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 t/ E+ \4 ~  k4 ~9 Y( ^6 O
( d% M! \  ]  n. A  ?5 V『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)。
: a* X* _* p  a& x3 T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. i4 }6 S* f6 I7 g% X
+ Z+ D  R% e. N1 y1 d9 ^
注意:
2 m& J/ W0 F8 C: R0 y/ X* z) S6 q; a( u8 `) \
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
( b, w# S$ {! V8 b0 @
; p, I( S9 Z  [$ F/ 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  , hide 字要連埋 , 內容 = 答案2 y1 R6 e1 l/ X, s0 d5 F
: u5 A' C2 v* {$ Y7 R: W
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:3 u* R& F3 [' i$ p
相信e條題目都有吾少人玩...

/ W1 D2 |8 g" v0 y! {+ {
我以前畫左個chart去答,& \1 x( a% F* ?. k) z
等我搵下仲在吾在6 p; A9 j* H2 j9 P5 Q1 F

- [7 o) k: K5 y當日用左37分鐘答１２粒波子，差７分鐘才合格。
& q! n8 e" u& J$ I13.........  A! V# ~+ V  R* n

- ^; Z1 j1 K  |1 P9 G( {- X[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
% c3 ?$ _! Z# p0 O9 s/ v. `
4 |; J5 ~$ H1 Z6 U9 Q1 |我以前畫左個chart去答,
" ~) j3 A5 t$ K+ l等我搵下...

7 x7 G8 W' I- f* E5 ~5 ~' D6 V$ d6 ^5 _
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:- y7 F+ G0 S: \3 Q% ^0 f- Z& D
唔識隱藏...已經諗到..

5 y* f3 |$ p# `7 L0 C! W$ o% F$ Q/ g5 ~& ?0 k4 K3 [
sor !!!....e加改左
0 \- [7 g4 [  T( T. ^' j; d. S4 Y( f- r- y& _3 {
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) R& D# O* w' ?
2 L2 v( ]% K- ]) w
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:/ g8 Z% M7 Z  Y" t
相信e條題目都有吾少人玩...

- t$ r: r6 P" p' x# W1 F7 H+ U" e) a! o2 p. h3 \! h
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
3 k5 x9 @7 }# X
9 Q8 h: N4 f0 A" QThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& M* F5 c3 r2 M! y) t. C
* L. Y5 q. H6 j) x9 Q: \

# Y# e1 U) Q# T- z; n6 V5 tPlayPlay, Let me know later who has the right answer and I will add points accordingly.+ X0 T" v$ E, K- T% A' h

$ P5 t1 ~! u$ f6 Z" |Thanks

% E6 S  N# H1 ?" w7 q+ a: L

% S* R/ h6 g% g9 g8 H1 U/ I不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.+ ^6 C0 ^3 ?6 t/ z: e; F, J& t; t
1-6 vs 7-12- k6 R) s& h4 j% L( Y+ x
if 1-6 = 7-12     13 is fake
$ x6 i9 [0 k0 u& M" N6 u% \( K+ ?  P, ~
if not 6 M1 q/ o. B0 Z) M3 c/ |
! o3 @. D9 o4 z  T+ B5 a
Weight the 2 time ( [( t- ~9 C. ]/ m: B/ n% D7 L  m

: R' U- B2 E' ^; OSuppose 1-6> 7-12
8 }. o; {( o0 ?* r( Q9 s# V6 h9 w" p+ j9 M7 h
1-3 vs 4-6 ' u+ d# n. j! A" T3 [4 `" s9 d

2 @# ~3 u5 h) ~. d# i  EThen Weight the Third6 r9 l. T! @2 o* l, U8 U- n; D: o
3.8 {& Q* j5 Y) u  t  u; O
! C- A4 N- n# Z3 p* y3 `
Suppose 4-6 > 1-3
: ]1 b: N5 n5 C( r
0 G: j2 _$ g: M% K! ?+ G: ^Just like the first Step
$ S8 i4 h, C- x5 D; h6 l$ V" @+ y& j# H
4 vs 5   E5 ?3 P. o  C5 k
6 d: w! l) N- u- d! G7 v
if 4=5 6 is the fake one 6 D. y- u$ h9 ^7 n9 b

! J' ~1 p$ @6 b* A+ ~% U, qif 4>5  4 is the fake one
" E0 b0 W4 M* h
' F1 Y, K6 G6 l  q, @& hand so on......................

