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
, ?' x3 N! x7 a4 G% l0 P$ ^$ U3 t! ]9 Z5 ?' Y: ~6 ~+ L
『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)。
6 b- V1 {2 K4 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？』
" T7 F( b' x4 N& }# U) M- Q# I" ~) e2 N' l  e& U/ V; K- I0 X
注意:
- ?/ g# u- h) R
# v! R( k7 P3 x+ X1. 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
$ K1 E' o/ O0 M0 q0 G; @# s; w2 `6 x/ b$ z: ~  b
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
6 d: q6 c: T( m2 L$ ^) }
7 D3 v" E" Q& f) W: ~[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
# z8 t( b( C3 u  p5 U7 X相信e條題目都有吾少人玩...

) g. l! q2 I) \. K3 x: a
我以前畫左個chart去答,7 ~8 d* M1 S# a1 s% }3 \  q# `
等我搵下仲在吾在
* _) o% I& Y$ `1 }) ^
$ e  P) E. p" E+ u, `* Z+ I當日用左37分鐘答１２粒波子，差７分鐘才合格。# {) L8 E% a8 U' ]
13.........
, v9 J7 W4 s/ E* T+ @5 Y
) f$ ~6 l  h! j& v* 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:
3 k6 a0 t5 ~9 T& X3 ^& ?6 _  o3 o6 ?; V. e& Q
我以前畫左個chart去答,
7 V1 s# v  t+ Z4 _8 _1 H" C等我搵下...

4 U% L8 d$ D* x: N
* W% i% x( M' Q4 o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:
' D; V) {7 r( M3 m2 `+ B唔識隱藏...已經諗到..

2 G( a2 n" `; \& J; V! M3 [/ i4 x: c9 o5 B) e6 j6 S- d
sor !!!....e加改左
  |8 J# M/ P9 ^9 E' Q4 l6 R9 o$ R1 B2 d* R% [2 ~: k
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( c/ C! T' A  `8 B
( n" F  l& _' i, C0 z4 o# G, w% b3 v
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
1 \9 A5 Z/ v: [; L5 l相信e條題目都有吾少人玩...

3 `, j' ~4 _/ E7 M+ U; c2 k
! B( x' q9 N! U# }
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
* H& ^5 r* m- m8 h2 f9 z) S$ o: r* q. u. l: ^
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
0 l6 b' J* a, i* u- O
! }8 H' @* F7 o  Y- V
+ U$ Y; Z3 Q5 l6 n* H- j  ]* @PlayPlay, Let me know later who has the right answer and I will add points accordingly.$ O3 E$ B3 o$ [; b, W

9 z: C" n( `  q2 IThanks

0 z: r. h+ }2 q' B, ^; A, ]
9 ^9 [8 T5 g' W" {5 S
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.- q6 ?. f5 S' a! w: X% x6 p1 C2 ?
1-6 vs 7-12
1 P' ^5 z9 p0 O( H4 uif 1-6 = 7-12     13 is fake
. L% J  j* N5 O# j7 e
: Q/ i) V) B9 g' q: Mif not & v4 F0 R0 ?* |

* D: M! Q9 l+ _4 ]& J4 vWeight the 2 time
* w4 a4 W- o% `* }# |
3 _0 |& X8 Q2 k0 \+ ESuppose 1-6> 7-12
9 y* f0 X5 f" Q
8 U( D+ S5 d$ o( G- p1-3 vs 4-6
- }  A3 s3 `9 n! v( v
4 J- x: m% ^" d: G' \% u3 rThen Weight the Third0 l/ P$ g4 T% Q3 k
3.
: I4 g* m9 B. Q
7 @; h; W9 J* E: F0 tSuppose 4-6 > 1-3) J& m( b5 o0 P# \: j: S8 l

+ }+ [- A2 @& ^; kJust like the first Step; Z9 l! q+ R0 `
9 j* u4 d4 f2 Z$ s
4 vs 5 + ~- n( Y6 c) Q5 }# b6 T
0 C9 @5 G9 x+ ~$ x* L1 r
if 4=5 6 is the fake one & o. \* g* r  \' a4 P

& r9 R- M5 E- v+ r6 R2 yif 4>5  4 is the fake one 4 p. _& W5 S8 p! S. x
) P  {9 T* U& s
and so on......................

hello1997

分3組4隻波子秤6 I3 C1 S6 v0 y8 P  c' k
' ^2 H$ g8 s9 W" X# Z
Group A: 1,2,3,4) {% D1 i7 Q% Z! O# o' O
Group B: 5,6,7,8
+ y5 a1 h8 f% ^: ^' ]/ gGroup C: 9,10,11,12
  V/ E$ A2 v) F$ n* SGroup D: 13- X) k+ x0 q5 D5 o8 _) ~0 K
8 v. p* Z+ M% |0 j7 t
Round 1: V. _% J5 O1 h. p4 f7 I  x
Group A vs Group B3 D0 r6 f3 F6 d
如A and B一樣, 即較輕一粒在Group C or D
: l- U; d2 B) g& K, C- m9 K; w  d5 Y. b6 r, [6 k. @
Round 2- v( o2 x, Y( b
再在Group C拆成:
, q, ]  N! x3 U( c0 OGroup Ca: 9,109 H  V4 y! @  @: }  L0 b5 Q- J
Group Cb: 11,12
- I7 R; ?. Y4 o. f1 U然後再秤, 如一樣, 即13為較輕一粒.* {/ Z1 p( ?$ X4 H2 T9 v) [7 a. T
" c0 c/ s1 P; g
如不同, 即較輕一組有一粒較輕波子在其中,
! B( m3 c- {1 H. [$ [要再秤, Round 3, 之後便知答案.& k' \3 _* H- H$ \  ]4 }/ R

