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$ Y- \* A( m3 C2 S! }# p5 I7 J
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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)。+ X  C1 Z- r1 M6 O) i. a" C% ~
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？』$ T/ ^1 u: M# k5 o5 R5 ~4 C8 V
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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
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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:
1 _9 X4 h- t% N- i相信e條題目都有吾少人玩...

  ?# G, D: T" ^我以前畫左個chart去答,+ p/ t/ C# k1 V
等我搵下仲在吾在" w* W& {2 C& v! J) v9 W2 B# U& u
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當日用左37分鐘答１２粒波子，差７分鐘才合格。+ j' G) V. C0 S. m
13.........
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- A0 O- P) q* @8 i5 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:3 ^% E# q( {$ }( e! y

& x0 s4 c9 W: Y# M: ?9 [/ h; b我以前畫左個chart去答,
* G  ~; C1 U" |. H5 }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:6 X( _7 ^. ]' x+ K
唔識隱藏...已經諗到..

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& w! f3 [. i' T% A9 csor !!!....e加改左. f8 `6 K  r( R/ V

, |6 U' P+ u4 X$ t- W2. 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2 a7 l" @1 y- ?+ ~2 G( @6 K, u( E( z( C

7 K4 Z; S1 d9 C" p- a[ 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, @* |0 E4 n9 s, k3 T
相信e條題目都有吾少人玩...

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0 ~, `7 ^" e) `7 C+ OPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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4 J* _  c2 h& v% ~5 h, oThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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/ i  l9 m8 Z2 f6 xPlayPlay, Let me know later who has the right answer and I will add points accordingly.1 A' `1 z! f1 A" r
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Thanks

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3 {; Y, N* }- j) p# D" |. O: V) V不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.6 m+ q  H' [7 @0 s, g+ c# R" }' i
1-6 vs 7-12$ ~' v3 n0 q. F5 Y4 Z6 U
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12, F1 G. w1 a9 ~+ N
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1-3 vs 4-6
7 z+ V& b8 S3 R5 Q2 o* a8 ^3 u4 C# S7 l# A& T+ J1 o9 J! C( `
Then Weight the Third
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$ |* i+ o* T; b: H/ Y9 ?
Suppose 4-6 > 1-3+ x$ ?  q! Z8 ?' s3 X6 h

* [4 S* V& W* XJust like the first Step
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4 vs 5
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9 R- V( g: d. f0 V5 tif 4=5 6 is the fake one   z1 |5 `& B5 k3 G6 ]; v
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if 4>5  4 is the fake one " i4 r: l4 i5 u- x" X0 x/ C! X+ Z

* e" s. I( P9 g; u1 f1 J' y" Oand so on......................

hello1997

分3組4隻波子秤8 T$ u* ^& X& e& I

* B5 }' ~' ~+ D, p" U6 V0 {! i* tGroup A: 1,2,3,4
. C9 u0 p2 f5 @" h- A) U, tGroup B: 5,6,7,81 U0 x2 I1 H& x7 m
Group C: 9,10,11,12  F- C* H6 k# i
Group D: 13
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Round 1
, }* r' x7 C% LGroup A vs Group B
7 f5 m- ]$ k( B- v. w7 H如A and B一樣, 即較輕一粒在Group C or D
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# \. x! x; c( A5 p1 s: z2 FRound 2
* O4 {. k( j% z8 S/ ?) e+ j; z再在Group C拆成:) B: {' d; S3 U1 E
Group Ca: 9,10
1 `3 S) Q' R; {: IGroup Cb: 11,12
) D* g( }0 D! t& R7 E然後再秤, 如一樣, 即13為較輕一粒.
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3 d/ F' U, F1 z: i如不同, 即較輕一組有一粒較輕波子在其中,
6 m* P  ?7 N! e& X+ c+ \要再秤, Round 3, 之後便知答案.0 q; g' S2 f9 f! W" P+ f
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e.g. #1 假設10為較輕的一粒
, H4 c5 T  s% t: l+ r& w8 s  wRound 1. a' ]. M* y# a. I6 f
1,2,3,4 vs 5,6,7,8 = equal
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Round 24 a& J: G" ?8 S2 a2 J9 K, }1 V' L0 a
9,10 vs 11,12 = 9,10 < 11,12
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, x$ r3 P  M4 b0 T$ BRound 37 {, u$ m! s# l+ S2 F& I+ a% g( V' i% L
9 vs 10 = 9 > 101 ~5 F! u* e4 ]' w2 a+ o" G- Y, f. f

