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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
5 Q0 P8 S1 g( u* {/ B, V6 q9 V. q/ [公仔箱論壇規則
! Y! \3 u( e% z: S% C5.39.217.77只何用100人搬100塊磚,不能多也不能小...
. d1 C; x% Y. ~( W, B6 I) }, W5.39.217.77100人當中有男人、女人同細路仔公仔箱論壇, J' f5 t* `% D' T4 x; I+ v, v
1個男人搬6塊磚
/ h8 @; h; |3 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。1女人搬3塊磚" `1 X& q2 ]3 C
2個細路仔搬1塊磚, a  F6 T8 w" _( ^- X& V! W4 Q/ r
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9 u+ f+ l$ ]. T問搬100塊磚
  }+ y8 |/ d/ z1 w7 d# Q  K3 I' x" t要幾多男人、女人同細路仔
( q* `. E1 f/ z8 q/ w/ x公仔箱論壇5.39.217.770 c3 e6 d" e' W, Y1 y9 W
答案30號公佈
& B/ l! C5 n) q/ J
6 u: V  Y) l/ ]$ V+ y  n公仔箱論壇[ 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.5.39.217.77* ^# |0 _1 j: u! o
Let x = Male, y = Female, z = Child, [% h0 E0 P4 E6 m5 l7 x
6x + 3y + z/2 = 100   Formula 1tvb now,tvbnow,bttvb4 i' p! X( W3 r! w* j* W
x + y + z = 100    Formula 25.39.217.779 j  m$ ~/ t, c4 x: @6 \) Z1 S3 `% E
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
2 x+ ^, `. }3 aSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
7 g/ B, W/ a& n2 o" @" @5.39.217.77Formula 4 can change into 11x + 5y = 100 Formula 5
  J7 ~& m: r4 X5 f5.39.217.77In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
+ I6 \7 ?! e9 y4 M  V8 Z! nAnd 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.公仔箱論壇6 Y/ k$ S0 k2 E. M) u
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
: o0 G/ h: q* b" {tvb now,tvbnow,bttvb0,20,80 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
, c7 o0 S; n2 `( w! }11x + 5y = 100 Formula 5
5.39.217.775 V6 x) i: L; ]5 V; r7 Q- R
11X must be 0 or multiple of 5  u; t) Y5 j$ n0 u, w) x
that meanz x must be 0 or 5
作者: manstein    時間: 2007-10-15 08:28 PM

86 children
* x; A) e, T" p+ M1 l- Htvb now,tvbnow,bttvb5 male
4 W9 F% R* h; u8 T: R4 Jtvb now,tvbnow,bttvb9 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5.39.217.77& U% [8 j1 J4 l9 L; G# ^' ^
          5        9       86
作者: fristz    時間: 2007-12-6 10:09 PM

thx4sharing



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