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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/ W* f+ _3 M( K0 Z
0 j# Y+ G# g5 S0 A; t5 N
Group A: 1,2,3,4, N: q0 R5 p1 _
Group B: 5,6,7,8& N: `4 J) H/ q0 V4 d
Group C: 9,10,11,12
, K& F- }! t- b; OGroup D: 13! x: e. j/ V" z6 U8 M
& ^- G3 p/ c6 p4 W" s. X# U
Round 1& @6 m5 p. u' [! p" r+ |6 H
Group A vs Group B, |( `8 r7 B- c( @9 R$ K! A' |
如A and B一樣, 即較輕一粒在Group C or D
9 R2 M* r9 X$ X; X* L$ R& z. o v& E3 v
Round 23 I* _+ K* p& \2 \, ]
再在Group C拆成:2 Q% S& |; @( X* D: o4 w' a
Group Ca: 9,10) W* T$ B3 _6 @7 R" [
Group Cb: 11,12, F- ?) K, S% c0 l4 t! E N8 |/ o' S$ C
然後再秤, 如一樣, 即13為較輕一粒. i. o3 g+ K: x9 C3 s
+ E& p! d& B% y" C6 q) K4 w
如不同, 即較輕一組有一粒較輕波子在其中, ; h, ]! A' L6 L: P; r
要再秤, Round 3, 之後便知答案.4 {5 c! H/ s( [9 p% r% z
" J" m, @% U- h/ m. k$ je.g. #1 假設10為較輕的一粒' H" i3 Q. U( S, Q' d2 V- i
Round 1. P8 F7 X# s' B: ^0 y0 B9 K
1,2,3,4 vs 5,6,7,8 = equal9 B) I$ O0 {% j3 \' {5 `! H# J3 s
$ G1 d% u/ W8 p4 Y4 k! ?$ O$ _0 PRound 26 w" d" V* E6 l+ m% B7 N
9,10 vs 11,12 = 9,10 < 11,12! O0 n. o/ E3 H
+ n1 V% V4 T( z5 rRound 33 e% ~6 u9 H' B) n4 g, Y1 \" O
9 vs 10 = 9 > 10
# t3 n3 Y' @; @2 a' `, B% e. r' h$ _& [+ M3 {5 g5 G7 T! W5 F) C% T* {
The answer is 10.9 {. F' p& z$ H3 Z
6 n9 L& L* |7 }; ]6 m4 \e.g. #2 假設7為較輕的一粒
. h, A9 l& T3 ?/ q7 i$ U' F+ BRound 1! d- Y9 D, J; O4 Z1 D. m
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ A/ M( ~* ^# F4 J1 n5 ~& |! s9 T
2 X7 y, ] U+ b* \0 D
Round 29 s: ~( s4 U R8 L: @
5,6 vs 7,8 = 5,6 > 7,8
, i+ y2 p$ }2 F4 ]& E, R3 N3 B- d" ]2 j1 Z( a
Round 3
8 F0 t# _8 D. P. R* q2 q/ K7 vs 8 = 7 < 83 `9 \. Z# u4 v; B
+ M. l4 H/ V: g& F0 YThe answer is 7.
( X! u' a8 s. f3 }
) P* C/ i; I( [+ J4 l) v" a3 [7 Ne.g. #3 假設13為較輕的一粒
" @1 _+ o$ Q, b6 {6 R' NRound 1% j5 w: [% P& [* F
1,2,3,4 vs 5,6,7,8 = equal2 S' Y% K& y- @; @# A
; Q: i, `/ ^8 F% GRound 20 D( K7 Z- y8 e& n: f# W# W0 B# i
9,10 vs 11,12 = equal" y$ R+ N& K% f' K6 v! q
6 k# X; P/ C" i4 g9 iNo Round 3& y' o: W }. Z2 E
" Z; p1 U$ O2 d
The answer is 13.. k+ Z, Y! A- g6 m) P& H
, f2 b* S: b% S2 k. X0 H唔知我答得正唔正確呢?! 3 ~6 T; ?& j+ c$ Y
$ @1 C v6 q" {& j c[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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