That is a very simple mathematics question. ) j1 C& Q, e! t/ f; }0 x! DTVBNOW 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。Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb Y$ ^& P+ {1 n0 S1 H& T f- e
6x + 3y + z/2 = 100 Formula 1公仔箱論壇. W1 I; N4 Y! i7 k* P5 L
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb7 q' o2 t* Z/ z, l; {9 S `
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 ' x, I9 G$ r% uSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇0 ?9 T: ?5 L, t/ G" s) Z% M
Formula 4 can change into 11x + 5y = 100 Formula 5 ) z& u5 |( N; V9 ^0 ^, Q) fIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76 e8 e, X: V Y" x/ {# [
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 = 80.5.39.217.76( ?, j4 {/ T0 H; G3 ]5 I7 o
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 1 G8 N( a' m" T& _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 公仔箱論壇9 m% F' B& Y$ j8 q* A3 y1 z$ Z
11x + 5y = 100 Formula 5
+ N! R4 `, P6 \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。11X must be 0 or multiple of 5公仔箱論壇 K+ @% i3 [6 P/ a
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children' d9 T; h! D, I- Z+ l$ E- ]8 g
5 male 公仔箱論壇8 e$ V+ U1 F, k+ C. d0 b9 @* o7 k" T. p
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM