100人搬100塊磚tvb now,tvbnow,bttvb+ s) r" ]+ E& J2 L+ ]2 @
規則 ' |3 o6 m* J2 ]! S: U& H" f% u5.39.217.76只何用100人搬100塊磚,不能多也不能小...5.39.217.76 O4 B. I* z) _. D
100人當中有男人、女人同細路仔 + a Q: L' ?, o7 p9 C5 U' T1個男人搬6塊磚 # h, V/ u6 c' t8 {1女人搬3塊磚 0 h5 d7 e9 d3 H2 w: n5.39.217.762個細路仔搬1塊磚 ; h' y, F7 O" @" a; _! m: N' 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。**************************************************************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。) T! M; L1 Y% L& k/ ^; c) i. D2 b
問搬100塊磚tvb now,tvbnow,bttvb& f0 G5 e \( q7 [& M
要幾多男人、女人同細路仔 8 |) m* s% W4 k; R) WTVBNOW 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 B# m! }( ^* i9 `
答案30號公佈 9 J- |* d0 ~) x' U2 ttvb now,tvbnow,bttvb5 \" i" p3 z; q v+ \2 U4 C
[ 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.5.39.217.76- U2 ]# C) ^7 p; e! ?" Q( ^
Let x = Male, y = Female, z = Child 7 ^, C5 J! b: d% X2 p9 Y8 Otvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 15 l2 s. S& F& M1 s# A) w
x + y + z = 100 Formula 2 : M' g! x& M( }3 Y9 N$ o( G( v$ aSimplify 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。* Q3 L- s. ]. K: o" |# b8 e
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb9 H0 o# a7 U% p. f
Formula 4 can change into 11x + 5y = 100 Formula 5 * N5 {7 ^+ K+ f+ lIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇5 g* g3 `. J/ C% b2 F# d+ ?- N6 t
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.$ R( ~2 b( Q* \5 P3 Y) Z
Eventually, 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
man,female,children $ J" b2 \5 F! m, K- u6 ktvb now,tvbnow,bttvb0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
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11X must be 0 or multiple of 5$ l/ N6 g1 V/ p# X- |
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
