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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% w9 _+ q# d' @. G; o
) M& V2 C( Z& `8 fGroup A: 1,2,3,4
( z3 { G, {, LGroup B: 5,6,7,8: }" \: s) |- N, S
Group C: 9,10,11,12' J7 E2 s- ` O4 B
Group D: 13
( B, q; D7 E& b
x) x5 Q- o/ _1 uRound 1' f8 O: u6 B Y
Group A vs Group B. g) k+ [8 z1 f
如A and B一樣, 即較輕一粒在Group C or D3 i0 D1 [9 P) C; H v2 r
$ K: B% Z" t& f; W- ^Round 2
& [- M f5 T7 [4 n# v6 x0 n: \再在Group C拆成:
! p4 Q+ K3 E+ s9 Q. D9 pGroup Ca: 9,10
/ e/ I" E/ n }* `) L0 XGroup Cb: 11,12
7 {2 l3 ^ a2 p/ {, l; g然後再秤, 如一樣, 即13為較輕一粒.) y' C7 f8 N, D6 w5 |
2 ^" I* \) c8 V% P6 X' `
如不同, 即較輕一組有一粒較輕波子在其中, 2 b6 R& G1 w% t1 L# P0 C7 O2 x
要再秤, Round 3, 之後便知答案.
j" ]4 u3 E9 Z4 y, t' j) C4 y0 T2 k( t, O+ l! c6 G
e.g. #1 假設10為較輕的一粒2 A$ ]' e% h- A$ O" ]+ O2 b
Round 12 i7 L) Q3 s- i7 p! k/ b0 l1 Q
1,2,3,4 vs 5,6,7,8 = equal! i; v! J! [8 c0 @1 h
+ @* \: |1 x aRound 2
. k2 y+ J9 J v* _2 @' ]9,10 vs 11,12 = 9,10 < 11,12
- d3 ~' C* J4 O$ T4 `4 B" D' J+ D0 @9 e6 u( C
Round 3
5 @ y$ T% M$ {9 vs 10 = 9 > 10
6 ?" {/ Y Z( E/ x/ r3 Z4 O4 J! o& X. g; c8 R3 i j
The answer is 10.
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e.g. #2 假設7為較輕的一粒
$ u) a% `0 d2 fRound 11 ?7 g5 e( V% t. _- A) _2 k
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
: I5 J7 q7 \5 i% r/ z* G) v6 p: ^7 c# e/ D, |
Round 23 x7 ]7 K5 \3 m& Q g, G
5,6 vs 7,8 = 5,6 > 7,83 m( @, O" b0 b% K
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Round 3! a1 N6 B) w% O m2 w
7 vs 8 = 7 < 8
/ n6 c0 X" J7 i. l
8 L* W5 V! o' M! ^+ @# ]& W. _The answer is 7.
6 {3 S2 e2 Z% M7 ]& O
; m% e' D& B" z4 ?( Fe.g. #3 假設13為較輕的一粒, u# X9 w; N$ I% R) ^
Round 1
! |" z. Z4 U+ ^* A6 C1,2,3,4 vs 5,6,7,8 = equal. j+ h/ ?5 W7 E% A
" v+ L& `. y" V2 \% ?Round 2' A( S b, ~. m9 @( G: i3 A" P
9,10 vs 11,12 = equal* h4 W. b$ @" r" k% ~
7 h$ [ N ^' [: G" Y0 ]No Round 3
9 ?6 s! c/ X" T/ G c! u2 }2 z( u. A: E* `( l9 Y" S+ L
The answer is 13.) Z9 W t5 H5 \5 }* S+ t i
% [6 ~3 z6 l& l! N" ^. c, A
唔知我答得正唔正確呢?! 
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# y. D, b* e( q' D7 @[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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