[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

100人搬100塊磚6 |) K8 Z' \7 S. [5 ?% z
規則www2.tvboxnow.com6 B$ O& y, k2 b
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb  R! u# Z! n, Y+ H& n/ I
100人當中有男人、女人同細路仔# G. H3 D$ T7 x& V
1個男人搬6塊磚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。7 t' m' P4 z. ]: X  u5 }" ^. X. U
1女人搬3塊磚tvb now,tvbnow,bttvb( @4 [9 J; ~/ R4 ~$ [  W. A; P+ L
2個細路仔搬1塊磚www2.tvboxnow.com8 Y4 o2 J' R' Q6 b- |+ H
**************************************************************tvb now,tvbnow,bttvb6 x4 x+ c5 A, d5 j3 b$ A* f
問搬100塊磚
要幾多男人、女人同細路仔
4 \- l" h* F9 o7 ~# ]. ]0 [" n
答案30號公佈7 b9 L9 g! w+ x3 |7 Y- E$ v2 r
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。+ N/ c6 o% v8 v5 [+ w
[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]

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twinsdragon

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發表於 2007-10-13 05:40 PM | 只看該作者

That is a very simple mathematics question.
Let x = Male, y = Female, z = Child0 W( z' C( b/ E
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 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# j# L5 E$ B! z/ J4 I% K
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.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。3 ]: T8 W: Y2 j$ Q* K
Eventually, the answer is 20 female and 80 children and no male.

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alan1234