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( b* l3 ]4 e  i
5 S/ o% C5 T  _. F; [
『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)。
8 f% B- D: K. q/ c& h2 k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 w% J9 t, V  C& {  c5 |

: q& Z4 R. {& [; Z5 Q$ X, ~, C注意: # r  d! {, J( a, k$ p2 E
" e5 r& O& C, Q: A5 X2 s! w
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1 h& D2 b+ I/ n. Z& k

4 h+ V/ {) E1 _! |+ 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  , hide 字要連埋 , 內容 = 答案
. }4 Y2 S7 N& K3 k/ f; B: }" e% K6 j! Q, ]! y$ g, _
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:: u% R; E6 v% Q! ^6 q+ Y
相信e條題目都有吾少人玩...

" w. C+ I9 z* Z; j我以前畫左個chart去答,# `6 d6 c% s( i
等我搵下仲在吾在
, r) ^+ h7 A1 F0 Q4 Z! s3 m$ a7 `( o; l, c
當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ O0 Q) Y: w0 l2 c' K$ [13.........' F2 u4 ^5 _3 f

$ a( Q4 I. \3 X' k, p, Z- u4 q  I[ 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 g8 c2 H* a; |( f% b$ V0 Z3 x3 s# v9 s
我以前畫左個chart去答,& O' D$ D$ @, y
等我搵下...

2 z" v* _) H  ^( t1 E5 R: D" X) ?6 Y

4 l2 V. X  `9 x( J; v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:
5 H/ z$ H6 O: Z- Z; m6 M唔識隱藏...已經諗到..

9 i+ X0 x8 K) c/ i
- U- {0 c  _7 ?& j" G  \) h  gsor !!!....e加改左
) S; B4 E! m. M! ]- S+ F( g& l/ D4 L' P3 v4 N+ i- |5 R8 \. X& [! {
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
* o8 S  J  Q, O, d1 R
  H, T2 Q) t  C4 t3 e' S4 r% R[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
9 e1 Q' O! m2 Q; Y$ ~: E相信e條題目都有吾少人玩...

; I; G& O( {! ~  b- M$ w
" o0 |8 w4 r' y1 a' M6 a
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
' \/ N  U+ \: ]1 w  i4 e6 x  H+ i% |) }5 ~4 y- W
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& x& u% o* y6 e/ q9 A& c

* y8 t: w$ p! T
+ `2 P1 ~8 a. \$ j: sPlayPlay, Let me know later who has the right answer and I will add points accordingly.
, [4 {/ U# l# ?! f; L) I! ^8 x! e& V( t+ z& r6 G$ t  B
Thanks

" J  b6 V2 Y2 o/ c" i. M

4 W( R; d8 R* \" i' g/ V不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.( `: L6 a. l6 q+ j: H5 [- r
1-6 vs 7-12
6 m+ b' v4 Y& y% Z, z: J" Kif 1-6 = 7-12     13 is fake
" _( F* m, s4 `1 {; D
+ T* o, F- Y2 O7 iif not
1 R) f% S8 p/ t! }9 [
4 h  N' _1 D" ^: \  Q+ @" u; nWeight the 2 time ; h' O. g0 I( u) l5 v% `' c6 e
/ k4 `) @- C6 B) T
Suppose 1-6> 7-12! X2 r5 `7 ~, f( P

# D. v: P8 C) o; ?1-3 vs 4-6 3 c! `8 c9 C3 A# t

' e5 t% ^# V$ o7 ~( L% U- ?Then Weight the Third8 Q1 l: C# S) v0 q+ e2 ~
3.
  k8 l2 a* V+ e3 e3 M" [8 V
; g) ?1 i/ a( z3 c& c! ^, T# ^5 q1 ~0 QSuppose 4-6 > 1-3
7 m' c/ k) U, Z; n/ e
* H7 K* i' A$ ]Just like the first Step3 v7 Q* |0 g: }+ W7 I3 e# h
9 i& y: q2 x$ ]" V' h
4 vs 5
' @6 n+ T9 C( M* H' u! m; y; A6 \  ~7 G0 w
if 4=5 6 is the fake one * q5 B- k# O8 B/ ~
% m( H% H& p% P! C& N
if 4>5  4 is the fake one 3 k, [2 h2 k" _3 U5 g) U
! ]9 E# A- Q9 y7 u4 a$ L
and so on......................

hello1997

分3組4隻波子秤
( e0 L4 f4 q5 M- @% e1 I# K( t, k7 K" E8 z! O
Group A: 1,2,3,4- A* O* v( V+ v. a' U
Group B: 5,6,7,8: [- @) B8 f$ L2 {0 H
Group C: 9,10,11,12
$ e' V" n, V) K/ eGroup D: 13
, n. u9 {/ Q9 [7 |( A. C2 K/ t9 Y2 F; e& C7 T0 H! p
Round 10 l4 n, b# d4 X! J% y/ f+ @
Group A vs Group B1 t( v& ], D: I* q  N1 m
如A and B一樣, 即較輕一粒在Group C or D
5 `* k/ @, n# y5 M; i& k' {/ J$ w* o8 Y/ r: V: t% z
Round 2+ `8 V# m8 M+ J* z& T/ e% A# u
再在Group C拆成:
( |! B  u' x7 nGroup Ca: 9,10
1 [: k4 @! _! E2 Q4 ?' ^+ pGroup Cb: 11,12
0 U" _6 |3 _! }& p+ v, @0 o& k; q- A然後再秤, 如一樣, 即13為較輕一粒.
4 \% f$ Z' |6 B3 H) b
6 }. c" @; W; H$ ^) m如不同, 即較輕一組有一粒較輕波子在其中,
9 C% P- x# I- L$ c- C要再秤, Round 3, 之後便知答案.# R. ~3 ~; P4 B) ]' ~1 U
2 v% B( V9 V9 V0 ]8 j9 K
e.g. #1 假設10為較輕的一粒
; }! h# k: p0 x5 qRound 1
3 q2 {/ Y, G9 V0 O9 B1,2,3,4 vs 5,6,7,8 = equal. H( R, z: m0 O3 C, F  _1 q$ ^
% W0 ^) O9 B& e1 t
Round 2+ ^1 S, Y! k# G. L2 O8 B" Z: F4 Z" t
9,10 vs 11,12 = 9,10 < 11,12
5 t' ]$ K6 v+ s5 r, g. v9 Y7 K' m0 |+ G6 |' \$ O+ q; T" f# ^
Round 3
0 {: C+ }) g! I: x; {, r; J2 f2 i9 vs 10 = 9 > 10
* x$ l' M% ~" ]  m% z  e8 c6 o5 w3 N' O- G- h8 g
The answer is 10.# W; T  w, u2 B

