That is a very simple mathematics question. & \: b2 r. A8 q1 {6 S5.39.217.76Let x = Male, y = Female, z = Child 3 C. O. l# c4 |" S+ Etvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1 : _8 I0 z' |7 J$ X) {/ N0 S: E0 }! kTVBNOW 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 2tvb now,tvbnow,bttvb! }1 ^; w# G& y% w
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.763 g7 \ V' w9 s; @- y
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 , @, g* L% A0 E4 w) ?8 VTVBNOW 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。Formula 4 can change into 11x + 5y = 100 Formula 5) Z6 b- S% a( U6 n2 H' g
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb# a$ e/ z3 ^% Y* P' `/ B9 Z9 O# m
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.) L, I6 {# x, E4 X" ?) 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
man,female,children) i, e+ h7 p4 x f# R6 z$ H
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 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。/ t7 H9 w8 p1 Q I( I b
11x + 5y = 100 Formula 5
5.39.217.760 R8 f, D8 W4 U' I
11X must be 0 or multiple of 5$ e: y# Z- Y0 g" M
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM