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/ s  a- L. P6 p; M, Z6 X5 ^; {

( f  s$ e2 O$ _: 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)。
' O/ Z/ W/ L0 n, \" g! `- ~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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' z6 T/ F3 L4 f( }$ J0 d& M5 ]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 q5 {0 [2 s  [2 U$ t& K1 g: M; u
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
$ r& `9 m4 e1 V& M相信e條題目都有吾少人玩...

8 ~7 p3 m1 A* d/ }8 l0 |' h我以前畫左個chart去答,$ R$ T! r) E" P" N5 Y# O, A( ]" S
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。
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* f# c1 H: t" c. e# B. O: o[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:7 Z1 J& z" c) ?$ b8 k, m& I

) D: ^1 O) `: d) P0 x) f: L我以前畫左個chart去答,
; J! c' R, F( v* O* Z( p等我搵下...

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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:
; `/ H9 D4 ~! Y唔識隱藏...已經諗到..

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sor !!!....e加改左
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' p/ p( p# u" G1 m0 s2. 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0 T+ g8 L: J! Z% @% E, v

9 R5 y; S% P" M4 ?3 }2 _) W[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:$ L: S/ V2 u2 A2 o6 Z$ l, G0 {
相信e條題目都有吾少人玩...

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" g: F  ]9 ^. }7 K6 GPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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4 ^9 E7 U" F" w$ BThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: n: a: L9 v2 a/ U9 Q
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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% e3 l: J  Q' x2 ?+ HThanks

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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
6 x& h8 L- D" b  \% \1-6 vs 7-12
; H4 [4 P7 O" pif 1-6 = 7-12     13 is fake
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$ c" `$ r; d" z' lif not
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" \  t" f  D- k9 l) a: i9 ^0 xWeight the 2 time 2 {8 G1 u  y& F0 \+ w
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third& A% N& z: c/ }
3.1 {& {& A7 e0 o4 `

% T, j5 r/ S2 A8 kSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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: g' e3 |; Z* [7 Land so on......................

hello1997

分3組4隻波子秤
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) _3 @* ]- _; i$ l$ z' oGroup A: 1,2,3,4
5 _4 x# _) a) t5 L- wGroup B: 5,6,7,8
2 E0 \. X  t$ U: fGroup C: 9,10,11,12# o& H2 P. T+ j( O8 Y$ w
Group D: 139 N- y7 X' F/ D5 q6 m; c

/ W% I' K3 n( c5 n/ V7 q1 v6 y8 V1 BRound 1
% j/ p3 B5 k) a. g" vGroup A vs Group B
5 L! p3 C- |; G* m7 d如A and B一樣, 即較輕一粒在Group C or D
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5 z" o0 R- p+ m4 Z/ Q5 C% v0 pRound 2
3 W1 P, ~& |& e再在Group C拆成:2 P9 n$ t% X0 Z
Group Ca: 9,108 J. l* m' ~0 N- N- Q
Group Cb: 11,12; n  ?6 [6 f# b" L! y8 i
然後再秤, 如一樣, 即13為較輕一粒.5 A1 A3 \" S+ ]
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如不同, 即較輕一組有一粒較輕波子在其中,
8 v; ]6 L% V8 j) p' t* I. `) o  [1 T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
2 ~4 y5 [6 ^7 g5 sRound 1
, u; B+ h: _! m1,2,3,4 vs 5,6,7,8 = equal8 y) A" e. P! C- u

% {' D' u* S. {, Y! T2 g  r1 V! SRound 2
2 g3 A; m* }. ]7 O$ f) N9 n9,10 vs 11,12 = 9,10 < 11,12) U% {% Z$ x" c
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Round 3
8 K* s- E/ ]" b! @' q' ?. ?) S& o9 vs 10 = 9 > 10
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7 V4 f+ g7 S2 O+ ~( pThe answer is 10.! H0 Q$ L1 L6 z; t8 T- P1 K) e- X* F

3 u2 d2 @. H9 X$ V2 t( Me.g. #2 假設7為較輕的一粒  m) l4 s' l% D- X8 {# G
Round 1
& H7 W% g3 p' Z6 k1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. O& _6 p) u6 W3 N7 \6 h1 f

  ~% }$ [' t: q" y* k! x, @) ORound 2
% D9 R1 Q6 Q/ Q/ m5,6 vs 7,8 = 5,6 > 7,8  A1 i& x5 t5 m; i/ c- Y8 D
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Round 3
$ p' P/ w  J! z1 d7 vs 8 = 7 < 8
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# g1 T$ K  ^9 t' D, x2 {+ L7 a. oThe answer is 7.
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9 i$ k& m4 ~% Y; ye.g. #3 假設13為較輕的一粒8 t- n/ h0 _0 Q$ z1 x
Round 1
- c6 ?* X* ?4 ]% |1,2,3,4 vs 5,6,7,8 = equal
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/ L- @: V! A$ q% }6 H% hRound 2* b/ B# q! |( \8 M% j
9,10 vs 11,12 = equal
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No Round 3) N5 @; }* T0 S1 |8 V: |
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The answer is 13.2 w- y! p* u) @2 x/ D7 ^. O' x
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唔知我答得正唔正確呢?!
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2 V1 K% \2 W+ O[ 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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1-6 vs 7-12& B) o- U/ P" B0 d( g
if 1-6 = 7-12     13 is fake( {, w2 g2 K. Y8 f* |8 A* t4 ]

; X$ e* E+ J: Nif not
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  R  Q6 Q; j" L* S; K! \Weight the 2 time
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+ k' }2 X* X  A0 JSuppose 1-6> 7-12# _+ c6 x2 O3 F4 m( T7 B
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1-3 vs 4-6 ( Y, w( F3 V% u, A7 S

  l  @$ |; B9 UThen Weight the Third# o! U; E7 W% @2 e
3.
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! Q( h" U, L0 f5 I  _Suppose 4-6 > 1-3
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) y) w) F) K) m7 kJust like the first Step
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4 vs 5
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: e9 D) O8 `3 l9 U8 R, ]- qif 4=5 6 is the fake one
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, E) E# ?" a& q6 q) ]' s4 B( wif 4>5  4 is the fake one 2 Z# G3 u. D) _6 i- I
and so on......................

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問題第二步7 g, e2 U4 l7 C

0 h6 F) N# i% [1 ~Weight 1:  1-6> 7-12
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, E7 `$ C; ]6 r5 X4 |  x, z+ E& |+ O5 n3 WWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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  s& H6 U" x! ]0 z- {! F: P你第三步点去搵 7-12 边一粒???) w) B. ~& l0 x- B) g% o" P
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問題第三步
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! L6 R* Q- G5 ?" ~  PWeight 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