[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tvb now,tvbnow,bttvb0 p1 o: J. W% J* r$ h
規則公仔箱論壇6 O, @! G, w+ y2 F
只何用100人搬100塊磚,不能多也不能小...9 F6 @% G3 \5 \% I* J
100人當中有男人、女人同細路仔
1個男人搬6塊磚8 m2 E- T2 B' A; _8 a$ ~3 S/ `
1女人搬3塊磚
2個細路仔搬1塊磚, C+ q; ^, N7 z, b
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問搬100塊磚tvb now,tvbnow,bttvb d& l9 o0 D$ k6 g' V3 N8 S0 C
要幾多男人、女人同細路仔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。0 R$ l4 O2 T8 {$ l" ^; t
tvb now,tvbnow,bttvb+ D I) k. Q" d4 N; ]6 V8 K6 X
答案30號公佈tvb now,tvbnow,bttvb; U" N9 C( A1 i! c5 p: J- m! A' j

[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]

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twinsdragon

初級武將

Rank: 7 Rank: 7 Rank: 7

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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.tvb now,tvbnow,bttvb) S+ w4 E, j- G7 S5 w1 ^
Let x = Male, y = Female, z = Child% m5 {* }7 X4 o
6x + 3y + z/2 = 100 Formula 1公仔箱論壇7 u3 J) z& f. D8 R+ F/ ?
x + y + z = 100 Formula 2公仔箱論壇, H# ]+ J G2 T
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 = 80.6 `5 E6 J2 k1 a. i1 ]
Eventually, the answer is 20 female and 80 children and no male.

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alan1234

浪人

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發表於 2007-10-14 12:19 AM | 只看該作者

two answers

man,female,children
0,20,80 or 5,9,86

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RyanC

原始人

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發表於 2007-10-14 10:46 PM | 只看該作者

原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 5.39.217.77:88989 ^7 O) e/ ?# z8 x/ k2 a
11x + 5y = 100 Formula 5

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。2 a7 C; f+ W3 n! V
11X must be 0 or multiple of 55.39.217.77:8898" |' X# h) j# a% Y6 K5 X
that meanz x must be 0 or 5

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manstein