100人搬100塊磚 . m0 b' a& {2 ntvb now,tvbnow,bttvb規則公仔箱論壇) @, K9 b$ o U: p- ~1 f
只何用100人搬100塊磚,不能多也不能小...- T( G0 M7 P7 ~3 W1 B
100人當中有男人、女人同細路仔 + h$ y5 {4 o+ j& C5 |1 X6 ^tvb now,tvbnow,bttvb1個男人搬6塊磚 ) W$ y. N+ z% x, F% i1女人搬3塊磚 2 N! _6 d$ n5 ]4 _9 w' y! [公仔箱論壇2個細路仔搬1塊磚 P0 H- n. n" w M$ M5 p4 Y; vtvb now,tvbnow,bttvb************************************************************** f+ L& x5 y5 t @; F
問搬100塊磚 8 P& d3 x; K" N" }7 H+ N! Q公仔箱論壇要幾多男人、女人同細路仔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。$ Y' q1 r0 D. z& q' o( t
tvb now,tvbnow,bttvb/ ^# J$ r; Z d: s
答案30號公佈 1 x. l7 v, v' z6 [公仔箱論壇tvb now,tvbnow,bttvb; j" m, u {' e3 S
[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]作者: twinsdragon 時間: 2007-10-13 05:40 PM
That is a very simple mathematics question. ! o# U% w2 A% r ]7 j }6 ltvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child ; O$ d. X3 X* G/ \. C5 ]# gtvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 18 f2 H( e) c6 x. D; a& h) Q: q; N
x + y + z = 100 Formula 2 # F' W, ]9 k3 t& U. RSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 . f M" O$ B* a! V: Y W; KSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 & \4 d+ P" Z7 y5.39.217.76Formula 4 can change into 11x + 5y = 100 Formula 5 + O, s+ S2 X* @- o& uIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76. Y+ i; q: h: K/ S5 I
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 = 80.5.39.217.76$ H y: m5 g4 o/ }7 G! z* |! ?1 F. g1 f
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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11X must be 0 or multiple of 5 * i- V! S$ f- i1 f' j2 R/ r5 aTVBNOW 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