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/ r. o0 T1 e! u
! c- X# V& o% g
『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)。
) J! l- k; [) W6 R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？』( \' x% |' r1 f9 o( |; o# [3 N6 M

; Z* g! c' R  i; d/ {注意:
  V7 r: Y4 ~* O
  p/ W' m: L% a( x" ~: `7 H1 {) v1. 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& r4 I. H8 |, O5 q8 M

  _6 R1 @. i4 B. X, t& T$ d' w2. 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
/ f4 Q+ l2 k- L% V5 G' q+ Y7 w- A
! L: m7 @1 r0 U5 g* v8 F1 l) C[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:# _  i3 y: c" D; Y! k
相信e條題目都有吾少人玩...

+ ]; }3 H) V% {( P7 d3 ^' ^
我以前畫左個chart去答,( C5 U8 t: W' ?! S- S) `+ g7 V
等我搵下仲在吾在9 ]& f: _  |( r" I4 y

' }  {- U+ z5 e( a  K3 V當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ w* H  d6 c  i# [13.........) |( `! m- H' [8 l" M$ N
) J7 k; N/ e/ m; v# ~, I/ b- Y8 p
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
- m0 S- O$ u6 t6 a: w  n2 @- g
, P* K' @+ S8 n) i! l5 S0 v1 O我以前畫左個chart去答,
5 ?6 ~6 z( G3 \$ v等我搵下...

2 a+ n; B2 i; d- g5 E) f

! v' Y" `# `* ~( q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:
( V/ o9 @: X$ C" J$ Y唔識隱藏...已經諗到..

, i% A4 ^* f5 K& m+ ?6 z

- \% l, T( V, G) t* \% P  v: Asor !!!....e加改左
0 \6 p- Z" i3 t1 O/ i
; b+ V! d% f: k3 n( _! ?7 |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
* H5 x- }' N# \! p# h8 @7 O* X: k$ Z5 w; c' N: H2 U0 X
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' o% q5 x" S! A* r' O& r& B
相信e條題目都有吾少人玩...

. g1 F1 @5 \9 ~5 l+ P: `
2 D; H0 N8 B  r
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
) I% k" e6 X  I* |2 [; j# q% X" M
9 [4 t7 U1 A- k8 B  m% @8 V; aThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
( F6 h+ f8 U. ]$ E
2 w  d% v, f* `9 c0 y4 u1 o! n8 E1 v* J# W; V
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
; d' c/ Q1 T+ Y+ n# j6 f3 R) n! N. m7 {! @; b1 U
Thanks

& S' X  h2 ?# S' V( O
. A: U: b8 ]4 j# p  o9 ?2 O. U不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.) L! f. z6 F% N- b- t5 ~; L
1-6 vs 7-12
5 `6 F5 ~7 U3 c' }if 1-6 = 7-12     13 is fake
$ C* H9 `3 m9 ^+ I6 [" ]) s* v$ p" U( N* U% ^4 a
if not ( Z0 \/ T4 r) r

- e% r/ S4 t; J. |# pWeight the 2 time 3 k8 @% `3 f) q1 x9 E9 }
/ h6 m$ z5 c+ d  ]6 }8 s
Suppose 1-6> 7-12- Z+ B# m# Q3 |; _( O- [" d

- j$ n  E) N" Y& E$ V1-3 vs 4-6
- J! }( u7 J+ Z- ^; r7 d* V, D9 a5 z$ I+ Z
Then Weight the Third
9 p( T, r/ q. n$ d2 |# H7 W3.
6 [/ L/ {$ j# M4 R0 q- R+ f( b* l
Suppose 4-6 > 1-36 [7 V+ v; Q( _1 L: k
! K) N! ~9 e. B- @: f% r
Just like the first Step* k% \. l, f; n! z0 G( N
- n, y. D0 n; y: D7 i0 |- x3 [; y) C
4 vs 5
5 }! w0 v$ c# j- B7 c  e! M5 x' X) b; v( p
if 4=5 6 is the fake one ( C; I) ]+ o9 z0 Y0 r, X

& [- B" u' N9 m! z' b  Oif 4>5  4 is the fake one ! H7 ]+ @8 ~- o; l

' Y/ Z1 d. S. D+ B  b; C0 Wand so on......................

hello1997

分3組4隻波子秤  _. x3 v3 d6 s" [( O5 o% h8 X

" H' V4 \+ f8 G) h- _6 S+ J" L% NGroup A: 1,2,3,4! i# y: p4 m& ?' w+ h6 t
Group B: 5,6,7,8
% A: M$ [% g" X4 ~+ O+ ~Group C: 9,10,11,12' V- h* W2 x9 a5 b
Group D: 13
- o2 z6 e9 b* [, n$ [$ q% H' r3 J- K0 k: l3 @
Round 16 y- O4 l$ V, E7 [
Group A vs Group B
1 k& Y# i# c6 r$ E: @如A and B一樣, 即較輕一粒在Group C or D
+ X* k- H6 q' K0 h: n- J
# E5 \  r( F+ ~. t3 X5 A( mRound 2" R; c( t) U  l; g8 P2 \
再在Group C拆成:' @7 Y1 y8 o: S
Group Ca: 9,10
$ y; f1 b+ w5 x* n- I; U6 f* M8 H# |Group Cb: 11,12$ R8 u: M- d: I! r9 Z3 m) C: @# z
然後再秤, 如一樣, 即13為較輕一粒.4 N, q5 F7 K. q" R2 @
* h* m6 {. m  [* ~" ^
如不同, 即較輕一組有一粒較輕波子在其中, * E5 E7 B3 f1 a! ?
要再秤, Round 3, 之後便知答案.5 r- m' s+ M4 o
, V9 [. G9 N' ?6 g' q8 t. M7 G( C
e.g. #1 假設10為較輕的一粒7 B2 z6 z# P; A- T) k: l
Round 1
( |5 T5 ]: }% ?" [5 B1,2,3,4 vs 5,6,7,8 = equal! |- ]/ E0 D% p4 i( V

