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發表於 2007-3-2 12:35 AM
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分3組4隻波子秤) R( S9 o3 M- d1 M( `
+ @7 z0 U7 x# X% r# w* a7 V9 wGroup A: 1,2,3,46 n7 B7 n& I' A/ S( a' i/ Z
Group B: 5,6,7,8
5 m; {9 [6 _3 m$ u, X4 X P; X3 @# z7 f! OGroup C: 9,10,11,125 `- K ]' Y0 @
Group D: 13
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Round 1
" J. B, |. Y# X, GGroup A vs Group B; }1 w- J, h* W. @! o
如A and B一樣, 即較輕一粒在Group C or D0 X4 \( H7 b# u: @5 b& |' e& \
( p+ F/ j/ y' j# V$ t# d" YRound 2. B2 b) d0 X6 N0 N
再在Group C拆成:) o' ^; U! x* o; @! x
Group Ca: 9,10
" b6 j* L" \. T2 m- u) ?& I6 GGroup Cb: 11,12
) R7 n/ [5 J) M- D: H然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, 4 ?) L4 W+ ?/ Q7 j/ U" y' P6 D
要再秤, Round 3, 之後便知答案.; @& ~4 g# b5 O+ F, T
; b# e" U, N) K0 r/ V; l) U
e.g. #1 假設10為較輕的一粒3 g( J" Y: C( a4 u+ M% o [3 ?
Round 10 M# |: t7 Q4 |7 D, S
1,2,3,4 vs 5,6,7,8 = equal
% U$ j5 K* N, N+ l
! ^' v v+ U0 t& S. e9 _3 oRound 2
; M r+ y$ |4 V! R9,10 vs 11,12 = 9,10 < 11,12
8 D- t, d3 I `) C. s2 l
. ^8 H8 o9 Q4 g! h# F' T c$ [) BRound 3
" D+ D# O$ Z3 _$ o& w+ T8 M9 vs 10 = 9 > 10
3 Z' c {7 z* q; N1 ~' l
$ B: L- D# s' v iThe answer is 10.
. M ^& N, v2 n9 l% @/ r6 h1 q9 W# ? n& z' @2 e0 y0 m
e.g. #2 假設7為較輕的一粒
+ N) ^% l" \7 X2 c4 S0 pRound 18 J- U6 U' L; d4 Q1 {' ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
% s; b9 b7 `5 k
6 X. ~, {6 |8 l$ D! X2 k9 u4 W3 MRound 29 a9 i& v8 O4 B# m" H; u& q
5,6 vs 7,8 = 5,6 > 7,88 u$ ^8 ^5 G3 k N) H! T7 l
$ o. l, N* w/ j/ s C
Round 3: i+ O+ i: c4 Z8 `
7 vs 8 = 7 < 8$ k- C1 m1 _; X& N! O. C2 k
) k6 O/ l! y! a% F/ I0 m. {
The answer is 7.
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e.g. #3 假設13為較輕的一粒" i" p* b& X$ F G! `
Round 1
5 _, o+ J' K- m; p4 \% z1,2,3,4 vs 5,6,7,8 = equal
1 g( @& q+ Z( @) b# T% i% X$ P' {( W& o9 O9 J, m; G
Round 2/ t6 M1 S' d) M: V
9,10 vs 11,12 = equal
& l4 V1 K1 P0 V! z; Z( f- w; e7 m7 p4 v' W. W/ b1 l
No Round 35 g! ?' m% B* N S0 ~" S
( q: w- m, |3 i: N% Z7 L$ wThe answer is 13.
# Z% ?' Z& n" J2 i6 B- ?; }9 C2 E7 @. X+ [
唔知我答得正唔正確呢?! 
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6 ^" v% ?/ l c- {: r/ Z. |[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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