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
, f9 A0 b* ^" p
! \5 g6 f; g- u' k& U; V5 f7 Q『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)。
  ]- m: ?1 S3 q( X! O' ?6 o- _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？』
( c4 Q& X$ C9 j% V* p  g
, I5 c, j; ~9 S# E注意: ( `* U( e0 f9 d  Y5 S5 s2 x% G0 n# b

+ ?# H! K+ {% z* i3 `; B1. 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
( d3 {( ~7 r1 O' L% j4 ~: @% C2 T, @1 f7 ~
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
! M0 z2 `+ Z% F7 b2 W5 d. c1 j7 `6 o, P+ S+ q" C. w
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:. O3 i/ @' L- p7 b0 M
相信e條題目都有吾少人玩...

& ]) z, E+ J9 N! s我以前畫左個chart去答,
+ v6 V9 T1 z' }: p8 W等我搵下仲在吾在' ?2 E) T" T6 S# u$ S' m
7 r+ u9 D( U, h
當日用左37分鐘答１２粒波子，差７分鐘才合格。' q7 N* z# z6 A5 ?1 R) X8 W% u; I0 ^
13.........
9 a3 y, W& O: E# F9 @- B$ f, Y' M! F" C: n
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
4 ^* \+ e; |/ \; n" [5 D7 }0 z. P- s
我以前畫左個chart去答,
+ Q6 ^+ C) n  p4 Y8 }3 s" n等我搵下...

8 b8 y/ u8 H1 I# E
" ~3 O* s  w2 p' U. W1 }! s5 ~; {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:
# ]/ _/ M' D' \* u/ ?1 h唔識隱藏...已經諗到..

! N' e$ W6 J8 i! e0 y7 i6 {% v

9 J/ P4 p/ l( ]( o. {- Wsor !!!....e加改左2 P/ E( }$ ^; @6 Q+ F$ c6 J& M3 p

- B7 j9 s5 w- L2. 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1 \9 |' A1 x$ D$ u' X

  C/ j9 Z" ]; \" X8 P. 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:3 x5 J# q0 v4 Y% G; h
相信e條題目都有吾少人玩...

$ x) o& q# [' F& b" g4 q; q
& D9 p; Q( r2 O& |+ S
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
5 Z) W6 S% I4 _* j4 f/ w. g7 D+ t& ~/ Q7 F, A
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- f  Z7 o, K! y! M% X1 H

5 [4 U' ^! n4 W4 X
- X" n* H( y; `+ p1 _* ZPlayPlay, Let me know later who has the right answer and I will add points accordingly.) J% {" ?4 g, D. G4 d0 {, K
& J! {1 y8 v( X: Y9 T! k( S
Thanks

6 n  T5 h4 b& k' f5 l3 |

4 s2 I. {7 s0 W" @不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
: \1 a& g/ z7 M1 }' l. ~3 l  l1-6 vs 7-12
$ Y& B  o8 _- I2 o9 v: oif 1-6 = 7-12     13 is fake7 p3 o0 A$ G8 N& `9 ^8 H8 N& ~) L
. i; M! Y: i4 `4 _+ e4 Z
if not 2 y1 ?+ D7 u; s6 d7 R+ L, l  j4 D

0 m3 @* A5 h! ^Weight the 2 time
% C5 d/ V1 a+ i% ^
1 x5 I6 |( b' l7 |5 l' lSuppose 1-6> 7-12/ R! Y, g: ~; K

0 t6 D  b$ K; [1-3 vs 4-6 : Q% ^1 `5 [. d
% l- j2 I4 _% A3 v- Y% v
Then Weight the Third
% o% t$ T. l/ E& Y; u3.  i8 |) G. G  M0 \, }
( z# e- `9 [7 M: A; M7 H4 q
Suppose 4-6 > 1-3
- N5 u2 K" P. F( R& m
7 I8 v; }' i; {. k3 R- @. QJust like the first Step, }! K# {0 G. S% \1 v: r
  e1 C+ r$ ~: |
4 vs 5
+ M; C" F5 A; G/ E5 ]9 |! _, n: y. U" c
if 4=5 6 is the fake one
! d* b$ Z6 ]% ]# \* @
6 e: t6 x! _. H! [) Z  Mif 4>5  4 is the fake one
, ^8 r+ G, \1 v' Q) L/ t8 ^' C/ b$ ^
and so on......................