8 o$ w; P) y, }" ]e.g. #1 假設10為較輕的一粒
, R- j, f% t- v+ QRound 1$ T4 S. d/ |; r. `/ G7 @7 k  F
1,2,3,4 vs 5,6,7,8 = equal
6 E7 b& a3 ]6 b2 {' X3 c, W5 m* c
8 g, X7 ]/ i! E1 ?# a! eRound 2
) d# x* _9 U5 I% k9,10 vs 11,12 = 9,10 < 11,12
6 [! V' {! X, g8 b& y, d6 y* V6 b) e5 J) J
Round 3
. m; C  u/ G: R0 ^0 p- m2 f9 vs 10 = 9 > 10
) x& A0 j4 T5 t" O7 r- Z3 t
# _" F6 P1 Z1 A7 u6 FThe answer is 10.& d; t, d; @4 _8 ]9 c2 C5 T

" W* v3 u; f7 k$ U6 F3 K8 re.g. #2 假設7為較輕的一粒
# s& E( _2 `$ V& a6 G! nRound 18 d2 ^  D5 {7 R
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
& R  h2 ~2 I  @3 u$ Z
4 d7 a9 U) W# {" }Round 2
6 A# Y! S; |) Z6 }- Q  c( U* v5,6 vs 7,8 = 5,6 > 7,8: |5 Q) U: Z" \- Q) ~5 E' W( c  h7 X8 [
# m. y2 }* D9 h4 P* q" g" \. m
Round 3
: n+ e7 X1 `9 a- l2 \; P7 vs 8 = 7 < 8
( x/ c: E7 P& J, [9 T2 _
, N8 v$ s' y9 G! \5 F  M' UThe answer is 7.
' i7 a  i; A8 t/ [
' ~8 z) ~+ M3 q0 T/ Je.g. #3 假設13為較輕的一粒7 ~( b4 G( S2 t( q
Round 1! E0 B" [2 {8 C8 U0 s( P+ d
1,2,3,4 vs 5,6,7,8 = equal/ ~0 D- g4 K* K( E
$ S3 N" C: Y" o# N: l' `# H0 @; I7 ^
Round 2
4 G4 S; T- M' j8 [8 j9,10 vs 11,12 = equal
0 d3 t2 P( }2 p# L" a* z" C4 I9 L9 r$ }- n/ m9 {
No Round 3- _* `' e+ K/ y- j5 A

; N4 q* b' ?7 x. D5 A% G2 }6 i$ }The answer is 13.
9 k& e, }. |8 d; E! T; q0 x3 N) q% R/ R
唔知我答得正唔正確呢?!
( T( X  C# ~" V+ C2 s6 n8 w  s8 V1 r5 G) ^
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:0 {1 a8 ^5 k" ?+ C( F" Q
1.
+ S3 T8 A. i2 s. Q+ z1-6 vs 7-12
. ^  g! p, V- |! k: F/ ]* y9 mif 1-6 = 7-12     13 is fake) e. U4 S1 @' u' k* l9 L4 s

( {% m3 E6 H7 U5 D& y8 {if not
+ [0 ]% F7 m, ~2 P( F& O- M7 l* u4 X5 a* g
Weight the 2 time
" S6 g7 @9 E0 v* d3 l
' I; S+ B- F4 ]2 a2 V: [( ESuppose 1-6> 7-12
8 x! N1 U8 h1 v) i+ U  \4 o( |( F$ g
1-3 vs 4-6
1 ^8 ]$ e) _) X5 N+ R
6 @' ]4 T. S3 m6 p7 K- yThen Weight the Third
3 }. U& X- V2 x% h6 {& `3.- g8 f" r) \" K2 C6 U/ h: ^# n

$ d( z- ~( _- \% I3 K1 wSuppose 4-6 > 1-3: _9 F4 e: d3 l! _0 e
8 I5 a. x, @9 i' f! V6 e' F
Just like the first Step
/ C# ^* I$ h  Q1 A' \
2 k7 g# m, B" @, |  b3 P& y4 vs 5
! N( z" d: U* V' u5 r# p1 _  v% Z% R, {
if 4=5 6 is the fake one + {1 O4 a- J& F4 Q+ j9 X

9 u( j9 D- y+ [2 I$ F! _if 4>5  4 is the fake one
$ y" J$ P; r0 H1 _* {6 H9 c8 eand so on......................

2 o( u7 w8 C8 R$ Z) i, C" }! h. q+ {% W4 P2 W3 ~3 P. K

7 s9 p0 W- w! z' N( S  A" q2 [問題第二步0 V  ~# J7 M3 _$ W( O. s- N8 h

4 x  S4 B/ X2 N: v. pWeight 1:  1-6> 7-12
) U  I% N! D. X+ J& ?; U  j& R0 \8 G! d7 \+ _8 V2 t
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6! ?- [+ @0 ~" |; u9 y
/ F* H8 x& r! @) M6 O8 j
你第三步点去搵 7-12 边一粒???
$ |4 {1 c! H) g' U4 o) G, z4 N
1 ~! a3 x% `" U( F3 q. F2 |========================================
! R. Y0 p9 y4 \- N: n
+ `8 S6 G* G+ L9 @; c) ?問題第三步, V$ _, i  z: D3 Z% r/ R) r
' u  K2 n$ b9 w/ n, a# y" {2 P5 v
Weight 1:  1-6> 7-12
- E. _; K: a9 {8 Z1 [5 W
2 x( u. d6 F' [* k' o+ lWeight 2:  4-6 > 1-3
; x- Z! |8 i- t3 B4 X: t( Z
9 x% b. [# c0 X" t( l  W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