That is a very simple mathematics question. & A! q4 @, Y7 S8 z3 v) b% h, F公仔箱論壇Let x = Male, y = Female, z = Child ; i0 F0 m: K+ o9 _公仔箱論壇6x + 3y + z/2 = 100 Formula 1 ; W8 m; f0 T0 M3 Y公仔箱論壇x + y + z = 100 Formula 28 e5 u9 Q+ j$ L9 p$ `* d' u4 |" Y
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 : D2 k" |# z- ^公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 - |$ m7 P5 D' d' uFormula 4 can change into 11x + 5y = 100 Formula 5 5 p) M9 k$ ], g+ Z1 T% c1 E$ jtvb 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。, e0 ~- b2 b: H6 c( y3 q
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* K5 F$ T2 o% o5 s$ r" E: _
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
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 p4 f; N- i' Z U! D11x + 5y = 100 Formula 5
8 f" X8 G2 |* Q% _) |; _11X must be 0 or multiple of 5 3 |; M2 Y: t# G+ h: ~1 A# Xtvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children / ^) \5 m' w$ }5 male 4 A* x6 i! x$ m, S& \8 Q% B
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM