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
5 k1 a1 d( x% q5 k/ T7 q; Q( [; d& K  p- _& _, p) i. ]
『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)。  Y$ T# k0 l9 E# K8 g. F9 b
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？』5 l, ^! b9 ^; f7 |- V6 @( L6 ]9 q: E. G& I

: s* |7 K% q/ K2 e! W7 N注意: / Q( z/ c% ^( H& s! S+ A
6 z5 n6 F; R8 d$ b0 E  ~# P+ 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% S, {; m; X9 ~: R
) W9 x7 l3 M- Z# A* u: s0 p
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
+ s) H* `4 R9 T+ M1 h' C$ ~+ _# |
" @3 `; v5 y2 O& v[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
: r0 M" e3 s/ W1 _! v, ]0 `) F% U$ w相信e條題目都有吾少人玩...

& p3 z* A3 _) R8 l; _我以前畫左個chart去答,
# m( h# G: d1 X# ?" C, z等我搵下仲在吾在" D  E: Y  e0 y* S7 c( S# Q7 T
+ |& |3 z, o8 ~; W: F% I/ Z4 Y
當日用左37分鐘答１２粒波子，差７分鐘才合格。
% B% G6 ^3 n% n1 F0 R13........." V4 _5 Z; U6 c7 q. e) v

% N) h+ M' x4 A( D1 H- 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:
; n; a6 y0 I- @; o. z: t
1 e1 v* @7 ?/ B0 h- l1 M我以前畫左個chart去答,- Z- E" }6 x& u0 {+ ?1 u
等我搵下...

$ o0 Z# D( r( r& q2 G0 {% R

" W: t6 c2 V+ a. `1 c6 G7 a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:: h- a% G) Y& w5 o) J2 o& C
唔識隱藏...已經諗到..

2 _* u  T: B1 R" g$ z
! I0 q. i; S0 y% x6 ?& vsor !!!....e加改左
5 r8 M( r) F1 u; k4 }
) T5 ^( ?' u6 P( ]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
; R2 Y0 B8 `4 m6 u2 |+ |. m/ E6 p
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' |) g7 S/ w. C, r7 U
相信e條題目都有吾少人玩...

. L) {7 b' _  a# K2 L$ n+ s8 p! {7 p: M/ O! Q! C, O
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
2 S0 W0 z) W& M: D* Y5 W. ^& \2 r0 H- l+ f* `! \+ @$ t
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
5 |( K$ n- s* Y- W1 I0 K4 `- @$ V8 @
5 T; Q1 Z2 v' w6 m( l. w" i) ~1 T& m6 J6 V
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
% m+ {1 R+ g6 N6 V# H' d3 ^6 _6 X1 p9 h
Thanks

9 g, e  F: v" j0 b

7 ]) [8 @7 t% Y( w" z9 D) b不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.2 K% t2 Q) f% n) y0 r
1-6 vs 7-12* z" T: |: s3 J" D
if 1-6 = 7-12     13 is fake
) J9 q# ^% n5 o: `4 o% K$ Q) ^6 S% [& ~2 @" E! u4 Q
if not
* G+ z- S2 L, w6 n( d6 X/ M' A/ s: v8 }; |
Weight the 2 time
* _0 H( X7 t7 W' {
5 c. c# O" a7 u# q  ?; PSuppose 1-6> 7-128 E( V# N1 ]7 |4 Z; o. W

$ }. e7 k; T; Y8 M5 d1-3 vs 4-6 * T' ^+ [( E. L9 m) `
2 e- F6 m# U' {; @4 N3 y, l
Then Weight the Third
4 X. f* G) D. P7 Z3.- G( ?1 ~/ A1 u% L+ V# T/ Z, F* s

