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
3 t* ^/ m+ r4 {) Y$ }
1 W. b& T+ W1 o0 @『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)。+ C  N3 j  n9 \* V5 W8 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？』$ g8 ^% a( f7 d: h5 M. x
& u/ z. L" j# g8 L6 [9 s
注意:
4 O9 b6 c7 U+ o* {, K$ F
) H& ?4 C; ?* ]* K$ C1. 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
( r- c! K4 p8 R) m+ v, _' M; M5 w* X9 X8 T4 |( w1 o! {* l" s
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
1 o$ K. r- O4 y7 K5 Y  f* {8 i/ E+ q/ W) A/ V" U2 ]
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ q/ ?: r( N# r
相信e條題目都有吾少人玩...

$ L' [4 G3 z7 f  O8 U- z! z
我以前畫左個chart去答,: J) }* k, P) j7 P% r/ K
等我搵下仲在吾在8 k" \8 ]1 X$ h1 T/ D

8 H/ `5 N- m! T0 z9 y當日用左37分鐘答１２粒波子，差７分鐘才合格。9 A6 [( p- Z, S6 I; \7 W
13.........1 X$ M! e0 `+ A9 m1 n) ]; L% ]& v# M

8 p/ f1 U( N0 ~9 n3 D[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
, a/ Q9 c# J. L4 W
# _- _. _: E7 F- t+ C/ E4 _我以前畫左個chart去答,( ~( v% o3 `9 r8 i
等我搵下...

! A  f' m: i' b+ p' D" V  u& m% P2 U
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:
; h  l7 }! Y: q6 J1 ^  O唔識隱藏...已經諗到..

& z# c2 N: j  v  l, k' e. ?8 Y9 i/ B
* {9 t9 H& P. T0 _" a% osor !!!....e加改左; S7 r/ `4 _. l1 I

8 Y3 ^/ v5 D3 _9 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
6 N5 L% y* P6 }3 g# L# ?/ u8 s& B# a$ {4 Y+ u& T
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:6 y( L* ~; y1 Q) R( f2 N5 Y3 O
相信e條題目都有吾少人玩...

0 P) P9 P4 q3 A! K. b8 W* N' w

$ f, A. y4 g, y2 qPlayPlay, Let me know later who has the right answer and I will add points accordingly.
8 C- d9 H7 j& q  h6 K. }* }8 [* p3 q
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
1 i3 K0 R) g1 S. X3 V) W* e! z% M1 W
1 Y0 N4 Z. i$ r1 H" f
PlayPlay, Let me know later who has the right answer and I will add points accordingly.( Y8 b, C  X. O5 u  U8 i) c

5 x+ j+ e3 B8 M# V, e$ {! |, h/ OThanks

  X3 U6 O$ I6 O0 T: W
+ v( z" P4 h. E( U% i
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
3 |, U' k+ H6 c% t1-6 vs 7-12# \3 y7 g  c" x2 M: X7 E
if 1-6 = 7-12     13 is fake3 S; y8 @  c, `8 F

2 C7 {8 @7 }; O3 q* ]8 Fif not
" C$ J0 v# C) V; F/ q) i# ]& b. v3 o  d# W# Q  j. E" ^8 Z  B
Weight the 2 time * l6 K5 `7 n8 \2 A# ^% D. u. l. ?
5 D- T4 k0 S2 s, W+ {
Suppose 1-6> 7-121 u; f0 l1 y& Q: V( W1 M

+ Z) x3 d7 y2 {" F4 ~1-3 vs 4-6
4 Q+ }4 J! j3 ?" C2 C+ Y; B% Q4 _3 ~& g. Y( N1 P
Then Weight the Third. i2 C/ _" Q1 J$ L' q4 l; `. W4 e
3.
" _3 @4 r: p! S1 k, }
8 }% y: V2 E2 D& y4 B" TSuppose 4-6 > 1-3
, v& q5 W* p; A0 n& a& y% |; O5 Q
( L9 d0 |1 h/ [+ `' j" c1 o: ^Just like the first Step# h6 z1 ^8 \/ v& f9 [7 a3 I6 t- Q) l
6 q  J9 O  Q( A; ]% u* g4 D0 x9 v
4 vs 5
2 |  R& f) \: X0 ?" @' {4 b- Q; Q0 ^1 o0 P# x
if 4=5 6 is the fake one
% A/ K% o" T1 ~5 m
6 k- u3 h) Y/ q1 M# A+ hif 4>5  4 is the fake one
# `( F; Y( p, `% U+ y$ D( w- @/ I' W
7 G: O" p6 e; ^' w" y& z9 Aand so on......................

hello1997

分3組4隻波子秤/ I  z- T  N! }( e/ \1 B
  h/ J/ E$ i! J! @8 [8 k1 d/ w: Z
Group A: 1,2,3,44 U% Z/ k: R9 u2 J2 E
Group B: 5,6,7,8
2 h  c# n7 y! T" O0 j) OGroup C: 9,10,11,12* t. [, @( @6 A. M8 R
Group D: 13
4 H5 U8 X$ ~( ~! v" P# a+ E$ N
# [/ a" c# ~, w. w6 tRound 1
# F$ X  l. v* D) {Group A vs Group B
  E$ s! n+ S3 Q* k  i如A and B一樣, 即較輕一粒在Group C or D5 {& O& m2 N7 ^; u7 ~9 _

. U* N3 u- x( O5 ?Round 2
0 J: \- J4 m; X; D3 t8 h# l/ _再在Group C拆成:
# D: A: H+ r4 }# O1 w: D& AGroup Ca: 9,102 p8 p1 e/ D* {5 n7 s
Group Cb: 11,12
- e/ K  G9 m' L然後再秤, 如一樣, 即13為較輕一粒.. v  G; c: O4 |4 Z8 {7 l! P' M

