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$ }' T6 R5 h1 d

# \+ y" I2 a; a( y『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)。: D: ~# k" H$ O  l! \8 |! k& q
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？』
/ S. d2 Z& y8 t/ b, ~" Z" K' f3 ?% J5 r* x! m1 S6 R
注意: & Q) K; G' @& J  D& w

( T# M3 \& h$ k& u8 n+ e6 z1. 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
* _/ V* W8 w/ a2 ^4 \
) v: h1 Z6 _0 Z2. 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
% P- V/ o$ k" T3 J" K  |3 Z* k9 j7 Y
7 U: u  e3 ^3 M/ Z! G( A[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' J8 `3 }3 f2 p+ y8 O" N5 g9 ?相信e條題目都有吾少人玩...

) U( O. M- N4 d) _1 Y$ J+ g我以前畫左個chart去答,& p5 d* u8 @0 \; v/ _' w3 ?
等我搵下仲在吾在1 S! _8 h) j- j$ |3 G) {/ t% ^

! S7 g5 g- O7 c1 Z% t+ B當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ A6 {" W5 D8 ?2 z; m. k2 ]13.........
0 Y+ k* r7 S# {+ X) P1 i$ Z" R
) n; H+ E2 L5 j[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
/ y! V. J, E; ~5 A/ z2 I1 u; v- f0 M" v7 Q0 a  E
我以前畫左個chart去答,+ o, H# x* d7 r  ?  L- O
等我搵下...

3 |3 D, D7 @% H# a
, b) ]: B" s0 C/ U: H; V$ l2 r0 ]
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:
! _& o$ |2 b' [) U' {唔識隱藏...已經諗到..

$ F2 V! d4 ?& F2 j5 P& d6 z! H) I" o2 X# {6 Q  }- W! `
sor !!!....e加改左
: g9 v5 \: |% k9 ?5 Q$ ^# r  d1 l* n1 v
0 k- A/ I" @+ A8 G# A( h2. 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3 F- j& M" c3 {. G' {+ w' V

* Y! e& R7 J6 g7 \# O. G. |[ 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 b) l0 t8 a/ E7 q, h6 c& l
相信e條題目都有吾少人玩...

( n# Q/ a5 `5 {8 A- ~' E, A
5 q$ {" `9 [2 F$ j& M1 `
PlayPlay, Let me know later who has the right answer and I will add points accordingly.; X* r2 }4 |1 D4 t* n  R; T+ f# l5 C
7 y7 L! r: n8 c- S: {* F
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
. h+ C6 o# [' z; u( w6 C! S0 h7 h$ ?3 y& V- G1 A

. A* O  w4 y( J9 i, ?' E! F8 }PlayPlay, Let me know later who has the right answer and I will add points accordingly.
6 J$ p* B8 o0 l) o/ h$ J, B9 P) m. E9 W) ?
Thanks

7 z* j$ a4 V6 d" M4 @
' k* N0 i' }  C6 E7 I- N不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.  K5 j$ K* y; ]" S
1-6 vs 7-12
( }6 ?: \0 T" y% W. z& bif 1-6 = 7-12     13 is fake9 M+ w6 H8 o8 _, G
  r9 r. F: v3 y# ]' d1 c! A
if not
' b) [6 I% n& w# w5 y" a& }- P! F+ _: u
Weight the 2 time % l+ d" Z8 f) }$ ?
( O  w" I/ y! l$ |( `
Suppose 1-6> 7-121 J) a# }1 L/ e8 F. |5 z' \2 {
6 ~+ ~, J: D/ h1 q' [! _/ I5 E
1-3 vs 4-6
  Z. k7 q  |7 L5 U
1 A8 T$ m& P; N# {Then Weight the Third* q) P9 G: z% `1 e
3.
9 Q0 G1 f+ [4 J) U. u3 Y
- E7 Y: a  K  F6 |6 Y! |1 d( X& FSuppose 4-6 > 1-34 n# @, [) _% l& d

