[IQ題] [數學題]100人搬100塊磚 ， 描述： 問要幾多男人、女人同細路仔

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100人搬100塊磚
, U" `7 `( j6 _( i% [. ~公仔箱論壇規則
5 s! f, g1 a' c" P+ {$ ]/ }# V7 \tvb now,tvbnow,bttvb只何用100人搬100塊磚,不能多也不能小...
2 V6 A8 r. s2 a公仔箱論壇100人當中有男人、女人同細路仔
+ m6 I/ N% S! P9 I* T0 U0 a. Jtvb now,tvbnow,bttvb1個男人搬6塊磚
: i8 p5 M+ n3 x* ?; C# wtvb now,tvbnow,bttvb1女人搬3塊磚tvb now,tvbnow,bttvb, h1 B/ V% |% Q( w& q7 a- i
2個細路仔搬1塊磚8 h$ E' x3 B2 B- M3 \9 V
**************************************************************6 s2 }1 R9 K& R7 E8 @! w3 X
問搬100塊磚
% O: U1 @( q+ x要幾多男人、女人同細路仔
' @* h% y3 x- q) \$ ]tvboxnow.com; t# j1 `, k/ q  v7 q& N; z
答案30號公佈
: d( M0 E4 n8 T+ Ttvb now,tvbnow,bttvb
% }4 @& b/ F7 {( D5 c* `tvb now,tvbnow,bttvb[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]

twinsdragon

That is a very simple mathematics question.tvboxnow.com. a. N# h# E! u5 w" p
Let x = Male, y = Female, z = Child
# R4 L% ?" z9 @$ J6 m; ?- ptvboxnow.com6x + 3y + z/2 = 100   Formula 1
* c3 x) j/ C6 F+ P4 I* }tvboxnow.comx + y + z = 100    Formula 2公仔箱論壇& B9 B/ b9 p5 a; K5 f
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
- b1 z- w. h' ~Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
* w( F6 u  p3 S) N5 }; n8 U- ?Formula 4 can change into 11x + 5y = 100 Formula 5
: b1 e0 `( C! utvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
8 e! X$ [' I) L# h& }+ SAnd 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 = 80.8 d) e5 P/ |& O9 y- ?
Eventually, the answer is 20 female and 80 children and no male.

alan1234

man,female,children
. D. y( C6 U& N0,20,80 or 5,9,86

RyanC

原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 tvb now,tvbnow,bttvb, F. H/ f; @( q( i( ]' X9 l
11x + 5y = 100 Formula 5

. D: I" x- Q, u( G公仔箱論壇11X must be 0 or multiple of 5
! a. y. G: N) i+ N* Ethat meanz x must be 0 or 5

manstein

86 children
4 {. z" ]: s; ^  x+ gtvboxnow.com5 male
0 [7 ]0 D+ p, I' c& T+ [6 p8 u1 V9 female

dafunhei123

数学问题，线性代数，我算算再说

dafunhei123

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

ghjleo

5,9,84

leou2830

想知道耶

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答案:  男人   女人   細路仔
9 S( a- P6 i% [          5        9       86

fristz

thx4sharing