[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tvb now,tvbnow,bttvb4 [/ ]; o5 C& W  f% U* y
規則
只何用100人搬100塊磚,不能多也不能小...* `' H) {; w! V
100人當中有男人、女人同細路仔8 |6 ?4 E$ u& U9 _
1個男人搬6塊磚
1女人搬3塊磚tvb now,tvbnow,bttvb" y+ s( A: I8 ^) F
2個細路仔搬1塊磚
**************************************************************tvb now,tvbnow,bttvb8 ]+ O1 L/ l$ W5 ]) h
問搬100塊磚5.39.217.766 B' d% P6 \; j  i  X
要幾多男人、女人同細路仔

答案30號公佈0 z$ S" R5 [- A% A
5.39.217.76& k( _5 r1 _' ?+ f& H  J) w
[ 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.
Let x = Male, y = Female, z = Child公仔箱論壇4 f- @* \# F$ f5 ]
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 3
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4& m" }5 F0 r+ N4 ^; l
Formula 4 can change into 11x + 5y = 100 Formula 5/ w% R9 }8 x: h0 F7 S
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.765 y, F& P3 X2 G, B! {
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.

回復引用

TOP

alan1234