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) u- p. _# o+ E' i
7 ~8 j0 r, \0 `- U1 W* T
『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)。) ]1 T  ?0 I8 f3 Q0 [
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？』) z' p" E! I2 n5 e

3 k/ @( \0 H! Z* ^7 k注意:
, Z$ `6 M- [( u
7 f" q' f8 q, ^* K/ N1. 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3 B' p+ Z2 l- l: O4 e/ c

- o2 C' }: J' f0 k- J; A2. 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
: C( A0 B. H8 y+ [/ D7 }6 O% @0 @! f9 y* I/ R3 o" z
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
4 B" Y2 `; D0 P. ^  J/ m) Q9 Y( [相信e條題目都有吾少人玩...

( V% y' M* k# J6 Z
我以前畫左個chart去答,$ }/ M& M( `9 _2 Y
等我搵下仲在吾在
  e6 ?7 [. Q- s! p: T, ^9 s
! y8 c5 q0 ~% a4 J4 s1 C當日用左37分鐘答１２粒波子，差７分鐘才合格。
0 c# ^8 G5 u; i) d$ {13.........
* q( t0 P* A& V9 @5 p  g" {+ \
. g: ]+ ^1 v% y/ P8 G8 B* B[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:# Z& b9 g% s# a
: {8 B/ [7 s! R; {5 ^& V
我以前畫左個chart去答,# [; p; v. x  D/ S
等我搵下...

2 A- T3 U: w, ^, |+ g
; X4 U# B( q# w( H) Z  E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:! Z/ l- J5 Z! ?. C1 x/ b
唔識隱藏...已經諗到..

) u/ m- z- O! r- W- h+ h" r+ M; |/ H- y9 c
sor !!!....e加改左# z  d1 S( f  H: \& w% r% s$ i

& C4 ~4 I3 g8 ~7 K! N2. 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
: z$ Z, t1 A7 I  p( W4 ^
, i+ }) ~3 c5 ^1 t4 f, _[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:% P9 X  y2 H, A# K2 N8 n
相信e條題目都有吾少人玩...

, x# I1 k: m% g: F0 X! H
9 ^) a& L; F& J$ e3 B% T+ CPlayPlay, Let me know later who has the right answer and I will add points accordingly.
$ P( i& B! g. U* q7 ^9 K" x7 Q. U  N7 x4 [# H) m
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% G1 H1 _8 L/ f0 F
: v/ Q* F3 g% q( |! u7 J; p
* N& U5 y' ?4 H6 z* Z& J
PlayPlay, Let me know later who has the right answer and I will add points accordingly.& N* ^8 r0 |) ]8 H$ T) a

3 v* a1 |. H/ z; u! CThanks

# G0 M6 }% p7 q4 Y; m
: F7 b# \8 o2 S2 p* ~# ~8 ?3 g  k
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
8 P. v( _. r+ M3 g& ?8 y- j1-6 vs 7-12/ ^# o3 C* b& v+ x$ j) R
if 1-6 = 7-12     13 is fake
0 u0 [; s, x# q: P9 i
+ W* O/ f7 v6 ~, e% Oif not
: }7 F, Y$ w5 F- o( W8 q! ^& i* n9 b5 S# W2 S( p
Weight the 2 time % b3 ^" b9 F+ N# `5 B
1 Q; Q5 T6 k6 v8 N# h3 V/ ]5 \
Suppose 1-6> 7-12
, K% a+ A! o  u# F% b; L) D4 L8 e1 O& l
1-3 vs 4-6 " K; r% N2 ^# G1 j0 l

8 t8 [% ~9 o4 V3 }2 s" ?1 _/ t" lThen Weight the Third$ X$ ~: T* @/ w( f2 g9 o
3.+ E: O: X3 Q6 Y# [7 U' Z

