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。/ z1 S* ~+ q- O: _6 i0 C7 B
Let x = Male, y = Female, z = Child 6 E6 l3 E* M2 R0 G# t. W* u# {6x + 3y + z/2 = 100 Formula 1 7 U9 [6 p% }0 Q3 [6 _9 Xtvb now,tvbnow,bttvbx + y + z = 100 Formula 2公仔箱論壇6 P& Y0 H! B( C* s
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3TVBNOW 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, ]! Z. ]4 M- {- R' K
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb+ u8 K8 ~& j7 x) x! e7 F! F& r
Formula 4 can change into 11x + 5y = 100 Formula 54 {) z$ c: m/ f5 J
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。! f6 }& }9 t8 r5 j1 X4 b
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./ q& ]# E3 c3 g1 j
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 tvb now,tvbnow,bttvb2 ^; o# h3 I( Z. R1 E
11x + 5y = 100 Formula 5
5.39.217.76+ p0 d7 _* i) Q9 N p
11X must be 0 or multiple of 55.39.217.768 l/ y2 h. ]5 L' b5 S0 E5 f/ ~7 _
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children ) ]: O' }) q+ Xtvb now,tvbnow,bttvb5 male 公仔箱論壇' a9 F: \1 W: P; L5 @. h7 ]! E
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM