[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
規則
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb" F" n% X# u0 y4 }2 u
100人當中有男人、女人同細路仔tvb now,tvbnow,bttvb) _) X* g ]& {! @2 B
1個男人搬6塊磚
1女人搬3塊磚tvb now,tvbnow,bttvb* O* n* q4 g8 y7 f4 t; h
2個細路仔搬1塊磚tvb now,tvbnow,bttvb0 T, F% Y3 x' v
**************************************************************5.39.217.767 j! w3 A/ j- W, l! ]
問搬100塊磚
要幾多男人、女人同細路仔
tvb now,tvbnow,bttvb% _% g0 k. }% |) X; @
答案30號公佈
) Q- X: q) t: X# q
[ 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1 Y( n! x" J7 ~; @. a, G$ _
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2公仔箱論壇# e& l+ I$ z' v3 P
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 5TVBNOW 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。, T- L# o& g: X
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.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。- B! }# L- M/ L2 g
Eventually, the answer is 20 female and 80 children and no male.

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alan1234