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* @- X# }; `1 h9 e9 t
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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)。
& e" w) Q0 R; ?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: ) A+ {1 ^6 _0 m8 e; j$ F

- v9 f* G' L( ], |$ g- W0 r4 n; n1. 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, l/ _! S9 Q+ o: m8 W4 \4 \/ V. ^7 H
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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
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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:
; l. n2 I' {: N! h相信e條題目都有吾少人玩...

( h3 Q5 \: z# l% F4 S/ x- L我以前畫左個chart去答," E/ Z$ n: k/ h) i: I/ W
等我搵下仲在吾在5 ^5 x7 @( f- H4 i

( t8 ]( ^5 A7 x" R3 o+ j4 Q當日用左37分鐘答１２粒波子，差７分鐘才合格。
% d! m. ?: A. J3 i13.........
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) U& F! j4 z5 P6 s[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 [; C3 u$ \5 M/ @; n# \0 ]- a
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我以前畫左個chart去答,
! P& L+ [  n& R& B6 N, ~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:" m9 J# m$ n0 I/ N% {$ @4 O
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4 \- S9 V. j' b4 Z5 t1 B- e

1 _% p6 M# h- Y( d2 [[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:# P' y- J9 z3 T+ @/ N+ O, ]1 I
相信e條題目都有吾少人玩...

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4 x  Z' m  F& [; x- D) YPlayPlay, Let me know later who has the right answer and I will add points accordingly.+ z  M  s* n( T( }7 x9 k8 Y: ^2 T( K7 d
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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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0 q, E( o- @& v6 p3 H, @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
6 ^6 u6 O8 Y' R5 C7 ?# W: I$ W* ~if 1-6 = 7-12     13 is fake* G3 }) t. U  t& d. |

7 q/ y7 b0 ^, B% h, O$ M) Wif not
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third1 c/ h0 G7 ^  O' v) x9 \* S7 J: v
3.: q# r+ w" L3 U  ^" X3 I1 _1 W% {

0 p# x, j3 I. g0 j8 k3 KSuppose 4-6 > 1-3
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+ G) ]0 \6 n9 ]Just like the first Step
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4 vs 5
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9 I6 Z- n2 W' f% f; Sif 4=5 6 is the fake one 6 G1 s+ L7 }9 _
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
- D- @; O( \$ q9 iGroup B: 5,6,7,8
, ^- a! I, l& Q2 wGroup C: 9,10,11,12
, r0 N% s4 L$ m. j$ d( pGroup D: 13
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/ _7 e4 B4 Q& p+ B$ K; |) ?Round 11 ]" c( P  A( n+ o4 C+ n) @
Group A vs Group B
. S1 A- _. X0 J: w如A and B一樣, 即較輕一粒在Group C or D+ L& E9 g5 W( @2 D, L
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Round 2
! l. t4 `( ~. K' ], e2 v, Q& ?7 _再在Group C拆成:
- Z0 v# ^! }6 q- |2 F3 TGroup Ca: 9,10
& ?7 l. D$ Y% kGroup Cb: 11,12
  @2 X3 N8 F/ u0 ~然後再秤, 如一樣, 即13為較輕一粒.
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* D0 R4 h$ [2 r/ i: y& s& N/ a: j# r如不同, 即較輕一組有一粒較輕波子在其中, " t  `& g8 l6 o
要再秤, Round 3, 之後便知答案./ r, s9 B( ~1 \! M

% {- b$ s  [$ m0 O, c+ ie.g. #1 假設10為較輕的一粒; [* E" M* q# `- O& h
Round 1" W% `; S. e- ]4 v' ]2 t/ J& {
1,2,3,4 vs 5,6,7,8 = equal
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Round 2: V- o% |2 H. h% N* ]% [0 X  j. Q
9,10 vs 11,12 = 9,10 < 11,12
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, k! Z7 H! [3 t! S) @  D' K$ S/ WRound 3
6 F+ Z9 [3 w( \9 b$ ^9 vs 10 = 9 > 10+ ~: A! k8 g/ U7 G

8 E, j5 p) s  c, Y6 A- o$ i+ bThe answer is 10./ s( u6 T: Q% L. Q" H& [6 M4 T8 _

+ _) [) u4 F- x7 v( S8 Z% g) Ie.g. #2 假設7為較輕的一粒
2 o# U* ^0 V. K- ?: wRound 1
# [* b% `' Q  R  ?2 U" \1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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% Z" U" d: M2 L* N2 mRound 2
; b6 F& j* L) }# P+ @7 D5,6 vs 7,8 = 5,6 > 7,85 y1 \8 s  n- O- `. [; Z
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Round 3
  l/ R( Z( m+ W" N. e8 j7 vs 8 = 7 < 8
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The answer is 7.7 f% ~  K1 t4 a

/ ?9 s# {4 @, c4 ~e.g. #3 假設13為較輕的一粒# k: v+ A5 E% R) s3 _
Round 1' B# D9 I/ O7 R% F
1,2,3,4 vs 5,6,7,8 = equal# W, N/ ]) g4 e- C' p* y/ u2 B
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Round 2! k! C9 t+ F: U- `; f9 N
9,10 vs 11,12 = equal7 j; S" [" s/ E3 f; e0 S7 ^

) P6 q3 {& ~5 A% C$ @: T' XNo Round 30 ]- |, ?1 i5 [/ H' j* {# s
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The answer is 13.$ S& L$ r* R! ^( H! q
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唔知我答得正唔正確呢?!
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9 P4 F. X7 h: @7 h3 Z, h[ 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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7 x5 K$ o3 d. G3 w1-6 vs 7-12
4 p- N+ _, I3 G4 |if 1-6 = 7-12     13 is fake3 [8 a' |7 A7 J# v4 p' l

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( t- m) v1 J0 _( k8 N& ?' P) z3 f# Z9 EWeight the 2 time   V% M% ?! Z% L  n

# [" F; h, r7 P& `" i" f6 }# CSuppose 1-6> 7-12- X$ l" Z' T& [% K( J, E

  e1 L4 v+ C* {( w. {1-3 vs 4-6
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Then Weight the Third% f6 d3 U3 M& l+ v
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5 H. O3 u4 ?4 h3 r( H+ ISuppose 4-6 > 1-3
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+ _1 D3 a2 k# J' g  K  i! R5 nJust like the first Step: m8 ]7 x+ {) c" {

5 @0 S# j0 U; _4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one * z" M8 r9 e1 Y7 F4 U
and so on......................

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, r8 w* `7 p  |+ I) {問題第二步
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0 ^, X/ w! P- UWeight 1:  1-6> 7-12
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  h6 G) m7 i- ^4 t5 J( z$ sWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6- Z: L( w' W4 c

9 L( z& t/ f5 g" r& E3 E+ E你第三步点去搵 7-12 边一粒???5 B# @" Q$ \% `8 A3 w
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========================================6 T6 S0 [& {. X' F

) K3 m. ?# G7 z1 A  j" ]. ^  q問題第三步( Q% z8 z( w, Q2 d$ t+ W- ^

# l5 p4 U0 j8 R  {' bWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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$ X) [/ i% O! A2 b: 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