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: {5 o2 A( j2 S. b4 ?  V. z% p7 N
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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)。
% N3 q0 V5 b% Y; s! P7 y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？』( _5 s+ `  b4 R3 ]; p5 b
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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  Y( m, X' E) b& _5 m
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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:) `. T+ U- s. ~6 L+ E0 p& o  Q
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,. z) ?8 t% y: D3 q! k
等我搵下仲在吾在
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1 a2 v2 d7 |. s% D當日用左37分鐘答１２粒波子，差７分鐘才合格。
% F: ]: a! \# n6 ^1 K& O13.........
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( b* u- J/ a9 U# X5 G6 N[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:: n1 |" `/ }# n2 o

/ Y( v% P" H# N. P" J' L我以前畫左個chart去答,$ G: z/ O' F1 S* R) k
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:
5 g& `; v3 Q% \- ^9 B6 R唔識隱藏...已經諗到..

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sor !!!....e加改左
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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
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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:
% A! r$ X( S1 a# ?  j! J/ _相信e條題目都有吾少人玩...

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% k/ k1 @2 b  zPlayPlay, 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:' a6 h: s" C$ s. v  Y

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4 y$ O, N3 q  e4 w) aPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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1 \/ G: g1 w" L& g: p" I  Y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& ^5 b% X$ B& o5 o4 h
if 1-6 = 7-12     13 is fake
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if not
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- n" O' m. G. R, H" r; LWeight the 2 time ( _* x+ m7 r% G! N' b9 Y+ A

3 U  C% O. {* jSuppose 1-6> 7-12
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  }' c8 a# C; _# x. }" R1-3 vs 4-6
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# k; y6 w4 B* Q' b" B* V/ @! [! iThen Weight the Third. e  q: r* h4 _2 W3 T8 @. l
3.
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* i- i- R4 o- y( TSuppose 4-6 > 1-3" U- D, G1 z* i
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Just like the first Step' v8 f2 v8 p" _

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if 4=5 6 is the fake one
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# r6 |: l4 u! F! d& Z7 v. z: bif 4>5  4 is the fake one 2 ^9 v3 {: W$ o. z) [
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and so on......................

hello1997

分3組4隻波子秤1 E% L4 w+ q; ~$ V6 W
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Group A: 1,2,3,43 Z9 m" z! W1 u3 T8 k/ U
Group B: 5,6,7,8# ^9 {2 {" {8 a$ \
Group C: 9,10,11,12
% Q! p1 H% |5 N$ cGroup D: 132 S; R7 m- [, x- ?3 A7 i  p
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Round 1, `1 u4 z6 W, C0 Q9 L  [" A
Group A vs Group B
8 S! P. k' c+ W如A and B一樣, 即較輕一粒在Group C or D. D! d& N4 {  e& V  K

. ?( r3 r' {6 Y, g$ j0 ^Round 2
$ Y  G$ R8 S  p2 q再在Group C拆成:
# J% Z! T3 j* u3 UGroup Ca: 9,108 V/ n( p2 p* f6 v1 j6 H3 J
Group Cb: 11,12
8 {1 ?, f0 ^8 ^" `3 Y/ x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,
  h( z4 e# d4 L4 V( Z( p要再秤, Round 3, 之後便知答案.
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1 I, z9 W' O# n/ o9 ge.g. #1 假設10為較輕的一粒
: w( |' {1 {( P+ b4 Y+ t$ {; ]5 BRound 1
9 |0 h& f9 S" ~2 w$ r2 t* U1,2,3,4 vs 5,6,7,8 = equal
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( G6 v! A1 @* _- kRound 2
* ^4 C: V. T0 l( K; o9,10 vs 11,12 = 9,10 < 11,12
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* ~4 Q; C( b: ?0 _7 BRound 32 X' z3 W" x% U
9 vs 10 = 9 > 10
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7 `. Z% {' T5 t1 @! U& EThe answer is 10.
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8 G0 `/ S6 s/ c& ~7 Ye.g. #2 假設7為較輕的一粒
6 X6 l  g% I; ?( o! p( TRound 1% C! |9 ?: @8 l
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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' W3 ]* }# v6 j$ ]  bRound 2" ~' k  r4 p) k6 N
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
8 Y9 E$ ~- i0 `7 vs 8 = 7 < 8  C) H' \! R( [- P7 U. i$ m1 z# ]4 L
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The answer is 7.
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- m' a  Z5 E/ |! e; ve.g. #3 假設13為較輕的一粒' I( ~) m' _2 w
Round 10 p+ b& l/ J; ]) Q6 L: @5 S
1,2,3,4 vs 5,6,7,8 = equal" s0 N* J3 Q* G

6 g+ l  I3 B+ Q! CRound 2
  G1 m+ G$ t" J$ T9 o9,10 vs 11,12 = equal6 O' N" K* p6 Q- y

  }! Q- ?: {0 L3 l! jNo Round 37 n/ B* l( f7 B' c; t) `

9 m3 R9 f+ Y+ i  n2 |" v% GThe answer is 13.
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唔知我答得正唔正確呢?! ) T" O  P( V6 A5 Q# M2 O% G8 n

. ^7 W, k# j! f( r. [0 Y7 S2 ^4 J3 D[ 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 7-129 t7 m# @$ E2 D9 c4 k. n
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time , n5 {5 ]: F0 N2 z# _

1 V$ S3 }; Q! }, s6 Q8 B# ^Suppose 1-6> 7-12
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* s; R1 P7 _9 Q# T1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-36 P) F9 i2 x% q4 U. J7 h
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Just like the first Step
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) {0 d/ e) `( p  G' B7 f+ l4 vs 5 8 M" e' J0 K0 E. Z$ F

7 @% G  X, Q6 dif 4=5 6 is the fake one
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if 4>5  4 is the fake one 9 u5 ?5 s6 C1 u2 [
and so on......................

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問題第二步$ ^1 g* q8 e7 a# f! W7 \
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Weight 1:  1-6> 7-124 U+ U: o+ ?/ h9 b5 E9 V! c' w

9 V  x4 `8 e  y/ z) l- L. ~Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6- [0 h  `* \! m( n; |- z
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你第三步点去搵 7-12 边一粒???  Y, d" a7 \3 t- A  S

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問題第三步9 K; s/ p& W# c. j" R; L$ A

8 O, n- B( U- NWeight 1:  1-6> 7-124 g! r% \8 Z# }7 Z- f2 s
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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