, d$ l0 Y7 \% D$ T# v- ?4 @  lThe answer is 10.2 k9 j  r( }+ N$ C& u' |
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e.g. #2 假設7為較輕的一粒) G( F" W2 o3 [: w
Round 1
/ P3 z! S5 G! C1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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+ a8 B/ N# i$ V4 ^& x5 ^) xRound 2. s" }8 j$ p4 X" G$ c
5,6 vs 7,8 = 5,6 > 7,8* k, h/ g0 `* I- k, k. a% p

$ x, H# N# g8 x( V7 ~& [4 P$ cRound 3
# j/ y: W6 }$ E8 I% Q+ F4 J# y7 vs 8 = 7 < 8$ v* g! x1 `# y  w* ~: S$ P

' u! A9 B, y# z( E- U- IThe answer is 7.' H4 v$ b" g8 V" a7 v2 P# W5 U

/ c, O" h) V4 m; {  `6 fe.g. #3 假設13為較輕的一粒# C# t: P3 a% o2 d
Round 1* w: r: q. Z, S- V# [6 L
1,2,3,4 vs 5,6,7,8 = equal+ ]* H% l3 H3 d$ D

# v6 y4 O- J/ ^  G  n# B1 [( uRound 2# k. A" r  ]+ d1 ^. U7 t' H* z
9,10 vs 11,12 = equal
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( @- `' F) o- u4 N; m5 ]No Round 3; L6 F4 R0 X! S8 u" q* g2 c, M
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The answer is 13.0 j! Y7 a2 h* D/ W5 k! r+ y3 x

5 F' V" `, e4 u( U) b唔知我答得正唔正確呢?! - j- V2 A4 r- b( o; n: B: M
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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:
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1-6 vs 7-12
( l9 i/ K9 j2 Z* Sif 1-6 = 7-12     13 is fake
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if not
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) U! Y. j3 }) x2 J' G. BWeight the 2 time
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# ~* {, L' T( b9 z3 P/ N, l4 LSuppose 1-6> 7-12
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. ?# p, x7 E4 ]& q. I1-3 vs 4-6 * J. f! J6 r0 C
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Then Weight the Third5 x- J, q, i, D0 |5 T8 @
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1 ]# _9 s8 d* [0 K9 z( ^3 eSuppose 4-6 > 1-3
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$ C5 N" ]9 Q+ C- |% VJust like the first Step  ^" }) \" U7 M2 z

5 w$ X, _# K/ D) k3 b0 R4 vs 5
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+ r" y" S/ @" u# h8 Y1 sif 4=5 6 is the fake one ; O: \* K' y7 c; q5 p" o

+ R1 g7 G1 Z1 M! j- e. K3 l! @if 4>5  4 is the fake one
4 m6 g% F: Y/ w$ F0 Pand so on......................

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- n8 f+ |7 O% {問題第二步% D9 B# `5 V. f3 S2 `

# t7 t- x  d  ~# VWeight 1:  1-6> 7-12
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! {1 h5 m( t4 K$ r$ l$ b9 MWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6( U5 |9 }# \/ V( x: {( F4 b

6 I0 z1 h6 r* t( q! Q; q你第三步点去搵 7-12 边一粒???" O8 i' |+ |0 G# g) n. L

& n) q: {5 h+ s# \% q6 R  a& k========================================
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2 b' A. K: [' a% Q5 ]# `4 O! c問題第三步$ S- T; S. M' P1 w6 n5 ^4 N! t4 r- o
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 # E% X- t1 k- e' @
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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