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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...公仔箱論壇" a, L! W) q+ {' @8 D1 h1 N. F
100人當中有男人、女人同細路仔公仔箱論壇. ]/ m7 R1 c" E* J7 m0 Y' y i
1個男人搬6塊磚5.39.217.77* M2 Q" J# J# u
1女人搬3塊磚
2個細路仔搬1塊磚
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問搬100塊磚公仔箱論壇' k+ h$ J t y; }9 W- L( S5 }
要幾多男人、女人同細路仔9 ^9 X# P6 a, f+ X3 q6 N
5.39.217.77) f3 @8 O7 E+ }" r7 r
答案30號公佈

[ 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.tvb now,tvbnow,bttvb5 W5 X. b2 @: O& l
Let x = Male, y = Female, z = Child5.39.217.772 A3 O# J8 Z x/ k: N
6x + 3y + z/2 = 100 Formula 1TVBNOW 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。5 v) [( c/ Z8 ~5 G* P5 Y
x + y + z = 100 Formula 2
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 5
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇5 z1 d# x6 `) W' |" F0 h
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.tvb now,tvbnow,bttvb6 L$ C/ n) m- V% K4 k4 X6 C( v! t
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,children5.39.217.77" ]7 {- Y# Z/ t+ y
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 tvb now,tvbnow,bttvb0 c* W1 N" V8 n" d4 q
11x + 5y = 100 Formula 5

公仔箱論壇$ m- E2 A6 E, X+ a! c3 d
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
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# K9 t, F$ g3 D2 f
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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