[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塊磚公仔箱論壇# y$ b; {: e) E* C8 m& ~5 c# t6 Q
規則
只何用100人搬100塊磚,不能多也不能小...tvb now,tvbnow,bttvb; b2 l/ c. F+ ]
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
2個細路仔搬1塊磚0 F. C" C" p/ X% |' k0 R
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問搬100塊磚
要幾多男人、女人同細路仔5.39.217.762 U9 O& c9 {" W+ n% w: @- L! z
tvb now,tvbnow,bttvb9 H2 {4 \2 ^+ L" y5 y- Y
答案30號公佈
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。7 u* d% r) I& @
[ 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.5 R& a5 p) w7 E" U4 E+ u
Let x = Male, y = Female, z = Child. x+ C3 i: K( o4 E" V
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2( n) B# V+ T) T! I2 `
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, J/ D3 a6 y- x' q+ y5 k+ i. j
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。" @1 _( a- u9 k" t0 c3 L# k
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8 N* @' t# n: i5 |8 B; [
Eventually, the answer is 20 female and 80 children and no male.

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alan1234