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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8 J1 v8 b5 j( N  N- j7 _+ p  y
規則
" Q$ z+ y* U6 L$ Q5 ^只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb1 Z& n9 Y4 g$ C+ Q
100人當中有男人、女人同細路仔
  I$ L1 d* i4 G5.39.217.761個男人搬6塊磚tvb now,tvbnow,bttvb* S  z  ]; B$ F) {: ~
1女人搬3塊磚
* U& m/ f7 ?& V/ F% l5.39.217.762個細路仔搬1塊磚5.39.217.76/ u% H8 L& @0 T/ p/ d% v8 w" F
**************************************************************tvb now,tvbnow,bttvb1 I7 B  @7 ]+ v6 |; }/ R' A. s
問搬100塊磚
8 Z, {5 b! Z% j1 N; [5.39.217.76要幾多男人、女人同細路仔* O% O! F8 u! H4 B

' e$ k5 ~! q! W3 R5 T, p4 L! v+ Ctvb now,tvbnow,bttvb答案30號公佈
2 f6 M* z7 @2 W2 c9 N" S1 [9 e% o9 i5 \3 f; y/ [0 t, @$ ~" R
[ 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.
2 z. P$ K/ q; y4 f* cLet x = Male, y = Female, z = Child
+ H" G) A! m0 p- ltvb now,tvbnow,bttvb6x + 3y + z/2 = 100   Formula 1
9 O) C- q% h. Q7 _3 Z: J3 w, J. l5.39.217.76x + y + z = 100    Formula 2: z% b1 R. m$ v7 F; |) w) r' e6 A
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
  x1 P& ^  _& i- [7 w5 n# m& Y6 j0 ^5.39.217.76Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 46 V; _- e7 u) @6 ?  C; G4 G, `
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇7 E+ k+ f/ g2 h+ q% o& C. P
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb- ?# J5 T) X6 r
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 = 80.7 i1 K1 M8 c4 h! a
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
/ K8 b8 u5 H  O. m5.39.217.760,20,80 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 公仔箱論壇* b0 X  P" f  ^& T7 B# J0 ^' V* R
11x + 5y = 100 Formula 5
9 r. d- R' L0 \  \7 ^- R3 C+ y
11X must be 0 or multiple of 5
- w9 ?# Z5 l- h: j" ~0 v- n5.39.217.76that meanz x must be 0 or 5
作者: manstein    時間: 2007-10-15 08:28 PM

86 children) e. W4 a& `7 M. [" M2 a
5 male
2 ^& r: p4 h/ J5 ]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
" I5 {- K* I- i& O5.39.217.76          5        9       86
作者: fristz    時間: 2007-12-6 10:09 PM

thx4sharing




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