That is a very simple mathematics question. ; I8 c9 P2 [% @ cLet x = Male, y = Female, z = Child 2 n, B6 r% V5 y, L" L- M. FTVBNOW 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。6x + 3y + z/2 = 100 Formula 1 & Z$ U3 }7 W; P/ g& q4 a/ ~* ax + y + z = 100 Formula 2TVBNOW 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。2 Q+ u+ Y/ {4 Y. u0 H3 T9 C
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 - N: e, z& S) a! }$ ^) }" ?' N6 RSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4# i" s6 F- X- _( W4 T+ y; U# D
Formula 4 can change into 11x + 5y = 100 Formula 59 W9 ~/ Z5 s2 V9 w
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ' x! b6 o& ]: V" x1 z9 }5 {公仔箱論壇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. 5 x* B. { R) ~/ K5.39.217.76Eventually, 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
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 , S' I$ M* s9 Z7 L8 b% d' l公仔箱論壇11x + 5y = 100 Formula 5
公仔箱論壇7 ^" ^+ \$ ]# B+ s+ J1 b/ G
11X must be 0 or multiple of 55.39.217.76* L T1 h7 l! R) g, ]" R" h
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 1 G/ s1 z3 v& X4 b. V1 MTVBNOW 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 5.39.217.76" q2 ?/ J5 n$ O! E
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
