That is a very simple mathematics question. 8 `4 D0 K) R4 ^0 b' r/ XLet x = Male, y = Female, z = Child + z; J% `) c; f3 g% X5.39.217.766x + 3y + z/2 = 100 Formula 1公仔箱論壇. z+ Z& u j" e8 ]' V& p, j
x + y + z = 100 Formula 2公仔箱論壇7 I7 e; c& S# B$ n1 |1 D/ X( ^0 Q
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3' x* A7 s! ?( L+ z" y( [
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 . \7 ^& f6 _& J {; z$ aTVBNOW 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 5tvb now,tvbnow,bttvb( b5 A0 K3 x' V+ N2 k V' t
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.% {: t0 [# Z7 j' x C% z
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. * v7 _1 e2 y: X/ K& Y3 bEventually, 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 9 l( E r5 D# n' [9 y( |$ O0,20,80 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 5 d' U) D, h' _6 ~- e' h
11x + 5y = 100 Formula 5
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。( f$ G0 @. S+ |" c! U
11X must be 0 or multiple of 5公仔箱論壇. s+ ~2 \+ m$ ~5 Z4 R& n7 w
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children5.39.217.76' c* R- j& N$ \/ @9 f
5 male 1 x3 w1 s/ P' k# d9 n( ~tvb now,tvbnow,bttvb9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
5 d' U) D, h' _6 ~- e' h
