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 \  \# T+ ^( T% s( }8 O6 y9 E

$ r1 z. @3 {! X) \2 J& l1 U5 s『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)。0 ?0 D$ x3 k2 N$ f1 \9 Q  F
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 @/ w3 N- s% q0 v6 b; N* t, {
' Q1 v7 y, J% L, Y+ ~* B3 q1 s
注意:
1 U) p4 T+ d5 R! h: L7 H
" v8 H$ p& n. r" D1. 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
- I) Z1 l  C7 z& j: i
  I9 A7 Y4 @6 l& Z  M2. 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
1 ?& V% ?9 e, I4 f" D4 C7 h# c- E9 e
+ B: U: J. S/ S2 v: F$ T- s[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 @  f/ i+ _5 p" z: C! h! o相信e條題目都有吾少人玩...

: a6 U9 d. t" {  h; b; h6 G# P4 d
我以前畫左個chart去答,
9 H, K( G( P+ Z  @9 U& v/ h) Q& M等我搵下仲在吾在5 Q. ^2 C, \9 s

& ]( K  X, F7 a當日用左37分鐘答１２粒波子，差７分鐘才合格。1 a) m8 G- f& f4 l, E* e5 j
13.........$ @1 w2 K( U. N0 j, [

9 s7 p1 `$ h8 j+ K' u[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:' v4 K! @7 j1 @  ]
8 N9 N, R. @, ]! c
我以前畫左個chart去答,& P! m7 _5 M- P/ g
等我搵下...

7 }' m% d% Z; c- n4 i5 ^% ]) s1 e( _. E: V# n- i
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:: f" `, v% Q- I" A! O. N+ _$ Y( Y' s
唔識隱藏...已經諗到..

8 t1 z: E& U: q5 N3 A  j" ~

3 M& F$ e! F/ ]& [% J" ?sor !!!....e加改左
+ @6 Z; Y0 \. F9 W, b% m3 A% I, Z0 I* y3 J+ [
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2 q' X( l1 q' p( `4 W  I8 f' @

0 Q: [: J7 U5 I& 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:  m$ [9 o6 D  W) b
相信e條題目都有吾少人玩...

7 a. U/ p5 r7 F. l

7 p9 L  T* q. \$ HPlayPlay, Let me know later who has the right answer and I will add points accordingly./ N/ Y. d& {% p3 h

( C/ z( {) |% z# a  J  G/ v. J, rThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:/ ?1 a) J' Z; c  f" M4 P
9 q, W: S, x- ^( @
& k/ R. Q& w9 A, U- G- h& Z
PlayPlay, Let me know later who has the right answer and I will add points accordingly.# k% u! V" f2 D6 l

, G/ H' P  _6 W: }2 X' }Thanks

$ q% h! Y& i+ q1 r) E: T& L% c  f) Z/ Q. z+ W# w" F" y
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
; E5 L, N5 t! U9 h2 b( @1-6 vs 7-12. d) i& I9 l  H
if 1-6 = 7-12     13 is fake# J8 N5 ?. {- r3 Z# E" f

# H; A7 h7 O* O- R9 G% d0 hif not 4 T& O- y8 a9 W6 l

- L5 \3 D" C# ^Weight the 2 time
. i1 g7 c# N3 _/ F) K 0 I2 ?+ z) x; C/ ^2 f
Suppose 1-6> 7-12: \0 I8 p, o% L. N, R
9 C$ F  B6 B6 w2 x) V
1-3 vs 4-6
6 Y7 g  g. s- z- G, V
* z' u/ b# x4 aThen Weight the Third
- ~/ J# z6 P3 v- n, G8 a3.
6 ~! H7 W' k9 i* M3 H3 |( }3 N
6 j1 q8 Q! I0 qSuppose 4-6 > 1-3
! D) h6 U( J3 T! ^, d9 M/ d# ]7 B1 t
Just like the first Step
4 x0 {, Z; W3 m- c: X0 S. K, L) n5 n3 w5 T4 ~6 N! q0 g7 e
4 vs 5
& T4 J/ S* s) o9 O: p. x
  a9 M; Q" m. t2 r0 cif 4=5 6 is the fake one " j0 W& a  ~; t0 a
6 G8 c, W- a5 |, g
if 4>5  4 is the fake one : C. [) {8 U$ M* y9 J' ~! K; r

2 {$ B5 O4 _, F- \3 p. k2 Vand so on......................

hello1997

分3組4隻波子秤: [" ]5 \, b4 {
" x( S3 y7 m2 a2 M0 Q
Group A: 1,2,3,4
) [3 E) ]: c. E1 B: Q" Q5 K9 vGroup B: 5,6,7,8
. Q/ c" w2 L' [, {! V4 O4 |$ HGroup C: 9,10,11,127 I  p( |' E# O+ G
Group D: 13
" T5 |! l6 G5 g& z) O+ y8 o9 h' p4 W  t* o1 Q# |
Round 1$ f3 D% U0 X7 }
Group A vs Group B* t% ~- D' ]$ j, M. _
如A and B一樣, 即較輕一粒在Group C or D- K# q7 D: M, S7 m: x( p3 S. a6 L8 A
) |/ ]7 `* m% l: j; l1 F
Round 2. x$ U2 U% R7 z3 V& M9 r
再在Group C拆成:
2 M7 i) G5 `! \/ p# }3 j+ q! j& hGroup Ca: 9,10. B) i1 k6 c. w$ c
Group Cb: 11,12) x7 p1 H5 \4 z) s' f$ u# |, V
然後再秤, 如一樣, 即13為較輕一粒.! ?* v2 m/ u2 j* z
& s6 |+ p) O  M
如不同, 即較輕一組有一粒較輕波子在其中, 5 U, S/ H* Q; ?3 {0 P( H+ P& A
要再秤, Round 3, 之後便知答案.. V0 y& e* B4 y: V. ~$ n/ R5 Z# s
/ a7 p& G0 E. ?& d& }, ?
e.g. #1 假設10為較輕的一粒
* k! u  b7 a+ H# WRound 1& i4 l" c" Z: ?+ l6 ]# W) l5 q
1,2,3,4 vs 5,6,7,8 = equal2 @: [, b8 }% m

* q) W: L( d: ZRound 2
# P. d1 \- h  s0 ?9,10 vs 11,12 = 9,10 < 11,127 N/ h9 w8 o  _% K9 d$ I- c

8 x. z6 D2 V' Q2 RRound 3
) }6 v  u& H1 ]* j1 ^% T9 vs 10 = 9 > 10
9 X9 ]2 k3 a6 d# t# m# k4 T" f8 G) q) L0 J3 u) ~1 h
The answer is 10.
1 M2 @5 O( X# o6 u
, }4 u9 `6 k! r8 `7 C# Ze.g. #2 假設7為較輕的一粒
6 M" ]; e; D& l$ pRound 19 o. ~/ ]& i) N  w  L7 B
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
( Q4 d" @1 O+ \" v& E. Z% k, @2 p5 e5 k: R: a8 w
Round 22 F  V: a" _9 {: e8 I* |- Y" n& w$ ], ^5 X
5,6 vs 7,8 = 5,6 > 7,8
; L# X( ]# m5 O/ I+ j2 }% W
$ p/ b! y# O6 YRound 33 f( W: I7 ?* O6 e2 p5 q( j
7 vs 8 = 7 < 8; C+ r- X, I0 f$ d7 q) X, O0 L" [
* \$ h- P5 O1 [& D8 w8 b5 W
The answer is 7.
0 c7 o# k, k( P8 I  L* F6 A
$ K5 W9 Y1 A& Z' @e.g. #3 假設13為較輕的一粒& E% I) S$ J& S4 f5 y) y
Round 14 u7 {: o* B) k5 ?
1,2,3,4 vs 5,6,7,8 = equal
& s  k( r& ~) n- b6 X  V  X, V4 W* l  G2 e1 O
Round 2
' Z5 p9 _' p/ ?1 n& f9,10 vs 11,12 = equal: [  L4 s( D7 n1 m% n  [
  R+ v; w% u7 I( \/ g& J" `- |" X
No Round 38 Z. `4 \; m+ Z) H5 X

7 S' ]4 T  D+ U5 A* aThe answer is 13.
, |7 m1 x, h5 }
6 [7 Q5 e4 E+ p唔知我答得正唔正確呢?!
6 Q$ u7 r9 v+ |( U' ?8 V, N4 q% D) U" i# f+ H
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
# F0 n( f5 T% ~1.
5 Y( d6 L6 Y' X) _  k1-6 vs 7-12
8 T& `& X( h0 r9 }' `if 1-6 = 7-12     13 is fake% m9 R) b! x: t6 q; w2 z! l0 K5 ]" _
! h. j7 x1 l  [! [% ?; W
if not
6 k) i& h; z! x) v) A) T4 r% _- @5 q  P( h2 S8 Y
Weight the 2 time
0 G; M2 I* _* B/ f5 c+ S1 `$ P9 a  z# e0 a7 W/ D
Suppose 1-6> 7-127 o  @& w: [1 m2 @# n/ ?, e
* Q" N  ^- E) W* B! r
1-3 vs 4-6 % n/ A% e8 B. ?, a# x; P) _; K

+ r- }8 Y/ z9 Q; |Then Weight the Third- J" m+ }' Q7 I- P$ }$ z: C
3.
! M8 m" i8 i& ]8 h6 L$ `6 |5 V2 @0 N( d, r9 c
Suppose 4-6 > 1-38 o) E0 A2 @  D$ ^4 ~, ~

* u5 S6 r% m8 v6 W5 v% s+ a' p  CJust like the first Step
4 ]2 z  U8 |7 b# m! P
, P9 R# l3 A) t/ H. u% x4 vs 5   w& P3 F% N9 g/ t" k
/ x+ I2 O* P, U4 n  ]2 k+ ~
if 4=5 6 is the fake one ! [( M3 r0 j8 V2 N  {4 y# m

* j# K  R- t5 f; E" Oif 4>5  4 is the fake one * H2 {5 ?% G  r: j9 ]; X, }
and so on......................

3 h' d2 Q; g# Q; ]/ Y7 W, R
( ?) h2 w7 M7 R9 Q; ~; a( ^' F

) c# I. Q4 ~4 D問題第二步
: ?/ Q/ P1 D% m" M( u# Y& Z; I' {5 R3 c  S% W9 Y
Weight 1:  1-6> 7-12! D  c0 J# k. L& j/ p

6 N: k, h  j! E+ |Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ t5 S" C$ T6 V- r* @* K7 J; L
* O) b/ W2 d/ h2 {3 u$ S+ G
你第三步点去搵 7-12 边一粒???2 X9 ~! c- O2 g. {
% c% f, y3 F% X: C" l
========================================$ m6 p( S& V2 R7 r# T% y: b$ L- T
8 l, _2 j0 P2 H- i2 G3 S; d0 t
問題第三步
, r: A0 H7 i2 L6 E* E7 i
7 B  I% K* W- `2 M3 ]1 K: WWeight 1:  1-6> 7-12* E, f$ j" I- I
6 D6 j9 c- _" [7 R( F% m
Weight 2:  4-6 > 1-3 : }( x6 E$ r2 G, e( M; N

7 J* j  l$ a5 X7 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