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- z; u0 w2 e) G
! I' t9 p& @3 p$ G: T/ L
『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 r* O% Y% ]2 K- c4 d& I( J
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？』* W" k  ^# X. Y
2 C" K, c0 Q3 J+ P: F* q7 v
注意: / q7 L. n$ V7 s0 V' p& S3 M/ Y
0 Z& I$ f% S# J' y' J
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
! u" E, M, R4 x3 `: Y; t5 T8 Q  C2 _0 O6 D
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9 _. @( G( z) \' [- S- b+ S
2 r- `& G+ e  }0 P7 H
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
( Y, B. g3 y% S4 _: P相信e條題目都有吾少人玩...

3 Y: _! F# e& }4 B* {5 }5 I我以前畫左個chart去答,
# o& L! |$ A1 A5 i3 V, [# o4 r2 W等我搵下仲在吾在- R" @# D1 j  a* t: o# C
/ n- O* T7 q9 Y+ v
當日用左37分鐘答１２粒波子，差７分鐘才合格。" h; q& e' M6 O, z+ F
13.........5 K6 o, v1 x) @5 K0 [+ @4 D
  h9 L! h) A' ?$ G& `) r/ |
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:3 p* N# z0 l8 B/ D) H0 q
; L: C/ I1 y" x  v) e2 p
我以前畫左個chart去答,
* |2 N8 I, Z- `7 I3 r# \& t( t等我搵下...

& X  t/ {4 o9 J: E( ~" }& Q

# Z( P/ M' O8 `$ z7 U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:
/ r1 v# |( n( s4 u; a# G' b. V/ ?唔識隱藏...已經諗到..

6 t2 Y+ l8 u* ?8 a; m

9 h* K( D' H+ q5 n; D5 s, Esor !!!....e加改左
- x: e4 L0 Q/ g& C
4 q7 D1 I% q0 C* d, d/ a! i3 [2 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# w0 U4 b7 Q- O7 V& ?! i
6 [# e6 O; B/ s' l
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:% ]* D  }' p2 r3 w* W( S
相信e條題目都有吾少人玩...

3 t! s5 k: A) D0 n
6 ]* M: _+ m* ^; J6 HPlayPlay, Let me know later who has the right answer and I will add points accordingly.& p2 j$ N* D7 Y( N
) R& O# i/ K2 J& z/ \, ]( H- g& D
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' |& m/ h8 X- N( u7 i% U

0 t6 [* R' B+ Y. o" w( _' o, ^% O& g1 T7 E/ }4 y5 F9 `. `- z* h7 }
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
6 y. k9 h/ i/ E8 R
: @  B, [1 Z" i* @3 r- GThanks

  }& j1 r+ ]. p& @& l; s1 F% F
7 |) i$ G0 q7 n# H* R不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
% c: b, w, A" e4 l! k5 n1-6 vs 7-12
& `# J) n: y. z1 Q& z7 zif 1-6 = 7-12     13 is fake. |3 ?$ s; ?7 L
) e  A# ^+ y( B3 X
if not
; a+ H" K, v: A" x  @& z: r% j% A5 S  q4 ?" Q: w0 J% M
Weight the 2 time : B& T% ]5 s; }9 \; I; D- {  ~
2 O. b' {( K9 v, O! }1 t. W( \; B
Suppose 1-6> 7-125 {; r& Z, A% l

) N) s2 ]9 S2 [  h1-3 vs 4-6
0 U7 F& j* A5 M' e0 J* H: C4 J
0 b& x+ @8 I" Q5 ~4 a7 cThen Weight the Third  P8 K% n( y" ~
3.  ~/ A8 X4 j8 g6 Q! m. v6 f
; ?4 }1 u' d8 V, x, v- R  L
Suppose 4-6 > 1-3
+ g# T6 ~5 q* \6 q
& ^+ K9 \. Y3 zJust like the first Step& [. V7 W5 [) A3 D; I

& f: `. ^, j9 q4 vs 5
4 l# r# ]# o! R! O, W# v2 H9 w0 H! A/ H; M6 z# m: k8 P
if 4=5 6 is the fake one
" |$ s% t$ x+ @2 f! k
2 N. r7 ~; J# ^4 Kif 4>5  4 is the fake one ) f% m- `6 ^- h0 ]! S1 |
% G6 A9 v9 k% a6 s& F" G6 X
and so on......................

hello1997

分3組4隻波子秤
9 x7 k8 M8 D& \
8 `1 @4 y0 D- f* i7 {Group A: 1,2,3,43 {5 K8 R+ r$ z1 M, P. \* {/ L
Group B: 5,6,7,8( T- u, b1 W( Y; J
Group C: 9,10,11,12
+ g% ?* s% I) f3 c; h  DGroup D: 13
3 A! v# C0 I- E! o2 o
5 n% F) |) u% n3 `  Z# hRound 1  d9 H' w# a3 @8 M
Group A vs Group B
( i" ~. }$ I$ p' N3 ^- }0 z% y如A and B一樣, 即較輕一粒在Group C or D
( H' M6 K+ w% a) h" G4 P, s( y) H+ z4 v+ F9 F5 n1 \8 l
Round 29 L! y1 v1 V- ?
再在Group C拆成:
& C0 O1 @0 w6 c, `* Z- h( t0 h6 dGroup Ca: 9,10; }' i5 R; S) z* b, c" @& F
Group Cb: 11,12; O. F7 i* N- D/ v6 y; C7 p% p
然後再秤, 如一樣, 即13為較輕一粒.
# N, _0 ^) a6 U$ Y: i- M1 z' c8 ^( [* i8 j* ]* S& Y
如不同, 即較輕一組有一粒較輕波子在其中,
* _$ Y( b9 W6 q7 n9 q9 l9 \; J要再秤, Round 3, 之後便知答案.
+ d  H4 M1 W$ z+ K2 e
1 P: m0 t' J3 Y5 `e.g. #1 假設10為較輕的一粒1 c$ E* C3 L* ~) t; W1 c
Round 1
& e/ f6 I: d0 f& @# {- u' ]1,2,3,4 vs 5,6,7,8 = equal
& F% p' u. A; |: e7 P$ `& H: f1 r/ y  d6 e8 r( @0 L2 E
Round 2
. J  I% b7 p4 s; F2 |" ~& I( l4 J9,10 vs 11,12 = 9,10 < 11,12+ O) c6 r2 A: F

