That is a very simple mathematics question. * J* c" V! Q! `! k0 A! D ~公仔箱論壇Let x = Male, y = Female, z = Child / C# T7 N% a$ ~1 B7 }3 _% x, r6x + 3y + z/2 = 100 Formula 1( w. I- J+ n# J4 A+ K
x + y + z = 100 Formula 2 ( p" a7 @% E& _- `公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb6 t/ D y" G8 e
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 9 [. u3 p8 l" @0 G+ Qtvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5 ; d0 C- M$ |/ n8 nIn 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。) k( s* Y, q# [3 O, p% R5 y
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. 9 s" D) A& w4 L3 l/ F9 A公仔箱論壇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
man,female,children5.39.217.76: V+ ~9 ~. a0 n$ S
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
公仔箱論壇# P0 o( R, r2 N* w, r; q! `5 r5 @. j2 [) Y
11X must be 0 or multiple of 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。# ^" z4 s7 E8 e. G
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM