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
, e) x; E) [0 Q. n. ~$ F) H1 [! f+ O  O3 ?
『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)。/ D3 i8 U$ K6 p- y6 s. V+ |8 n" G
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？』7 M! m: ?" r9 E& y8 ~* \1 }
: \) h; q- M3 B' V5 h) H
注意: 7 K. n3 q* Q. j' O, o6 U, Y  X
) h1 @! Q/ J! O  x+ C
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; l0 A" _% P  M* O

0 A$ z2 f. R8 V" l: |: 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) z8 b* Y9 i$ F
1 I; k, P0 z6 D9 I* _
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:- v! K9 [, Z" m1 `4 q- j
相信e條題目都有吾少人玩...

1 C2 B1 }! G$ n' }9 x7 E我以前畫左個chart去答,
1 ], T, k: b, L3 t) p等我搵下仲在吾在& @  j( Y3 L! `

, \, b9 J0 u2 G7 ]當日用左37分鐘答１２粒波子，差７分鐘才合格。5 s- l# `/ G3 a8 d
13.........
. r0 r; z& s' b$ W( C# [, ]
/ h" Q3 M. @+ c8 P6 P" h0 O: C[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:) i  }( R% N* W! p3 f3 P4 J+ {/ F

) f7 B# K/ ]3 T7 K$ V1 w2 x1 s我以前畫左個chart去答,; t/ p+ F5 k3 B7 c% D8 g/ @, ?, I
等我搵下...

. |+ a, s) l! F7 H  ^
$ k7 c& \9 k/ }3 t! s4 m& V, g2 l
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:+ g5 f4 T  C7 X* A) Z
唔識隱藏...已經諗到..

+ ?7 [8 O6 Y/ m7 S" l% L- j( ]" ]
- A5 G8 S# _! i# I
sor !!!....e加改左6 ~2 ]5 L/ x. N% T) `

% U  g5 N  v9 F2. 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
& r5 e3 j5 U6 U' \1 j
& b! ?$ g, T  _0 ~5 u/ k5 Y[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:- r/ G: b7 W/ e* \, t% ~/ [
相信e條題目都有吾少人玩...

7 I% A# ~0 F! ?+ i6 [* X
) m6 [3 i# l- U$ ~$ v  ~- c- I
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
, p/ T. Q( b1 b8 t1 u9 d
& t% m& Y! S5 v+ \Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:5 j- a. I8 P9 M; @; J9 F. P! n7 ~
. u" }$ k  H: r0 r  e; G+ t4 o

1 B$ O' f) ?; P/ I5 i$ [6 @% VPlayPlay, Let me know later who has the right answer and I will add points accordingly.* d& g4 r4 f8 m& {

3 q* `2 \6 r1 V8 h1 S( xThanks

+ r" |/ R# _- B6 v
: G" o8 O- N( v$ m2 o- B  Z- |不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.( k0 V4 v6 v/ r7 W6 K* Z' U: z
1-6 vs 7-12
0 u- K( q. j2 U3 `7 ?7 r- D. kif 1-6 = 7-12     13 is fake+ {. H0 t6 G/ Q5 l* p- g
9 u9 I; g: }3 H0 b% ]$ s/ a; M4 P
if not . L+ U. \  U5 C* t/ Y0 }

+ l4 V4 ~+ Z0 d. uWeight the 2 time ' u5 z: d9 k% N& M
1 C# ]0 l5 @5 d% ]. I% H7 `- g
Suppose 1-6> 7-12
. D1 L2 W" N4 f, N/ ]1 e* S( l& `2 ]# Q  s! A0 O" d, m
1-3 vs 4-6 $ l* l, H( ^. I3 a4 c

0 [; L2 {. L+ {3 p1 O- F: ~Then Weight the Third" Y# C4 V7 s0 J/ w9 a3 [' a2 y. c
3.7 \4 n, v0 [  G  ^* v" D

& l' ~/ X4 \, m/ FSuppose 4-6 > 1-3
" J5 v4 r( j$ h) T$ `& I: C! Y; F: S: I2 C: j' V8 V: y- t  }$ e6 ]
Just like the first Step: ~0 K. ^- H( O8 u, h
( S! O$ G4 l  f. |3 R, d) B
4 vs 5
" w  d3 C! j. ?, [5 L
9 b2 A" K- c7 P, ^0 Yif 4=5 6 is the fake one
; b' W2 v4 i. y0 g- H0 T) }5 W( i& G) j
if 4>5  4 is the fake one
- ]3 ~6 A" A- }& \; b2 O& ]- \4 C0 o5 Z7 Z4 @
and so on......................

hello1997

分3組4隻波子秤" |' U) M8 @$ }
% W, S/ q: N  z( m% a
Group A: 1,2,3,4& }( Q$ z1 {  _# N3 `- J
Group B: 5,6,7,8
5 g- ^0 b- u& D; g8 t7 x8 ]/ ?" ?Group C: 9,10,11,129 g. u6 C3 o1 y* K( g! J
Group D: 136 L& r) S& l' Q" ~) B

) n8 H( u% {( jRound 1" y5 f' ]- X0 y; Q4 U
Group A vs Group B5 V" E3 c' ~  @; c
如A and B一樣, 即較輕一粒在Group C or D- r% f  z, g1 B/ k5 ?) m) w

3 P0 \7 D) d- Q9 R0 IRound 2
- T. u5 \% L5 y* t7 W6 f6 `1 Y( i! B再在Group C拆成:8 [# a5 e5 a0 L0 A8 g. Y- [
Group Ca: 9,10
" ^, B$ k6 Y) y- O, d# A; z; qGroup Cb: 11,12
) ^; b0 U( l0 p+ S: V; q然後再秤, 如一樣, 即13為較輕一粒.$ L5 Z/ Q# i( b

% l: b# `! R+ r' o- V' W+ i. Z' D如不同, 即較輕一組有一粒較輕波子在其中,
* t4 J. c: U5 P要再秤, Round 3, 之後便知答案.: c  B; e- `1 @9 W5 s7 O! l9 r
  K5 p) I5 m1 Z5 C, _
e.g. #1 假設10為較輕的一粒* R) M0 {9 g- P) x8 g' n* N. o
Round 1
0 w* ?/ w7 l% c& |) v1,2,3,4 vs 5,6,7,8 = equal; p! _$ c  s/ F" f# h5 D

/ ]" ~4 J# h9 }7 f+ c/ ?- f9 eRound 2
1 t, \$ R" _( d: `( Y  M1 w- ~9,10 vs 11,12 = 9,10 < 11,12
3 ]4 j. G- B; m/ d) j
3 ^% b9 T+ P- s  O) DRound 3, c: y/ R0 t% V) m. e( ^  \: D0 i
9 vs 10 = 9 > 10: F6 p# [6 V4 m" O  ]  R& ?

