That is a very simple mathematics question.公仔箱論壇 x6 ^, w9 i) z: n
Let x = Male, y = Female, z = Child公仔箱論壇8 F: w% [( y4 q' ^! w% R1 w
6x + 3y + z/2 = 100 Formula 1 % P; b# `/ h3 N- w' U# k: j公仔箱論壇x + y + z = 100 Formula 2 ' Y; ~0 Z( y3 F5 l公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 3 @) j7 W: {& ~3 I9 HSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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 c* v" f" a0 }; K, {: s5 M
Formula 4 can change into 11x + 5y = 100 Formula 5, c2 I3 o. v) f2 q
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 5 t3 X4 M! u) O& \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. 6 b7 w1 Y/ p' h! aEventually, 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
) F9 T# D' Y" Q: l/ v- t公仔箱論壇11X must be 0 or multiple of 55.39.217.765 a% V Z3 U% Q+ ~) y
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children % a( e0 a; w: O# p5.39.217.765 male 6 _. \3 o0 w; S0 Q7 S. r. S: Q
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM