That is a very simple mathematics question.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 ?9 S% r( H# t0 f8 j8 s* D7 L; l
Let x = Male, y = Female, z = Child ; Y/ \ t9 d% 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。6x + 3y + z/2 = 100 Formula 1 3 E" E5 C/ F- u" P6 ^tvb now,tvbnow,bttvbx + y + z = 100 Formula 2 9 x! |; F, C. g2 I+ eTVBNOW 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 / h- f# _7 Q5 `: Q2 Y4 uSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 0 q& b6 J8 V/ Y' \; n0 rFormula 4 can change into 11x + 5y = 100 Formula 5 : \5 A8 g6 a4 N! J* Ttvb now,tvbnow,bttvbIn 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。- T: F6 k% N4 Q- E& O
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. ; P# L' ?6 ^. e4 tEventually, 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,children5.39.217.76- A# u& a5 B" B4 U# o9 b
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 / M" P/ `$ X O) S
11x + 5y = 100 Formula 5
, x/ k5 b% Q# X! }- atvb now,tvbnow,bttvb11X must be 0 or multiple of 5 0 U3 f4 J3 a# U: O( `that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM