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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
規則
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb; N. b5 v8 U) u* u
100人當中有男人、女人同細路仔
1個男人搬6塊磚; n) v* {% A& T1 w0 J) v( i
1女人搬3塊磚# Z K# T" t0 r+ K
2個細路仔搬1塊磚
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問搬100塊磚tvb now,tvbnow,bttvb- b- |# f+ y3 o
要幾多男人、女人同細路仔2 D0 c5 b- |4 L* w0 l8 i$ e

答案30號公佈
& a$ m1 a' {9 q' o- O" 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.
Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb  Y$ ^& P+ {1 n0 S1 H& T  f- e
6x + 3y + z/2 = 100 Formula 1公仔箱論壇. W1 I; N4 Y! i7 k* P5 L
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb7 q' o2 t* Z/ z, l; {9 S  `
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇0 ?9 T: ?5 L, t/ G" s) Z% M
Formula 4 can change into 11x + 5y = 100 Formula 5
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76  e8 e, X: V  Y" x/ {# [
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 = 80.5.39.217.76( ?, j4 {/ T0 H; G3 ]5 I7 o
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
0,20,80 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9 m% F' B& Y$ j8 q* A3 y1 z$ Z
11x + 5y = 100 Formula 5

11X must be 0 or multiple of 5公仔箱論壇 K+ @% i3 [6 P/ a
that meanz x must be 0 or 5

作者: manstein 時間: 2007-10-15 08:28 PM

86 children' d9 T; h! D, I- Z+ l$ E- ]8 g
5 male 公仔箱論壇8 e$ V+ U1 F, k+ C. d0 b9 @* o7 k" T. p
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
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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