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% f9 q5 g, Y7 X. S; |3 \2 H
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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)。0 ^+ \5 X9 D" ?* E
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! }/ I$ T! H! |& A( A* J

( k2 b5 V% p; N/ O9 r0 T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; S8 v% r- _! a. N: ?; c5 j' Q

& f. m0 r: \# \3 L) a' c2. 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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% \% R/ P, \/ F# A9 x[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:% t+ p( S0 N. t+ V; f
相信e條題目都有吾少人玩...

  @! l1 n9 j2 e5 H3 |我以前畫左個chart去答,
! L9 r* |6 R: v+ ]1 E等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。3 u; {4 B( b& o: s( K. |
13.........
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4 o$ g' u3 {3 Q/ i' g8 h/ c* a! a[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:+ u0 ?+ [5 n' {) c) t. \" h* l
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我以前畫左個chart去答,1 u4 L  M3 T- c; O+ X' ^; z
等我搵下...

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3 T( @: E" p  ?' w# Q% G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 d" H1 y$ |唔識隱藏...已經諗到..

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& G9 Z  K; B' F1 Osor !!!....e加改左- ], ^- T- L8 ^# l; c) C; ~
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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
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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:( q: A+ H" Z3 Z8 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.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:1 u9 f* [: P; q' Q1 f: ~
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; J; l, g, y# q! I8 i( S5 q; UPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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- v0 }6 u. x# Z( C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 7-128 i: m1 ^* f7 u7 d1 w% }: I
if 1-6 = 7-12     13 is fake7 _5 O/ L9 Z7 N# l# Y/ q! {* n" x

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Weight the 2 time 7 c# q, G1 {" @8 B/ P. k. ~! F8 F! N

9 ~2 T& W' q/ r/ o9 SSuppose 1-6> 7-129 Y: n: ~: ?: S2 J3 g  d

* ]! D4 E' ^9 T& A7 U1-3 vs 4-6 ( G: a7 G! Y) i% j0 \" c$ u

6 t8 m  p- [1 N2 Y/ `Then Weight the Third8 q1 \! v- T; Y- D1 F4 E
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Suppose 4-6 > 1-3) v) }+ w* f) t3 j
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Just like the first Step& j+ n% |0 X( s
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4 vs 5 ; Z* {3 Z- l! W9 [% x' i
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if 4=5 6 is the fake one
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1 f5 P% B2 H0 [5 \* Q- p2 Vif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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% ~8 u% ~' t7 M2 mGroup A: 1,2,3,4: |$ n' M6 N5 C0 d' }
Group B: 5,6,7,8
/ b. U8 B4 T1 L$ @, T* @. O6 g4 W) MGroup C: 9,10,11,12$ b6 X: ^2 X( _% m) y! m( @
Group D: 13
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Round 1
2 u& _/ {  T0 O  \- fGroup A vs Group B% G4 n5 O5 f9 {, a4 _* \6 Q0 R' P
如A and B一樣, 即較輕一粒在Group C or D
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Round 2# j/ J  Z5 S: y
再在Group C拆成:
& s2 j4 U5 T* X9 A3 _1 q6 RGroup Ca: 9,10! Q, X, @! R+ f1 w& ^6 y& A
Group Cb: 11,12
- E5 b7 C/ l+ M8 n然後再秤, 如一樣, 即13為較輕一粒.
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# e" ~. e5 U' E1 w, v) L如不同, 即較輕一組有一粒較輕波子在其中, 6 @' O5 W( J+ p1 i6 F. s) N
要再秤, Round 3, 之後便知答案.
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! h  q- k* [- z4 \; ae.g. #1 假設10為較輕的一粒+ i  X# G( d8 b
Round 1
0 Z/ O* \& `% _" R/ ?* e1,2,3,4 vs 5,6,7,8 = equal
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Round 2& V/ G' M' `9 C1 n" e( u. n% J9 K
9,10 vs 11,12 = 9,10 < 11,12
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4 `' ~& E2 H  n7 n' g$ j) CRound 3
( T1 ^& _$ ~. C5 ]! L) h9 vs 10 = 9 > 104 K, G- a# O" c% Z) Z
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The answer is 10.& U9 `6 t1 r9 c6 b- S# X

6 b, m& U/ K* v) b  H8 b) fe.g. #2 假設7為較輕的一粒2 f0 M" b! Y5 _
Round 1/ `& P7 y+ S: D& W
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% P" v5 J4 w, G8 [3 i6 o
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Round 2
: t/ n% n( }3 n# a7 X' n& V$ D9 u5,6 vs 7,8 = 5,6 > 7,8
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$ [* B7 k2 n* |: f+ e  W( aRound 3
: S1 H" g) @1 U6 h( ]7 vs 8 = 7 < 8
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6 r4 [/ y! Q& Q) UThe answer is 7.
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e.g. #3 假設13為較輕的一粒
% ?0 Y2 D$ X7 [$ B8 N' {Round 1' }+ w* p3 |) W$ @6 n
1,2,3,4 vs 5,6,7,8 = equal
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Round 2& ^' D! g+ M- z1 F5 r" b0 e
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?!
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! e* i5 ~0 z9 f% p/ R9 d# e+ ^5 |[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:& t0 d( `8 l! U! y! e) c0 k
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1-6 vs 7-12- i2 e. S" [- H* u, I- a; {
if 1-6 = 7-12     13 is fake! b( m) J' D: k; p$ G) a. u
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if not 1 I" ], ~% H% Y" J$ U& S
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Weight the 2 time 6 q' N. T/ [' g" ~" Y% y$ S: r
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Suppose 1-6> 7-12' g% K  o7 Z$ ~7 \

% t/ H5 g1 e0 {* W" K/ C6 q/ o1-3 vs 4-6
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+ Q% T% L( i6 D! \! {+ YThen Weight the Third
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Suppose 4-6 > 1-30 y& r3 C, r8 R6 q$ t

2 P  U: H/ r9 m( NJust like the first Step) A3 P2 F) L( t% j% h! H

9 n9 v1 c$ K- q! j4 vs 5
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if 4=5 6 is the fake one 6 L3 X* [% I2 N" ~0 C! c

7 |( }& p, S/ l1 b8 jif 4>5  4 is the fake one
/ j: }( J; z7 eand so on......................

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問題第二步
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Weight 1:  1-6> 7-12. q% f- ]: r' m) U; c' `+ ?
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, l0 a' S, i8 p3 W. b
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你第三步点去搵 7-12 边一粒???
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========================================
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" v" N3 m. f% B8 {- `* g1 H問題第三步8 N: W% ^- |* K/ |  R
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Weight 1:  1-6> 7-12" z& a0 y, b8 F3 _  K
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Weight 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