or multiple of 5 ' S* |' L) j+ a" t$ D7 r) n3 A+ xtvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children # K6 k& ?& Y. s4 S- }& ]: C C2 sTVBNOW 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 male 公仔箱論壇' @& {5 o# B8 }( o' W
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
