100人搬100塊磚 " e! E6 }( t. _: X公仔箱論壇規則 3 P" w; p' G4 C: k8 \tvb now,tvbnow,bttvb只何用100人搬100塊磚,不能多也不能小...; x. h+ r1 i7 F3 v* l
100人當中有男人、女人同細路仔 % M, d8 S) I4 \( l+ _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。1個男人搬6塊磚 ! I+ X$ e5 a2 j7 X" RTVBNOW 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女人搬3塊磚 3 Z) }+ m, P- e/ {- Y& vTVBNOW 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。2個細路仔搬1塊磚 A; _2 o- }& t ` J$ E! | BTVBNOW 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。**************************************************************tvb now,tvbnow,bttvb+ P1 M7 z5 U' A. I L% v2 m. e8 M. w
問搬100塊磚 9 }, y' d3 s3 R3 c9 c7 D+ z公仔箱論壇要幾多男人、女人同細路仔 % l9 t, N6 N. ~7 L8 u* S公仔箱論壇tvb now,tvbnow,bttvb% X9 S) e1 `9 ^0 b
答案30號公佈 : u$ y0 N' T0 p' Y3 m! L$ K 7 N8 ~+ A( ^7 E ~3 H5.39.217.76[ 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.5.39.217.76& f p. l7 p( h9 G! B( j# C8 J
Let x = Male, y = Female, z = Child' L( Q1 g3 s0 e+ z
6x + 3y + z/2 = 100 Formula 1. g2 o' u& ^: \ i, }3 O
x + y + z = 100 Formula 25.39.217.76. A% _' l$ Q# m1 h3 r5 n) {
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.76. o8 s3 n! P9 j- g
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 " L. @3 _2 r/ DFormula 4 can change into 11x + 5y = 100 Formula 5 ; s& O; D; A7 }! J6 OIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇! O8 ]- f+ M8 y$ D" 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 = 80.5 f: M+ h6 Q7 `: S- f- d) \6 |
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
man,female,childrentvb now,tvbnow,bttvb* u4 A! h# P9 |3 l. x k& p
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
