公仔箱論壇 - Powered by Discuz! Board

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 C, ~7 I3 x7 h
規則
只何用100人搬100塊磚,不能多也不能小...
100人當中有男人、女人同細路仔
1個男人搬6塊磚5.39.217.76. A+ v# ]. @& a4 O$ [ @
1女人搬3塊磚
2個細路仔搬1塊磚
**************************************************************tvb now,tvbnow,bttvb0 _8 D3 ?% J1 E9 U- d2 z; X
問搬100塊磚
要幾多男人、女人同細路仔

答案30號公佈公仔箱論壇% z, A- f0 l W0 [! r0 q$ q+ D

[ 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.5.39.217.76$ n5 {* a7 u: u* k0 s5 F
Let x = Male, y = Female, z = Child3 i4 I- n/ b6 K% z, q/ s
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb0 w' p5 {7 V, [0 Z8 [) H
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45 s4 k | n9 C# \
Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb$ W0 a: P! p2 r, @# b
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.tvb now,tvbnow,bttvb+ i! I3 |9 u6 z
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,childrenTVBNOW 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。3 w; ?6 U4 w# l3 s8 W
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 5.39.217.767 v( a. s; S7 h% _" z
11x + 5y = 100 Formula 5

公仔箱論壇) V3 x) l) {' E8 c1 Z# W( O
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 公仔箱論壇- K3 j. F, Z3 c! k3 N+ b$ v
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

歡迎光臨公仔箱論壇 (http://5.39.217.76/)