5 Z& \% _! E+ s$ D5 w6 @9 kRound 3
8 _8 d2 p  X9 \9 vs 10 = 9 > 10; n/ ^5 |; L6 d5 W1 W9 V

2 {% e# t  A/ yThe answer is 10.' }1 {" o) _% n

" c* J' C1 j0 Z# Q2 F2 U) W( ]e.g. #2 假設7為較輕的一粒& X2 u1 b) g' s) |1 w
Round 16 r7 |- K  U; s5 V( G
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
: F2 u% K- C8 }+ O* V( q- `- ?! c8 i
Round 2
! H0 h0 J- G  J4 J4 K5,6 vs 7,8 = 5,6 > 7,8
5 N  h4 \6 p4 _5 K: o, e9 k7 Y" v
Round 3: a" V1 ]# l5 f; P* L' O# Y& E
7 vs 8 = 7 < 8
- Y( |4 K8 t2 n8 Q' [4 \
& R0 H0 ~) O, i* A. e. G: aThe answer is 7.
1 @1 p5 _1 E/ A: i$ `  r  @4 k  R! T
e.g. #3 假設13為較輕的一粒8 x" L2 ^. B: f+ q
Round 1
; o4 q6 I1 d( F& w) o) t% Y$ u1,2,3,4 vs 5,6,7,8 = equal0 h/ F. y4 t2 e
$ D6 I9 U, |; P0 o9 o0 B5 d
Round 25 s; J4 _2 g. }" `# Z; m
9,10 vs 11,12 = equal
) }6 W  P$ p8 \
, C) f: w$ r6 @0 `No Round 3$ E# w) `" d8 G

' j" N* p! M9 FThe answer is 13.% g  P2 U% `3 Q8 n! f

5 N$ C' F6 f" T$ [( h唔知我答得正唔正確呢?!
, {# s! M# s6 V( Z% ^9 T) H! a- J" u* }$ v9 y% P7 k
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:  @) w- x2 o: l9 p; f7 F4 K: N* O) s
1.8 b& Q) u) l7 i8 c9 |
1-6 vs 7-12
; U9 n& h8 F$ w( s$ x# wif 1-6 = 7-12     13 is fake
5 S& G% x5 c9 t9 j" T3 I; K7 @, }  a3 b; P! @
if not
" k( {3 _6 R$ B2 |& Q; a4 f- I+ c! h4 c" \5 Q& {
Weight the 2 time 5 e, u- ?- T2 _
7 J/ U/ F$ F9 ]( |9 J
Suppose 1-6> 7-12/ S7 h, O$ |; I. `8 n& u  Q+ M

7 c2 K! P, O* J* X+ F1-3 vs 4-6
4 e/ o) T9 Z3 z' l& E& I
& M. i  G+ }5 i# }Then Weight the Third
3 w4 I. i! O4 w& w& f3.
* M5 Z' n4 b+ B$ J" y; g. `. C& B
Suppose 4-6 > 1-3
3 L: D0 n( T9 E/ p8 P$ O: @6 U) J" ]; K
# B2 Q# p0 e- L( A! G7 `8 UJust like the first Step
) ^" ^# V; u1 F/ h+ A+ o7 \
' k3 Z7 S+ Y$ b/ P, g+ Z4 vs 5
* S# z! Q* m, h' _
0 |7 m! f6 z" S7 K% cif 4=5 6 is the fake one 0 c+ S* i/ ]5 [  }$ o

8 N6 \+ G5 d, `( ]4 hif 4>5  4 is the fake one
4 W/ e  M( o9 ^- j. u6 B$ jand so on......................

3 l: b& c6 D2 M3 H& Q

9 t# W. Z0 j0 g4 O% K; q$ x8 R, [) w4 |4 [, W1 A
問題第二步
6 R' T$ C( L8 N( r2 U% K. u3 _6 n. S. @6 h; |8 h! t1 E5 V
Weight 1:  1-6> 7-121 |; ]! j* n+ b  L
8 A8 j  w. l0 f7 R( m9 S6 @
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ ?/ `. v' O4 Q  |

6 p1 f0 T8 S' r+ [( t: d你第三步点去搵 7-12 边一粒???* i/ S7 w5 c7 J4 w9 N  C
  m- W; ?( f, l. v1 o
========================================
9 Q- `3 l4 U, e4 ^
% q" o& r; G/ `- d) _問題第三步
$ u& t$ M2 v- v7 h9 D6 l* Q! J& V. p+ G; V5 N- p
Weight 1:  1-6> 7-12. \, p  Y6 @7 ?9 _$ z$ u2 L- S

7 w& v- G  j/ E* HWeight 2:  4-6 > 1-3 ! h8 W! O  Z& R

1 ~' q4 A1 m% q$ r! K% ^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