That is a very simple mathematics question.tvb now,tvbnow,bttvb5 m2 b# a! Y/ k# n# K
Let x = Male, y = Female, z = Child$ j1 x; ?3 x# A7 M7 G
6x + 3y + z/2 = 100 Formula 1 2 V$ O2 p$ k+ \5 |, O5 [# C9 C公仔箱論壇x + y + z = 100 Formula 2 * X& n! O" ^# ~) JSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 ) ?' i4 t' x$ I+ `* ?1 Y- u& d. k5.39.217.76Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45.39.217.76( W1 `5 y. A% a% J: s1 {0 G
Formula 4 can change into 11x + 5y = 100 Formula 50 O( b# j& f# u, f' m
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.TVBNOW 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。& \9 C6 f( M/ @9 ]+ y0 [
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 d5 M) n1 s0 N5.39.217.76Eventually, 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 6 b* a- j N/ n' d! k) a$ V0,20,80 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 , y1 c7 G+ H ~: {; e, U6 L11x + 5y = 100 Formula 5
( G+ o# P2 j9 |% c( @' A }7 W11X must be 0 or multiple of 5 ' h# e$ C7 k7 U" nTVBNOW 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 children " o! }* f& Z* ^ n/ C" p/ c6 w) ~5 male " u8 s+ w8 L w+ W5 c+ W9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM