That is a very simple mathematics question.公仔箱論壇# C5 J7 F, ^/ h4 h8 \' B
Let x = Male, y = Female, z = Child5.39.217.761 _8 N$ P7 v2 [2 {" Z& ?) {
6x + 3y + z/2 = 100 Formula 1 6 n6 L" B% ]( Y% f ~$ X公仔箱論壇x + y + z = 100 Formula 2 . n3 x5 p; l z eTVBNOW 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 34 i3 d f" R& w' l0 _1 Q
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 / G" Z" v3 x, }/ r. ]) fFormula 4 can change into 11x + 5y = 100 Formula 5 ; y, K! Q% [5 V, YIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.) |3 ^: W5 F6 w$ U7 a9 e
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. 2 Z5 T7 x6 r8 c" M- y; x3 T) z5.39.217.76Eventually, 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
man,female,children % K( V$ `4 ]9 a1 ?+ ^9 D X0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 : E" Z% L: g @1 g( L' q$ w' r, {公仔箱論壇11x + 5y = 100 Formula 5
. Z. v, x6 C" l: ^% }8 s7 RTVBNOW 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。11X must be 0 or multiple of 5tvb now,tvbnow,bttvb7 C% N) G8 i3 r( i. F0 s$ E
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children5.39.217.76$ y0 W9 i7 q/ S8 o
5 male 7 y6 d) ^: N6 m' P. _) ^0 tTVBNOW 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 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
