[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( a* W' L8 C7 u" }6 a( c% H3 ?) h9 Z
規則
只何用100人搬100塊磚,不能多也不能小...公仔箱論壇0 ?: d. v$ K- G
100人當中有男人、女人同細路仔公仔箱論壇- R8 R2 c0 }9 D  |
1個男人搬6塊磚' C! c' L# d) L1 h+ f& u7 d6 G, v
1女人搬3塊磚
2個細路仔搬1塊磚
**************************************************************
問搬100塊磚tvb now,tvbnow,bttvb9 f8 q7 ~9 E" p4 \% r; H
要幾多男人、女人同細路仔5.39.217.77& L6 Z- g5 R5 |9 f" M
tvb now,tvbnow,bttvb8 D, H$ h5 F0 ^( a% b6 H
答案30號公佈5 ~$ `3 h; Q' ]5 z6 T/ @- h. P  y% g
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 w: \; l; K" W  h
[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]

收藏分享評分

回復引用

訂閱 TOP

twinsdragon

初級武將

Rank: 7 Rank: 7 Rank: 7

2^#

發表於 2007-10-13 05:40 PM | 只看該作者

That is a very simple mathematics question.5.39.217.77# \# d/ q9 b! G
Let x = Male, y = Female, z = Child5.39.217.77' G- z  A$ Z8 k6 C% N& @  L
6x + 3y + z/2 = 100 Formula 15.39.217.77+ w1 S1 R( E1 T$ E6 B, ?; V' O  c( J
x + y + z = 100 Formula 2* n& x4 [7 {8 e& t7 h- h" ~
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。1 d; F$ U* }/ ]0 H: Z: ~% S
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。- L3 ~( F3 O  i  S, h
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.1 ~: k( U3 ]# [2 m
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 = 80.6 L0 o- b. b  J7 Z5 Z0 Q" e
Eventually, the answer is 20 female and 80 children and no male.

回復引用

TOP

alan1234