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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; g# j1 q# h4 R7 @『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)。( a% N  Z4 t2 w# `/ y
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？』* G& m8 {: b3 u" ~' G

! U9 d5 P/ @  L7 o* ~注意:
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, _( A1 M: ~9 o9 K, \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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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5 H; [! b$ n5 d* x% F' K8 B; ]

1 q. j8 b: Q% p# @7 O8 T' T[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
. u5 x3 Z4 C8 h7 R% f相信e條題目都有吾少人玩...

; c+ q% H1 O9 Q5 ~' D7 f. v我以前畫左個chart去答,2 ~8 \4 t1 v( g0 a  j8 U4 {
等我搵下仲在吾在, ~5 Q4 o+ u& D# u* V" b- Z

5 P- d4 [8 _: n( U& [當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ |. u  n3 h9 O% a9 h: b( S- w13.........0 ^. f; ~9 G& B7 f

4 h8 q  U9 G  k! d; m6 F[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:* P% M. b7 C+ h. d8 {
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我以前畫左個chart去答,
1 G1 R# h- r" d' S# E9 ~等我搵下...

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9 G9 y8 l5 R( r- J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:
  A* n9 g& [( s# E; L: a0 c唔識隱藏...已經諗到..

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sor !!!....e加改左
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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' ]. S8 t- n0 F

" d: J% Y( N, P8 D3 p" L9 }[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:( e/ M9 U5 v; k3 [9 u  [: H
相信e條題目都有吾少人玩...

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, E. S. l/ l/ pPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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1 t; j) h2 ^- R% T+ {Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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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

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, K6 P( \7 A5 L7 R' V, a不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
9 d: W( @6 ~6 W+ x2 B& m1-6 vs 7-12
% g/ j! T* V; ~9 N% E7 \if 1-6 = 7-12     13 is fake+ K6 s  w7 R5 C7 B7 [% G, k; ]

) g8 K7 P. N6 R5 P4 l7 l$ dif not 7 Y% U4 C! l# J" T

6 r2 z0 l0 g) k: L& nWeight the 2 time ) o9 `% ~* Z) ]$ a* f6 I

4 |6 [! {, p3 n5 PSuppose 1-6> 7-12
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1-3 vs 4-6 # _8 Z4 H" z- Z- m$ }

% w9 C# M: Z; ~/ w1 XThen Weight the Third
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6 z. p1 p1 s* _- v. g6 |' I) W# ^" [7 m" p+ A1 _/ d, k
Suppose 4-6 > 1-3
  W' R- G- j2 E# r" E5 {$ r$ P& ?3 q! ]6 j3 T
Just like the first Step
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# V! d" E2 P/ D; ]$ e4 vs 5
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: g0 l, K: _& D9 }; P+ qif 4=5 6 is the fake one " b+ C5 h: V  _2 N  A, Q7 @  g7 ~1 S9 Y

$ n4 ?) s- u5 fif 4>5  4 is the fake one
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3 P7 T) E+ C6 Q8 \4 qand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,47 Q# _9 h6 Z0 E9 m- S( _" E
Group B: 5,6,7,8, r5 e8 P. ?) Y
Group C: 9,10,11,12
: s' v3 `( D. o8 T/ r1 \" aGroup D: 13
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3 Z# c0 F7 K& }: LRound 1
0 I4 n' j" @" m9 AGroup A vs Group B
8 L$ V5 V0 Q0 J* f! d  {- D# E( x如A and B一樣, 即較輕一粒在Group C or D0 x% L1 j8 d7 S, i: P' C8 |
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Round 20 {, x( e8 t9 e. P) Q0 x+ C
再在Group C拆成:) V8 s" n, |* Z$ A0 ]
Group Ca: 9,10
+ q) K; S# [7 A* u9 N$ a. k0 zGroup Cb: 11,12$ F+ C. I# v/ o. o2 k; b1 Q
然後再秤, 如一樣, 即13為較輕一粒.4 p7 s# }" P' }  [% e

