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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4 K7 B4 e" X' I9 S
- C7 M9 N' o0 k% y9 o" h
Group A: 1,2,3,45 g8 o0 S; c- _, ^6 i) |
Group B: 5,6,7,8
7 G; g9 |, h8 r; rGroup C: 9,10,11,129 q+ x' q4 d) V ]- o8 O. [5 Z7 G
Group D: 13
- Q7 V( l; G- o s6 T; ~* D, Q, V, x( l/ k' n
Round 1
; H* b9 C+ a _8 {, ?Group A vs Group B6 t6 [/ h0 W" n$ v- C: c
如A and B一樣, 即較輕一粒在Group C or D0 n% b4 g/ O# R! _; C ^# F
8 \; T* W2 m R5 uRound 2/ d: S5 a p/ w3 u" [$ B
再在Group C拆成:; L, E3 x- t# p( s: {& i+ i
Group Ca: 9,109 C+ m9 w2 x/ [: i- @: E$ l
Group Cb: 11,12
, G7 k/ {" c8 _4 G& p- ~# ^) W然後再秤, 如一樣, 即13為較輕一粒.
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7 D9 X1 ^6 P) a1 ]! N* f如不同, 即較輕一組有一粒較輕波子在其中,
. `. |: l4 f* @% D要再秤, Round 3, 之後便知答案.2 \( n" {- j( N3 U
C3 T4 I, h( a& ]6 De.g. #1 假設10為較輕的一粒
) m+ q3 l5 w% L3 l* zRound 1
% [1 R8 k& U+ I; P0 u. w/ Q1,2,3,4 vs 5,6,7,8 = equal k+ d( Q3 ^# C1 \3 {0 k6 [8 @
: S+ s2 y5 {9 D2 Q" n# vRound 2
! Z! G2 E+ L0 S1 F, K9,10 vs 11,12 = 9,10 < 11,12
! A8 N3 T/ T# P2 C0 i& d; e/ d% }6 _: D X5 q" I0 ?% u: f' {0 [
Round 3/ `* h" |) ]5 P3 G, h0 d
9 vs 10 = 9 > 10& V/ k# {3 b3 X" ?
3 ?% V5 `) K3 l9 l
The answer is 10.
/ m" d J6 C; c2 _& C9 r/ }
% W1 \. b( I/ i; y* ^, re.g. #2 假設7為較輕的一粒: @% X$ J, h" u g
Round 1% J/ p8 `5 ~2 C; f7 ]; x2 F4 ~% O& g* \
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
4 {+ A8 n: k( a( } O* U! c
2 B0 D* [8 P) v0 f# s" e7 F# g, jRound 2
. ]3 Z5 n) ~ t; c# E8 D5,6 vs 7,8 = 5,6 > 7,89 o6 I' O) \' R% ]
j% S/ h3 L% B; {% j( cRound 3' ]6 ]9 @2 }9 N. y6 `# ]! |
7 vs 8 = 7 < 8
; a) I, D4 n% g$ ^* Z+ R: a% ^: {) O9 ]2 q& J" g- m
The answer is 7.
' M1 {& U3 M4 Q+ X9 u6 L6 `+ B M2 B% i, @
e.g. #3 假設13為較輕的一粒. q/ Y3 H+ R! Z
Round 15 W9 e* e- ^' y, C/ P8 Y
1,2,3,4 vs 5,6,7,8 = equal, ?5 u; L9 W* r9 s4 u! B7 M
5 h. x5 g4 Y& e4 K, {
Round 2: v! L9 K: N- h! \( P# N2 i
9,10 vs 11,12 = equal* l r8 h1 {; t* D) _
. D! k: ~( X5 T9 N
No Round 3
3 N+ F+ j+ k- A; z" F" g$ h: I1 m6 J1 U' B3 e2 b; r& [( B
The answer is 13.
9 ?: o0 \4 b6 K+ T% w7 a2 ?& K4 W) G9 K' i; S l4 t
唔知我答得正唔正確呢?! 
6 O8 a) e# u" J/ n) N+ y! }- [8 P- _' h. S& X
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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