100人搬100塊磚tvb now,tvbnow,bttvb5 {1 U2 O3 `$ J3 R; z; E; M! I
規則 + D( A5 T9 I* w- _6 E只何用100人搬100塊磚,不能多也不能小...& @3 e, w' A2 V
100人當中有男人、女人同細路仔 - }$ i& H7 E& k8 W- ]6 Ptvb now,tvbnow,bttvb1個男人搬6塊磚 " G( N) [* V9 N( C; ^+ G5 E& O1女人搬3塊磚公仔箱論壇9 L* f$ s; v; ~# Q- ^+ U6 I! ?
2個細路仔搬1塊磚 ; e. x: c! }9 ~, c# p9 L a**************************************************************5.39.217.76# x7 v5 {0 X8 ^6 b2 s7 v
問搬100塊磚5.39.217.76" L! ~. J( s) V# D; p
要幾多男人、女人同細路仔& S4 m( \+ F" p y
tvb now,tvbnow,bttvb; Q, Y( r( F( }# R7 i& V2 q
答案30號公佈% \5 U1 i9 r: l
tvb now,tvbnow,bttvb" E% G# f- D1 J. s# Q8 Y- p! B2 g4 u
[ 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.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。" K/ G7 n( s7 s! E" f9 Q3 ?' K
Let x = Male, y = Female, z = Child# v5 p* T' ^; s! K* W& C: [
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb8 r2 W$ W% S& x# |
x + y + z = 100 Formula 2 " n. _ \/ \7 \7 p% |Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb6 o( ]- }; R+ b) T/ z. k4 S
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 5 y5 v# I! o4 Ctvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5 2 I, C- z' Q- M# D5.39.217.76In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ! E+ @4 Q0 F5 K* w, L公仔箱論壇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.# a5 {: v% b: d7 W9 d
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
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。' Z3 x7 {( O0 Y9 O' D1 A
11X must be 0 or multiple of 5tvb now,tvbnow,bttvb( C1 Z6 c) Q9 \/ b# n
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 childrentvb now,tvbnow,bttvb7 J( B6 w5 I7 x; h
5 male 公仔箱論壇& j9 u) m* W& [- N% j0 p5 g
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
