推理大挑戰(第四關)

playbr2

相信e條題目都有吾少人玩過,所以今次一於改難些少.....由12粒波子变成13 粒波子......不過對於識玩既朋友,應該都屬大同小異既啫- e2 |# Y# {( S+ Z! w
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『有 13 粒波子，有 12粒是重量相同的，有 1 粒是重量不同的 (沒有列明是輕了 / 重了)。; b! P1 T1 z, V& m
現准許使用 3 次天秤。請解釋怎樣才能找出 13 粒內那 1 粒重量不相等 (即是重了 / 輕了) 的波子呢？』
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注意:
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1. 回答題目時,波子的名稱代號請用使用 1,2,3,.......至13 等數目代表, 即1 代表1號波子 , 13 代表13號波子.....以方便查證8 G* P5 b# I* S  A$ \

6 i  A. L. Z1 J, y) n  `2. 請回答題目的朋友使用'' 反白功能 '' (即係將D字既颜色改為白色,白色颜色在黑色颜色上一行,透明的呢)穩藏回答答案,費事比其他人抄  , hide 字要連埋 , 內容 = 答案
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:* {; [% `% P6 V0 D
相信e條題目都有吾少人玩...

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我以前畫左個chart去答,- H8 \, F0 Z5 c  J8 _
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。5 H4 p2 c  l! M, w
13.........$ r& b) E1 P" U
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[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
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7 C0 Z0 H* w& g+ V$ Y我以前畫左個chart去答,* @0 D3 T, f; C; |9 J
等我搵下...

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& d- t: M2 O6 f" D: I記得穩藏答案

16749

唔識隱藏...已經諗到..

playbr2

Originally posted by 16749 at 2007-3-1 11:35 PM:
" w9 i: I9 ]- z6 \. |, @' ^唔識隱藏...已經諗到..

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% P/ c9 q5 Q: F% E( R, bsor !!!....e加改左! o% \0 }" y( {

! J7 e# L) w5 y. g6 G2. 請回答題目的朋友使用'' 反白功能 '' (即係將D字既颜色改為白色,白色颜色在黑色颜色上一行,透明的呢)穩藏回答答案,費事比其他人抄8 k8 g8 d# ~$ p$ R  _! [

) f* N1 O! m* u! |/ W* S[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
8 Y: c/ J8 O5 ^9 c# c, }相信e條題目都有吾少人玩...

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: O! Y% @- V; s: P5 QPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.* L  E# w6 L8 D7 F8 I& S2 X9 c8 [

& l5 D# l/ d: j5 x! K4 E+ I3 ^Thanks

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% Z& W$ U. j4 }* O" T0 F. F不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
$ ?" _+ ]% }& K8 t- m' p1-6 vs 7-12$ B# I1 v( z$ X7 }7 D& D
if 1-6 = 7-12     13 is fake' o" }+ N6 h5 t$ T- v' W% C

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; s! y9 `2 s( J+ q% CWeight the 2 time 5 Z  A$ S+ k9 r4 E0 t- ]
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Suppose 1-6> 7-12
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1-3 vs 4-6 ) `1 }1 @% P  G; {7 A& j* N

  k9 G6 P: W$ n3 JThen Weight the Third
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Suppose 4-6 > 1-3
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2 K% l) H- |5 |  |7 vJust like the first Step
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4 y8 w( |+ H* ~! E9 K: E4 vs 5 ' p' x# Z! Y. b2 {. Q) z3 I