hello1997

分3組4隻波子秤
: s& m- B. w8 d1 q0 _# _8 F
  _1 y" V( T  c* X# t; }6 r6 |Group A: 1,2,3,4& t2 n1 d$ ~& n1 r  B' ?
Group B: 5,6,7,80 W1 P4 R) B7 e
Group C: 9,10,11,12
( Q& ^$ E6 Y7 y2 ]Group D: 13
5 V% R$ X- t6 ^$ e1 A1 s! L8 C% |; N% W8 l
Round 1
* |- f. s, ^8 W) G3 g1 ?6 QGroup A vs Group B
9 e, y9 o4 E' g" G7 B9 u如A and B一樣, 即較輕一粒在Group C or D% k3 o; K- O' p" f4 h, u  r* I& z
3 K- V  E! i2 e* H% ?
Round 22 R$ [0 V+ ?, K! l$ L
再在Group C拆成:
; h: W. K0 ?3 f- |7 M, J3 RGroup Ca: 9,10) Y+ M; s) M( W& `
Group Cb: 11,12
0 ~9 b  Z9 E5 \然後再秤, 如一樣, 即13為較輕一粒.
, F* @1 H% e8 W; K; H* Y* e; a! V6 {+ e( l) t* ]3 p/ p
如不同, 即較輕一組有一粒較輕波子在其中, , f1 Y. e' v( b8 S$ f' ~
要再秤, Round 3, 之後便知答案.
8 H6 R; m& C, Y* I+ n) i- u$ {  M1 N/ r, n9 R% P3 M/ O, r
e.g. #1 假設10為較輕的一粒5 i' R/ M8 h' h/ l4 R
Round 15 k5 Q5 q4 Y. B3 ]
1,2,3,4 vs 5,6,7,8 = equal
8 U4 j% Y% b* N1 @# E/ b6 N5 O( \6 Y& V! I% I6 ]/ I( ^8 r
Round 2
  _7 X  ^$ E8 g  \' P- o* I9,10 vs 11,12 = 9,10 < 11,12
1 {; B# l; P  f& D' I
/ \6 ?/ |$ V+ g$ N* \9 {Round 3
& k& W1 @' a3 ^8 w5 @& R9 vs 10 = 9 > 10
* X# V! b7 d7 I; ]+ W# @
5 d+ N9 v8 g7 J8 r1 vThe answer is 10.
9 ?  t( _8 Z6 u# k# o- \
2 W# Y: F8 h7 N8 [2 q0 K& |) Ge.g. #2 假設7為較輕的一粒' z* P3 \" H+ }: }
Round 1) E' p* z+ }+ ]3 W! |
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8  V* J2 m; S6 f9 a6 `4 S8 u5 a
4 s( |/ d* v- b+ z0 |4 }6 U2 G2 }
Round 2
9 U! K. C, ?" f( a3 m5,6 vs 7,8 = 5,6 > 7,8' R7 C: m* G2 C( k+ z/ K) B) o* S0 k  Q- G
4 ?+ R0 y- v4 C& L
Round 3/ F, Y& Z0 L( k  L  \5 g- Y3 ?  k
7 vs 8 = 7 < 8  ~5 N1 F& d8 U

. S  E. C" I5 N  P; G' DThe answer is 7.
: v) _% i/ o, Q6 B) T, c% e: ~# u' q6 R  m! _
e.g. #3 假設13為較輕的一粒
+ V2 z; T* D: NRound 1
. \7 K+ `) Y! X4 ^& N% W( ?1,2,3,4 vs 5,6,7,8 = equal, J4 h. z) x" Q7 U; c8 w7 Q

* v0 v" p$ H1 WRound 2
0 l; S! P0 m. g# }( K  j" T: p9,10 vs 11,12 = equal8 K6 l9 z! M5 }( u% r

6 `/ B& y) n8 yNo Round 31 N9 x9 L$ u$ `- q( {' P" Z
5 P$ ?' B* L7 z0 d) r5 q( ~; F/ P
The answer is 13., l; [! S/ h, f
0 E( Y  x, m' d
唔知我答得正唔正確呢?! : m. p) }3 m0 h4 P; x

1 }; `+ j! C3 Z+ u[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
5 }1 x1 j3 t3 B1.; w8 o$ N- G" M: R) Y" G
1-6 vs 7-12
2 \" j9 m9 j6 jif 1-6 = 7-12     13 is fake
  Q8 w0 o% N  G2 |% z  j0 a: _/ T1 k: G" d* r$ r! C
if not
, b& `2 G$ }8 t+ K: M2 S1 ^( X6 G: f- E* }! |
Weight the 2 time
, q6 X+ k  H" B, w5 B9 b- j/ |$ F5 w
Suppose 1-6> 7-127 n1 h+ a$ ^, p
" z# u* I" D# C& c, s. C5 B
1-3 vs 4-6
( e) b/ g2 Z0 u+ u& f4 J4 u: `7 o' }7 E7 i4 r3 W$ L
Then Weight the Third' h9 H+ d. X" ^: z  f
3.5 h! B% k8 G. j
& Q1 _! X& a0 o: Z
Suppose 4-6 > 1-3( B% \9 W; C0 w
2 E( s% Z% `+ I: k$ J6 N
Just like the first Step
( w0 [8 Y% T5 r, R7 y2 O) F, M; U
) }+ H! G( n# g, L  l* Z4 vs 5 7 A2 r+ ]! q& p' D! ]

- e$ ]* s+ _2 T% y$ o) N+ aif 4=5 6 is the fake one ; H# h/ N: {/ Q

$ M. s' a8 s2 D9 B5 l: M8 Pif 4>5  4 is the fake one ' C8 I- L2 p8 `9 U, c6 V$ V
and so on......................

5 M" O  l$ W  v6 _; h
7 D; y& [, Y7 a5 @4 Q/ I+ l( R6 T2 i# X* V) @
問題第二步1 [% T" A5 T' y, {+ F
+ k6 P# o' W: s# l
Weight 1:  1-6> 7-12, K) g, E- F3 w' c& f7 W1 A' @
/ v( I* `! }: S' l8 W2 z9 T
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
( {9 o! s, v; t3 g6 A* ]% E, |
7 w/ H! M8 Q$ c2 Y你第三步点去搵 7-12 边一粒???6 N, W0 }9 w! v8 ?- v

# p+ n* l/ U& v& q8 U5 @2 \========================================
! ~- @) p1 b5 z9 a2 ]0 x8 F% E; m5 @* W' @5 l
問題第三步& W( n/ ?5 E( u0 S

. g: s6 P$ C5 t; N9 L* k/ }9 lWeight 1:  1-6> 7-12
3 G$ W' M  {( S# z& B" u$ M! @4 \2 M, o
Weight 2:  4-6 > 1-3 7 X8 g, C# b6 V  i* {4 n. E
2 Y& L6 _! d) l( r, ?" _2 n
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