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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
0 T  M4 Z2 v6 }  q3 W5.39.217.76規則公仔箱論壇8 t1 c" k6 v. H/ @. H9 O7 Z
只何用100人搬100塊磚,不能多也不能小...( C5 N8 y) n$ o4 ^. p% l
100人當中有男人、女人同細路仔公仔箱論壇5 C" \* `3 F' ^+ y1 G/ Q
1個男人搬6塊磚
: ?( {7 l" r" g8 o, ~1 c9 Z5.39.217.761女人搬3塊磚9 D: J0 M# ~4 W" ?7 p6 h
2個細路仔搬1塊磚
+ T6 @: ^; ~; }: Y+ f0 [6 J**************************************************************
5 Q5 i, l( g* ^$ Q. R* gTVBNOW 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。問搬100塊磚0 y7 i! A, k1 E3 ]9 m' l: {
要幾多男人、女人同細路仔! m  n0 I$ {: X$ ]' x+ D5 R. \# @% ~0 ]/ w& O
tvb now,tvbnow,bttvb* h0 I0 R7 a/ h0 x" v
答案30號公佈
! W2 F: W4 x; `) d$ }- f+ A- ?5 w
9 Y0 [. M6 l8 Y9 e5 E- D: O- `5.39.217.76[ 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.
: r: Z% o2 f0 v; f& RLet x = Male, y = Female, z = Child! j% S& G* E& b4 ~. s; x5 m
6x + 3y + z/2 = 100   Formula 1
, m' g9 J6 s, S) \5.39.217.76x + y + z = 100    Formula 2tvb now,tvbnow,bttvb; K, O( t+ D% I' H+ u: ?
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
  D/ U" T4 \% z, P8 ^tvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
( k& u& Y; t6 y6 e5.39.217.76Formula 4 can change into 11x + 5y = 100 Formula 5
9 Y' s2 u) X/ s% _In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
9 O$ [: b7 V& p8 [& O/ c1 m5 ^5 t$ e% 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 = 80.8 v9 ~9 P; k; l% i  I" B
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
! M7 y1 G# h5 @# `; S0,20,80 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
9 z$ {8 s* q# b+ |" D; T" F1 g公仔箱論壇11x + 5y = 100 Formula 5
tvb now,tvbnow,bttvb/ |0 o; i; J4 j7 L# F6 |' Y" {
11X must be 0 or multiple of 5公仔箱論壇3 u& F8 B) s0 L" [! S7 z3 L
that meanz x must be 0 or 5
作者: manstein    時間: 2007-10-15 08:28 PM

86 children5.39.217.76+ N* X3 h, B# S# t* c
5 male 5.39.217.76: D" z2 m4 w, j( T# ?. ]
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1 m1 P& o) t! O
          5        9       86
作者: fristz    時間: 2007-12-6 10:09 PM

thx4sharing




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