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& R6 _6 u2 d, Q3 c- n" x( `

0 G( ]% ]  |1 b『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)。
$ O- S; S, \. ]& r+ k" [1 w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？』
1 P* G/ z$ F3 J2 w5 S1 ^7 G& S+ U/ p( D4 {# N3 N1 @  @
注意: ! D8 c% M( ?8 h* ?
( N6 S. q% c7 ^9 _
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
" z$ m7 }/ Z  O5 U" N# m, A: `, N3 |' w  r
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
! ]; I8 f* g$ W9 H- d6 h. Q; K3 l% v# O1 {  \$ y2 j
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:2 M) B+ k% p8 N7 }$ M- {
相信e條題目都有吾少人玩...

9 C) b# l0 x% Y2 u. b1 `我以前畫左個chart去答,& d" o2 [' G4 B" a
等我搵下仲在吾在
; t$ ~- S) W! M  s4 N6 K9 H
( _, H, w# j; F2 u當日用左37分鐘答１２粒波子，差７分鐘才合格。
) G- x( w9 Z6 h. i13.........
. o! t( I0 E0 g. C7 Z0 u2 D
% @5 z# B5 M% _+ j8 y2 L6 G[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
# O# m( J8 s4 R0 q3 g: B0 ?* i: M% Q6 O! i$ |& D
我以前畫左個chart去答,
( K9 }* i8 B& z( L9 M7 a等我搵下...

+ P/ X. O7 g. G) m) M
$ ]" ~2 b2 K- N& t3 L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:  ~1 b* [: e# z/ W
唔識隱藏...已經諗到..

% o; Y  L2 _  e
/ E6 l/ p; [3 ^( `* d7 O
sor !!!....e加改左8 d0 U; I# P$ ?0 Z4 ^
7 i% }7 j$ }% t% f: D, p# Y
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1 p$ D( O/ W5 e

' d+ @8 {* p! F* C$ @$ {3 D[ 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 Y3 K0 J3 j& K
相信e條題目都有吾少人玩...

" S4 h0 \6 J! e# Y) k, O
" q% ?( E! |  [3 b7 X; c2 C0 `
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
; \1 Y' E' v" ?8 B( n8 K; D7 M
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
/ b. f4 _- ?, C% K! {6 F$ L% M
- z; W. }: u; ^3 V
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
' |8 H1 E9 j. Y% M; R4 {/ w$ H
, W: S3 {, o1 X8 ?9 [( ZThanks

  @8 V* c! p7 E# D7 F  a3 j; i& \" N% j( R$ Z. m/ ~- C/ Y4 D/ P! v
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.: Y  B/ j) M; K! u: Q+ j
1-6 vs 7-12
2 _% j9 i  e, J' Sif 1-6 = 7-12     13 is fake
  K' B2 p" h& R3 [4 m. `8 B- _1 |8 D) ]! X
if not
! S( t7 c' ]7 }& m% D, E! }
' D- O& t& v$ q0 ]- o# s4 bWeight the 2 time " {) G0 x  C+ p6 L7 v3 o  j

# _6 F, Q0 P- l. n& N1 i9 ESuppose 1-6> 7-12
$ j, k! s7 q. |6 c* N* |
3 z& z( j! L+ `6 @1-3 vs 4-6 ) I. a% j2 ~5 w' A' ?7 Q
* u  {: t/ ^3 H* j4 m
Then Weight the Third9 f! h% ^7 n# c
3.  d. |; F: z6 ]

' w7 [7 a/ o% U5 T( F! K! \Suppose 4-6 > 1-3
4 f' W" s6 `5 B, F- T, |+ d3 ^6 E
; b8 P4 i3 z! ~" N4 Y* S' z. t9 _" \Just like the first Step
9 U: s9 `$ T* v. B2 R5 k$ ^" z  y9 P0 E
4 vs 5
* o) \% e9 g4 Y# D# H7 y* O! b! i* l, b3 W
if 4=5 6 is the fake one
+ a4 h$ l+ g  V" k
: E: _* A5 X- X1 i) aif 4>5  4 is the fake one
, o8 F8 n. R/ R$ o* |, \  r9 l3 t( ]. w- ~+ n* j& `
and so on......................

hello1997

分3組4隻波子秤
& b6 A5 n2 ^) |9 {- r" K; u0 w" E, W" U' M! v: J
Group A: 1,2,3,4
/ {/ Y0 u3 _9 o; j. YGroup B: 5,6,7,8; ~, _: q7 B4 ]
Group C: 9,10,11,12
1 e" q0 V, e" HGroup D: 13  r0 v- W0 ~* y
$ f- M( r6 N3 _% I
Round 1
: {/ Y! ]" h( c9 u2 {Group A vs Group B
! ]; ^9 E, F) t) R% k如A and B一樣, 即較輕一粒在Group C or D* y) d3 X5 s  t, t$ L9 e' R( f7 r

6 O4 k6 ^5 p1 W. E4 z1 g  _Round 2- Y8 z  P  A  q/ R$ ?
再在Group C拆成:
4 z* N* @$ U# Z2 n8 i& J6 _Group Ca: 9,10/ [! S9 @! Q5 t
Group Cb: 11,12- [! \0 y) W' c' n9 H
然後再秤, 如一樣, 即13為較輕一粒.* @# j$ b8 e: K3 W& i" f- y
5 P1 C# i2 Z# M5 `/ u0 i3 U
如不同, 即較輕一組有一粒較輕波子在其中,
! l3 w( V  b$ }- l2 Z. o* q要再秤, Round 3, 之後便知答案.
/ F3 T" O, P0 g; j2 J, N! Q) D; b9 H! E% }
e.g. #1 假設10為較輕的一粒- k$ g9 y  {& Y8 J) v
Round 1
. y( g! q# F; M* t' }1,2,3,4 vs 5,6,7,8 = equal+ U  h, j* Q( B7 a' v, g

