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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7 H& U9 \+ ^9 R8 w6 L! d
規則TVBNOW 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。; S) S$ X$ i5 ^/ b, M7 V+ c
只何用100人搬100塊磚,不能多也不能小...5.39.217.770 e6 F  O; W. R; {
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' g$ D! h" y; _* Y; Q) H- i4 t  H
1女人搬3塊磚$ K* d2 D  a4 L1 T; B0 u1 o
2個細路仔搬1塊磚
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問搬100塊磚, L( N$ t2 s3 X6 ?. g
要幾多男人、女人同細路仔

答案30號公佈! {* Z; L$ F* r+ O4 a! m+ {( X

[ 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- l$ F+ O5 `1 Y9 a4 `
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 20 h6 A' B& d5 H t C
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.
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公仔箱論壇 u5 g. e9 m" u$ y5 y) Z& E% @
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 TVBNOW 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。# Q& q- N# O5 d2 g& z/ B1 w' l7 d! F
11x + 5y = 100 Formula 5

/ b6 f/ h* }$ C7 L E
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; R; |( }6 n7 J7 C% m
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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