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- C0 @  k) @( v
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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)。( d1 u$ `4 M8 v6 n- S( L; Z
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？』) w1 Q4 X* z& ]! @2 J' x

& A/ f$ D2 S& `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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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:( ~& L8 h) B0 b3 G$ e
相信e條題目都有吾少人玩...

: F  |6 C1 M7 @+ V* Y我以前畫左個chart去答,& C  @, k' U4 L! m" W9 \
等我搵下仲在吾在
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4 ^0 A& ~3 p; O4 ?1 }7 k, z  {當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 n/ F4 f( g5 y7 B8 M13.........  H: X- A. ~9 u' ^% U
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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:- c8 k: [8 i# A

7 L2 L. @+ V' N- m, J+ N9 D( Q5 U' i我以前畫左個chart去答,
& _) I- M  A& E) D! h/ y等我搵下...

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2 X5 J% S7 q7 r: `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:& m5 n% Y5 B' S) P* u5 {9 ~  F4 m% a
唔識隱藏...已經諗到..

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, j! J+ c* T6 f% `, }' Vsor !!!....e加改左) W& o( `; }0 M; a0 V5 A. Z$ R

; v7 e8 K. t! J/ a4 l2. 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: I+ d1 L9 a. X* x7 J
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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:
5 R' S9 ^: f  k+ V$ h& J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.
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2 E& U" ~* O2 W* X  {Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 e5 [4 E0 k( y
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. G. r# e! h/ T7 oPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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# A+ r8 y, I  @* e# E0 W: [5 K0 DThanks

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4 J6 f9 Z: v: `2 B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 7-122 ]# D" @& Z4 S" H. _
if 1-6 = 7-12     13 is fake
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if not
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8 S4 \3 J' Q" ]  {Weight the 2 time
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Suppose 1-6> 7-12
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( M4 x6 e& k3 C9 O  K/ d: D1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3, E0 c9 ~) L8 |# M; w+ {9 s
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Just like the first Step1 J' I* B8 {- ]2 s' R& B8 D
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4 vs 5
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if 4=5 6 is the fake one 5 {5 R! u5 O' K9 ?
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if 4>5  4 is the fake one 8 e: D% y6 i  G& O2 h
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and so on......................

hello1997

分3組4隻波子秤! _! ?4 i" {* F& L5 p! r
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Group A: 1,2,3,42 t6 F( d+ U; J! G, U& B1 X3 i
Group B: 5,6,7,8# Q; E0 J5 r/ `. B
Group C: 9,10,11,12
" N/ h( h" m' t) E& ?+ O) |3 ^Group D: 13
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Round 14 U1 @3 O$ I5 p$ G* K! @3 d& y
Group A vs Group B. D% v7 K& L( F5 {  }* D
如A and B一樣, 即較輕一粒在Group C or D
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. O, ^" O7 U- O- L3 O8 mRound 2
, c7 p6 B, U& |5 e- @" u0 B再在Group C拆成:
$ C0 Y7 m& x# N8 a4 f. @Group Ca: 9,10
3 J3 U  e8 `4 X' Y: c) tGroup Cb: 11,12
0 n& r0 B( Y  z: a. H) M1 ^然後再秤, 如一樣, 即13為較輕一粒.
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# b# m1 U! L2 ^  t& m: o如不同, 即較輕一組有一粒較輕波子在其中,
4 \! W( t: I+ O2 I' _' K. `1 a4 e要再秤, Round 3, 之後便知答案.; l3 @; Z( K1 a- M

# s7 r' s* S7 o/ l) d2 i1 W, ee.g. #1 假設10為較輕的一粒$ m( A+ p5 @8 @  b% O7 X
Round 1% o$ U$ e% r- n$ l6 Q6 @
1,2,3,4 vs 5,6,7,8 = equal8 `4 k2 u. d+ E: @- n: k
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Round 2/ f2 e* i  k3 s( o
9,10 vs 11,12 = 9,10 < 11,12
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$ f: q* C0 M7 `1 ?9 `* u9 gRound 34 H1 Y" ?) v2 Q0 ~
9 vs 10 = 9 > 10% K8 |9 |! y; S, J1 j" d% g
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The answer is 10.
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e.g. #2 假設7為較輕的一粒( l' d2 B; e0 ?4 o' n
Round 1
  \7 F+ \- a* m; h4 X3 \2 D3 W1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
8 F! K# Y# \8 V1 L2 N- t; j5,6 vs 7,8 = 5,6 > 7,8
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Round 3+ K* k3 I  f3 F
7 vs 8 = 7 < 8# k  }6 O* `7 Z- V
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The answer is 7.
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  e8 R' m7 B! U# M( Oe.g. #3 假設13為較輕的一粒
* l+ C' i2 q+ z/ q. b1 H- v& l* KRound 1
6 f3 {4 O/ o  |$ R3 Y9 j4 I1,2,3,4 vs 5,6,7,8 = equal# v6 o6 b2 G% p8 X

6 m9 r% v) d- n' U; ZRound 2; U! Z. X& J" A( z
9,10 vs 11,12 = equal
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7 i& l4 ?( `! |- BNo Round 39 m% e, B4 z. x6 `

9 X$ x" [6 O4 T/ A/ g" u# cThe answer is 13.% y9 Z- X8 c. o2 ?7 I
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唔知我答得正唔正確呢?!
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" L% h/ z) L0 x/ [9 s# U% j[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:, }% ]% b3 S: A. I  d% |  q( s! ?
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1-6 vs 7-12
& G6 c0 c5 h* q* {# E* [8 Hif 1-6 = 7-12     13 is fake! a# N1 i: P5 d# l3 D2 C/ ~

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) X5 n' x* `. x: RWeight the 2 time % }3 d4 B" b2 _
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Suppose 1-6> 7-12
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1-3 vs 4-6
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; I  Z% [6 D8 L5 w$ x6 SThen Weight the Third
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7 J& ~. T! {/ u# m  n0 GSuppose 4-6 > 1-3
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3 j7 a8 J! L+ |! \Just like the first Step
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1 I8 v, ^, p, f# B9 [9 Y2 G, O4 vs 5 . s: u5 V' W9 H& ?0 R% R
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
1 A& L( t4 J4 k! nand so on......................

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  }/ a# v( I2 o! v% U4 P" x, W問題第二步
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3 {: q3 r0 X3 Q5 s! QWeight 1:  1-6> 7-12( y! i: R( _) |3 ^$ M6 v( P5 V

' @( w" i/ s! Z" ~' n$ HWeight 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 Z9 G, ^- m% q

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- b# I* C+ g0 H. z2 T/ B; p* L問題第三步
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% Z  D& H9 A6 J" U- Z! BWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 6 |: N* Q- S: H  [$ c7 C

' J& s3 X% M8 N( q2 p2 E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