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$ u4 |8 g- D/ S# s. |' X
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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)。, f$ P  Y0 e0 F8 C1 R/ {# S' g
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？』7 U/ h" F; i: m& Y0 U
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注意: & r6 ~( H3 @" Y" Y0 C# E! K
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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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- R4 ]4 \  T6 O7 j2. 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:% {8 Z) Y) u: y6 G8 o
相信e條題目都有吾少人玩...

$ [5 f0 s  X2 I我以前畫左個chart去答,
; |8 ^9 g. T- x" l等我搵下仲在吾在
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8 o; _5 q( _2 @1 ?2 z當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 N1 A7 G  g; w: v. s+ {  W8 j3 o13.........9 \* m# ^3 }7 `* J
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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:1 s2 R2 u+ M" l* F
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我以前畫左個chart去答,3 P# f; E7 `5 |* L
等我搵下...

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0 }, X- @- N, C: v2 S2 Y6 @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 p% ?) n, K  {# E6 w* t唔識隱藏...已經諗到..

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! D3 @) l$ i8 v' |& U+ wsor !!!....e加改左
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& R, |' f; A5 q9 n  l$ u/ 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:9 K3 I; q9 B6 \* R3 |
相信e條題目都有吾少人玩...

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$ K$ V9 ^4 O5 L9 f  yPlayPlay, Let me know later who has the right answer and I will add points accordingly.. I" z: M7 i0 A- e) J

! j( S! g3 b8 ^, z* L. z  MThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:" Q$ d) _3 b# H* k0 B

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' x" P4 s+ l$ _% QPlayPlay, Let me know later who has the right answer and I will add points accordingly.' P6 S; ]" S9 f6 s- s  V4 ~3 m+ a

: W  {; |7 T9 D; x* zThanks

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' i: V' x- ^$ W+ p不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
* [1 y3 N4 N$ J1-6 vs 7-12
; B  ?; s2 y% U1 B- kif 1-6 = 7-12     13 is fake
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  ?, B* E: p9 U/ u" a7 M* Zif not 4 h; c) @7 \0 k" _4 K

; ]# D& `5 X+ _Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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( Z% X3 n! F5 s" s& Y+ ?% ~' X! DThen Weight the Third. @4 w; o& a( j! C- A
3.
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$ Z% U" p, |2 {6 T7 F& ]Suppose 4-6 > 1-3
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1 B. Q, k( b, `- S: \Just like the first Step) I! I% x2 m' Q7 @, h* @9 Z; G- A

3 d* _! Z4 M( B4 H4 vs 5 ' ]9 d' s8 P% h: k" i; F+ E
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if 4=5 6 is the fake one   W+ \2 r$ J  I8 V# P/ J! l* F" D; F. e
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if 4>5  4 is the fake one : N# V9 P9 t: u) A- Z5 S
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and so on......................

hello1997

分3組4隻波子秤& \8 c) Q2 p! h; G

( {% F* _9 J! l$ QGroup A: 1,2,3,4, h) ^1 ^7 t; |
Group B: 5,6,7,8
2 X( K* {% B8 _; pGroup C: 9,10,11,128 g1 j, S9 d( X# l
Group D: 13( J* T- Z: f  C4 K. C* L5 ^
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Round 1) P$ ^5 f- B: r( u% Q
Group A vs Group B% p8 y( t8 I* l5 b7 c% `
如A and B一樣, 即較輕一粒在Group C or D
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  N1 K/ F; H( B! {. D3 eRound 2. B- q+ A+ D. r% N, w
再在Group C拆成:
: Z: F  c- y% q. E2 x' x9 [) aGroup Ca: 9,10; i( o. g% ^! e; j# m. L
Group Cb: 11,12) m* P- v6 s( ]+ p
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, ! K/ C1 J* w) b) q4 C+ h
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
0 z+ i" h* A9 h1 ARound 1
" U$ H3 C; d$ d+ x  ^0 T% I1,2,3,4 vs 5,6,7,8 = equal& {3 }& Q3 ]: W2 M3 g
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Round 27 @$ L! Q) A8 K9 S
9,10 vs 11,12 = 9,10 < 11,12- k6 L5 c2 n+ d% @! e; t" ]

; ]' q+ N; V1 d- v# ]$ KRound 3; i4 P8 ~/ r) J
9 vs 10 = 9 > 10
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The answer is 10.( ~- E# F+ t1 R5 \$ j

5 N! ~- X* W5 ?8 He.g. #2 假設7為較輕的一粒
2 f* q- V8 `5 e. R! ^9 sRound 1
" g& t& e  j4 J1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ P: g$ G$ X: @3 X: A- R/ q" ORound 2
* Q7 Q4 ]) r, d5,6 vs 7,8 = 5,6 > 7,8
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Round 3
. c- L8 F) H$ s; D2 n7 vs 8 = 7 < 8
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7 G1 L# n+ a% rThe answer is 7.! z! V4 [, Z* a* [5 y* R5 X
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e.g. #3 假設13為較輕的一粒
: ^( ?" `, O: h( [% ]+ KRound 1  D% H) {5 d. {" J! x
1,2,3,4 vs 5,6,7,8 = equal
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Round 2& J# F0 X  a) a9 D7 Z
9,10 vs 11,12 = equal& b" v1 u* a0 G; a% m2 w$ ]" `- s
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No Round 3, h7 |( I6 G3 J9 T0 Z* j* g% R. b

  Q) t% K  K* A+ fThe answer is 13.
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8 `8 P! C6 R* P- A7 @3 A1 Z' `唔知我答得正唔正確呢?! : z! _4 A" t: I3 O& n9 F. C) o0 N

( ?6 ^  M  X) Z; ^( y) \[ 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: d; O6 a" \, ~. z3 _
if 1-6 = 7-12     13 is fake
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) k3 \) \3 Q; m7 X2 F4 R) z: M; AWeight the 2 time
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8 Q/ v) }0 `/ `0 f+ _, eSuppose 1-6> 7-12
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1-3 vs 4-6 - F+ X$ s4 ~# I6 u
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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* |+ E: P' [% c. W. Y
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4 vs 5
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7 e  J+ l" v. G  }/ {3 |5 Oif 4=5 6 is the fake one
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5 z( }2 w" U  `( V6 @; P. ?( [) Bif 4>5  4 is the fake one
3 U) h! \2 u& W, r& Y1 S9 N$ Wand so on......................

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) n+ \+ S$ j2 _% c問題第二步
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' ^, }: Q+ u. ~; |* r& MWeight 1:  1-6> 7-12
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8 [+ J" h# p. }+ |. C8 }6 oWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6. N; P# X1 q+ g- }2 X8 t2 ^% w- |! {

$ {9 S' _* H9 B9 C0 j你第三步点去搵 7-12 边一粒???2 Z8 R, z) V) N3 i0 r

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# \- Y9 _% ^9 G% @/ O' w3 e
% z7 k4 F$ U' [問題第三步4 y% b. _/ h8 ~2 e

3 G# P# G8 j. t/ C' h, K2 JWeight 1:  1-6> 7-12
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/ \& m8 u* G; C( T+ m* pWeight 2:  4-6 > 1-3 : z7 K9 M1 O0 w$ m

4 n# P+ i( p! F' B: f' w5 p5 @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