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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
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
1個男人搬6塊磚tvb now,tvbnow,bttvb* S  z  ]; B$ F) {: ~
1女人搬3塊磚
2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
要幾多男人、女人同細路仔* O% O! F8 u! H4 B

答案30號公佈
9 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.
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + 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
Sub 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
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* 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
that 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
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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