That is a very simple mathematics question. ! ~3 m" c- V3 Z* C# uTVBNOW 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 6 q* Y& e; @ V! d# s/ W I3 B+ m6x + 3y + z/2 = 100 Formula 1 " l8 ]; {) z O) D8 O) j* s. T公仔箱論壇x + y + z = 100 Formula 2www2.tvboxnow.com4 K( U" X- e) {% j* `1 C0 u
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 : v& i2 p7 B$ ?" [5 G; bTVBNOW 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。Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 2 v7 R7 S6 q7 y/ ]3 FFormula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb& I' C) h |( A; R6 `
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb3 Y4 O5 `, [+ I) l4 e% t2 G; a4 `" p
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.公仔箱論壇% D/ m( D2 y, d7 g# ~
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,childrenwww2.tvboxnow.com R* E" \ k7 j \9 p5 T/ R
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 tvb now,tvbnow,bttvb# g. }- g% |) j. ^
11x + 5y = 100 Formula 5
6 _( {5 e4 F: |- J# T4 f8 ltvb now,tvbnow,bttvb11X must be 0 or multiple of 5www2.tvboxnow.com, U1 q% H: x9 p
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM