That is a very simple mathematics question. 8 i: m ~, N+ T7 l8 A1 V9 gTVBNOW 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 1 h! s1 N2 S" w8 c6 o公仔箱論壇6x + 3y + z/2 = 100 Formula 1www2.tvboxnow.com" m( b$ e9 x* r' p' |9 S2 N4 s
x + y + z = 100 Formula 2 . o! f$ J/ _+ [5 uSimplify 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。1 j. s' W/ p) x9 w1 W
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 " Q# o, A; m1 o; l$ @4 c8 \Formula 4 can change into 11x + 5y = 100 Formula 5 - h: R' J+ i' w8 k" F& `tvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 9 B3 i3 s" y; nAnd 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./ p6 E% F- t7 ~3 a M6 O D5 m8 \
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,children: t$ r7 w4 t# A' {1 z
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 4 y/ d) u. Q, ?# S! C
11x + 5y = 100 Formula 5
8 X. L9 ^' V2 V6 B; }( k) }tvb now,tvbnow,bttvb11X must be 0 or multiple of 5www2.tvboxnow.com, F; M3 r3 q: O" `0 ]% d5 ]: `& j
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 childrenTVBNOW 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。8 M+ {- m' h ^) X2 `0 k& B
5 male www2.tvboxnow.com: d$ W L+ ~" S
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
4 y/ d) u. Q, ?# S! C
