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! ~+ l/ g* ~% w! H2 O$ |; 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)。
1 w4 U. j- E0 F4 o5 o7 L7 w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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3 |; S5 d) M8 f% h# Q注意:
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* [9 I; a: a3 {8 `  n2 d& W2 }$ @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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! Z& r+ q) U6 q$ x/ ^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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4 h: o" {$ H2 ~[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:& {) K2 z# _+ ?# w
相信e條題目都有吾少人玩...

9 [- j( g% i" Q" K# a我以前畫左個chart去答,
! W: A! e' T! J; F; N等我搵下仲在吾在- a* I: Z1 k- h

6 |* W( v6 r6 n) ?當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 v  r& q  A# I9 a13.........- L4 t) Y7 Q! L: D$ ~/ @- k
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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:* y# Z: ^$ {6 \- G) p
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我以前畫左個chart去答,3 L4 N9 H  K0 S+ F% p" I
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:
0 A+ a' K6 t( y7 `# Y唔識隱藏...已經諗到..

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sor !!!....e加改左
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: Q% K( }3 U! ?3 Y2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:* H3 x7 g7 f3 Z$ \( k
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.2 I8 r" G8 s  p  ]" u
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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." u- `) V# I0 [2 |8 m
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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.
  L; Y% y4 ?& k0 @1-6 vs 7-12
! @# [6 Z* F, ~+ O9 nif 1-6 = 7-12     13 is fake
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if not 6 |/ C: f+ r7 ?2 _% [2 y, w
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Weight the 2 time / h" D% }% i6 c& d2 l" i
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Suppose 1-6> 7-12
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1-3 vs 4-6 . ^3 H) l- b- f/ P& S+ h
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Then Weight the Third
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" ?& i8 H4 K" `) ^Suppose 4-6 > 1-3& M+ x: t. `) _% W6 u' p0 d6 e

; r/ A) J3 w7 O* uJust like the first Step4 m9 f& W6 c) N: G: M$ W% A

7 g- g! u$ s8 m9 L  D4 vs 5 * N$ `! T& L$ l( ]' Q& q

$ t7 ^% {- D- z/ @4 k$ Fif 4=5 6 is the fake one
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$ e' O9 @+ t7 H6 c' L# `6 ^0 Pif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤* j& q6 H% \, h! K9 B

: c3 |; p7 t1 Q5 M& q; Q9 Z; eGroup A: 1,2,3,4
2 r( M1 p. n" K5 Z  G4 dGroup B: 5,6,7,85 C$ q! o) @, r3 }+ s
Group C: 9,10,11,12- K6 f: x/ Y6 R, j
Group D: 13% m3 v' ]% O/ m

0 a1 S5 f+ K4 J6 x+ JRound 12 Y* ^+ E& p1 e% N2 F% T( k7 o
Group A vs Group B
8 A/ z7 u9 T0 f" p# Z" |* y2 E如A and B一樣, 即較輕一粒在Group C or D
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Round 2- l6 i1 M0 {/ f# O
再在Group C拆成:
, V# C% i8 T5 _' {: T- T/ bGroup Ca: 9,109 M& |& s3 z( P' r& K% `
Group Cb: 11,12
% g9 @; P& D( B6 M6 q1 j然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, ) c2 [+ }  c% h  E! }, |: o5 `
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 H9 O; C, }) }2 o4 KRound 19 M  X) `8 N' l% r
1,2,3,4 vs 5,6,7,8 = equal6 ]) x9 i2 Y1 @( O; x: F
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Round 2: G" ]) r( X2 N5 Z4 k: C
9,10 vs 11,12 = 9,10 < 11,12
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3 I+ J8 H0 @' o% W6 bRound 3% I/ S* Y+ v. \4 E8 ~
9 vs 10 = 9 > 10
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( B+ e" K, H8 H) ~8 @The answer is 10.
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e.g. #2 假設7為較輕的一粒* Z3 [2 e7 E4 C3 A' ?
Round 1
" i7 o6 a: O) m$ q" [4 Z1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
# J% U7 c) l2 x5,6 vs 7,8 = 5,6 > 7,8
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# \0 z9 M8 |0 a, B& m1 K- `2 G4 gRound 3
+ X( r3 M$ d2 G( W  {9 Q2 L7 vs 8 = 7 < 8
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& |  [- d% P* O+ [  mThe answer is 7.5 A. U$ k5 Q1 h, y
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e.g. #3 假設13為較輕的一粒+ ~: {- F' Q$ h: t8 C
Round 1
. u9 B+ x5 X  ]! D, [1,2,3,4 vs 5,6,7,8 = equal+ Q) L  E+ j' N# x

$ S+ h) J5 v. Z8 dRound 2: p# \2 D, l7 D  M; S2 _* h
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! # g+ a; }% U' g+ u+ G
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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:! z$ p5 l: h' P. @
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1-6 vs 7-12: d/ U5 n/ o* a* g
if 1-6 = 7-12     13 is fake: s' a" h" i# |+ X) ?
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if not 1 \( ?% M( s" l

- y) D* ?1 C  N& _, o8 B7 `Weight the 2 time
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Suppose 1-6> 7-12* P2 J. W" p# j& Y2 e" L
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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
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Just like the first Step
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4 vs 5 1 a5 ]/ P, W1 U) L! R
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if 4=5 6 is the fake one
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. t, u3 W8 {; t. k8 W1 H9 _if 4>5  4 is the fake one ; T) V: O; a. \$ r7 ?8 |7 Y
and so on......................

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問題第二步
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8 W+ M5 F8 G* x( bWeight 1:  1-6> 7-12
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. ?) W7 ?: u+ I5 ]9 P5 y, J6 cWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???6 B& ]/ F- V% ~  r) c
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問題第三步# a4 i  a. p# d$ ?

7 v6 [2 p7 c+ y3 p5 l9 qWeight 1:  1-6> 7-129 N, q2 J1 a/ r* y' M5 B
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Weight 2:  4-6 > 1-3
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2 t" C7 q. }8 S9 |: _6 _4 b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