. `+ a8 N! ]9 t8 D+ b- v如不同, 即較輕一組有一粒較輕波子在其中,
8 [8 W, e# g) m: ?% f* N要再秤, Round 3, 之後便知答案.
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( }! {  r8 B$ x/ h6 R. oe.g. #1 假設10為較輕的一粒
/ X$ }0 H  P6 U2 \% R( {+ o6 _1 ^* kRound 1; I- U; A# y, R8 w0 `( x
1,2,3,4 vs 5,6,7,8 = equal
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" ], ]7 _6 D! t; Q. L$ ~0 g& ]* BRound 2: F- N5 s6 ~, i! W1 y( ~6 g
9,10 vs 11,12 = 9,10 < 11,12
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, M  w' F5 ~' c  S/ l$ {Round 3
2 r1 j$ m+ Z( K4 |! B9 vs 10 = 9 > 10
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) Z( |6 `, f% T% r6 a4 dThe answer is 10.
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4 i5 p! x+ T( `0 Me.g. #2 假設7為較輕的一粒- {( I# @+ s; R4 b+ y, @5 g$ F! X5 E
Round 1% R" C% \& \/ q2 V& L' |8 @* ]% [
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. z% l  L1 U# I+ a" R4 l/ B
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Round 2
: s" S7 B% U6 x, i& o9 x& ~( |5,6 vs 7,8 = 5,6 > 7,8
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7 V: j% |7 K# b! P$ pRound 3
' D% D1 q4 t  F' B7 r+ m7 vs 8 = 7 < 8& ^& b7 m) G/ I4 _. n# x
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The answer is 7.; q1 @0 `* L* b: ~
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e.g. #3 假設13為較輕的一粒0 H! T6 A$ }4 K
Round 1
, B7 x- r6 a/ [  m$ }1,2,3,4 vs 5,6,7,8 = equal
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8 s5 r, ~9 a. E* h2 m8 pRound 2
# E" H) D& w1 o8 o7 N4 l9,10 vs 11,12 = equal& r! w# O  C# `) L
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No Round 3
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6 W/ d8 x% ^- _8 A& S; C  V, \" \The answer is 13.
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唔知我答得正唔正確呢?! 9 t' r' ?9 {0 b; z
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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 7-12, q  _3 U% k' e0 ]' T8 U4 Y
if 1-6 = 7-12     13 is fake" v7 G& b9 Y9 Q% m# ]/ R4 P, l+ f5 y

$ K. r3 A! f2 c( Kif not
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( h5 H; ^5 P) a# M1 CWeight the 2 time
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" L# r  x3 f3 G- y5 a3 `Suppose 1-6> 7-12
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1-3 vs 4-6 . O; S: _0 p  G6 B8 \' _
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Then Weight the Third
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$ h8 p  V* O( `7 R; M3 P2 i, D2 ^
( [# F4 e1 S1 z- Z% Z2 ?: TSuppose 4-6 > 1-3
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- [, o' _: _. Q/ t2 iJust like the first Step
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4 vs 5 ( k1 e1 o' ~. U6 E/ _

* |% a( G. S0 Vif 4=5 6 is the fake one
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if 4>5  4 is the fake one
' _9 ]" `9 j" B0 ?: h6 H! sand so on......................

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問題第二步1 P5 E  L2 T! E$ G# N0 z' J

2 U! k* C5 Z5 M$ ?Weight 1:  1-6> 7-12
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- \* D. L/ u( l- ]* ], S) L1 DWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ ]# a7 ^! m" H% }& R2 M6 c
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你第三步点去搵 7-12 边一粒???
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========================================5 e$ ~; V6 Z2 a8 q+ }+ ~
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問題第三步
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& t/ \1 H! z) L9 h8 u* y. {/ uWeight 1:  1-6> 7-12
  S6 p1 \+ q3 q/ M7 u9 u
' m, E: s" U% I3 ]7 ~Weight 2:  4-6 > 1-3
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7 i1 M9 Z" {: g2 ~2 v. ^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