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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,bttvb1 l- E, u m: I8 K9 l; ?8 Z
100人當中有男人、女人同細路仔
1個男人搬6塊磚公仔箱論壇9 a- U6 B' B! M/ i: ^3 r
1女人搬3塊磚tvb now,tvbnow,bttvb# u9 E* v9 F/ L/ X3 D
2個細路仔搬1塊磚
**************************************************************公仔箱論壇" o, d' X; `4 H* b2 K1 Z
問搬100塊磚4 B4 _) j8 [+ i
要幾多男人、女人同細路仔
tvb now,tvbnow,bttvb) v5 _3 b$ U$ m. g& |: ]8 g5 Y
答案30號公佈
tvb now,tvbnow,bttvb; o: E& e8 l' H# G
[ 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 = Child0 a; h/ k7 t5 X. Q
6x + 3y + z/2 = 100 Formula 1; h- `/ f9 n) z# E9 Q5 ]# C6 y
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb- k7 ^5 ^) _& O8 J, h6 I% Y
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
Formula 4 can change into 11x + 5y = 100 Formula 54 f( x, T0 X8 o5 X. W. `4 W5 j4 X# e5 k
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.4 m" h8 ]! [6 R* u! T& L" l% I4 e
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.
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 ! }1 T, l, ` @- k5 V0 i0 i3 L
11x + 5y = 100 Formula 5

1 f. j% E2 i: D% Q4 x, S
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 children1 Q2 N: x. Q% e
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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