100人搬100塊磚 $ y' c# g( W8 q+ W S公仔箱論壇規則 3 U j" ~$ Z# @# j' l7 M8 b只何用100人搬100塊磚,不能多也不能小...9 J% o2 `3 i9 |' Y
100人當中有男人、女人同細路仔www.tvboxnow.com7 Q6 \6 [2 m4 n8 Y
1個男人搬6塊磚 1 O. F, S8 Z3 V# Q) }5 l1 z公仔箱論壇1女人搬3塊磚( }5 I; e5 S5 \( m! {( G
2個細路仔搬1塊磚tvb now,tvbnow,bttvb3 n' F5 _2 }! h+ v3 r" F
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問搬100塊磚 " l0 i& @: o; t# Kwww.tvboxnow.com要幾多男人、女人同細路仔' h: H) C* _- O2 @! K. d9 V9 Z: V
www.tvboxnow.com' I. b. m: w7 |0 V# x0 `
答案30號公佈" I. _* d. N0 L [
tvb now,tvbnow,bttvb/ ~! E) m/ `3 A5 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.www.tvboxnow.com; s( f+ |2 {! y% L
Let x = Male, y = Female, z = Child( Q# c# C0 t s- D* \
6x + 3y + z/2 = 100 Formula 1TVBNOW 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。4 P# F& L7 |% `0 y+ X( s
x + y + z = 100 Formula 2公仔箱論壇: p+ g3 J6 j2 H: C. S7 \
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3www.tvboxnow.com8 _% a' i/ l# X" B0 H* X2 c3 X
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 48 \# o7 [$ G! J7 x, p
Formula 4 can change into 11x + 5y = 100 Formula 5 ' L! a! f% ?" Y6 U! x( ptvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 2 J; `0 l. R4 b8 v1 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。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. 0 R* B5 [+ _# Xwww.tvboxnow.comEventually, 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
