That is a very simple mathematics question.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。9 F# ?: B3 Z$ o
Let x = Male, y = Female, z = Child " o5 ]" l0 l9 @; m8 h/ j6x + 3y + z/2 = 100 Formula 1 1 j) ?' w, z' M: T" c* R# lTVBNOW 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 + y + z = 100 Formula 2 ; M1 a" @* K. s8 Q7 o公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 + z! C0 w# g% L5.39.217.76Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。" Z5 ]' G% |7 }* v. V1 w( n
Formula 4 can change into 11x + 5y = 100 Formula 5 / u* ]5 G7 z. G6 G: Z+ C! p# \ rIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. * T$ A7 A+ f$ ZAnd 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. . c& ^' b* e# k Y3 @2 Ytvb now,tvbnow,bttvbEventually, 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 3 `3 T! c4 }: ~4 c) f3 b3 W. v11x + 5y = 100 Formula 5
$ t: T$ i$ h s1 U6 g8 hTVBNOW 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 5 3 ?' P. D& _2 M7 Wtvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
