+ o2 L% n* ]3 z答案30號公佈+ m, R9 G2 j/ X' B6 U
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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. 9 ~( i! L9 W' f% Q, |公仔箱論壇Let x = Male, y = Female, z = ChildTVBNOW 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。) O! M+ V& o& a! n. A" ^2 v- E
6x + 3y + z/2 = 100 Formula 1 ; E. k X, ^* n# i( ^6 q% A. A1 ztvb now,tvbnow,bttvbx + y + z = 100 Formula 2 1 V, U3 g; ?4 \2 A5 V- R9 d公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇8 p5 m* |5 w& k8 q) j, k
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4( t9 R) ?9 \: _$ Y$ o6 {
Formula 4 can change into 11x + 5y = 100 Formula 5 1 q' \) C+ Y7 D8 z+ C2 R* stvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.* N5 _- \# x7 R% ]# f
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.tvb now,tvbnow,bttvb( a3 O! T0 v+ o6 P( S* |
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
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0,20,80 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. {1 [; R1 x& ?" |8 h) a
11x + 5y = 100 Formula 5
! H: N" g# q* ]$ o" W1 B' vtvb now,tvbnow,bttvb11X must be 0 or multiple of 5 7 w, H f+ D6 J/ 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。that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children o" \" |$ V9 x9 l- d+ J
5 male 3 q. l; I5 O' u4 X6 S; y9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
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