That is a very simple mathematics question. 4 l4 U- U/ s; N4 n( Y5 ^Let x = Male, y = Female, z = Child6 s+ k% X# P- L7 c; [' k) y( f4 e
6x + 3y + z/2 = 100 Formula 1 ( o& j. C1 V$ `2 q公仔箱論壇x + y + z = 100 Formula 2 - A8 Z/ I# K% o" n3 O* H8 v5 u, 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。Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 & C- Z/ Y/ m6 f7 |% R公仔箱論壇Sub 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。- }5 t/ I4 D& u6 T
Formula 4 can change into 11x + 5y = 100 Formula 5 , D5 A! t; `$ a, v ~公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. # c- r# g0 s& f' _/ c5 Dtvb now,tvbnow,bttvbAnd 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. " Z# _5 A/ _4 ~3 ZTVBNOW 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。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 + j3 o Y; h+ _! o& q, }' `; u公仔箱論壇11x + 5y = 100 Formula 5
/ I D$ Q7 e& `; 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。11X must be 0 or multiple of 5公仔箱論壇" n o. t6 o9 U& w( X
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 0 F7 I! o+ z. K" B6 N* j# Z5.39.217.765 male 5 y: H4 s j' [ e4 A& A9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
