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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/ O$ K" r" p1 h9 x; m' `『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 \3 ?2 ^- b0 ]! Z6 i: [& d5 `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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4 M( W2 ]/ V- W4 ?注意: 7 q+ X8 A6 p( i/ q6 Z! k& d; B5 ~

$ B  [2 C+ A" P( B! h1. 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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- @1 o0 j7 O6 }6 i- x6 f2. 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:
: ^+ F/ ~' D( Y" h  }2 q4 Y; y相信e條題目都有吾少人玩...

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我以前畫左個chart去答,
% ?) t& b- W( h. u等我搵下仲在吾在
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, J: R, V3 c; u# g( d$ e! G+ |當日用左37分鐘答１２粒波子，差７分鐘才合格。  }7 K; r7 q) X# a3 L, x! K
13.........' I6 {7 F) w0 u( D
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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:3 T* N+ H: i6 j8 p' ^
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我以前畫左個chart去答,3 s$ j, Z2 H/ Y
等我搵下...

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& V- u6 p3 ~/ s/ V/ m# h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:2 U  n* j8 r$ o8 T, B+ X
唔識隱藏...已經諗到..

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sor !!!....e加改左# Z7 ^7 c2 B: e6 l  b  g* a
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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' o/ L& G& Z  D, X
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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:% M" [2 _) d3 c/ y" c1 }4 H: v
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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% y6 M- }8 W+ O$ m% A+ WThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 f! `6 a# j, O& ^+ `! k

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+ E3 S1 @" c# HPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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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.
- }8 W. T% r/ ?. `) c1-6 vs 7-12
/ ^/ S6 i: D& l' T1 J' z/ c- w  Zif 1-6 = 7-12     13 is fake
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if not 2 d- P% r' x/ E
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Weight the 2 time ; M. H6 G9 ^% Y, j3 I3 y) k& I

6 f7 T/ R+ Q: P' g2 q* {* V# @2 g+ tSuppose 1-6> 7-12  |# ^7 n' m( Y& ~* z- Q4 V1 S
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1-3 vs 4-6
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Then Weight the Third
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! @9 y# h( A  U# m; D6 i( oSuppose 4-6 > 1-35 |. v# C7 V4 `6 I7 t/ V

1 {! |/ M  W/ }( ~( aJust like the first Step( [( q7 L( q: j
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4 vs 5
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if 4=5 6 is the fake one 4 X' s* E2 G5 ~; f6 `) i
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if 4>5  4 is the fake one
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# N7 @, A( ?4 b# f' ]and so on......................

hello1997

分3組4隻波子秤. x7 S" Z0 g. b6 F  W
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Group A: 1,2,3,4
1 Z, ?: Y9 G, B* z2 W) OGroup B: 5,6,7,8
# l* A6 R& A2 ]* t# z7 RGroup C: 9,10,11,12* T8 l. w, q& L" j! J. q
Group D: 130 }6 \! d8 G9 n6 I' A# K7 B
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Round 1
4 I5 W* e; B2 V5 D6 JGroup A vs Group B
4 N* `2 F4 D3 V. W% r$ o如A and B一樣, 即較輕一粒在Group C or D
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Round 2* b) q9 Y8 W# @
再在Group C拆成:
7 e; u6 w. F4 }7 HGroup Ca: 9,10( `! i% d8 D; u; @8 W% Z; W+ d
Group Cb: 11,127 T6 _9 @$ c3 R) ^$ T
然後再秤, 如一樣, 即13為較輕一粒.
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( u) Q) P- e6 `. r如不同, 即較輕一組有一粒較輕波子在其中, 4 B+ b/ F2 j. O
要再秤, Round 3, 之後便知答案.. m0 U! e+ L! ^" i0 Q& G1 ]+ @7 I( D/ o
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e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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1 |6 i  W( e% |& ]& oRound 2
4 n& \# }- @( i; }' D' _# |7 ]9,10 vs 11,12 = 9,10 < 11,12
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* {) l. T; W9 K6 e" U0 ZRound 35 S& k/ c* q7 j! N# }
9 vs 10 = 9 > 101 Q* p# z: h$ \4 x1 P. x
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
- u  D2 h: X; B  U8 [Round 1+ {( g9 s. _4 h% y& ]: T
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% M; x$ p5 w) a" `
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Round 2
% n( E5 @2 Y; `/ C& n, {# N5,6 vs 7,8 = 5,6 > 7,8% X) J  J/ k0 Y; G; [, W
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Round 3" n+ \9 A" t8 T! K* y6 M7 g
7 vs 8 = 7 < 8
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' U$ j- E4 {) W+ B: ~* _9 zThe answer is 7.
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3 o' p, x: H8 u7 S% Y6 ]e.g. #3 假設13為較輕的一粒
+ i1 E* O2 S: }( z- iRound 1
" a% R! _' j) t6 y: k1 x1,2,3,4 vs 5,6,7,8 = equal6 T8 t  Z' `( @/ F/ [) h

* Z# h% }0 s: \Round 2  k9 k; }6 s: G6 S. V
9,10 vs 11,12 = equal
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No Round 38 e4 Q6 m& `. Z8 K! G9 n. ~# R

; Q2 x: s4 z/ k8 ~- u- QThe answer is 13.; E2 f! N1 I0 F

7 |, c# D; X* l$ R% S唔知我答得正唔正確呢?! 9 o1 r- T3 s1 y3 n2 M/ v
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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 7-121 W) H" N# M  \. L. X# `  [
if 1-6 = 7-12     13 is fake( B+ a: K4 ?: B- s2 A

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Weight the 2 time
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Suppose 1-6> 7-12
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6 Q" h6 e4 L+ i5 O( g7 q9 w6 N( C! F1-3 vs 4-6 + l& I. S  p" i! O! m4 Y

$ \0 i$ x9 `+ hThen Weight the Third6 w( T' P1 p( E* Y! R
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Suppose 4-6 > 1-3
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0 [( z! p$ K. {. C9 `7 n0 U4 ~Just like the first Step
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4 vs 5
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8 m. }* ]9 v) g  |if 4=5 6 is the fake one
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if 4>5  4 is the fake one & _5 A3 Q+ P$ [. k% R0 r! s: e
and so on......................

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$ ]" Z% ]; x6 f$ X4 h5 Z9 B問題第二步
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+ v5 m* x$ V/ E' \4 a; i& A' aWeight 1:  1-6> 7-121 K* N( v3 G. k- l* Z$ |
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-62 s9 e0 t" K7 u) E7 g

, h4 I" j- u( j' Q你第三步点去搵 7-12 边一粒???- `* k7 H/ k1 L: K4 w0 r

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+ i; C& T) |- h2 W) m問題第三步8 E4 A' ]1 O7 x! `- h1 ]  Y9 b8 t

# U' Q! g* a) S9 O  ]4 rWeight 1:  1-6> 7-12
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0 y2 P- U3 A! e. ~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