100人搬100塊磚 ' F" u- E9 v P& s6 Z' M. l公仔箱論壇規則 ! T) a' H3 K" z+ X1 O( z2 D! |9 Vtvb now,tvbnow,bttvb只何用100人搬100塊磚,不能多也不能小...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 T+ Y2 T. i) S
100人當中有男人、女人同細路仔 $ ?4 _ e, c. e1個男人搬6塊磚 - b% B! {8 L3 p. f$ z7 O A1女人搬3塊磚5.39.217.772 ]9 b; ^" k* X
2個細路仔搬1塊磚5 X8 t/ G6 c! c- o2 ` e0 u
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問搬100塊磚 ! {) x( p! Y( q8 \2 _3 L公仔箱論壇要幾多男人、女人同細路仔 # c8 ?: g- c4 g/ |9 j |" O& \tvb now,tvbnow,bttvb公仔箱論壇7 Z9 ~1 O, u M
答案30號公佈 ! F* Z4 }; r8 W" U. y公仔箱論壇 3 ^: w: k% s0 ~[ 本帖最後由 1/5 於 2007-10-13 05:10 PM 編輯 ]作者: twinsdragon 時間: 2007-10-13 05:40 PM
That is a very simple mathematics question. 5 u8 W; N! `' A4 ~6 jLet x = Male, y = Female, z = Child : `) o( r" b& i1 R2 B. a% m6x + 3y + z/2 = 100 Formula 1公仔箱論壇- L3 k% b j9 i% a$ }
x + y + z = 100 Formula 2 8 e: }! M$ I. {+ k& PTVBNOW 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。Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 + N `1 w$ `+ [; N公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 8 h9 I. }' X0 G- _% ]% ZFormula 4 can change into 11x + 5y = 100 Formula 5 ! r5 t/ ^1 f. a1 E7 U) }tvb now,tvbnow,bttvbIn 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。& p; h g r1 i$ n3 n
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. , u9 U, C/ z5 t- Y7 U' LEventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers
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11X must be 0 or multiple of 5 ) J0 B& [: a9 H# F: c公仔箱論壇that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children % `/ u/ D7 _3 ]+ g, \公仔箱論壇5 male 公仔箱論壇- g {0 {% b" c. t
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