/ V) w, Q+ d, e# y$ f9 wJust like the first Step  E/ O; c4 J8 [4 P
4 A# V" M( p9 K  N. t& s
4 vs 5 # g3 v; c+ T% K8 |: Y
+ J& P/ _6 T- K! p6 o9 ]5 c
if 4=5 6 is the fake one ( q' m  R+ _/ p7 ?) G+ c

4 E+ y& }! o% Z! Cif 4>5  4 is the fake one   y. N0 M  b) J5 f) t. H

( i, |: [5 K) i9 P9 G/ n# jand so on......................

hello1997

分3組4隻波子秤
. V0 }6 a- {: G" p( B  w) b$ ]( D7 W; A! T1 {, j
Group A: 1,2,3,4
7 P6 Y9 K* H. g- u. U' eGroup B: 5,6,7,8
5 m% k1 c! A% l( QGroup C: 9,10,11,123 V! k  H  R4 c6 X
Group D: 13/ v) ^6 u- x: @% E% J

) V( X6 R: K7 `* A) X! ARound 1
" A2 Y9 u2 N6 q. d" @$ K/ oGroup A vs Group B: v- b/ ]3 ]- H! K0 I* c) O
如A and B一樣, 即較輕一粒在Group C or D" I% i" w* _! z

; t* `4 e: f" A' IRound 2$ F, a2 m" e" c% P+ s2 [! b
再在Group C拆成:/ \. h8 e. ?* y+ s$ m9 H! u3 x' }  Q
Group Ca: 9,106 j8 z3 C9 e9 E8 Q
Group Cb: 11,122 g/ T# k& [7 b2 {: |$ y0 v
然後再秤, 如一樣, 即13為較輕一粒.
; ^% Y. }9 o# T9 L9 }3 k; i. g% S
如不同, 即較輕一組有一粒較輕波子在其中, 6 _# M$ S$ y" Y( s1 c  T3 ~' w
要再秤, Round 3, 之後便知答案.
& u8 N4 h  m- }/ z9 ]0 K/ T4 a0 t$ u) |, r' F7 ]0 A
e.g. #1 假設10為較輕的一粒
( `4 p# l6 G; m! H' d, }/ Y% `+ \Round 1
( u  l9 I2 E& `, W# X! ^  W* k1,2,3,4 vs 5,6,7,8 = equal
2 W& |. q  o) c7 }  R* Y4 C& D# `- R. k) X5 p( c
Round 26 K* ~# V1 L" I
9,10 vs 11,12 = 9,10 < 11,12
# _+ ?* C$ a2 W0 W# E
+ T7 f* H* _% Y0 T$ v7 N8 vRound 3# o7 f, j( @$ L  t4 ^( W& M/ x4 Z
9 vs 10 = 9 > 10  g% v! m7 p! r) f

( O- W% m  O, {3 u$ sThe answer is 10.. x# c6 ?! ?* N3 W4 M% D5 ^3 G
$ I: `9 E% ~9 {+ `3 J% P  C
e.g. #2 假設7為較輕的一粒
. ~( s; i3 U0 dRound 1
: O3 W$ Z$ o8 R( ]$ z1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
: o% e' Q0 ^. A) n0 p
3 Z$ R  \# ^4 O5 g4 U7 bRound 2% S4 {- ]9 m* R0 K: `
5,6 vs 7,8 = 5,6 > 7,8% @* O5 F6 T6 X  P& z; g! w

7 T6 ?3 B8 ]& O/ LRound 3/ H+ B1 K( }/ a6 s: o# X
7 vs 8 = 7 < 8( S- P! N" r' _9 f7 Q7 l5 k

! }/ {# y2 O3 F* G+ RThe answer is 7.
$ M2 M( t- X3 H/ ]& }
2 ]7 p$ K& Y% n7 M7 w+ J0 Fe.g. #3 假設13為較輕的一粒
/ C# d. k$ U2 ?' P" z1 ]  k; BRound 19 O5 E/ \# \3 d4 F' h5 r: j
1,2,3,4 vs 5,6,7,8 = equal* w$ _7 K% T( Z) ?, @1 E& B

