) V! W7 m, A1 M: \公仔箱論壇答案30號公佈公仔箱論壇" {* E' D; ?3 e
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[ 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. " O* e% f, d$ e, @; w) 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。Let x = Male, y = Female, z = Child0 ?) ~; Y/ C5 o1 D/ H5 p8 K0 u
6x + 3y + z/2 = 100 Formula 1 ' ^, C9 B' l( `; Y7 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。x + y + z = 100 Formula 28 R6 r5 }" L" b) X5 H$ q# N
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 4 Q$ V a C8 I( y* {公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 5 d* a* _! i$ u7 d5.39.217.76Formula 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。* U: f& V7 L& R) O; t
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. . K2 U, L* C c0 n# W: {1 f! j9 O+ ^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1 m- n) b0 M9 J# }1 i( d
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 5 L% h" ~% V. h: Q) k Ntvb now,tvbnow,bttvb11x + 5y = 100 Formula 5
; R) ?! V0 j3 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。11X must be 0 or multiple of 5tvb now,tvbnow,bttvb) n6 _/ t& [" h; ?' c
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 8 U' c! T* o, H. F" {) V5.39.217.765 male 公仔箱論壇$ T" C, w5 x9 C1 K
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