& l9 u  \/ Q% Z7 K, N" XThe answer is 10.- F  \/ ^( L5 C' o( y$ y

% N, G2 _' F! ^3 [! w5 Oe.g. #2 假設7為較輕的一粒
% h, F1 c/ X% d% RRound 1; J7 Z" w, Z( T! B, B7 W; h
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
  [/ z0 S3 l5 e+ j5 O& k7 ?1 V6 F$ `6 u0 x% d+ @
Round 2
! G, G8 m( l; c" E) O9 T6 G5,6 vs 7,8 = 5,6 > 7,83 Y7 l9 V/ i  k" {2 u
3 ~* K8 k8 h: }2 I* c+ Z! ]
Round 3+ E; I9 _( I* ^) l, R3 q
7 vs 8 = 7 < 8
* E2 u, Z, o. L1 _/ G1 ]% \  T& H+ @
The answer is 7.
4 Z  O. g* h! `8 a( Y$ C4 T7 S
0 C/ v# s; Y% B% U- Ye.g. #3 假設13為較輕的一粒# ?+ d+ V& N0 l
Round 18 H. a) O6 r- W1 r% m9 c
1,2,3,4 vs 5,6,7,8 = equal
; L) z6 K+ A; q2 D7 F$ a+ E1 x/ P5 c( _/ `6 D) d( D
Round 2
3 t/ J4 J7 T3 f7 F1 o/ k, y) K9,10 vs 11,12 = equal
- A  B0 x. |8 b% ?& h5 x
2 _3 D: R& {5 M3 A' O3 f% }  J2 yNo Round 3
8 l, ]  V% o/ i* o$ f# q; B
: a6 |+ n# D% P$ a! ~5 AThe answer is 13.$ E4 ]4 q/ [/ [0 ~7 J5 C
( H2 U9 Y5 I, g" b1 h" a
唔知我答得正唔正確呢?!
# \6 _9 T0 l' t$ R) H% B5 Q. ?. s2 F8 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:) y. L( r8 y. J3 L4 v% Z  P+ f) A9 q
1.
+ A: D  ]9 I+ ]1 _1-6 vs 7-12
1 H3 B  S( f6 V/ [9 hif 1-6 = 7-12     13 is fake" R* S4 o% B; E" G" D7 u

! h- u2 B- v# ]  g8 jif not
( Q0 _9 x% C* Q! e6 e% F+ F8 P  S
) Y" ]2 J. n1 p& IWeight the 2 time
2 e* R/ q- Q& p$ j* t& q
  w2 C% }$ P6 ?5 iSuppose 1-6> 7-12
( w6 L7 R3 @* m* ~% S( E$ A3 q. Y/ w+ {# Z. d" G1 f/ d" E( s
1-3 vs 4-6
/ C* v) y" F' q
& A% Y3 D+ V( ^: n3 NThen Weight the Third
  c/ @  h; Y* Z7 ?( L( i3.
# J* X0 O" R! n" Z
- m' o2 v- P% g  i# Z2 i# ISuppose 4-6 > 1-30 S, B0 Y! n2 P+ m

" j* r5 v+ Y1 e4 [+ M4 W9 @+ S$ IJust like the first Step
" ]: |: O7 }. Z, w7 K9 o( R
+ j+ L' n7 [+ o& }4 vs 5 , R2 y' V, `* h5 {. t! }  g, ~9 ]
7 d; V! w* \; c) h& Z9 z9 k5 d
if 4=5 6 is the fake one
+ Y3 N# R% U4 O; s( G2 @& I9 ^" Y0 d9 G6 P
if 4>5  4 is the fake one
  R; v( `! M8 tand so on......................

; {+ d! w; }; }
" B2 e3 k) g; x
3 k. w& a* T" e5 J/ B# t1 }+ I
問題第二步
: q# m; I9 S/ v/ t; M1 B. X# S/ r
9 `# R. n6 r( MWeight 1:  1-6> 7-12
0 K/ B7 S% U0 E- s/ o" X( D7 q# F1 n: O  N& W" R
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
7 x- ?6 s2 [4 b# A. a2 \& E7 I: N( Y3 w* U: D
你第三步点去搵 7-12 边一粒???+ M6 X) U! \* r$ }' u

  Z; w8 K/ {6 J========================================/ [3 x# [+ o+ x0 }* S1 x" I
+ M, e+ _5 k- q, t
問題第三步
0 h" j3 }$ o9 V# Y! F
5 F( Q1 ]* P/ o% b) J1 v9 T1 zWeight 1:  1-6> 7-12$ h+ X: L" U3 F2 Q, H* z
! I' B, r% f1 b- p
Weight 2:  4-6 > 1-3 1 ~# Z* O% ?, c

' U  ~- w2 r" o4 H9 p# E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