That is a very simple mathematics question. " z* W2 x/ ^! T5 A; T; f: r" ytvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child公仔箱論壇" u3 O5 B% V" m* p# w7 M
6x + 3y + z/2 = 100 Formula 1公仔箱論壇$ s& f$ N( |) w9 r0 K" s& G3 L! X
x + y + z = 100 Formula 2 % _. T1 |6 D9 Z& G K- C+ n |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。Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 & ^$ ^4 s4 _( ^& \. ?5.39.217.76Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇% U9 Q. x% W+ F# w; C2 Z
Formula 4 can change into 11x + 5y = 100 Formula 55.39.217.766 d4 Y4 V; W+ I2 D( q
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. * I# Z2 e& J( d8 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。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. % o" W% p( I ?6 u; E5.39.217.76Eventually, 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
! ]1 h$ {6 S& j0 L* f% s& L, u$ o! h4 Q11X must be 0 or multiple of 5- W) ^, L8 s; `" I
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 1 e" P+ a0 p% D7 x1 a) nTVBNOW 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。5 male tvb now,tvbnow,bttvb+ c* S( g( e4 S# O
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM