[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7 L4 B. n4 Z& U* |% G
規則5.39.217.77% m. b/ h. K% o4 L
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tvb now,tvbnow,bttvb- d" B8 z% F/ Z4 Q; s7 e$ d
1個男人搬6塊磚tvb now,tvbnow,bttvb% A& B: @7 g/ z$ @: F0 V
1女人搬3塊磚. q" a: V$ v( c+ Q- `" V
2個細路仔搬1塊磚
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問搬100塊磚公仔箱論壇: Q y3 G& p5 ^% Q7 U
要幾多男人、女人同細路仔5.39.217.778 P6 b1 }% ^% j( W
$ }6 n" G& Q. _. I- E
答案30號公佈5.39.217.773 |5 H& w4 D( e" s/ X
8 f, c9 Q, X6 ^3 N
[ 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& H) c' @, T& Q; n
Let x = Male, y = Female, z = Child
6x + 3y + z/2 = 100 Formula 1% k7 u! X' d9 K: F' x
x + y + z = 100 Formula 22 d v2 F# t! L( L4 T
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3TVBNOW 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。' X6 V8 _3 f# \8 F' I
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb; F" i% [+ i5 Y9 e: ^7 d* Y
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.公仔箱論壇" z$ J: D- L! r9 a0 c5 y
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。2 u4 B) B% q1 V$ i2 P7 J$ E
Eventually, the answer is 20 female and 80 children and no male.

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alan1234