100人搬100塊磚 4 E- ?* f8 d4 ]0 N& l. X9 X: MTVBNOW 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。規則5.39.217.76, I. a0 c6 S" T8 Q2 {9 s3 h; P
只何用100人搬100塊磚,不能多也不能小...5.39.217.764 {7 T L3 h: p' b! D
100人當中有男人、女人同細路仔tvb now,tvbnow,bttvb# L: c3 Y1 \- i8 E( [1 R2 O( p: ~$ z
1個男人搬6塊磚 ; f4 o ]; ?4 f; g! G3 ^1女人搬3塊磚5.39.217.76+ o; e0 A$ x% H+ s; p
2個細路仔搬1塊磚 6 n) F0 y8 V/ s p1 k5 ^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。**************************************************************5.39.217.76: L. h0 c! L y- V; |
問搬100塊磚 : g0 P! }$ Q& l- {/ W, H要幾多男人、女人同細路仔. i. |3 e2 D5 S+ h+ v5 @
5.39.217.76; i6 o0 K3 @; Q3 U2 @0 p+ V7 {
答案30號公佈 8 w* Q7 \2 {8 w$ y. {tvb now,tvbnow,bttvb公仔箱論壇0 ?; m/ Y( i9 u0 X' T
[ 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.tvb now,tvbnow,bttvb5 x6 g* ^7 O1 A' R; K: S$ a
Let x = Male, y = Female, z = Child # B2 C) g T6 a! S6x + 3y + z/2 = 100 Formula 1 1 [' S0 K t# c4 U) Q5.39.217.76x + y + z = 100 Formula 2 9 T# X: ]! S2 M9 y; u公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb Q0 }& S- S- d. w" I
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 3 M! ]7 r) z8 F# T' V& ?# ZFormula 4 can change into 11x + 5y = 100 Formula 5 4 Q9 u+ O8 k; {/ Z* b% s% s' AIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。/ d! s( R4 o3 q0 d8 G/ l$ M
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. $ N7 p* F9 E4 c* |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,children" X \6 }2 h2 Z& l) f
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
