That is a very simple mathematics question. 7 i. a5 {# ~ Q3 d3 f0 sTVBNOW 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 2 E$ A+ w7 ]+ \2 x; ^; Z1 T4 j& _5 b, K6x + 3y + z/2 = 100 Formula 1公仔箱論壇% L# ^3 [) X3 T
x + y + z = 100 Formula 2 ; [+ W. @( q1 D1 [9 @" WTVBNOW 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 ' j( I- M3 _" N: D/ Q7 v公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 9 B0 |, x' S9 SFormula 4 can change into 11x + 5y = 100 Formula 51 `. d4 a2 D( y6 w, B; Z& t
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。5 @0 S! ~/ D4 ~9 ^
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.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。% L3 e) |' q; e$ u& }
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
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0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
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11X must be 0 or multiple of 5 1 I' O& f5 F, A8 B4 z% ?9 y% Vtvboxnow.comthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
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9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM