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標題: [IQ題] [數學題]100人搬100塊磚 [打印本頁]
作者: 1/5    時間: 2007-10-13 05:08 PM     標題: [數學題]100人搬100塊磚

100人搬100塊磚
' M0 y  O/ n- `3 f# U# B公仔箱論壇規則
% A4 c/ C6 A. M  o: X0 x只何用100人搬100塊磚,不能多也不能小...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。" Z+ c; n0 m' B# ^
100人當中有男人、女人同細路仔
  v: W* W+ y! t( L) p  c) c- b公仔箱論壇1個男人搬6塊磚; X& Z7 S! j! d" Y2 H1 w
1女人搬3塊磚5.39.217.776 G- N7 K3 u6 g* P1 q' a; s
2個細路仔搬1塊磚
1 l) U+ m, y: ?0 D/ X7 c**************************************************************5.39.217.777 J, J/ y' j( }, b
問搬100塊磚5.39.217.778 b, {1 d- _  c8 P. b
要幾多男人、女人同細路仔
1 i2 M+ J7 r, V7 P* p: D- M" Itvb now,tvbnow,bttvb公仔箱論壇7 X) z7 {$ c. u% r4 m2 h
答案30號公佈% q5 a, {( Y4 y4 P/ G

4 x6 l$ A# E6 h0 ~& m' d; ~8 Q2 ?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。[ 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.
, @# F6 H9 h" M% m0 |公仔箱論壇Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb$ o% v/ x1 x- d4 f1 w
6x + 3y + z/2 = 100   Formula 1
, p, c% K: k* h) M+ btvb now,tvbnow,bttvbx + y + z = 100    Formula 26 G' ^/ f: i' ~/ p6 G% c! R" h0 q
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.77+ H0 D& O( Y: o$ n+ x3 V
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
& U$ I" [. s8 V2 c/ u5.39.217.77Formula 4 can change into 11x + 5y = 100 Formula 5
1 p! |( u. l+ ~5.39.217.77In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
, M' h% j) {! p+ F6 a$ ]3 PAnd 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 = 80.5.39.217.779 r/ n+ Q' a8 Z8 i7 l* W
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
! k" E+ m# w5 p! S$ f5.39.217.770,20,80 or 5,9,86
作者: RyanC    時間: 2007-10-14 10:46 PM

原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表
+ D; {" h. z8 |% ^/ xtvb now,tvbnow,bttvb11x + 5y = 100 Formula 5
5.39.217.774 Q0 P2 Z: g0 x9 ?! T
11X must be 0 or multiple of 5/ V1 z5 S! Z% m  v4 |
that meanz x must be 0 or 5
作者: manstein    時間: 2007-10-15 08:28 PM

86 children6 W# {( D" K/ U" |( v0 R' M+ G
5 male - i) H5 Z" |; M" X  C. r6 D
9 female
作者: dafunhei123    時間: 2007-10-15 10:39 PM

数学问题，线性代数，我算算再说
作者: dafunhei123    時間: 2007-10-15 10:47 PM

4楼5楼的算对了。看来这里的人也很无聊，线性代数，大学的教材
作者: ghjleo    時間: 2007-10-17 04:23 PM

5,9,84
作者: leou2830    時間: 2007-10-20 10:21 AM

想知道耶
作者: 1/5    時間: 2007-10-30 01:02 AM

答案:  男人   女人   細路仔
$ U; E# ~* y" m# \, ?! ?tvb now,tvbnow,bttvb          5        9       86
作者: fristz    時間: 2007-12-6 10:09 PM

thx4sharing



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