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& @# J+ l! D7 y4 [1 C6 D# m0 @3 V
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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)。& p5 f& P, y$ b& A# [
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？』: b. e" s: W% D

* m3 ?0 @6 j+ J  e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
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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0 x9 Z/ @" Y6 q7 P" b  e) s
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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 21:34:7 C# c. G- N3 o2 _( M1 d, Z
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,& ^$ k. A9 k( h4 [5 p
等我搵下仲在吾在+ g* m( a2 P4 p* `, x. E
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
" ^! N, L" W; S; h; N& w13.........5 t7 v3 m+ ~- V1 h4 e# _8 X
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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:$ s) ~# R9 A! T# u9 u

* O1 j3 `! `1 U! n/ ~! t我以前畫左個chart去答,
: Y* L3 e/ z/ g- U" M等我搵下...

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' S9 ^1 r8 `+ L5 n! A! S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:  w5 m$ G  f, g! S9 P! X/ f
唔識隱藏...已經諗到..

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sor !!!....e加改左9 o6 o  _$ {0 r$ S# f- x

: M7 A7 q7 I2 e2. 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' k2 b" M4 i  W

$ J8 Z. u4 H7 M( H& _, H[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
2 y1 S6 w3 E" p0 D0 l1 x2 Y相信e條題目都有吾少人玩...

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4 n7 O1 B& D( s! a: X! dPlayPlay, Let me know later who has the right answer and I will add points accordingly.$ x, z! z/ Y7 Y! |7 [9 N
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:8 I% q0 k- T9 I1 J/ L+ ?4 M1 B

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.) e8 y- Q) W8 v6 K' q

* i/ R+ B, b& I7 r9 \9 K( JThanks

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' Q: h& N( b0 b: W9 A不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
- I  b% B$ a1 \0 [# J1 y3 E( d1-6 vs 7-12
3 Y0 t9 _2 L  A2 L1 s) N) ^0 `if 1-6 = 7-12     13 is fake
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Weight the 2 time : p" C) |. t  G. q! G$ U! d

5 h( |! l" I5 e( c" I9 rSuppose 1-6> 7-12& {( K% i( P, ~2 a3 q: f5 P

! D0 n0 \- s  \; ^" O1-3 vs 4-6 ' u7 k6 A) ?) e% x6 R9 L3 k

* S) ]4 a( @" V1 m% I' RThen Weight the Third2 a4 C6 q  g8 w
3.
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Suppose 4-6 > 1-39 l4 B& b& p- S/ ^- E8 X
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Just like the first Step
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* ^1 l) _+ C# B7 j+ J% u8 @; \4 vs 5
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& [! D" m5 A5 q. j2 A" bif 4=5 6 is the fake one 7 m" |5 L8 Q( q  z8 K# g

/ H6 O! G$ p/ @+ Nif 4>5  4 is the fake one
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( k( @' z" A* L- ]- A' `and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
% h9 l, Q+ S- E" f# A8 RGroup B: 5,6,7,8
; U1 r0 u' m: V+ r5 v9 ^% m2 JGroup C: 9,10,11,126 p# |+ e3 `6 u; k
Group D: 13
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Round 1
+ {6 H+ ^. J4 R4 A' @2 vGroup A vs Group B: g6 K$ T: L% h9 k: ~& ^
如A and B一樣, 即較輕一粒在Group C or D1 D3 r/ I9 t; |8 U* n7 g

; q7 j( x  s5 R" F) K9 c7 n6 aRound 26 x9 E2 I8 P/ s5 m; H
再在Group C拆成:3 p( L' C& h9 F8 ~/ X
Group Ca: 9,10% ^. p% V/ r; V( c# a& n+ Q
Group Cb: 11,12
7 u3 {* e4 x2 @% W然後再秤, 如一樣, 即13為較輕一粒.
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: D, c. e) \% A6 Z7 N4 U如不同, 即較輕一組有一粒較輕波子在其中,
6 [- Q" g$ T9 Z; r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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1,2,3,4 vs 5,6,7,8 = equal# `6 H9 c1 W2 h) I7 t. }

8 b) \3 o& U1 _* k. `Round 2+ A6 B( N' i' \& W- F6 p
9,10 vs 11,12 = 9,10 < 11,12& L3 ^% k  E0 w6 y  b
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Round 3
: G9 u! ^# @9 a  b9 f9 ~9 D* Z7 k9 vs 10 = 9 > 10' F( W3 y: f6 l$ l- W5 W

* \& Q% q- v6 Y: `+ ]The answer is 10.
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8 K, F2 b; j* ~1 E5 i/ {e.g. #2 假設7為較輕的一粒
, H7 ~; Q5 V: k* G# oRound 1
  I% G( `9 H5 n1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% N7 t) d" B. B( n% m+ ?: P

5 P  y2 B  y# U$ yRound 2/ H, d3 ]9 Y- T  o: ~
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
) K6 \2 e8 q, W8 Y" M* }9 Q( i7 vs 8 = 7 < 8
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. D% t& B/ T2 O: {& bThe answer is 7.
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* ^9 F: ~  ?' W9 me.g. #3 假設13為較輕的一粒7 i( J) f* x/ A/ F2 y
Round 1  Y5 x5 u8 b6 ?
1,2,3,4 vs 5,6,7,8 = equal4 G  S; ^2 u8 `0 m1 u

# ?) {% U+ c8 E( ^Round 2; @: [5 k- J' w
9,10 vs 11,12 = equal' |& ?6 n' z8 b
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No Round 3
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3 o5 m5 H8 \3 W8 S  mThe answer is 13.
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2 @: t1 c0 l. y1 f% w/ l唔知我答得正唔正確呢?!
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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:5 z( V/ [* G: g( e( k2 z+ Q: R
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1-6 vs 7-12
& D# h& n9 o. s0 J% Nif 1-6 = 7-12     13 is fake
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1 m. {( @5 N$ Z  D  B& qif not ( _( d# ?1 v# Q, D# s: V/ T5 Y
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Weight the 2 time , V+ }6 L3 b& b7 T. E! K! J

: e; Q6 k+ P, T7 l# E  W2 ~Suppose 1-6> 7-12
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, @; \2 D- C- A+ z5 x1-3 vs 4-6
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  b+ W7 @+ \# j- J, z; h# j" e/ yThen Weight the Third+ c, P( k) j& V4 W
3.  a# F+ n( y: d) r  c) ?
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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 3 D9 q) U! U5 M8 ^3 f' l
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if 4=5 6 is the fake one
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, j& g/ N, x6 T7 S( _0 x7 ~" uif 4>5  4 is the fake one
8 Q8 L" u8 E2 A0 \& I( _6 c7 G: @and so on......................

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+ g( t# N+ V' ~' k" b問題第二步* W  E, E* e* [; c9 u
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Weight 1:  1-6> 7-127 {7 C# j( E+ _, A

& S2 B, w, }: P5 FWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6' d( a" M" ?: I2 V) m

- ], l6 o5 X1 Q7 u你第三步点去搵 7-12 边一粒???* g( e+ z9 v+ C2 C/ ~* E

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, s- B$ `! M1 J/ B- T! V, u5 j& z問題第三步7 X. x5 d) ]4 d* U5 G: a
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Weight 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