$ q  v" P) O6 u( w& o7 \Round 2
8 l$ i1 P% @- ^0 m% o9,10 vs 11,12 = equal4 G; C; g& Q& m6 x, \+ j4 h1 U
- \3 d: ~, y6 o6 d5 C9 M
No Round 3: S& Q; B7 h( k3 K7 I) m

# U0 X1 K3 P9 e* m  gThe answer is 13.$ o5 C) l6 a1 i' n4 u" i

1 A  v! g) v: i2 J唔知我答得正唔正確呢?!
8 x9 B  _: y# x9 [; V
2 o0 Y0 t( ]; r[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:4 f3 }  P: c) M2 G
1.7 G7 C* o: u4 Q! @
1-6 vs 7-12" L; V+ B1 Y. ^; \) Z0 ~- N
if 1-6 = 7-12     13 is fake* w. i4 ~0 x5 D) E! @

5 L$ j" R) A& [. {2 I. T# \+ j; Iif not % \9 {$ m( _* c3 V0 K/ K7 k" ^

3 y+ [5 h$ Y; F9 ]/ i6 U3 tWeight the 2 time 0 U# z* r$ |  |' R/ `  c0 `  `1 }" s

% u/ k, P3 ?8 c) [7 `2 h; CSuppose 1-6> 7-12
8 J$ y* R. y8 Z  C, Y8 v. W' X$ e6 v6 Y& f+ T
1-3 vs 4-6 ' L0 d3 P$ T5 o5 [3 N! U$ d

$ W% a6 z( z9 f! \4 W' s; wThen Weight the Third0 K6 P; d/ u4 G5 \
3.- `, d) U/ A9 ]5 ^
/ ^/ M6 W# y  X' \' \3 r2 w8 f. z2 F
Suppose 4-6 > 1-33 ?. [+ G2 r# f$ r

1 C  M. g1 d) Q# ZJust like the first Step
- X0 z" M6 i: y! ?3 J( c/ h- r* H; X1 `3 Z. Q) i! [5 |/ Q; q8 H
4 vs 5 3 N/ U2 v3 a( E" H. N4 w! \

( W9 q! [, C: S) k/ Dif 4=5 6 is the fake one 1 u2 v! S; N8 j2 q! A7 D1 r$ |
) X' X6 h& r2 T9 d# @7 Q
if 4>5  4 is the fake one 2 z( T' E8 p9 }- T
and so on......................

* n' `& S0 m* K" O7 O" n
: b& k3 A+ k1 W' `
% @6 K8 M% j' c問題第二步3 B0 o8 n4 g! ^$ H" k, a9 H; M* y
( l- y& k8 N2 j
Weight 1:  1-6> 7-12* _2 d+ t5 l6 E2 n
0 N  T. F1 j& D9 M0 ^
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, S1 Z2 w4 J4 @* E' ]

0 y9 P4 J$ c( @. L) w你第三步点去搵 7-12 边一粒???7 j5 I; b# A1 o% u. n0 g7 \
. ]  b( X6 `4 B# `/ [3 \! |, A
========================================' T0 N% [0 [/ l
/ R+ ^7 X9 v3 M: G  e8 I; W8 Z0 ~
問題第三步
8 t2 ]" G- Y# ]- M( o3 P9 Y
0 B" R* T' i3 u1 ~/ ]Weight 1:  1-6> 7-120 Z, c' P# x  G) ~
4 a6 o# |5 ]5 s
Weight 2:  4-6 > 1-3
+ s6 V* E8 k5 {. g6 S) r+ L3 s+ y& ^( a5 ]6 [, W2 y; X0 O+ x
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