[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: ^% ^. x8 L e7 }: }
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
1個男人搬6塊磚os.tvboxnow.com8 O4 T% `, J3 Q. e' h
1女人搬3塊磚
2個細路仔搬1塊磚os.tvboxnow.com5 j: e; Q) ?% [2 i
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問搬100塊磚公仔箱論壇/ ]+ f* |" Y0 Y/ E# J$ U6 L* }) i
要幾多男人、女人同細路仔os.tvboxnow.com/ w& s8 A% b8 }; N: H) l* f2 R

答案30號公佈

[ 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.
Let x = Male, y = Female, z = Child0 y7 c4 c- E' I4 n
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb+ M$ z( C. |! R( t# o% ?
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。7 |: R8 m2 `: F( Z2 [* ?
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 |1 `5 i8 X4 w
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。. B0 t& w: a0 |# v$ {
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.; x5 ]( }, ^! V+ Y- y$ _0 @$ V8 M+ q- n
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