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6 \/ b( ^6 R( \, i9 z
. w* z1 H( k! ~$ r
『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)。
7 h) G+ D, f5 ?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？』% {' M( {( S0 @* b( y$ W# l
, J; m, @7 |. b
注意: 8 @% J" ?8 @& x. }
. C: a. X' e9 z
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
; ?# n+ ]1 s* q, r& ]3 h
2 e$ B. B" Q! P6 t# l7 l% i0 x2. 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5 F+ U9 q- t! I

. h, b! e3 p) ?, b[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:4 ^4 O" _" F7 L* n4 {) T3 U
相信e條題目都有吾少人玩...

! a9 j7 x6 g/ Z9 w我以前畫左個chart去答,1 E5 E% n, }( b+ ^0 K- t
等我搵下仲在吾在3 ^5 G  t, B# T/ s) ]; U
2 h, u# G# P4 [$ F0 O7 _: ^5 K
當日用左37分鐘答１２粒波子，差７分鐘才合格。
2 J0 M# X: j7 P( U/ x+ r13.........7 b' u0 X% E% e' o8 U
0 \% i6 T* G- U" {9 L
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:1 E' i  ?/ u. b2 y( O# t

) f9 Y6 q1 [: W1 u( p$ g我以前畫左個chart去答,
8 y7 P4 }( c- w9 r+ _+ g2 t等我搵下...

" [1 T1 g+ L" S, a
5 h  Q& t! m- \% b$ G: v) S& G
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:
- @: G) @7 j) w; p唔識隱藏...已經諗到..

5 J; |  D, _* A! T: u% f7 G4 R
. j& g2 l, J5 E/ j  |+ L& V( u
sor !!!....e加改左+ R) a* Q; ?3 H$ ^( X4 z$ o

# Y2 ^& q) c: J/ r, p& D( G: _4 Z/ L3 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+ ?, q$ R( T# R5 @
$ c8 E0 g5 M  K( d5 w* E- ^
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:8 \( r3 j2 E4 T! z7 v2 W
相信e條題目都有吾少人玩...

7 F  k. n  s+ l! ~9 |. ?2 r4 L3 o8 R) \' I
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
( Y. @% ^& H6 d+ A: Z9 ]( S, Y# D4 A6 n- p
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: v2 t* W: k" Z( U& U  d

. C. Q6 F6 k3 K. I& u5 D6 k# v  _/ \3 Y3 \2 |# Q
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
) S( t! J4 {6 D$ I( \8 J
( W4 r; O$ b8 d8 E9 p/ V  |Thanks

! E+ m! I: p2 b/ {. V& {) k9 E* o& T$ W4 s7 E9 d# F2 t
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.' a  Q2 N0 y9 Z: N+ Z
1-6 vs 7-12
0 [3 G+ w" s+ e, Jif 1-6 = 7-12     13 is fake
' i, y' \* ~8 M7 ^+ h& S& B4 [$ n9 C) J- a! ~3 I0 ^5 W1 L
if not ) t, o% z8 j* D, H& V" Y
( P* D0 T+ x: e
Weight the 2 time
: Y  V1 j9 n5 ^9 a1 d9 I; y   m- [+ Z( X, \  p4 m
Suppose 1-6> 7-12
& J6 A1 {; U0 `
+ e, ]8 G, L, I+ a1-3 vs 4-6
. }/ g- W# |( K) `7 z
! B' w( R5 Z+ A" n5 y, f) v4 SThen Weight the Third
1 V. K! v/ n' W" @# X5 u' C2 j: k4 d3.
6 N  R& `$ R6 u/ r3 T- ~, o& q* h* k/ R6 \  h% L1 E
Suppose 4-6 > 1-32 _, |: w* s; K( O
& V; E) [9 e2 `$ `) Y0 r
Just like the first Step8 u0 @: ~9 {) q" N0 x
: a: W# K1 t* H+ @9 B1 L
4 vs 5 % J1 U' J- {6 b2 B9 I
7 d6 y5 R, H; ?$ [
if 4=5 6 is the fake one
7 y6 f( t! y/ `& U
4 }3 A8 u; j7 S6 i' |; G7 xif 4>5  4 is the fake one
; L3 {7 z: @3 {& |4 k
' W$ m6 Q  }9 k2 A) Q# J- Yand so on......................

hello1997

分3組4隻波子秤+ |- q2 a2 t' B' t5 n

$ \& h# Q+ j9 U8 V9 G% N; ^' Z% z7 gGroup A: 1,2,3,4
% o; \8 ^: [; @Group B: 5,6,7,8& X- c! f* V; h+ E5 k7 [
Group C: 9,10,11,12( b5 f6 q# H+ Y' P# p8 e: i' o
Group D: 131 O* Q9 J! T  o$ Y5 _) T* m
- [; k7 A& H- d% Y2 e- m! Y( q+ C) O$ P
Round 1
4 @3 R/ S9 C: ?8 K/ i5 w1 F  `Group A vs Group B  g- Z* i9 F0 o* w8 @! T% k+ r) w
如A and B一樣, 即較輕一粒在Group C or D4 P- v) O9 |+ F( S" p. H! h- K# M

