That is a very simple mathematics question.公仔箱論壇) O* C0 z5 d8 Q. p
Let x = Male, y = Female, z = Child 4 J- D6 |% ?( V$ I1 r! [5 N公仔箱論壇6x + 3y + z/2 = 100 Formula 1 9 j( C# }. L3 o+ u; dx + y + z = 100 Formula 2 4 M* C$ f, G: @/ Rtvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 3 W9 Q# Q8 X5 d1 z4 MSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45.39.217.76! c4 G' i2 y* S# J
Formula 4 can change into 11x + 5y = 100 Formula 5 A! }$ j/ x- g* m, itvb now,tvbnow,bttvbIn 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。" p6 x: o2 z6 w2 ~% u
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.( M; O: z9 O7 L( @( k
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,children 2 a5 N6 e4 D8 L/ B; e3 J u. t0,20,80 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 : `- W6 Y' D o# z# p' d2 gtvb now,tvbnow,bttvb11x + 5y = 100 Formula 5
2 E' I | k' D4 u4 Z: |; o u11X must be 0 or multiple of 5 - @6 c% }+ q! |% i2 ^" r6 m( |0 V( Sthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children5.39.217.760 U2 f& w0 g# ^4 N
5 male " x& D) h- R5 U. z% P7 A5.39.217.769 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
