[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" z9 A6 ?, R, g/ U+ b
規則
只何用100人搬100塊磚,不能多也不能小...公仔箱論壇0 ]4 e6 o" `' d: D) A" r3 k/ k4 H
100人當中有男人、女人同細路仔0 r. @) p% ^9 y: }! B
1個男人搬6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。! }' U3 X3 r# A J8 e( Y
1女人搬3塊磚
2個細路仔搬1塊磚
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問搬100塊磚
要幾多男人、女人同細路仔
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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.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。) R) |4 P6 z8 U+ ^: P8 U' f
Let x = Male, y = Female, z = Child5.39.217.769 N; Y8 S5 Q1 l0 W* s
6x + 3y + z/2 = 100 Formula 1
x + y + z = 100 Formula 2
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb) k. @* G$ b6 G" T- {
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
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.765 Q- N2 y/ S c' n; d. J0 a
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。4 ]; o. U; t# f
Eventually, the answer is 20 female and 80 children and no male.

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alan1234