[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 R, \) y6 |2 ]% p# T
規則
只何用100人搬100塊磚,不能多也不能小...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。# Y( N/ r: W$ V; k2 X5 ?
100人當中有男人、女人同細路仔. ~- n) t1 U2 G8 a# F
1個男人搬6塊磚
1女人搬3塊磚tvb now,tvbnow,bttvb# X" o) K" J5 H& D8 `
2個細路仔搬1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。) K" d2 e# ^+ @% n. d+ t
**************************************************************公仔箱論壇- ?% e* K$ v4 g" h
問搬100塊磚
要幾多男人、女人同細路仔0 H. E" b; s( O8 A( B- u
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答案30號公佈* ]. f3 C9 p5 K" H4 W$ h9 N. s, C
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[ 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.公仔箱論壇! E, {4 l. b* i; s% a: I3 a/ z5 G
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2TVBNOW 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。' g+ M# q" e7 T0 y9 r9 U! i6 n
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3* e5 P- j# d/ ]
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45.39.217.77:88987 T; R8 k; L" [6 {$ ?4 Q7 q9 l
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.公仔箱論壇, U5 [* u+ A4 W5 j7 {' U$ P
Eventually, the answer is 20 female and 80 children and no male.

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alan1234