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* {- d9 W8 }* i

1 R* y! C0 Q/ W0 C『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)。
* {4 Z& P2 o" r0 q5 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？』
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# b- k9 i6 }, e注意:
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0 u' e* d" T& Y1. 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4 @: x9 a" i" R6 y) q
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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:
" Z  V9 e* \" k0 n3 m7 x相信e條題目都有吾少人玩...

. {+ a/ x: U  F* p' S; X- |+ _我以前畫左個chart去答,  c5 y' Z& @& U+ D
等我搵下仲在吾在% M) B# Z' i. H1 r. K

: K0 U( }5 n3 d8 C: X, a: d當日用左37分鐘答１２粒波子，差７分鐘才合格。$ L$ R) g4 `- @6 Z% f+ O( u: {5 G
13.........
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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:# T7 r' v5 G8 p6 V5 S  l0 F
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我以前畫左個chart去答,2 @) ]9 e: W4 p8 f6 ^- N3 t+ x
等我搵下...

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# `- G9 L9 |; a+ z  S9 z. w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:, }" Q8 H: V, n( E, h  v
唔識隱藏...已經諗到..

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sor !!!....e加改左9 B3 E) t% s: p1 ?% n8 W4 n

/ N9 p3 Q6 j3 \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/ _' i% m  f  P5 G0 w% x. K; n
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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:4 t& z4 {! c# p1 d8 e+ @
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.1 ?3 ]4 I$ S9 X& V4 L- O# T

% [- b; d1 \, v6 i* Q# Y: j) uThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  }, p3 B. l/ ]% Y* J

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.' F9 e4 {& C! f1 q9 k& M
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Thanks

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7 m- n9 U; V; W5 y不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
. I2 l5 l# G( f! J4 \3 L  [& @1-6 vs 7-12' R6 s; Z' b& O4 p0 K/ {6 e5 L! P
if 1-6 = 7-12     13 is fake
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Weight the 2 time ( L8 }% @7 a: N  i
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Suppose 1-6> 7-12* C" W7 L- _/ }3 x% H

/ Z1 C% a  m, ^1 {6 D" H) b0 U; ]1-3 vs 4-6 % G7 ~5 V" i+ ^' F6 k' {
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Then Weight the Third3 ~" R8 `2 [& D* T# w$ m2 ^
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Suppose 4-6 > 1-3, P6 f$ Z, y8 w# h" }9 R- N
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Just like the first Step
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' V/ T7 l* y) q8 h! Z4 vs 5
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  Z- _, X2 m: s6 ]if 4=5 6 is the fake one
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if 4>5  4 is the fake one   k3 R, H- n0 b8 ]7 ]
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and so on......................

hello1997

分3組4隻波子秤# N5 Z& V4 Q% Y. U& |- }9 v
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Group A: 1,2,3,4
- i# z% b8 j& L% B+ a! N* dGroup B: 5,6,7,8
9 W  [& P8 e7 u3 h0 h- zGroup C: 9,10,11,121 ^, D# C% v: f! |: g  Z
Group D: 13
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Round 1; T. q! |+ J5 Q1 S) F# M
Group A vs Group B. T/ t2 L  s& w/ I8 F8 e# W
如A and B一樣, 即較輕一粒在Group C or D
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Round 2. F- G( w7 B' v* N% f
再在Group C拆成:
0 ^, c. _+ ^1 K: n3 |4 LGroup Ca: 9,10
. z+ P) H3 ?5 ?$ y5 k2 }& r9 pGroup Cb: 11,12
6 T% g7 S! a& ]* R; [然後再秤, 如一樣, 即13為較輕一粒.
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/ Y" `: r3 ?2 r' p, C如不同, 即較輕一組有一粒較輕波子在其中, 7 H: D! I* a$ Z0 [* f
要再秤, Round 3, 之後便知答案.1 X' q3 Z* ?1 y, m7 P# o9 z
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e.g. #1 假設10為較輕的一粒
3 _8 n/ C; V6 h$ j8 u+ Z2 [5 JRound 1
' {7 G* m3 V" E, s: C$ U0 o1,2,3,4 vs 5,6,7,8 = equal
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+ t0 F/ P& A2 ~; \5 FRound 2
0 |0 l1 h7 e4 N4 Y0 @/ A6 r* s9 a9,10 vs 11,12 = 9,10 < 11,12. A! y% ?- f* D

