That is a very simple mathematics question.www1.tvboxnow.com% C6 P; I$ m0 m6 C9 |
Let x = Male, y = Female, z = Child ( }$ \9 r* ]4 t公仔箱論壇6x + 3y + z/2 = 100 Formula 1 ) Z: [! i9 R9 X9 g) m7 T7 h, jx + y + z = 100 Formula 2www1.tvboxnow.com5 K$ k7 u% ?4 A" ]
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb% F$ G7 Y' x+ J3 i8 |0 g! Z4 x
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 # z+ {6 |, J2 s+ P! [6 u. mFormula 4 can change into 11x + 5y = 100 Formula 5 ( i/ f' q& ?9 e: x. ]+ W( p% itvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. / j* K; L$ k; j g3 e: 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。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." A1 A: S0 \% A- J. s% ]
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
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 / y, \6 g3 C$ l2 Z
11x + 5y = 100 Formula 5
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11X must be 0 or multiple of 5TVBNOW 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 q9 K. S) _! w7 q. ~; v
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children# f. c0 X+ c: @ Q1 q( R% g9 v S
5 male 公仔箱論壇. [. p9 G: Q9 B& z9 | f
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
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