* q4 ^4 n4 \' n& \1 n7 v; LRound 2
8 t3 o; b+ ]! E! I9,10 vs 11,12 = 9,10 < 11,123 u% y3 _' [" V; t

* n( V6 P" T- C/ h; Z7 bRound 3# B; D3 o( [) A
9 vs 10 = 9 > 10( m: q) Z! \! e- w

# q( E* n( [) ?! T8 j" L1 WThe answer is 10.* [) F9 j5 F+ t$ u$ p
9 C' L$ E1 O% q' N1 \
e.g. #2 假設7為較輕的一粒: w; ]; K9 Z" u. Y& ^
Round 1
9 E3 w9 `( \/ W3 h1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
9 P1 P, Z- q& x
" z" U* ^% h9 F1 D5 c5 ]Round 2( t% H* `' ]0 p' d! X' a
5,6 vs 7,8 = 5,6 > 7,8' y# k' b9 J% ^$ M3 g( g9 W
$ o  a( U  J# X$ Q9 }( ?: L
Round 3
4 ~& m& W/ i' \( m8 E* @7 vs 8 = 7 < 8
4 @) M  q0 s# S6 N& |
9 m& a2 E6 D5 ]$ m3 W; K" WThe answer is 7.4 L+ a# K0 R0 A% B  ?
0 Y, e) x3 ~! S) q
e.g. #3 假設13為較輕的一粒3 a8 `1 G8 T6 E
Round 1. E% G0 B: Y; x4 R. U9 ]+ r
1,2,3,4 vs 5,6,7,8 = equal
9 ?1 s: M5 T; j& }, l$ E
9 J/ A" H7 p$ A" a, h( kRound 2! \8 T! D: z. A* @1 j
9,10 vs 11,12 = equal
! F  X9 `7 l9 X6 H- E/ w8 H
; d4 W( T4 D- _- I% {No Round 32 t" v/ r# r* u" C" L! U3 U' ?

6 }9 R. J; O0 ], UThe answer is 13.
% i' A- T$ z+ G
: V; o9 Y4 N2 p% l9 N( _" J- c' A唔知我答得正唔正確呢?!
# J  t5 _8 I5 H5 i2 J
1 i3 w' {) j. W& k/ H) F- ?5 A[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
; x9 Z0 f6 w3 u/ D  f1.- E1 u# L- i$ o4 ?
1-6 vs 7-12. x, m. ?& |- x/ F6 X! B
if 1-6 = 7-12     13 is fake5 }3 _7 b' x8 b. g' n, s7 k! b

  O6 L" [" b' c( zif not
2 ~" U- Z& z; H; `& h0 D' z8 O5 C; N/ l# r. k8 g2 b3 M! H9 c+ Q3 r
Weight the 2 time 9 j' U8 h, D7 [1 V
2 O0 ]7 \( f9 ^* d
Suppose 1-6> 7-12
5 M) E; Q1 g) E$ e$ z4 Q; V3 e, e" C! V/ R- z$ l; I
1-3 vs 4-6 0 ^  _6 i6 T& X0 x
8 b) m, \0 A* G. x. d# s6 Q: N
Then Weight the Third; {" Q! m1 x$ o
3.
. f1 Q4 E# B, O- i* s! {* ?9 |6 m& K
5 T: V! i6 u6 fSuppose 4-6 > 1-3& A! T5 v$ R7 ~8 \- T* c4 X+ N7 t

7 f+ ?" L( K2 @# i4 n% Y! Z$ |Just like the first Step  E9 P1 k5 r& h( x

# S) O2 F7 a4 s4 vs 5
9 b- x1 j; p1 U5 \2 Z) |1 v$ r, x; g8 u' H. M; H3 J3 i; U
if 4=5 6 is the fake one ! F+ X' {3 r( ^4 }+ X

% t1 C8 ]7 U5 D( R! nif 4>5  4 is the fake one
+ Z9 J& H" f& e7 G3 A% O: kand so on......................

( z# H" {, N& f/ r- B

  E$ x# v/ y7 y, J, b( P& c: y$ p
  c5 O+ ]7 u1 H! {0 ?% I/ B( n6 J3 ^問題第二步3 k) h5 c8 n1 ^* H0 M2 E; \* e
( m) c) [5 s" w8 {. U. ?- z  ]
Weight 1:  1-6> 7-129 U. }& H8 q* A/ L( s

% `& _6 [' p0 G; T" cWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
& f! Q/ K( ]" O! f  a4 q8 ~0 u
! [) W7 f  Q/ T; ?你第三步点去搵 7-12 边一粒???
9 w2 C0 ?1 N6 Q; k" ^2 U; C( z' v* l1 p- j
========================================
. J4 O. K" Y2 u+ y6 y) o2 d5 A. V& H9 X) u0 }4 L+ {+ w/ R3 T
問題第三步
/ n  Y  X% g  n0 ]9 U& {" ^* k, O& x7 h: W: _9 A  l; e$ M; B% \
Weight 1:  1-6> 7-12
/ }. @  h/ a5 ]" B7 C5 {$ w* |* G* Q; z
Weight 2:  4-6 > 1-3 & h7 m! H% V  L2 S! W

: L6 S! s4 B& h; q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