4 _- f. z# r7 ]  B" uRound 3
8 X0 {5 j0 F: d5 k; I3 y" e9 vs 10 = 9 > 10+ v7 `( `; |: X! j! f& l4 j

, G; K8 n' R8 L9 B% P3 UThe answer is 10.
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e.g. #2 假設7為較輕的一粒: `" C" C+ p* p8 I' S. E- s+ J4 N
Round 1
/ ]3 G5 m" _! ]1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% K5 j2 C, {9 t

! D1 @, ~" v3 b" H2 y' K9 Y, kRound 2
) m2 o" {5 u  q) H( G9 @5,6 vs 7,8 = 5,6 > 7,8) \+ L- \" w# P8 V3 ]0 {

" I( Z' j3 @) P. HRound 3
1 {% U' _$ w4 Z& h# n% o7 vs 8 = 7 < 8! ?2 w  K- T/ }. A* i9 R

* V$ k- g1 v! F* T, WThe answer is 7.) H5 R: A2 L) g! o% r+ ^7 x$ }

4 T6 h' J! r( E( N, Be.g. #3 假設13為較輕的一粒5 ?- z% W7 M. K) ]$ Y
Round 1. H. B. H# w9 \  z
1,2,3,4 vs 5,6,7,8 = equal8 s$ c+ M% D% _8 j3 W+ D

( t; }5 K2 j, p& w: ?  sRound 2
* Y- _6 B. U  r9,10 vs 11,12 = equal. t; i+ }0 ?1 q% D4 h

9 I- G8 u: o6 D1 |9 Y  n9 \! Z& iNo Round 3( E) ~% d+ _* D

, E' b! A8 q3 ~. sThe answer is 13.' a/ r- A" E; S; a

' p' i: `: {, d7 h4 \唔知我答得正唔正確呢?! 5 x# O+ Q% L! g0 b

: c( y" q$ H; q2 V' 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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2 Y. U& s" @" r( b1 E* b1-6 vs 7-12
# y5 y$ w. Y. W" xif 1-6 = 7-12     13 is fake) _' Q8 b& [7 e$ ?* k
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if not
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Weight the 2 time
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1 v+ @2 M. b% KSuppose 1-6> 7-128 b" Q5 z5 K" p& ?, I" S" P/ k
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1-3 vs 4-6
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Then Weight the Third+ @9 X, y0 ^! l9 d/ v! ]
3.
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" f+ U( U9 D9 @  @/ A4 h2 R* fSuppose 4-6 > 1-3. B9 k7 H; t* e

- M- W; |- R0 }; A8 ZJust like the first Step
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8 l& E" _3 I7 U; ?1 I4 C4 vs 5
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if 4=5 6 is the fake one
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' L& z9 e+ V* x: Y9 A0 A/ C. p% tif 4>5  4 is the fake one
9 w  z6 ^4 h9 ~! C5 _0 v& nand so on......................

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問題第二步" L+ Y* i9 `- k. G

& h1 }. _: V- dWeight 1:  1-6> 7-124 g# A, k$ V' r4 Q3 m7 Y: \
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6) Z' C; e( V7 g1 T; U* W9 \

+ _) x/ U2 u! E8 l你第三步点去搵 7-12 边一粒???
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========================================( o" Z# L' e1 Y0 }

7 o6 J0 t5 m) s2 _/ b問題第三步
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Weight 1:  1-6> 7-126 F1 a/ k9 `5 j* C9 B5 T
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Weight 2:  4-6 > 1-3
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( D9 k5 ~# e" {( b* }8 f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