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- n' q2 D  A; ?  s' n8 }. I6 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)。8 P5 R. t$ ^) B# M4 r4 |
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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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' {: C: @) f' w% B* ^4 @6 _

7 M: k: w. u6 P7 j5 S' h2. 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:
" @) J: x$ k4 ~$ u; X2 @& |相信e條題目都有吾少人玩...

, r% H7 S7 s; A% Y/ Q9 V, l0 l, m我以前畫左個chart去答,2 {9 c$ h% b5 U& V
等我搵下仲在吾在8 F, V6 _5 I$ o5 K

7 g# r/ z9 q6 \) e% d當日用左37分鐘答１２粒波子，差７分鐘才合格。9 V$ P$ B9 m' g& I
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:
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我以前畫左個chart去答,
6 Z8 f0 n$ z8 s7 _* U9 o6 Y等我搵下...

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, a; W; {+ t+ f: E& P( ^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:
( D- L# t8 _6 v5 x9 e9 }唔識隱藏...已經諗到..

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8 u$ `3 K# Y8 F5 a6 d" hsor !!!....e加改左- A4 i' R: c/ x6 s0 {  J

  y7 k$ I! W2 o  A2. 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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/ }+ U  Y0 A1 ^1 I8 n2 f[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ r7 g% m$ F) s, c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.  t+ B  e. S4 l2 }0 {1 ?

% i0 g; o) f0 N! r/ wThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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" \5 O# _, m8 d' R8 P# c3 d# x6 UPlayPlay, Let me know later who has the right answer and I will add points accordingly.8 K/ \: _3 z% W/ m4 z- u( W
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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

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1-6 vs 7-12
8 Y; C- E4 v" z, u6 \if 1-6 = 7-12     13 is fake
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if not
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4 F% e2 N* S1 j$ k1 nWeight the 2 time
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Suppose 1-6> 7-12' _& t5 V% H4 F' ~% G3 [

/ z5 Y# l( ~( O( N4 j2 g: \# h1-3 vs 4-6
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7 \2 R* @4 p9 f6 O( U8 SThen Weight the Third
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Suppose 4-6 > 1-3' x$ y1 [9 y, S8 q( }$ [" F  a

7 A+ j' z1 R. {) Q4 iJust like the first Step# R. L' ?) d- X. K: B! U  C
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4 vs 5 ) U7 {/ Q1 j1 G6 K
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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6 Y# W% S$ x: ~and so on......................

hello1997

分3組4隻波子秤) i# {4 w  g0 A. w- G6 G1 S# |
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Group A: 1,2,3,4
. {- w$ ^! R  R8 lGroup B: 5,6,7,82 ~& O, \9 S1 t
Group C: 9,10,11,12
! T  t. a& O. x5 [' zGroup D: 13
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& T& i6 F, m& qRound 1' ^0 D6 P# S& R! I  @4 V
Group A vs Group B2 r) B2 g7 J/ C2 u( c
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
4 S! W9 S' K3 Y  X) ^* w2 h再在Group C拆成:
" \! w; B( N6 T9 r3 U/ wGroup Ca: 9,10
( s" L2 ~% N! c6 _/ PGroup Cb: 11,12
9 ]. S- t3 j% [( |$ f. N然後再秤, 如一樣, 即13為較輕一粒.  {/ t" w) C; l" ~0 S
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如不同, 即較輕一組有一粒較輕波子在其中, & W% o* |9 C* l6 t5 x: `; V
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
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+ P1 y! ?% w! i. F8 L+ K1,2,3,4 vs 5,6,7,8 = equal
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: \' x3 A( M8 @& Q( {4 t1 |Round 2% j5 A5 v& y  c! s# o( A, p5 O
9,10 vs 11,12 = 9,10 < 11,12
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) p) h+ n5 O- [+ D: V! Z: JRound 39 f/ K' i0 @+ O! g* h' b
9 vs 10 = 9 > 10
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0 @7 b' g7 a3 i; B, _: U# }" ]The answer is 10.* n1 H' q, }" X

( e1 [+ \4 h9 x7 We.g. #2 假設7為較輕的一粒
7 X+ y8 {+ W! }0 G1 f( wRound 1
7 ]2 y* G$ G: f; t( U2 H0 N) j1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,89 E  V+ w' S( H8 Q8 ]
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Round 2$ q0 q( A8 M6 X+ _( N  m7 u
5,6 vs 7,8 = 5,6 > 7,8! j7 B" A; }: H1 G3 o
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Round 3
% _4 p. A/ p8 ?: ^7 B+ l- C7 vs 8 = 7 < 8' z4 D7 Y5 B% P
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The answer is 7.
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- P, s0 `) Y/ S0 de.g. #3 假設13為較輕的一粒# z' Y6 y$ Q" c1 K0 X
Round 1$ g5 j* G' |2 Y0 U$ b
1,2,3,4 vs 5,6,7,8 = equal
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, C8 N' B( W; F- w3 oRound 23 r! O' i; J9 M, m5 o+ B; k! k5 ]. [! U
9,10 vs 11,12 = equal% c9 [3 ^, u9 M* i: t

; Q2 m8 b; V: L/ ~. r- u' cNo Round 3
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The answer is 13.
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" N4 U# F' g( L' r8 O, Y2 W' K3 b8 K唔知我答得正唔正確呢?! : \4 W- p* B4 U, H+ r( J

+ J; h) h+ ], k! H+ A+ D( K7 C! s[ 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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# n7 k& r/ v& L4 g1 i1-6 vs 7-12: f  ?: L* e4 A1 S% K4 o
if 1-6 = 7-12     13 is fake
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if not
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8 a* |* G; W% o+ mWeight the 2 time 9 I+ o% y7 E* m7 x. ]; `" H

/ K8 s* k+ L- MSuppose 1-6> 7-12  z/ s3 Y. B% r! V; L" Q9 I

  y" v( \+ i* a% B0 E+ M/ ^1 m1-3 vs 4-6
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Then Weight the Third. j+ Y1 H* V$ F5 H* F" f3 \
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 $ @, a3 I2 \$ @7 k$ j- q
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 6 o2 T- E  c* d/ |  {; M6 M0 c
and so on......................

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問題第二步2 U9 {. T9 M' {5 L3 N1 i7 j6 [6 X! m3 s, C
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Weight 1:  1-6> 7-12
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2 A% [; Y& z  X) R' ~* a; `Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6  l" `" y) g" ]) |$ }  v0 e

& d4 _% T7 y& I  B! O你第三步点去搵 7-12 边一粒???
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========================================
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問題第三步
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/ ]& ]( X$ ?/ ZWeight 1:  1-6> 7-12
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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