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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& V4 a+ Z, W. T% a9 J0 T『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)。' N& ~  W: V6 U. W# r- ?. j' }
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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/ f6 ^3 f, a, j2 ^" J; W# u注意: 0 W' e2 I9 o8 D0 f$ C
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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3 C5 ?' k3 Y3 t; G1 y% Z

- I7 J+ s. [( H* V! e$ I2. 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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! T7 r# K0 e' F; t* l  M, e# g. Z[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:* ^; p" J8 e, G6 o  u7 k9 b
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,; O; J0 u! F4 R/ Y( q
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。' N2 W6 {) j8 R$ P! Y+ {$ ?2 u6 [
13.........
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: a7 a( A2 A# Q[ 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,1 W, K* q6 v; b0 a# k; }
等我搵下...

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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:( \1 }  Z8 I3 g( E9 b; F4 |
唔識隱藏...已經諗到..

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sor !!!....e加改左. }& a# `; }7 U; ~# e
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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- u/ n4 L5 q& u6 K4 C

; A- h) Y9 i" A7 `+ s, P[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' Y& n' d- \$ C9 Z
相信e條題目都有吾少人玩...

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" ], g$ t8 f; L* |9 SPlayPlay, 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:
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3 v2 r2 N2 m& T& Q  c  _PlayPlay, Let me know later who has the right answer and I will add points accordingly.- J9 g2 @# ^" _- c
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Thanks

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- m% t% w1 f) }& @  y不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.6 I5 B  [7 O! m
1-6 vs 7-12
# @4 E  X. E: @  q9 x; [# Cif 1-6 = 7-12     13 is fake2 n5 }' d- D" ^% m

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Weight the 2 time
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Suppose 1-6> 7-124 d, T* t& ~+ M+ Z
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1-3 vs 4-6 ( [: {* ?6 Y: F9 i- o9 U- M. d6 }

4 g4 B( w( j  y! b) y) pThen Weight the Third
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Suppose 4-6 > 1-3
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6 e  Z# r" v2 o$ Q( n6 J8 KJust like the first Step, s, S* ^% t- Z6 E; X; M

0 a# k0 l5 R# w3 m' N* b5 q& V4 vs 5   T9 ]" A* {4 N7 L
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if 4=5 6 is the fake one 2 w* [% l% W7 O8 Z  K1 g

) a& J( L9 A" e% K8 j1 Z# {/ xif 4>5  4 is the fake one 1 A2 ~2 a# L* \: s# D" {, V
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and so on......................

hello1997

分3組4隻波子秤
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! G0 r8 _" V7 U  }Group A: 1,2,3,4
- @0 N/ ~" Y% g: r  jGroup B: 5,6,7,8
! p/ w+ S- e) P8 n4 ~) y8 D6 gGroup C: 9,10,11,12
1 p) L/ d/ |! j; N6 xGroup D: 13
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Round 1
9 ]* V( i6 b" ?) k  }9 jGroup A vs Group B
* d- }+ m) o+ ^: C5 _如A and B一樣, 即較輕一粒在Group C or D4 ~5 I: w- A, Y6 j: `1 D

& i( A5 |9 v. I& f) y9 H, u1 XRound 2' E6 N( p. d4 x! ~
再在Group C拆成:4 ]$ v7 p2 A  \6 X; U, k' l0 h
Group Ca: 9,10
, E$ j5 H8 b$ ^: X* m+ {) Y$ xGroup Cb: 11,12
& x  Z3 B$ U5 v+ Y然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,   t+ e( b$ N' w) m3 N+ S
要再秤, Round 3, 之後便知答案.9 [" b3 I& K: r) {" L
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e.g. #1 假設10為較輕的一粒& r& c9 {/ r% c# _4 t) }
Round 1( T% V6 D$ ?) \
1,2,3,4 vs 5,6,7,8 = equal! B! S# ?1 y% S" i" n% C5 J2 X& V5 K

3 Y* @' }, l6 k% yRound 2" _* @; Z. _& ^* D6 N* L
9,10 vs 11,12 = 9,10 < 11,12
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Round 3$ `- S6 |8 {, p; A
9 vs 10 = 9 > 10( a- B+ p; q9 Y: u% o

( o: _6 x' I- DThe answer is 10.7 m) u* N$ r% _) C- i6 G
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e.g. #2 假設7為較輕的一粒
  d# B) @+ `- b2 uRound 1
$ K0 D9 f0 c! W) H$ {  s2 ^1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
0 H$ L7 w9 E' |: A! s5,6 vs 7,8 = 5,6 > 7,8
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+ C; A8 j5 ^; b4 [  c9 @$ DRound 3
1 [7 F) ?; B. \1 i% w% i  M* U7 vs 8 = 7 < 8$ w/ V) r2 p4 @
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The answer is 7.
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9 a3 B( B1 [4 S& W, Ce.g. #3 假設13為較輕的一粒" H) o7 {: ], }
Round 1
3 T3 Q+ o3 Z( k. m. a- @1,2,3,4 vs 5,6,7,8 = equal* v! I$ I3 D) W0 K

5 H/ [* A. s: SRound 2
! q4 m. n1 c+ X, f& s$ J' x% t+ {9,10 vs 11,12 = equal
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4 G" o7 P2 V. T) J: }( \% p* v1 `No Round 35 N9 j" s, k, g+ X
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The answer is 13.
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唔知我答得正唔正確呢?! ; C8 ^  |5 z+ A) Y
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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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6 D9 k. I' _& @1-6 vs 7-121 G7 L1 w) Z- e( ^
if 1-6 = 7-12     13 is fake+ t5 T: x: g0 z8 G  }

. I1 Q9 r) U; l# ^6 w1 p. q8 sif not
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9 }, }+ r/ I- d( W+ M( SWeight the 2 time
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4 S5 X9 o. r( ]# q( pSuppose 1-6> 7-12( A5 A' }5 \. H; E. ?) ~

6 Q3 V( _% }' ^0 S# p( f1 s; G1-3 vs 4-6
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9 h$ B! P. I3 L' |( yThen Weight the Third1 H2 B$ @+ F% Q- k! g# M1 x
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/ p% f- @$ D$ u" lSuppose 4-6 > 1-3
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1 A) r! ?- C  z* e* _+ M+ DJust like the first Step3 V7 I6 @3 V- {7 L/ @

$ N1 G9 w1 B& E$ B) q% f# A4 vs 5
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if 4=5 6 is the fake one
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$ S2 Q' y7 ]6 [' V1 v2 Yif 4>5  4 is the fake one
  L4 t& W. \, p4 K* ~/ D3 ~9 s0 H. S9 Wand so on......................

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- C& t# n, e! b- y6 o3 `問題第二步
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Weight 1:  1-6> 7-12" ^% S* W( q2 p

5 e1 E& z, ~: v* {0 ~8 D6 A. gWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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6 f; K# i1 I/ F' ?: \你第三步点去搵 7-12 边一粒???
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) e" F7 r0 U' H1 q; D& w! E========================================
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1 E) x% y) a/ p( V, c4 a/ c6 }問題第三步0 t( E. B& l( ~5 @' Y! B2 J

* q) F0 U/ F4 U. z, D  r- V$ lWeight 1:  1-6> 7-120 W8 G5 T# j8 C. p

0 Q3 q- `/ [4 Z, r5 _7 m1 WWeight 2:  4-6 > 1-3
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$ M( l! K" T( `. G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