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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! i6 a' V7 N% Q& B; z6 y+ Q* Y『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)。0 `% ?( a  S( I' U
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？』  `! W# x8 g+ O. i9 ?+ T

  Q$ g0 y- `2 \2 f8 A) @: _1 n注意: % U# y2 ~) e; q! v. [  J4 B
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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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6 m1 V6 \; V6 L* O. I& [1 f[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:" i8 F7 S" n! _' Z2 ]- P0 i, R. i
相信e條題目都有吾少人玩...

4 O7 L7 u  Z$ t# M, B我以前畫左個chart去答,. N7 k% g: N2 }* K0 A- Q
等我搵下仲在吾在3 i5 f8 Z5 T& w- r% j* q7 P  T/ v$ ^- S
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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' I$ A- ^0 |' @( p% {[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
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我以前畫左個chart去答,
4 k- s4 k9 ~2 r( k) D) M$ _等我搵下...

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2 t" p. H0 R4 ?# l& Y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:
) F" J3 G/ j3 D+ e5 ~* G; @8 Z; z唔識隱藏...已經諗到..

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sor !!!....e加改左
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. H1 Q" ?) y' ]$ `) ?+ S+ e4 ~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# V( p; x9 k0 R

. B+ N9 {- V3 J. C# f, D[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:3 y0 z' S8 ^$ D! r/ @
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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% J$ m+ C6 R7 h; a5 l& v
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- s- M8 R: {  Q/ ^! O; W& BPlayPlay, Let me know later who has the right answer and I will add points accordingly.5 ?; u0 Y) g8 `) C) J' Y

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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.
! G% p( ~6 \. B: B$ t1-6 vs 7-12
5 }+ D0 u7 x: ?8 b! X0 i+ Q% B* @if 1-6 = 7-12     13 is fake( ~. N$ n- g' ~! Z( g  y& I* y
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if not
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Weight the 2 time ! s9 v* M0 e! O  ?5 t+ R/ n: H# Z
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Suppose 1-6> 7-12
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$ z4 u( t- T6 ?! R1-3 vs 4-6 - }5 }! c0 u1 I7 T8 x& B

* Z  t. {7 l$ C) c# e+ gThen Weight the Third
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7 P, W' F& }  g1 i( B1 I2 l+ ySuppose 4-6 > 1-3
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9 s" d0 R5 C" i& o! c1 kJust like the first Step4 p: m9 c8 O8 U# o6 F1 d2 f
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4 vs 5
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* u" S/ f1 G# `% |0 `: {if 4=5 6 is the fake one
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0 A; r6 z; e9 C2 gif 4>5  4 is the fake one
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hello1997

分3組4隻波子秤! }8 y$ n; m3 v* k$ Z, P9 I8 @& b
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Group A: 1,2,3,4* c! \( t: W% J
Group B: 5,6,7,8( @1 {) \) F$ }
Group C: 9,10,11,12
  Q0 R% l8 |, c# ^' R5 ~Group D: 13
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/ g) s/ e. j* W' aRound 1
6 ~/ f" K" d. H/ ~, d% h' M' UGroup A vs Group B& `9 H2 @7 G! r! U* m8 {8 t8 c
如A and B一樣, 即較輕一粒在Group C or D
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Round 22 ^7 @5 _5 q# F# p! A. H/ B
再在Group C拆成:- \6 m9 E7 g$ D3 ~* T( V; P' l* ~) Z
Group Ca: 9,10
2 W" ~+ ?/ p5 P/ z8 D) u7 @/ ?4 dGroup Cb: 11,12
$ l# G0 I/ {7 C1 D# [然後再秤, 如一樣, 即13為較輕一粒." s4 z: K# Z3 D( B' {6 X

- Q/ ^8 U( I6 ~& s' j) }) d如不同, 即較輕一組有一粒較輕波子在其中,
% ^7 Z5 |* P6 l' b; Z+ m要再秤, Round 3, 之後便知答案.
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& N0 d3 q9 N2 H! `) Se.g. #1 假設10為較輕的一粒
, p) W8 J, D8 TRound 1
. `& |; j! A2 F8 F1,2,3,4 vs 5,6,7,8 = equal
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Round 2
0 ?8 Z; r+ ^, u, c, b9,10 vs 11,12 = 9,10 < 11,12+ T. r4 T% t, G: t
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Round 31 h3 f1 k. p, V) r: r8 ~
9 vs 10 = 9 > 10: I7 f8 Z# }+ L4 b

2 {, o& F, t4 i8 y# bThe answer is 10.( [1 E) {6 m- M% [1 v
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e.g. #2 假設7為較輕的一粒
" Y0 N2 S( e, ?0 O# x" M, cRound 19 c7 H- o) `. q) B
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 Q& }* i( Z$ [
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Round 2
& B: z; j" a' t9 @" U5 }+ T5,6 vs 7,8 = 5,6 > 7,8
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9 {$ x3 Q+ z; ^Round 3
1 ~. |  \, l8 Z7 vs 8 = 7 < 8+ X$ o& V' _, p1 H
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The answer is 7.1 H$ C1 t8 B' J, Z( s

+ T4 m4 A$ ^7 }8 je.g. #3 假設13為較輕的一粒1 O. u8 e$ j) }
Round 1
( A8 _. l' j5 i+ u1 x7 R1,2,3,4 vs 5,6,7,8 = equal* x" k9 a8 O- {% B7 p9 ~7 C
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Round 2
# J/ i: r" s7 a9 x. q6 k: C/ A! r: s. o9,10 vs 11,12 = equal3 O; G, @! M' p4 G; F9 C4 B
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No Round 3
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The answer is 13.
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0 g) v, P! }0 S$ \# Q0 m唔知我答得正唔正確呢?! / k, ~$ W) b* @

% K6 t0 |! `! }8 l2 c/ A[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:. A2 Z! Q8 ]* r7 S
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1-6 vs 7-12
  @6 |4 b9 J- k' o$ ]6 |if 1-6 = 7-12     13 is fake
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0 O" h3 o+ B$ R  I  h" U* m" n/ tif not
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+ O8 G, C; T; I5 G* _6 P5 aWeight the 2 time , g0 [) ^4 v5 h6 L2 Q1 E' s

+ h# {. Z  a8 ]+ B1 b1 }8 l* i, JSuppose 1-6> 7-12
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8 s: n& o8 u: U7 l- D1-3 vs 4-6 # s, _) L  w0 f. F) g" R

# Z% {9 O' C. c: u! m2 KThen Weight the Third! J5 C5 r" o9 @6 h) }
3.
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2 x* r. ^4 g3 [' R3 G' b% wSuppose 4-6 > 1-3: M+ N5 J  V5 f& E3 r9 K7 b
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Just like the first Step# I" j4 U1 [( X
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4 vs 5 " C& b- z/ u' K( F
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if 4=5 6 is the fake one & _$ y: m& w/ Y5 O6 b8 v/ \

2 w6 {  Y. |; k7 F' L+ f; k, s$ Y( rif 4>5  4 is the fake one & p5 b( h+ }9 t- k, S( W
and so on......................

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問題第二步
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! r& Y5 k# |/ D4 t# S- a6 ?Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-61 C! N; E) V% A

. e) L8 Q2 x. V* ]你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12
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8 I% `! \& a6 V' X1 CWeight 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