1 d" x( ~) g3 B4 ~4 z6 `, yRound 2" e+ h2 c% r' E  I5 Q1 l2 U/ C
再在Group C拆成:
* A8 Y. |% F# OGroup Ca: 9,10
) t8 x  c. Z! T5 X# H& V+ j' `Group Cb: 11,12
5 j' D) i' `  {# X! k: f$ e然後再秤, 如一樣, 即13為較輕一粒.0 Y# V0 U3 m% L5 [% a& f
# s8 s% I. M/ r- `1 d3 L# p
如不同, 即較輕一組有一粒較輕波子在其中,
& o( J/ ?2 N$ `7 f: b, ?要再秤, Round 3, 之後便知答案.8 W3 f0 u( Y; x/ d/ \) Y9 N3 ~
% J7 t1 r7 _1 @* @
e.g. #1 假設10為較輕的一粒) n/ }# X: P' ]* d; V
Round 1+ n7 X8 g9 E* j
1,2,3,4 vs 5,6,7,8 = equal& I8 g  r2 H% G8 `, i) V5 t; h
( G  Z- F8 O# a) n3 ]3 h9 G( {
Round 2
8 J$ q" K. N: n! @' L0 C9,10 vs 11,12 = 9,10 < 11,12
2 P) y3 K; L/ `& b7 V! b" C1 D) d/ d7 I
Round 3( f7 o" `. D/ `* q( D, b
9 vs 10 = 9 > 10
* L& E* W  G5 [% b7 z$ M
' c" w2 k6 c. Q8 GThe answer is 10./ I1 W( b1 v. A

9 [, ]# p  I! ^- j  Y0 Y5 f" i; Ze.g. #2 假設7為較輕的一粒$ }+ X3 d* t/ ^) ~
Round 1
  b2 {8 [: n, j" a) i; G) r1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
6 Q# z5 e( _4 q; @: X/ _( j' o" s1 v; [9 O! I: q! g/ I* V
Round 2
; ?! \. a4 @; b+ a, W' O5,6 vs 7,8 = 5,6 > 7,8
3 U; t8 ~# U/ X- L
1 q# _: j6 I, B6 p( ?* l6 O% \8 CRound 3
6 U$ G4 b0 {+ R6 j4 n! b6 d) Z7 vs 8 = 7 < 8
0 j) ^+ w' u% y) q: w1 U
. ~, U+ I# G5 q" Q  W# N9 S! {The answer is 7.4 ?: q+ l* H: r- k; |) s8 p
  S( U4 q* j; _/ e- z9 S; [
e.g. #3 假設13為較輕的一粒! A- a* {) h9 z0 b) z& \
Round 1! w- l/ P+ x* s) O3 A/ i
1,2,3,4 vs 5,6,7,8 = equal) @; ?: V3 |" |: t9 Q

9 x6 Y. a' g2 S& b9 s% M8 cRound 2' x$ `; W7 ^2 t7 c+ p7 H+ V5 X
9,10 vs 11,12 = equal* ^3 R+ I# ]7 R) D3 [
5 @3 T: g: [( N# R4 E* V6 Q$ ?
No Round 3& @% U3 H' b- J7 i) [

8 j! h8 S9 r% O, H. B& o; g  gThe answer is 13.. I0 d" e$ v9 C( a- c9 X/ s
+ q/ R3 I8 h( f
唔知我答得正唔正確呢?! 7 Z8 p# A9 X5 b9 n5 r, H. }
1 l) h/ I0 K# t5 e
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:: N  f6 M2 u- b$ ]! z
1.- R4 H, p2 g. M3 [
1-6 vs 7-122 }# [/ r4 I' F, k
if 1-6 = 7-12     13 is fake* ~$ J: P1 X# Q) a. K* L
1 Y4 f  V+ W" {8 o4 E
if not
0 G4 k7 A) G2 R$ }& ~0 e" {+ z
5 d6 y' `, i* {) b) j$ iWeight the 2 time
* O" Q% o3 |# z  i: O( y2 i# w9 A+ {. x" T% R0 m
Suppose 1-6> 7-122 t( \4 Y$ d# ]; Q$ ?; ^
9 J4 E: Y  R; n+ m% x1 e- L
1-3 vs 4-6 $ x; w  q, x# `9 w7 O6 V1 W
0 m9 C' Y+ h" d9 ?) V- w
Then Weight the Third7 ?' [% S- y, f! ~
3.. w  K8 }/ X& M7 R7 o

5 o3 O: m1 J3 B& \1 y' {Suppose 4-6 > 1-3
) C: T1 T/ U2 |  x. z9 K
) R5 ~# S& w: `0 [; P' `Just like the first Step
" f$ v+ C. _! J9 y4 e* ~
: e: ]  n9 I4 A; u. L" Q  S2 `! v3 n4 vs 5
- t5 W6 b1 B7 v8 s& w( i
; P: B3 ^- j- W) \if 4=5 6 is the fake one ! E3 m  k- @5 l8 A, K" \" H
4 t2 t: o8 W$ _' c$ m! s$ U
if 4>5  4 is the fake one
+ @4 A" s# `$ G% xand so on......................

, D- M. k# s- p4 i# E) i' Y0 g( H# ?8 L% Y7 z

8 ^) }) i, U+ S  Y2 ^問題第二步+ ~, E" U# M: m
. g$ f* f% b9 m4 r/ I' P; T3 `
Weight 1:  1-6> 7-12( a& O% C3 z6 o# w3 m' \# d. ?

) l( o2 S% x5 cWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6: r4 R2 j9 @  m3 v6 I

1 k# [2 T, V- M# L你第三步点去搵 7-12 边一粒???; P7 d/ _( l- w! f$ Y5 s

2 H. a' ?$ c: C; i========================================$ N3 s( `& C  R5 j. U" w0 s

7 q1 ]5 t( t1 F' r* r問題第三步
, b% \0 ?  u2 s$ S* k: D
% L: W+ e9 X1 x+ t- c; `Weight 1:  1-6> 7-12
$ X. |, w1 Y9 n* x( I* l" y
3 E8 u- g- e4 Q4 p9 xWeight 2:  4-6 > 1-3
8 D* c$ n" A  ]7 q# M; t" v
. P- ?4 u7 `' w2 e) S4 b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