1 z* a+ a6 l' h& aSuppose 4-6 > 1-3& p% A# p5 L& v3 t6 ^$ e
% Z  n3 }) C, C  t
Just like the first Step/ T! E( E; y3 t+ B: V; J8 M
; g' W/ w- m. w; _) C7 S& U
4 vs 5   P- r$ L3 A' x9 _0 ^7 t0 F; p
1 k/ c! P+ y8 q8 ]2 w
if 4=5 6 is the fake one 9 `* Y5 G9 j& K4 V1 P; Q; Q! P

, ]# F- k& w* d( o. nif 4>5  4 is the fake one 2 H& C  T7 ^# P2 z5 Q% a
  i5 M3 a! k% r0 Q& C0 U5 T
and so on......................

hello1997

分3組4隻波子秤
% B# ^! Q  L" q- _. s; K/ ~( f% w" d/ m
Group A: 1,2,3,4
8 l& y, x7 E" m  IGroup B: 5,6,7,8* D4 u7 K( b0 O! C3 j1 R; ~
Group C: 9,10,11,12
+ V) P# [1 {, \, sGroup D: 13
% O  q+ C1 S. r. W3 ]; @# E# A
4 f! e7 M; E4 C9 R, k) ^, ~Round 1
2 b! Y( |9 f# w# b/ A0 l9 R. hGroup A vs Group B$ p6 ], r# L* v0 b/ o, {2 t
如A and B一樣, 即較輕一粒在Group C or D
! O; w3 e5 _/ W5 a( q$ Y# X1 U$ D) D, H  H
Round 2
/ ~4 }% m$ u5 v- @) S3 O) ^  k再在Group C拆成:
5 O1 s% B2 v! n, `) x  IGroup Ca: 9,10' [& s: z8 C5 V, h# x6 u
Group Cb: 11,123 M  k- m+ v3 [
然後再秤, 如一樣, 即13為較輕一粒.
/ ~$ h% a7 ~. b8 r# U, }- E, ~6 W" a3 D7 B& c' H
如不同, 即較輕一組有一粒較輕波子在其中,
0 ]3 v8 z4 b0 a0 A0 T, k6 \9 v要再秤, Round 3, 之後便知答案." B1 G; ^! ?( V( U, `8 w( m) s

. F6 Q0 f* \8 ~* ^% l6 N/ Fe.g. #1 假設10為較輕的一粒( ^# D) h/ M/ h/ _  ]
Round 1- w! J4 {- D( r9 ?% j0 R. u2 `
1,2,3,4 vs 5,6,7,8 = equal1 q: m8 h8 c7 G: r5 A) |/ W
* G8 I& o/ @; w2 u. {5 J) P! @
Round 20 y8 h3 V$ i( i2 l, A2 M
9,10 vs 11,12 = 9,10 < 11,12  @. ?6 C4 D+ K# b( D0 t+ E0 }
: G  Y0 @8 g/ P) @
Round 38 q' B# M! U) ^5 D
9 vs 10 = 9 > 10* s4 @$ Y! u- q* R7 l

6 J8 q2 O" K* R/ H2 W% aThe answer is 10.& }4 H1 n' T& T% _8 V: Q
) T2 H# {, L& u; u, v, q
e.g. #2 假設7為較輕的一粒
8 n) t$ G; n8 {0 N7 yRound 10 [( T- D6 [, q# X0 N
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8! }8 w' a4 u9 ]* _1 ?/ {

- T( ~- [8 P* b9 ?1 W# cRound 24 Q- |# A' b. ]6 h$ ]: a
5,6 vs 7,8 = 5,6 > 7,8
1 ^- `4 g+ K/ m1 O" z9 e. W7 u
. u3 t# i: f+ c$ KRound 3# A  Y0 C5 L4 }$ G
7 vs 8 = 7 < 8, R  r% K; T$ G