hello1997

分3組4隻波子秤
2 G% {) n% |+ I' s, q4 ^$ X6 E0 W5 k$ p
Group A: 1,2,3,42 J* |, B, @/ u4 U# X
Group B: 5,6,7,89 z0 e2 x* c' |3 \
Group C: 9,10,11,12
/ v$ y% B) ^  V, V1 [Group D: 13- c2 e* a+ p' o4 `8 D# {- ^' E
' @2 [/ Q7 N# ~  ]4 \. f
Round 18 q% `. C: Q* ^
Group A vs Group B- I6 z5 ]0 R4 L+ T! S; R5 f
如A and B一樣, 即較輕一粒在Group C or D
- y# E* \4 e1 E! |  G0 l1 `1 k4 H2 I' s$ R
Round 2
& [0 ?  D) ]; D) W再在Group C拆成:
' b2 H) r. l. y1 l' tGroup Ca: 9,10
; x2 V3 x5 L( vGroup Cb: 11,12& C9 j6 V1 _4 P) Z2 {3 H) U% V" C: f) S
然後再秤, 如一樣, 即13為較輕一粒.
+ v* ?* h3 a% L0 S7 P9 A$ v
" b, W) v% l1 i3 K! D; f5 a' x如不同, 即較輕一組有一粒較輕波子在其中,
; ]- i: _, o) y/ S" k4 M/ M4 b5 f要再秤, Round 3, 之後便知答案.
3 n' C# n1 V! b0 ]  b- N5 L3 X7 w: B7 X
e.g. #1 假設10為較輕的一粒9 E& q7 {9 T; W  G) W9 `
Round 1, c0 i, b( g7 t# D0 O
1,2,3,4 vs 5,6,7,8 = equal
; K2 }. ]$ `1 {8 D5 {2 h( j
' U: g+ @3 y3 Z* i( dRound 2+ w" _2 }% C# t- G' `
9,10 vs 11,12 = 9,10 < 11,12
8 \4 F( B: o1 ~
% Q3 r$ G. g/ |5 jRound 3/ p3 `! ^1 \" k5 B0 Y
9 vs 10 = 9 > 10* b' D8 N, l( j  W3 v
" S( A3 W8 |+ ^" }0 f: l) I
The answer is 10.
/ f5 M& ]- M$ \. }/ A5 Y* j4 x
* n, \( Q. H. v, W2 t) q2 Ke.g. #2 假設7為較輕的一粒
3 [% p6 Q9 G+ B1 n4 B9 MRound 1
2 A' k% J( Y+ ^( N0 O+ @. Q4 i1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 p5 N  A" d( P9 \' T. \, v& L% \

% L$ d$ q5 t% a* `Round 2
4 L( [5 \) p' T. R0 z; T1 _5,6 vs 7,8 = 5,6 > 7,8+ O( v4 T$ I" X" o

. \6 v6 v. @- g0 t9 {. T3 f  m7 GRound 36 G$ q& r; w/ \2 [1 ]6 E$ R
7 vs 8 = 7 < 8
8 Q- _! ?) p$ \( k! g4 c4 w
* h4 K1 H# S) n8 N; Z" F" z. [The answer is 7.
3 u1 [, z% N$ K& s. F3 {( t" }
- `+ @7 S0 ~0 R; |2 ee.g. #3 假設13為較輕的一粒
" U5 U7 P* E7 v0 j7 o) VRound 1
" N' l" O+ E! q1 E" a6 P1,2,3,4 vs 5,6,7,8 = equal
! D- i8 F  [& i0 N; j* M2 U/ ?( G3 _8 R8 ]1 p* Q
Round 2# G, H/ [% p4 ?2 K
9,10 vs 11,12 = equal8 O% W+ N  Z) M

* W# j2 u. z/ {No Round 39 D1 w1 ]. E0 M2 u2 F% S
; @- ~+ L$ A% u1 t
The answer is 13.
6 M$ b" m3 q+ q4 i' ?
: l& g* d* F3 \, `( g* F唔知我答得正唔正確呢?!   A+ @. K+ M. Y  t4 V
4 [5 |2 f! c7 r7 ?, X
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:+ i. u- W" h1 p1 j7 l4 i
1.* Q; Q$ \" Y7 O  q; F
1-6 vs 7-128 V# t) x, n9 x9 p$ W/ T9 d; [
if 1-6 = 7-12     13 is fake8 v4 S' c. b) {) n9 j/ ~+ [. }
" P( |1 B6 ]2 B
if not 3 D  V# v. S2 j6 j

. ]; Y' p6 d/ sWeight the 2 time % p8 Q* Y( R0 {' F) `3 B

. |! F% Y# I: d  @- G; n+ hSuppose 1-6> 7-121 f3 ~; o+ `  u! f6 H& |! J' x
  a# O: p* i# i3 C* ?" X8 b0 i
1-3 vs 4-6
0 _+ A4 H1 @' f8 P3 B, e8 b0 I7 I& Z6 O
Then Weight the Third
3 Z! R2 w* V2 d; F* ]3.* d' y( o+ d  H. Z
" }' V- ?5 g& Q( n# I% p# r
Suppose 4-6 > 1-3) R2 H2 ]4 v$ k" L, R* j

. @: M+ n9 x: L( N: B/ i& pJust like the first Step
  Y6 {* G- U! c* B2 h/ e: `
  H; W5 I5 @( i, W4 vs 5 / ^; T; V! s- k; C, N/ F: j
' S5 B5 K# |2 @0 q. c
if 4=5 6 is the fake one 1 l1 R: `  D8 A( n4 n& y, n
/ a! M5 T5 w3 D) }& f
if 4>5  4 is the fake one
& x& J' u5 [' A2 Oand so on......................

% I1 B' X  o! t  p- I
  ]- T" X6 e. E2 w3 J  U5 @% k# ^

, X% D8 D8 G, g$ {$ `, h; V問題第二步
1 r3 h5 w% y( W6 F5 C% x! M; p( l4 S8 e
Weight 1:  1-6> 7-122 O% \7 q* x2 p: r/ i# f
, \* A. P" O; _6 f# q# G5 i: D, g
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, s0 g: r5 H8 d6 [: v- n  s, }
9 P1 c) T4 N0 V4 Z
你第三步点去搵 7-12 边一粒???" U4 f' U6 f" j# I$ ?9 y

; a7 Q- ~5 l, X  w2 |& i0 F5 Z0 K3 u# G========================================
' U. n- T0 B+ C1 F: `6 s# S5 Q. M# g' k- v7 F1 @; C
問題第三步0 e" F3 V2 \: W0 R5 A, W
* f; S0 _; n2 g
Weight 1:  1-6> 7-12
3 F6 S& A  u5 B+ Z- l6 Y
3 v: z2 p& ^$ F9 \Weight 2:  4-6 > 1-3
$ _) L! Z7 V  ^. v6 U0 c: H4 v
% t4 L& `  |( l  l! b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