3 g  m/ o. [6 v* }如不同, 即較輕一組有一粒較輕波子在其中,
% H7 v" \$ v0 m& ]; c" m5 H8 [) p要再秤, Round 3, 之後便知答案.5 x& }) c4 q8 g! ?% z7 m
4 l- e7 c( F' \
e.g. #1 假設10為較輕的一粒
: _5 M8 r8 r+ z: z9 L8 ]! f9 tRound 14 O3 ^- ]: N! j) X+ H' [7 {# C
1,2,3,4 vs 5,6,7,8 = equal
! e3 I+ ^8 V0 N1 K7 u
, l1 F; ]5 {0 wRound 2
9 o, ]9 t6 ^  l+ C9,10 vs 11,12 = 9,10 < 11,128 j. g0 R! X) l  N* N' W$ P8 w
! v" J; V* t7 p" K6 ]
Round 3' W3 N# o1 r. C" S& |* h) d
9 vs 10 = 9 > 10
' e$ t+ {+ X2 Y& m2 _0 z# d( F. F- u/ D4 g( F: J8 z" O
The answer is 10.) P9 M& w' e$ h4 s! L) w' I
6 Z( s) ~  c5 p, _
e.g. #2 假設7為較輕的一粒
' G! |& G8 }9 a! y# q( g; L- |Round 19 F8 O2 x- U0 I) h1 U- k: M
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. l: w: Y/ ~! x' d- l5 M

& x8 Z( e  r$ }9 p! U, ~) b. DRound 2
3 ]4 s  S" L- I0 `+ }/ e5 B7 `5,6 vs 7,8 = 5,6 > 7,81 a# Z  i7 L: {2 O
. N- d" H2 f' Y3 o" ^3 Z. e
Round 3# B5 D* F8 U4 E- o0 v  `
7 vs 8 = 7 < 8
# A8 y& s9 _3 v. W9 U5 x
" O. h8 A* k" C/ ^! |The answer is 7.
/ K) C2 R0 d5 X; }4 f$ W" ~( Q! f, B
e.g. #3 假設13為較輕的一粒9 E, Q, l+ E" L' B3 _2 b" P3 ~
Round 1' c, b" B4 w5 F9 G8 q/ z: g9 i
1,2,3,4 vs 5,6,7,8 = equal4 {, v# e+ j  R

; J6 c& z; E6 LRound 24 ?( @, H3 c2 t6 g% i
9,10 vs 11,12 = equal! O% _3 c, t6 m3 ?% x

6 I' u3 w1 r* @# j( _7 MNo Round 3  {" K( y9 y7 z5 Z: c! n- g

5 N' c, d. e' nThe answer is 13.
# s6 f. T$ `% P3 T; K& g# A+ {5 ^8 I
唔知我答得正唔正確呢?! " |8 I0 r. ?4 [* ^5 ]9 M
' R& R$ U( _# G; J- w1 }/ z) J
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:1 |4 _$ L% @; l4 d* X  c
1., ?* U( B& x8 t
1-6 vs 7-12! d! e% q# U$ L  B- a8 S7 U
if 1-6 = 7-12     13 is fake
. ?; e' o9 e; Z0 e+ m, z/ z/ S1 y5 |( z
if not 4 q( n3 S0 f* ~3 {

" f6 D% V/ T7 Q0 _8 b* o; o' N+ mWeight the 2 time
8 E) v) a8 W, n# h7 d( E
/ m, W1 k* f, k2 c8 }( aSuppose 1-6> 7-12( M6 p6 ~. `3 l0 u6 m# X# c, P

- G6 C  Z: l4 f: P1-3 vs 4-6
  C; X  H9 n. u6 B% o2 I. A9 e9 j
Then Weight the Third9 |. c+ c, |0 m$ T) W! A
3.
+ q/ r) V: W' p# e
. I% I! w8 D. H7 `5 S( A: ?+ N6 e3 s- WSuppose 4-6 > 1-35 R& x& k# \/ j; W; O
" q2 O7 Q& s: U7 j) s
Just like the first Step- j0 M/ u1 `: R5 ?
' k! I$ _& ?+ e- g
4 vs 5
. [% l$ A, ^1 a( c
8 S+ ^7 p/ Z5 H/ c+ E) Sif 4=5 6 is the fake one
9 q1 `8 M2 b6 ~$ ]' G. G+ F: A' Y/ Z2 |) T6 v7 R2 w- E9 I
if 4>5  4 is the fake one
1 |9 H7 O8 r  E0 j2 Xand so on......................

2 }1 ^$ _" D+ Q* Y) Q) I- t; L- i
" Z! w6 G) \4 k* N5 J7 a' t

% `* \: m8 H$ \/ U5 H* n問題第二步
; E% n3 U2 G7 z. ~/ @
. c: |! ~! g- L: iWeight 1:  1-6> 7-12
9 Y$ Q; W5 q; P: ^4 S( ?7 v7 |* A& l% D
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
: E) B; b4 g4 ]( W1 a$ ^: I$ Y  B3 A% G
你第三步点去搵 7-12 边一粒???8 N/ f9 q+ {6 L" e8 J# H- ^
* r& E, h; `3 B1 l& A- O& c' P* Q/ ~
========================================. j4 y  x; W, x9 X6 m2 i# t

. ~# ^, P! y2 n問題第三步
' ]4 m! a  f& D4 w+ C% ?
2 d! F$ X) @4 U; o' x4 h+ V8 BWeight 1:  1-6> 7-12) \& a. o) J% u( w. Y& g0 B) H

* I% G8 ]0 k' J  O5 g3 MWeight 2:  4-6 > 1-3 6 d* k8 C; j% {- F- R

5 @5 u1 Y* ]8 h: ]/ R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