+ k' ^9 o9 m$ v! Y, ee.g. #2 假設7為較輕的一粒$ x/ D1 t7 x* l2 X% O
Round 1  ^8 r. K+ e+ `: Y& T
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8' z! a6 x9 Q( H; q9 W0 m" n
. U* C, [. b, r( V7 R
Round 2) w' [% K- k8 ~3 R) Z
5,6 vs 7,8 = 5,6 > 7,8( `, C1 a- c! }, l2 k  f1 m
' O0 f; M3 h8 g
Round 3/ h4 M9 {! r/ e5 s1 U0 h* x
7 vs 8 = 7 < 8$ h  {# a; H1 g. E- q8 _7 P' M

, y3 |# i& {$ X/ A' AThe answer is 7.
, h- R' u; _. l0 Y5 y% R8 P, x7 J$ r
e.g. #3 假設13為較輕的一粒
& L8 {2 B* Q: W6 J2 ZRound 1% `' V- F% Z, O+ E: t  D1 o: V
1,2,3,4 vs 5,6,7,8 = equal
; X" `# Z9 E7 k5 c6 T5 |) m+ \- h5 v6 C' y6 |! q6 J
Round 20 p  Y4 D1 i0 S" V& b, D
9,10 vs 11,12 = equal, ~: Z: b' M9 r- K' w5 Q
$ N- U6 I7 a1 w! r
No Round 33 \" c# J% P. T! ~: ~5 O3 ~
3 ^% [8 k0 \$ T8 t+ B: g
The answer is 13.6 {) ~- J; S2 N$ _1 N

% C* Q9 I7 `; \1 `/ f; m3 b唔知我答得正唔正確呢?!   X- R" Z3 E. U# j1 |2 R

' r4 p9 D4 k. q/ K6 ?+ l" c5 @[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
! Z/ |( P" |- S  X1.
* _+ R' Q8 K% K' e; w1-6 vs 7-120 O9 |) y: c  {' c- _7 s
if 1-6 = 7-12     13 is fake
1 M& U3 d" j" q) j8 o. a
4 w/ M; k9 d# W- p& y. `if not 1 w5 P! u) c+ l

; T# B+ q5 _4 g: r) R- d* E, iWeight the 2 time
/ n7 V  h8 L: K( X8 C- c" D3 w! V( B3 g9 `" R% q) ~7 N0 A2 ]
Suppose 1-6> 7-12
* Y4 w2 C# t1 X8 ~" ~- w* _) h& E) y8 \* {
1-3 vs 4-6 : o  ?( C9 B& v

6 q( b& E+ o$ i$ J, N3 }7 tThen Weight the Third
+ o( W: q. B1 k2 s( i# C3.
1 G' |( o6 O, Q! k" p/ u( R2 ]2 `# ?/ x9 j2 R
Suppose 4-6 > 1-3
3 X$ C* m9 o8 k3 B, i7 \
. h' C/ y6 [% F: nJust like the first Step" ^$ Y7 n+ c# ~/ H

  r# z4 R0 R3 P; ]& v, k4 vs 5 ) w5 b3 w1 k# {: d9 G+ ~

! X" N9 W" I; z& X" v- Bif 4=5 6 is the fake one 9 l5 w* t9 x; j: |4 r* D: t, B3 q
. B2 x) g' v1 M" v& X7 N- P& M. G" P
if 4>5  4 is the fake one ( R9 e1 C" k0 {! ]8 w
and so on......................

8 J1 n  V; ^* \( A8 X/ N

% {+ I" F6 t4 s5 l! d3 h& Y* r. E, K- m
問題第二步
" ^2 S0 Q! Z- {
, {9 O" Y5 ]: Q" ?, vWeight 1:  1-6> 7-12
; |! k# G& D5 V3 [# |/ X2 K; g
; S* t0 w1 Z$ t$ H1 Q) ]9 FWeight 2:  1-3 vs 4-6 , if 1-3 = 4-68 C9 g! k3 x. D# n! e  h% w

* I: t$ [+ Y/ d5 F你第三步点去搵 7-12 边一粒???, h( ?5 z6 i1 W) t
8 B' _" T0 F, f- i0 o# S1 D
========================================# s, N) J0 O  V; w; z
! [! J1 N0 v- v4 x, m6 k
問題第三步, Q# n* }6 L+ l4 U2 M3 ~% f

. C5 Z( [# ^2 LWeight 1:  1-6> 7-12, y( b& q4 @$ f# \" V

% _* d' C" d$ Z# yWeight 2:  4-6 > 1-3
  x( r- A; G8 y; `7 R  X) l
1 O  h% l. d2 s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