That is a very simple mathematics question.& q/ M. ? n# G
Let x = Male, y = Female, z = Child5.39.217.77- x" z! g9 @+ Y; d
6x + 3y + z/2 = 100 Formula 1 6 H4 f0 K5 T" K- m% Sx + y + z = 100 Formula 25.39.217.77- a! M5 I# B) O3 I; O3 w9 l: \ }0 X
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 - s( r0 s4 i' n8 \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。Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4$ X2 m. X8 a' }: M! a- {
Formula 4 can change into 11x + 5y = 100 Formula 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。7 e( Q8 j: c1 H- `
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.: t9 d- u B; I, `6 z% 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. % k# ^/ ?) _7 F/ X3 n+ V5 m; S5.39.217.77Eventually, 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 F- Z+ m. k+ j& { z; J( _; u! F5.39.217.770,20,80 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 4 U0 B6 d! N' H$ x7 x. ^) h
11x + 5y = 100 Formula 5
+ V$ Q2 @2 r6 a5 e/ X8 `5.39.217.7711X must be 0 or multiple of 5 . }& z/ T+ k9 o0 ?& g8 o- \tvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
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