& a- W- V( `# i3 t" _- Y; YThe answer is 7.
% L- c0 F* l" w# @. j& r8 j8 s1 n- v
! \" l( C# K  S" y8 [  L) Xe.g. #3 假設13為較輕的一粒
2 T  p% H* l1 g/ wRound 1
/ i$ T0 H3 M0 X( K6 f8 v+ @- `1,2,3,4 vs 5,6,7,8 = equal
. p9 P  ?- s1 ]. D1 D/ [
$ v/ ]1 c1 @# B9 m, c, q+ GRound 2
- v) Z5 ?( c; O: _1 v9,10 vs 11,12 = equal7 T; ]/ D" G' X2 s0 [9 A3 k; U6 h
8 ]; b2 [1 m0 H
No Round 3
3 e3 X: u- O5 m/ [
8 Y. ?* q, j2 ?. kThe answer is 13.
. U8 Z* E* d. E3 l0 s0 ~; V% a5 x, q$ t0 H2 T; [
唔知我答得正唔正確呢?!
0 j* Y9 H! ~2 x& G4 ~) T( A
. i! p" T: W8 ~4 A' @9 s7 m( D[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:; v( D- H1 w. `( v
1.- g, F6 T' U, i) g" E. N" d
1-6 vs 7-12" s& y( U, O2 q4 W$ d- J* T' w" y
if 1-6 = 7-12     13 is fake+ g  y& n" w, j
2 k" v0 n% S8 I- }
if not
8 y+ q+ N& G, E% N, s: j& D" ]7 E! Y7 ?! J0 h  u
Weight the 2 time
  S; [* i# p- N! @5 n# z, B% V( e( n7 u# A  ~
Suppose 1-6> 7-12* ~/ ^  @+ X7 ]$ H6 a  ~

) F$ v* S: D7 V1 z1-3 vs 4-6
3 ^% i2 l1 U2 J: y. b$ b& y9 x
3 D4 C8 p- P7 w8 XThen Weight the Third: x" q/ w, F1 S1 h" Y& u: A3 q  l
3.
: j, L$ e) l5 f. p
* X: Z+ g- e9 O0 X* zSuppose 4-6 > 1-3
; V; y+ ~6 J5 B  Z- g
7 e7 n$ z4 |; j! L8 VJust like the first Step
" W6 g1 F; a+ Q9 ?
( P" [4 H1 k5 P4 vs 5
6 _+ i- s. |; k5 ?3 A! |2 \' r2 M2 P6 d" i: W; z3 d
if 4=5 6 is the fake one 8 z- S) ?' S1 v* o# Y8 R4 v
1 h5 I7 p, c  L$ Z0 U* ~; V3 c% i
if 4>5  4 is the fake one
0 I5 ?+ B) y0 f% L  _0 N' hand so on......................

  M/ N$ Y& p) W/ V

; G  g; G# I& Q+ s7 H8 f0 r
4 X) J# r# @1 `: `4 X# b( e& r  c問題第二步( M8 J+ I7 q: I$ Y- a% i4 _8 h

! v7 h; E& Z" t2 {7 X2 \2 CWeight 1:  1-6> 7-12
# c  H" n, N% M: L' Y3 n3 B. u+ P* b$ h* ?) N  f1 R% L
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
; L8 L4 ]6 K+ }. g) t
8 m5 l8 t! s( ?4 r9 n6 @你第三步点去搵 7-12 边一粒???
; `- i! [% v9 P3 y8 G: X" o. u$ R' s( Y6 ^+ u
========================================
  K  r- n1 _# b3 E7 ^0 s5 e) r1 }' z% C3 D
問題第三步
2 w. S4 j4 r6 G$ S
1 m# i! c  U# v, e( D: E0 yWeight 1:  1-6> 7-122 j- @5 d% t1 q+ O/ w# w; F

0 k( `9 x' P3 I2 Q+ v$ F8 }$ RWeight 2:  4-6 > 1-3
9 @8 ^. T% k% a* g# l1 m
1 U$ A0 ]6 ~! O5 N( T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