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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4 ~! |+ ^! E2 P9 q1 ^  ]& 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)。/ u. U$ ^0 A& Q) }
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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& x; {  `% b9 p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
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( E6 E! @# y8 a8 i% x6 D: |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1 e( K( P$ a9 S6 }# z; e, p( e

  q' q" q1 F/ b+ t+ _* Q[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
3 k' p/ X# J: Q% C9 w$ e  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,9 e+ H" {. h% c" r" D1 ?+ R
等我搵下仲在吾在9 u  Q; X/ M. O% a2 T

9 \8 h4 p# l7 Y& |# b  x當日用左37分鐘答１２粒波子，差７分鐘才合格。
' N; I4 `* o" ]$ ]+ ^1 g$ M13.........
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. @$ {& {  F: M3 ^' U0 ?* w! s; s[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:6 w: N! O4 ?: o2 P
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我以前畫左個chart去答,
3 W6 ^' k# {& Z! Z$ z# I  j8 |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:
1 B5 K0 l2 O5 ]+ E: y' V" S. S9 }唔識隱藏...已經諗到..

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( X6 j9 b2 w5 |4 @8 L3 Z: Ssor !!!....e加改左
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. \* ]4 v4 \5 i9 I0 O: n- r3 O2. 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
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' i, a2 A5 I' z! C+ w  n[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' O+ p% y' u' M
相信e條題目都有吾少人玩...

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$ Y* g. Q% o; A. A6 @! GPlayPlay, 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.
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) `3 u1 c/ i5 Y! u9 c# }9 K5 T, IThanks

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2 U/ T. N, a/ k* o1 g6 ^4 d. ^8 O! l$ x不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
9 S! z/ O5 I, Y6 K, I' ~+ t1-6 vs 7-12
1 [) c9 H1 D6 T. F5 vif 1-6 = 7-12     13 is fake$ M2 P  W: k7 t/ t% F/ }" O7 M

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, s9 y+ f) h1 v- _8 r) r" `Weight the 2 time . z- V& A( u5 c+ G: q# \
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Suppose 1-6> 7-12% t/ t. s3 r2 ?) K% r% ]0 s2 Q
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1-3 vs 4-6 # g- C0 N& e, D5 F4 Q5 {3 Y; L6 u5 A

3 V2 s4 o2 X4 UThen Weight the Third
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/ J& H$ k1 T7 a- WSuppose 4-6 > 1-3
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Just like the first Step3 Z  e8 a3 g! B/ y5 D
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4 vs 5
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if 4=5 6 is the fake one % G& J! ]' Y  d8 X
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if 4>5  4 is the fake one . s, i, {- l3 Y7 w4 M2 ~4 `

; w0 g+ T5 a, K5 I% P( D+ sand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
* v* k; W! e+ L' @# C9 dGroup B: 5,6,7,8
5 Q' }9 \- a) M. O$ V; D7 e0 mGroup C: 9,10,11,12& f. i! b" n# s& m& r# l) Z
Group D: 13
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Round 1
* B' H' d! C! ~& A* t" s# Y3 pGroup A vs Group B
1 U$ P& O, P6 b1 q8 Z+ c如A and B一樣, 即較輕一粒在Group C or D' ?1 z3 R- d! t8 E+ ~
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Round 2
- G5 t( P' W9 Z; V" A" \" l再在Group C拆成:! Z# q4 i, ?5 J
Group Ca: 9,10% g$ K* ?; p8 X& R& R- v+ F4 M  [
Group Cb: 11,12) H" F- u2 Y5 e8 U$ j' F
然後再秤, 如一樣, 即13為較輕一粒.8 Q1 Z( ]+ `$ }6 b6 s
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如不同, 即較輕一組有一粒較輕波子在其中, 8 U! D' R) c8 H& D1 i
要再秤, Round 3, 之後便知答案.4 A% c3 z# j( \1 c4 r
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e.g. #1 假設10為較輕的一粒) [6 G  W& |- ?- [
Round 1
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Round 2
) J( x7 b; o2 l8 ?% A9,10 vs 11,12 = 9,10 < 11,12
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Round 3
' O+ Y7 x6 r& ?" a8 A# H) O9 S" H( O9 vs 10 = 9 > 10& ~8 `8 S' A( W+ V( s) p

6 i2 K+ b9 \1 V: C7 _; sThe answer is 10.' U& a2 m+ r9 ~8 h
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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2 [5 }0 v+ j+ D% z. b4 a5 D2 y% ~: _9 RRound 25 y: I3 M7 M, ^5 x
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
& D, e7 z8 d+ O8 [# @2 L; E7 vs 8 = 7 < 8
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' k( U9 C5 B0 v) Y9 h8 j4 t* C4 ~The answer is 7." }. M( d  W, r- Z% l3 `

4 i; y% I) g  H/ Z, O8 fe.g. #3 假設13為較輕的一粒
7 r! E9 S! h. w8 T! |; o5 \+ SRound 1: k9 m$ |8 F9 l5 g5 y3 y# Q
1,2,3,4 vs 5,6,7,8 = equal
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! p$ q$ k! z4 URound 2
1 V. t% ?% o: a) _  y* Y$ ?9,10 vs 11,12 = equal* ?; B$ }. U  p: y5 `

; P$ }/ Z: x  Z4 KNo Round 3
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The answer is 13.
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. s8 m$ U( K, ]# N唔知我答得正唔正確呢?!
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' v. E6 o7 y( A5 t% ?[ 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 7-120 P- p& S- Y9 p) t; I7 s: s# O
if 1-6 = 7-12     13 is fake
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Weight the 2 time ! j0 z1 b) y4 H, ?; \0 f
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Suppose 1-6> 7-12
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1-3 vs 4-6 ! T( o" M+ o1 h; C

/ A, J. T) G. ZThen Weight the Third
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- e8 q* b  b- ~9 aSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 ' C$ S4 w: f! d, [
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if 4=5 6 is the fake one 6 U( e9 c+ p' T& i% G% ~

5 R# `' S' w  n+ d* w9 gif 4>5  4 is the fake one
0 n( I" H" U% Eand so on......................

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9 `6 P7 U* D/ |' n# A4 v/ [8 |問題第二步* Q6 O# _% O6 ?, w
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Weight 1:  1-6> 7-123 K, k$ F2 B/ p# V0 \! P+ C. p
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-68 |. w+ R" b5 ~7 x3 p/ D

2 k( v3 p) E) x% @6 [) w  @你第三步点去搵 7-12 边一粒???# D( _: l* ?( H% C! L- Q' W/ b
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問題第三步
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Weight 1:  1-6> 7-12
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: p0 E& l) w6 _5 Z4 aWeight 2:  4-6 > 1-3 # Y' p; ?; X: K8 E4 p9 D
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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