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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/ V. m* q$ t* F6 G' R
規則
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb' _% C$ i0 X5 X( m. @! A1 x
100人當中有男人、女人同細路仔www1.tvboxnow.com2 F. s! r$ f* k p9 s
1個男人搬6塊磚
1女人搬3塊磚
2個細路仔搬1塊磚tvb now,tvbnow,bttvb) n9 ]' ~# R0 w) j! w0 i7 t
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問搬100塊磚' p) l% w, c* D* U. I7 Y6 w
要幾多男人、女人同細路仔www1.tvboxnow.com4 F" |, t% T; b! _1 C$ _ h+ t

答案30號公佈
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。6 s8 L. _2 _+ ?1 c4 @7 m5 ^9 s, C
[ 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 = Childwww1.tvboxnow.com$ c9 n. B( u: S
6x + 3y + z/2 = 100 Formula 1公仔箱論壇 s' Z8 z) C) U' f4 h
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3www1.tvboxnow.com; B' r( Y7 G2 J% n) o
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.3 d. b8 X5 \2 V; f: y1 i! ]6 l
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- e5 N, _7 j+ Z- X' c! }3 `0 k
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
) \/ u' T0 v; k7 vwww1.tvboxnow.com11x + 5y = 100 Formula 5

tvb now,tvbnow,bttvb. h, s& O- }$ b5 i2 F/ w$ p" r j! R& p
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
5 9 86

作者: fristz 時間: 2007-12-6 10:09 PM

thx4sharing

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