[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' s3 p. o* p( r: [
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5.39.217.76& p" s" s) Q, i5 M2 x1 S- X
1個男人搬6塊磚
1女人搬3塊磚4 @4 q) V% h$ d$ v$ u6 @) {. v! J
2個細路仔搬1塊磚tvb now,tvbnow,bttvb' \. B- b: C" F
**************************************************************tvb now,tvbnow,bttvb" I" \5 U. b& N
問搬100塊磚
要幾多男人、女人同細路仔tvb now,tvbnow,bttvb* n2 B. x, m& [

答案30號公佈% M* C1 E, c h, G
公仔箱論壇" }' z3 C# A" {( Y- Z/ v- 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.tvb now,tvbnow,bttvb6 [; `2 h+ N- \) q. X8 s9 v ?
Let x = Male, y = Female, z = Child! B& T% a, `% {2 c$ D
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb" |# B* p2 h9 W1 ], y$ i
x + y + z = 100 Formula 25.39.217.76, A7 j# j! O p, p# R2 G8 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 4TVBNOW 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 R7 b1 p+ r& L: u' `9 ~
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.tvb now,tvbnow,bttvb6 B& `3 \' |/ p% |1 z+ M
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! i; j+ {4 T8 m5 I; o
Eventually, the answer is 20 female and 80 children and no male.

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alan1234