That is a very simple mathematics question. 7 U% q: w' L' `( c5 l- ^6 cTVBNOW 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 = Child公仔箱論壇& S# j( C' o- L
6x + 3y + z/2 = 100 Formula 1 4 k7 z; ]0 ^) q4 M# N* zx + y + z = 100 Formula 2 & L% \7 N" S# S) G' Twww1.tvboxnow.comSimplify Formula 2 into z, we get z = 100 - x - y Formula 3TVBNOW 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。* f; {- T6 D4 j' j2 @7 |
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4www1.tvboxnow.com9 ~8 i- Y" R# j+ g/ m8 h! [1 M
Formula 4 can change into 11x + 5y = 100 Formula 5 - Q& X T0 e& Lwww1.tvboxnow.comIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb$ \& q7 j$ f: g7 X- b( a
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. 0 `# l$ f- ^- Y9 |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
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11X must be 0 or multiple of 5 9 y, V4 c4 w6 Vwww1.tvboxnow.comthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM