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( h# @: Q+ J% F* q( B

6 V' j2 q/ c1 y4 v. Y+ Q『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)。
; u6 I% L4 u  }4 j: u- |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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# B8 k4 U2 N7 ]. a; L1. 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
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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 21:34:8 W5 R( `# N0 L0 d  t
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,
5 k. m% x/ _! B. M, |+ M, l  Y等我搵下仲在吾在$ [4 [. q! J9 {' ~: e9 D

4 @1 X' d- M) Q4 [2 g9 R6 t5 k# `當日用左37分鐘答１２粒波子，差７分鐘才合格。
6 E. m0 ^# x5 g/ }5 \" f$ |13.........
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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:$ u' y5 Z- x) _' N( [/ H! S3 z

  B0 \& Z9 A0 I+ @我以前畫左個chart去答,
1 u/ r. J( B5 y) D- w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:
& Z% G; U- E& r8 V8 [唔識隱藏...已經諗到..

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sor !!!....e加改左
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. A0 ^" L( ]% W' P$ 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, f* {8 P, u# Z& t7 t! Y' @0 Z
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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:+ f* h5 @4 K9 m! i& b
相信e條題目都有吾少人玩...

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2 m/ @. ~3 X( G$ V2 pPlayPlay, 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:- V8 _& N$ c4 Q/ X" B$ I- O4 F3 `/ l& }
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" P  r" V  D4 [; iPlayPlay, Let me know later who has the right answer and I will add points accordingly." ^0 M) s2 u4 G2 d
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Thanks

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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.  b' n4 J" g; _7 D+ |2 g
1-6 vs 7-12% m: L+ F8 x6 h
if 1-6 = 7-12     13 is fake
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if not 3 j9 p8 k* _0 A. w4 k* `; n

8 F5 z: N" q' YWeight the 2 time
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Suppose 1-6> 7-126 B- U3 |& m% t* u
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1-3 vs 4-6
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Then Weight the Third. t4 @; ]  w+ f# x4 {
3.
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3 G7 r/ h. A! h3 D: y$ s# kSuppose 4-6 > 1-3
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1 L7 T; A/ b" Y7 e# eJust like the first Step, a- {* Q# t/ V! P/ t+ @; ]; S

3 O$ {" n9 @6 F. w  {% p# E+ W4 vs 5 # j$ D0 i2 u+ n, ^. o* o
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if 4=5 6 is the fake one
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2 `/ S" t) S% u& v2 o; rif 4>5  4 is the fake one 7 O1 ?- z. I& Q& n- ^4 J/ @7 t
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and so on......................

hello1997

分3組4隻波子秤
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. g. ]$ Z: `4 E9 a3 ]Group A: 1,2,3,4
# L$ ~" H: N- l' vGroup B: 5,6,7,8
7 T9 T+ o) q" O) c- D: K% IGroup C: 9,10,11,124 L# h" U- C( w/ `
Group D: 13
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  }! g& Z" |! W# B7 y9 A( MRound 1: d- t4 O6 S! T3 k) O" U
Group A vs Group B
( B' }7 g3 N/ u4 b. T+ d. P2 W如A and B一樣, 即較輕一粒在Group C or D$ C# K; r0 i4 g1 H; Z

! g* c+ @( ^! [$ J* M9 Q1 mRound 28 E% a2 B8 V% z
再在Group C拆成:
) w, ~% X. D" H$ h2 f8 UGroup Ca: 9,10! y0 d) \% e( Z0 c! h
Group Cb: 11,12
1 {/ B: o+ t* ]1 C4 p6 M然後再秤, 如一樣, 即13為較輕一粒.& P2 D$ a/ k6 u, C

! ]% c0 ]: m+ @( K  q* a如不同, 即較輕一組有一粒較輕波子在其中,
$ t" B9 `0 b; m$ Y( u4 Z" z( ^要再秤, Round 3, 之後便知答案.
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5 h9 ^6 P) j- T! ve.g. #1 假設10為較輕的一粒, O/ b7 P7 X: C5 }; F3 c. }6 }
Round 17 T7 b. t4 H+ V% g9 Q  K% s6 L
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
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) |) Y5 m  e: y1 S& U4 @; jRound 3
. C/ ?6 i9 M1 z0 Z* ^9 vs 10 = 9 > 10
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- l" Q) W8 Z0 x4 f( D7 aThe answer is 10.
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e.g. #2 假設7為較輕的一粒
# p/ P4 r7 w5 a& G3 D; Q2 f3 m! xRound 1
9 D. O$ `% `; |7 C1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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" y3 J2 G! }% \  Q* TRound 26 y# F! u) }7 g, u. Z: M
5,6 vs 7,8 = 5,6 > 7,8
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5 `1 j( Q2 Q1 iRound 3. t2 [' C9 i: q5 p; u
7 vs 8 = 7 < 8# v3 P6 F( G, H& k
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The answer is 7.% V) K# T+ H/ U4 p  h5 k* D
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e.g. #3 假設13為較輕的一粒
  F# U6 {. G$ ]2 gRound 1
, M) x: P' y( D( |( j1,2,3,4 vs 5,6,7,8 = equal
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Round 2( E$ n: A8 X# e0 B
9,10 vs 11,12 = equal/ G( T1 A- r8 \$ b/ G2 T

$ o, a  \" q* J: y( y, JNo Round 3& s+ I: p7 e3 C6 @* f" F0 k; h
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The answer is 13.
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唔知我答得正唔正確呢?!
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: S  V1 k7 T6 y! z: z[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:) }3 L5 }3 i+ G# q- C1 [$ u. q' z" P
1.
8 v4 E. T" W0 p( y3 k$ o7 E1-6 vs 7-12: {. P5 o) v' o& f3 j
if 1-6 = 7-12     13 is fake
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if not % H9 t% b! S4 s5 q! h
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Weight the 2 time
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Suppose 1-6> 7-123 s1 [( G* u. a, f
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1-3 vs 4-6
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Then Weight the Third) }* v! F3 b5 p6 F6 x5 F
3.
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0 Z1 X+ d% E- B# ?4 C! nSuppose 4-6 > 1-3) I* N, B! X% G# @+ d
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Just like the first Step
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4 vs 5
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$ @; X+ e9 j5 Q7 U) `- b; zif 4=5 6 is the fake one 3 J/ c( _6 {2 F5 P

, G" }, d3 F/ i  Y4 x/ mif 4>5  4 is the fake one 5 @4 x4 i! e, J' V& b( s
and so on......................

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( |- K. P" k4 _7 [! k* X問題第二步( f( o! u$ h. ?! p8 o

1 F$ {; n! o: g9 e1 CWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ g( y+ J1 u; m8 i) ^; x5 Z你第三步点去搵 7-12 边一粒???
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========================================
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6 _6 i  ^& m) s1 ~& b) b: d問題第三步7 |; ~* f& ^6 L2 W- X
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Weight 1:  1-6> 7-12+ V% ^2 j+ ]) f

+ ?9 S) |; F) g1 p( h& r: XWeight 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