" V& h4 |7 m, s- M. V. u8 p" h) D: bSuppose 4-6 > 1-3, W- c, [# f+ t8 n5 C

4 b3 C8 l3 F; X. i! T# X" B/ y  _Just like the first Step
2 {+ C2 V1 G- `5 e
5 q+ O0 _* ^3 g7 Q4 vs 5 5 I' q; z- T$ Z, ~5 C- e

& I7 B  _9 M4 g7 Wif 4=5 6 is the fake one
) @: b8 }* v7 g* I* L7 Q& M) \) M2 x- d4 k+ M6 \/ P
if 4>5  4 is the fake one , K! r2 }' g3 C% Y

" m. P" I2 Y+ n# Z9 X5 ^0 h  J) D7 Kand so on......................

hello1997

分3組4隻波子秤4 {) |! R$ U" M& [9 `
9 I! g# Y, j0 {+ [( j7 Z1 B7 d
Group A: 1,2,3,4- C3 u/ d, Y" ~( Z5 L, r
Group B: 5,6,7,8
3 H& B6 e" D+ C- W5 k/ j" eGroup C: 9,10,11,124 Y, F1 m3 U3 j% [9 d6 @. \! Y
Group D: 13% P$ O" _: D, w( G7 X

" N; T/ ^& q  B' {3 v7 T6 G1 ~Round 19 @1 G( o* `9 B% N" K6 ?5 |
Group A vs Group B4 R; r. c5 N& [
如A and B一樣, 即較輕一粒在Group C or D
% w) A1 ?, j- l. X
8 A/ r0 V% r8 f4 ~; c0 K( ZRound 2& H* e7 T/ Q6 @& g% R! w9 @4 ~
再在Group C拆成:+ T& ]0 a' |# g+ V) [
Group Ca: 9,10; b/ Z! C4 [9 ]2 j3 X4 H! u
Group Cb: 11,12& e' k8 W7 C8 N1 `) z8 g& k
然後再秤, 如一樣, 即13為較輕一粒.
( L0 C# P' M) r6 U1 F" V
# L0 o) h; a2 C* [' x9 @/ E! `如不同, 即較輕一組有一粒較輕波子在其中,
. Z5 O% N  C% @( i9 ]; }9 d7 F要再秤, Round 3, 之後便知答案.
; ?% j8 y& p% {* L2 ?& b% F, y" J+ M: K! I* }: v1 J7 s4 K2 _4 b3 z% P& C
e.g. #1 假設10為較輕的一粒
9 l0 [, W6 }# j3 C# H/ k' S% RRound 1
) Y/ O+ }9 r. b" S1,2,3,4 vs 5,6,7,8 = equal. _. M% y2 G( Q8 ]" C$ T8 {' W" P
# ]6 A) b  \& F! b+ M5 n
Round 2, n# q# K. _! W& z: j, `( }. t# a( r  |
9,10 vs 11,12 = 9,10 < 11,12) r" e) b1 g: _' x& y# [
% [% X! F- s2 w( ]) B! C/ P" B1 E+ m
Round 3
9 y4 K- i! b7 B/ E9 vs 10 = 9 > 10) a. J2 z! Y% Q. y) l( k
, R' v  [% f" X6 d
The answer is 10.
4 q! v+ r0 ?8 r
! A: b$ ]6 j, p% `; P/ J' u& Z2 Q; `e.g. #2 假設7為較輕的一粒
, \* A5 Y$ E" }$ MRound 1
1 E/ r! v+ E7 g# N3 e1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
* o  F4 W3 F$ o! |  U! U0 W4 R, y- o2 Y" g: d
Round 22 `1 l7 _8 c) ~' e. v$ D
5,6 vs 7,8 = 5,6 > 7,8
7 F) \. n* y" j5 A/ X( y9 c3 J2 d
Round 3: T0 X2 @+ v5 k" o; V. r
7 vs 8 = 7 < 8
! V1 k- f' J, Q9 Q; u
! e+ O1 T0 u. S' jThe answer is 7./ r7 w" i  e, R
- p- T! n% A0 A. M2 D" J7 s% O+ W" R
e.g. #3 假設13為較輕的一粒0 l1 i/ i2 d; P7 X1 X$ _
Round 11 R% e: A/ E/ p
1,2,3,4 vs 5,6,7,8 = equal
) S  I% d3 d& _" J& x7 s$ h3 N! y! c" R: `& x' a& Y: ^
Round 2
) t3 N# j# K& H1 q# T1 @  x) [9,10 vs 11,12 = equal
, ?/ C$ L  e3 E; n. T% |' t6 \- ~
2 |# Q% }* f$ Y0 S+ KNo Round 3
3 k# M+ j; K8 ^. k4 n5 ~3 p! r% m9 i3 `4 _/ S, ]$ a& C  `% N9 h( ~
The answer is 13.
; a- `3 V% n* A/ ^* s& c% m/ W- g0 A: y1 w2 H8 Q  o
唔知我答得正唔正確呢?!
$ \* ?1 q0 S1 k, \3 c! J* L# y3 f+ c6 G5 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:
- s, R# r" o2 Z  [- O( J7 M' F1./ {4 ?4 W6 Q8 l' E, `. s
1-6 vs 7-12
* R# V$ o" N3 @5 Cif 1-6 = 7-12     13 is fake1 j* ?8 g! \# ^9 h
% k% u# Z2 |* G3 P( }' B
if not
3 N5 c0 |! x: ~* Y4 |; t3 w
! z* I, l( Y$ ]% D' JWeight the 2 time
) E& B) q3 @) P7 D( g" o0 C5 O
4 F2 V0 h) G- z/ ZSuppose 1-6> 7-12! l$ {- m+ N+ S: u8 C8 `1 j9 ^
3 Q2 p& J5 d/ v
1-3 vs 4-6 8 K( I4 o- }, I! T
4 C6 u: i* m& s0 [9 G3 B: _0 y
Then Weight the Third! _- o: t( @7 z! L0 |; ^% o7 C
3.
& h' r1 P" P8 L
& _0 e5 h9 c2 f5 d! j2 K$ D" P# LSuppose 4-6 > 1-3
7 P9 Y& \4 q: h3 Y7 E4 M' c
" r! G+ ?3 V8 N4 uJust like the first Step+ k3 Q$ _: y$ p" S9 T

