[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% r7 k; S0 x7 l3 z: z
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
1個男人搬6塊磚
1女人搬3塊磚* B e6 j! k$ {7 m' K( F& l/ V
2個細路仔搬1塊磚6 R8 d- J$ t2 l( Q0 e! |
**************************************************************5.39.217.76( }+ k6 }0 P. J7 N9 X3 m
問搬100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。. e* O& I# w" M' ^
要幾多男人、女人同細路仔5.39.217.76- O1 D& ~1 R0 O% x# I3 E+ z

答案30號公佈5.39.217.76/ J( Y/ p/ S/ m5 q" ^" p1 N/ ~; a
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。9 }6 I( c; ?6 }8 x( F) x& k
[ 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,bttvb7 a" Z$ d4 s# c( d
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 15.39.217.761 d* ]" P; i! X) W: i, {
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb- E4 e/ a9 f& u8 n2 o4 h9 i
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公仔箱論壇8 \8 ]0 Z, p: Q& ^1 u: x% @6 N
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.760 x h$ f3 b7 h
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.
Eventually, the answer is 20 female and 80 children and no male.

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alan1234