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
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* D5 J' R( ^. }『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)。, }" ~+ L# C/ h$ \7 b0 Z
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: , }; W2 F- e) l8 G$ N
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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1 b0 @# K7 @' w
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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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/ W0 n0 `! w: I4 v1 u5 }[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ e0 g' H9 F3 H
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,) ^% K) [0 j1 i( l
等我搵下仲在吾在8 V0 y, |$ Q& m/ ^1 u0 n/ y

) p2 _  ~' b5 u2 C當日用左37分鐘答１２粒波子，差７分鐘才合格。
" r5 T& A# v5 N13.........
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/ c' }% U3 ~2 f; ?! \5 M- N. A3 E[ 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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9 n, @# B1 `5 ?/ n我以前畫左個chart去答,
% C3 M1 F+ i  C1 A等我搵下...

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" a/ D' k3 A$ n' i9 W( e; k+ i4 M9 Z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:0 i# J) t! t' h5 X5 u' z: l) T
唔識隱藏...已經諗到..

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  K/ v) ]& {$ g# s; Y( Zsor !!!....e加改左
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5 E2 f# s& l: m* [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% z  R$ m# _/ j
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:; m; u# @8 w  T6 }
相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.$ a2 ]) X$ c$ L$ I; p- X" n
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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.
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Thanks

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3 `+ S: A& ~0 Q& H# R" B0 u/ ^* U不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
$ X9 e9 M* h$ |  T, aif 1-6 = 7-12     13 is fake0 m3 @1 I# g2 r- h8 M' s9 J; Z/ r+ F
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if not
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2 F/ |9 b4 c* RWeight the 2 time
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Suppose 1-6> 7-12" {! n3 A3 Q) B

+ O3 A/ _( x, J/ _* ?: h" k1-3 vs 4-6
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, ^) q- o9 d9 d( D' C( K; gThen Weight the Third& F- N2 M7 B3 y3 C. \' {- Z8 h
3.
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Suppose 4-6 > 1-3( U" W  X. U0 I

* P& Q6 V9 x$ F: M8 N2 GJust like the first Step
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$ f, I* |( y! Z% e8 ~  Y4 vs 5
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& u9 M+ u1 K6 Yif 4=5 6 is the fake one ! O1 V' i; D9 E2 c/ k5 ?: }

# e4 a$ y/ N( a2 sif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤9 D' i$ ?" ]! h! v1 m/ Z- ?0 E: ~

, ~; P" f" f" ]Group A: 1,2,3,4
# P1 S" }# \) I+ ]2 T% s+ @+ K( tGroup B: 5,6,7,8* t3 L3 _- J0 }1 T# h* k: J1 U6 J
Group C: 9,10,11,12% J" {/ Y$ N) Y0 J
Group D: 13
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6 M2 f$ \  l! ?4 O! \+ e5 j" cRound 1* ?0 G, T% B) Q9 [# b
Group A vs Group B2 C8 c/ I( i6 g) Q  i: S; f
如A and B一樣, 即較輕一粒在Group C or D5 D. t- K( t9 h4 I: ~

8 U: C) }8 f6 ]+ h; G/ vRound 2
8 ?! @. {  v; M: g9 X* P) [5 Q0 X再在Group C拆成:; m0 O* V! v% Z* J  T
Group Ca: 9,10
* Y5 O+ L; R+ n0 |5 d) nGroup Cb: 11,12
# i1 K+ E8 p% o( I$ p然後再秤, 如一樣, 即13為較輕一粒.
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: w: m. E* X( M2 T( x# q' p如不同, 即較輕一組有一粒較輕波子在其中, , V4 K2 O7 p2 f  E, W" k
要再秤, Round 3, 之後便知答案.
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! u# g  ]1 X* w, w( x" q* ze.g. #1 假設10為較輕的一粒
- ~6 s% [4 i  r3 oRound 15 w$ I( |- G" Q% o# e" h5 {# _
1,2,3,4 vs 5,6,7,8 = equal' z5 b. ?% T# a5 W% {: k% }

/ B& [) S% l- p: [6 p( YRound 2" }0 r, c6 M( H- [1 I
9,10 vs 11,12 = 9,10 < 11,12, u& @% O- A% x( d3 v
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Round 3% @7 y$ b% u+ r: c
9 vs 10 = 9 > 10
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8 c7 ?2 w: e. g, m: mThe answer is 10.
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e.g. #2 假設7為較輕的一粒: o- z+ H0 S2 H2 o
Round 12 l, \4 y6 O7 b3 f, s& E
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; Q2 |3 j. S5 k; s* I: D: d7 j8 P9 p

+ d8 v4 c! s( a5 PRound 24 u1 C8 ^* z, v! k8 }: I3 ~
5,6 vs 7,8 = 5,6 > 7,8+ F/ m& k4 x- A% N0 Q/ ]
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Round 3
  T. x. z# j! C) @7 vs 8 = 7 < 8. k9 u5 G5 L$ Q

( o& j9 P4 y8 B8 l0 t! w" |# SThe answer is 7.
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- U; V- W& c% O2 c- Fe.g. #3 假設13為較輕的一粒, `6 x/ C2 p; V5 d. l# x$ O
Round 11 Y, G8 F& Q0 ?
1,2,3,4 vs 5,6,7,8 = equal
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  @. Z) u0 c- k6 d: f" b, NRound 2
9 u- v4 R; n- F1 X9,10 vs 11,12 = equal
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No Round 3  k5 u' M1 g# l5 }, H: j) _8 R# V3 ^2 A
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The answer is 13." |7 O& e- d. b/ g% y% D$ s/ \
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唔知我答得正唔正確呢?!
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[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:! x1 ~" w2 [. d
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1-6 vs 7-12" h. r! b1 ^7 S. `, }+ s+ L
if 1-6 = 7-12     13 is fake, O* s; \* L; ?  V: s

6 x" c/ X* i3 A' s) |; Vif not
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Weight the 2 time
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Suppose 1-6> 7-12; _2 P# k+ B/ C* j* `0 N. X- Q
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3$ k. _" F. T5 n: {0 W' {/ \9 w

$ j$ P% g& Q, {0 V; T) uJust like the first Step) z. [8 N) V5 l
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4 vs 5
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7 q, Q$ d& Q0 @% v8 pif 4=5 6 is the fake one 7 L" k' K- ^* {' V0 ?5 s# l9 s! |

; r' E- C! i4 A8 }. @  ~5 eif 4>5  4 is the fake one
( k/ P* @# |" }7 N/ gand so on......................

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問題第二步
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Weight 1:  1-6> 7-12" [7 Q9 |+ R+ b7 L) H

+ o" J5 x" p% {, d: k# ]6 uWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6, A: ~8 ?. k! l9 r% ]

" S( |* H2 s  r4 F1 _0 L你第三步点去搵 7-12 边一粒???  a/ F( \& b$ b: F& D

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, O  Q6 {$ t- e8 d7 Q& o' g問題第三步9 f# L" E; p- [
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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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