% H# a8 x* g9 Z; c# Nif 4=5 6 is the fake one 3 z6 R* `- a* i8 u% Z$ g+ w/ M

/ ]8 [, B& B0 f' A: ?5 C, Xif 4>5  4 is the fake one * g4 _' l0 m8 U

2 A, j7 L" ?1 ~& D* `. c' }and so on......................

hello1997

分3組4隻波子秤0 v% E" }. ~) w' {3 x
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Group A: 1,2,3,4& a+ I% c5 w4 D2 ]* F
Group B: 5,6,7,8/ A, P9 g$ D1 s  U3 K
Group C: 9,10,11,12
6 o" p- J* A' j# ]Group D: 13& U, N3 U9 b5 p0 [
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Round 1
# ~) ~6 d( p; O# O3 M5 k/ M" j3 |Group A vs Group B0 T1 Q) m& k4 `% W; h
如A and B一樣, 即較輕一粒在Group C or D
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( P, g% ?6 X1 n3 E/ jRound 2+ _; T# \' t" x1 d% |7 m: Z( D, a" @# c
再在Group C拆成:0 S1 N: S0 Q0 s8 j/ Y9 `
Group Ca: 9,10
; Z3 R, l6 Y: J8 kGroup Cb: 11,12
* c9 P7 {9 ]6 t" g; J9 f0 F: s然後再秤, 如一樣, 即13為較輕一粒.
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; k, z4 A9 T; A$ [2 N' P如不同, 即較輕一組有一粒較輕波子在其中,
0 r% p4 F+ V/ [3 o) z要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
3 b9 n: B& N$ Y$ E8 `" H0 fRound 1/ V) I8 `$ `5 J3 Y
1,2,3,4 vs 5,6,7,8 = equal
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/ F, O7 S: _. p% M- _7 nRound 2: K5 ~" r3 l, h' b! o% [2 R
9,10 vs 11,12 = 9,10 < 11,125 f$ V0 ^% \7 x% x6 t
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Round 3
9 O* V- J. M& G: e2 |9 vs 10 = 9 > 10
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% X& e! L. j" W: D' P* uThe answer is 10.
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# ]: |- R* J1 Ce.g. #2 假設7為較輕的一粒
$ {( W+ A, |2 N! }1 j& s" YRound 1/ i7 S% `. U% T6 {& h0 O
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; U( S4 L1 H8 S8 L0 G/ z4 O. G, x+ d
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Round 2' r6 a& T, P0 L5 r3 G( e% C
5,6 vs 7,8 = 5,6 > 7,84 H6 D6 A  b+ I+ T

' m, \2 v9 [9 _8 |Round 3# q+ n- f  A# V5 y/ R8 l
7 vs 8 = 7 < 89 x2 [2 L" e! G

. |  E, r4 Q" |% K5 O9 Z0 LThe answer is 7.8 ]6 e4 R2 Z# ~
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e.g. #3 假設13為較輕的一粒
; v4 ?) j. S# s& F5 d2 O. kRound 1
: U3 X' L8 y" R; O: d1,2,3,4 vs 5,6,7,8 = equal
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# q* t  e6 J! K9 `1 r8 k3 r9 GRound 2
& M* _7 w% Q6 a1 }# J+ }6 E1 Z9,10 vs 11,12 = equal& A9 n  d9 d3 V, v5 z* D
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No Round 3
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7 h- |% |9 B7 }% Z( vThe answer is 13.' F$ w/ `/ w% ?
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唔知我答得正唔正確呢?!
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# i# J1 m" S" N' {4 _) \( C$ v[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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3 w0 h% }- E/ d* h1-6 vs 7-121 z$ G' Y: U; {
if 1-6 = 7-12     13 is fake
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if not ! G. W0 y9 O4 c0 _# ?9 c* o: u
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Weight the 2 time
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Suppose 1-6> 7-12
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Then Weight the Third/ ^' C4 s0 {# Z- X
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Suppose 4-6 > 1-3
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Just like the first Step# Y& v4 v- ^5 O  w' E% f

+ h3 b, W8 o9 c  P9 {9 w- X7 N  L4 vs 5 - k; `" v* w0 d$ t; y( s
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
( l2 b) w9 f( n1 }& n0 t9 B3 ?and so on......................

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問題第二步0 G7 J5 t( L* d1 i/ _; i
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Weight 1:  1-6> 7-127 @* s, `" e! w4 V" g$ j/ O! v) R

* T: I: u' C# N+ H8 A' U. AWeight 2:  1-3 vs 4-6 , if 1-3 = 4-62 T) r+ z. G3 H$ ~/ w: d( S9 \
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你第三步点去搵 7-12 边一粒???
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問題第三步. V, A& h3 ?2 V, a. k/ }( W
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Weight 1:  1-6> 7-12
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0 X4 b% Z7 E8 n8 rWeight 2:  4-6 > 1-3
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" K! z- G% X9 A0 M. r6 x你又吾知粒波子輕D定重D ..... 咁点解第三步只磅4-6 吾磅1-3 . 如果個波子係輕D ,咁4-6 就一定一樣咁重