3 r# e6 M8 P/ a/ f  W( d0 c4 vs 5
: C+ b  V7 i. S" p4 |# \% f- S  l! w7 g0 X/ q0 u& U8 O
if 4=5 6 is the fake one + R2 d2 T0 j) |

  P8 j) `% Y2 pif 4>5  4 is the fake one 4 v' t* A" t2 S2 }
and so on......................

& S% f; d! h9 r( {
1 Z4 n4 @4 b8 o0 Q" F  J

! D. ]: P! Y6 R. f+ e; j* A問題第二步( P& c3 _; n8 x3 v9 x9 d
! b! k; C* O9 D% U- W
Weight 1:  1-6> 7-12; m6 P% W5 y, P7 [

) {& j  z* M/ F" y- D% U! LWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ k, N: i5 ]0 |( F6 l" C% h" [

7 z) F( a3 w- P% z) j6 t你第三步点去搵 7-12 边一粒???3 z( f- N- I1 r% x
$ z, D1 T+ g0 l8 s! ~+ m5 M
========================================
' R0 @. M+ a% g( W$ \! B' [! S. s* _0 R0 Q# {2 {! b
問題第三步
/ ~6 C1 p( x- B0 c5 N/ m; J6 z4 D! |5 O3 Y1 q
Weight 1:  1-6> 7-12. N# A3 o% [$ i) E/ {
8 K  H: W$ {4 v/ E* t1 ^
Weight 2:  4-6 > 1-3
7 l0 Y9 g8 o1 W$ Z2 r( n. R- D4 ?7 Z$ ~# X# C+ \9 N/ 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