That is a very simple mathematics question. \* s: S0 M( _% Btvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child% H$ S' A p; x4 t
6x + 3y + z/2 = 100 Formula 1 * ~0 z- M' \+ U' L& a/ |" M: E2 vtvb now,tvbnow,bttvbx + y + z = 100 Formula 2 9 e9 J8 C$ G2 x8 m/ l& I& Y5 qTVBNOW 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 ( c& Y3 U9 G. k, x- R+ C! @6 I5.39.217.77:8898Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 8 H# j, i9 n5 F# F8 t1 @; E4 R% wFormula 4 can change into 11x + 5y = 100 Formula 5 U+ y/ {& @5 m* v7 ~0 Q5.39.217.77:8898In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.# f0 I% z0 f9 G- H. T/ L
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. , u7 G8 t# l4 H5 g' I# R5 oEventually, 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,children ( p$ u6 Q) J/ g. q5.39.217.77:88980,20,80 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 6 S1 Y" K. E, m# ]9 _+ M8 H5.39.217.77:889811x + 5y = 100 Formula 5
5.39.217.77:88988 D% _0 V' R0 X) d/ z8 u
11X must be 0 or multiple of 5 6 k1 [ {' f4 w, z$ H) zTVBNOW 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。that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children5.39.217.77:8898* I/ U: U% E% g. h# h8 h
5 male c, P3 f8 q6 b3 A6 p9 Q
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM