100人搬100塊磚 / I9 u; Y0 G" h' }, G規則! X7 Z# Y7 U, j% q* A, L2 |0 t
只何用100人搬100塊磚,不能多也不能小...公仔箱論壇( m3 A1 i- d& F `
100人當中有男人、女人同細路仔公仔箱論壇- p5 u3 t6 b9 |9 |8 ?
1個男人搬6塊磚# M `. P- o6 Z8 y1 E) U- f, b0 N O' I1 I' {
1女人搬3塊磚公仔箱論壇. j+ q" T! N* s
2個細路仔搬1塊磚 * l* l, z% U, b$ t**************************************************************# S" z3 M) i- B5 l# A5 S0 X
問搬100塊磚 7 b9 U' u1 a* g1 g5.39.217.77要幾多男人、女人同細路仔 9 P L' y, h6 \, n* {5.39.217.774 ?5 @1 M: ^( }3 y. N; F
答案30號公佈& ]4 l% g2 m6 _% ?( ^: }6 h6 D2 e
tvb now,tvbnow,bttvb$ V) M& K" y$ v7 p
[ 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. 8 H7 U! ]7 Y2 ? ]1 U7 W' kLet x = Male, y = Female, z = Child , V f: J( W; w公仔箱論壇6x + 3y + z/2 = 100 Formula 1 $ w# A+ c0 U M" M0 J9 N: Vtvb now,tvbnow,bttvbx + y + z = 100 Formula 20 h( W5 a9 Q9 w8 C0 r0 V3 \) \
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb7 j6 {& ?: q( S& Y* j Z
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 7 ?- p8 E3 {+ e0 MFormula 4 can change into 11x + 5y = 100 Formula 5 " B8 |! g3 l7 F2 i! R+ W, m公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. % s2 [+ N% x- V4 u3 a7 U5.39.217.77And 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. 3 |; u+ h9 ~7 ]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 - M. s& R. c" l4 l. [3 ~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。0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 6 P2 H g" P+ E' t公仔箱論壇11x + 5y = 100 Formula 5
" s7 u+ y" d, j$ T2 p+ @tvb now,tvbnow,bttvb11X must be 0 or multiple of 5 : B {0 O( ^2 Q+ F) \! o6 p+ T: Xtvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children + P, L$ W" s5 j9 f6 A4 R5 male 5.39.217.777 }7 r$ j7 k2 w
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