2 `0 \# a" N5 g; U" HRound 2
8 b( w/ a/ _5 o( b, s8 Q9,10 vs 11,12 = 9,10 < 11,126 \. \  ]9 I7 }' e9 ]$ h
, r8 D4 b0 x+ {+ l% k2 i! m
Round 3
5 }* ^7 F( K( b# F+ t9 vs 10 = 9 > 10
( y9 A* @+ T& s) E" L
/ m, h) l6 x' D' ^: @2 jThe answer is 10.9 }; d; z' i/ ?+ `1 v0 Y" j$ I' d. o4 n

7 I" X  a/ Q  J8 }6 \/ ne.g. #2 假設7為較輕的一粒
, c6 p7 b& F0 T- E* [$ ~/ jRound 1
  v% D/ W8 t4 M6 O3 A1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
9 \; y4 I3 C- a' w. |0 d- ^# A5 N3 c  t) o
Round 2; C+ L' a% V! C( {! J8 r% K7 {) x
5,6 vs 7,8 = 5,6 > 7,8% \/ E4 n( b/ I0 P6 I' m! ]* x. X
# L8 c, B" S) E. r  t- b0 U
Round 3
* \, K9 z3 j& T5 H; s7 vs 8 = 7 < 8
1 D% D4 s  M+ A, x* }
3 t6 Q- z$ C" W- f! hThe answer is 7.9 P0 d4 q; A( j4 Z
7 t: Y4 E+ P* c/ b9 ~' ^8 l& l
e.g. #3 假設13為較輕的一粒
1 |# J* u6 l4 l  e/ J3 KRound 1/ [) G& w( v4 Z, H3 ~* g7 V
1,2,3,4 vs 5,6,7,8 = equal2 I0 Z3 a, `* Y5 l$ T2 B

& h% j  B0 S) K1 |1 M7 j# T  ?$ dRound 2
5 q( k/ B* p6 _2 r# |( V: A9 V- K! J9,10 vs 11,12 = equal
' o; G3 }0 u7 I, l; G# S; D
/ {8 B' b6 a) U+ h& y# fNo Round 39 i9 e3 q  U. ?- a. f) `
2 h- o$ J3 a0 D) u% K8 O  b7 _
The answer is 13.. b" C1 c' T" q5 E
) e  X. [5 M4 e! |; z0 ]. f
唔知我答得正唔正確呢?! ; Q( t- c, U' K/ p3 [* R) f
! W) u! t% S; E9 Q5 g
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
( j! {4 g& z2 a" V9 D1." Z. W: t3 @6 `6 b1 s% F
1-6 vs 7-12
" l/ O6 |, s- F2 r. v1 [if 1-6 = 7-12     13 is fake
9 U% J, t* i3 F0 F- c6 p* i+ s* k
- Z  v6 ^* L7 {5 F5 Qif not
' {1 _' t4 I* q& w3 I$ O5 Z$ m, b* a6 r5 C% \/ X& p6 R0 g
Weight the 2 time / r* f- E' i+ t# Z- T
! u2 O+ [+ B$ m8 A- }5 ]
Suppose 1-6> 7-12
: R. C; b% m2 m* A& I- Y/ Q: V8 i, f3 z. a7 n2 Q% Q& b9 l
1-3 vs 4-6
3 Q& v3 `5 ^) P% ]7 n, _% `8 d' c. B% S8 |* d- s
Then Weight the Third
, g3 D0 t5 M# e2 b- Z5 M3." t" x9 M% M+ U, h$ Z8 Y' c2 e

* W. `4 P" x1 X/ Y# B" U5 C2 PSuppose 4-6 > 1-3
) G5 s& O5 }4 O' V- F& z/ c5 F- \. C7 @
Just like the first Step
* _0 Z3 a6 U9 \' [7 [2 J- q& T# k; B9 }
4 vs 5
3 S4 P2 {/ l- F
# j8 K3 K6 d+ u+ @if 4=5 6 is the fake one
" Y. u2 q' V) u* I" j" [+ a" C* @' t" M- ^0 ]
if 4>5  4 is the fake one . e0 w) V3 S* {6 E* W( B/ u" H
and so on......................

. z1 ]6 B, L& ?. A' L

( g5 [6 `% l7 f+ T# [) q0 k6 t, d2 r
問題第二步0 j0 U3 z) t/ B& R9 [

5 Y) w+ J( L, l, dWeight 1:  1-6> 7-12" L7 J' x$ h6 T+ {# l  [8 U% z
1 G; I3 A. A  ^
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6& B# b8 `: h$ Y* s' r; G
8 t( e% ~- u; h9 |+ S- G+ W
你第三步点去搵 7-12 边一粒???, x9 E8 b- `  E! X. m( f
9 {  A$ d# e. k% k% E8 v0 C
========================================: d; I+ ^1 r, N

% n( v/ {0 e$ Y問題第三步. F2 G+ s! \0 {

' ^- U. [4 B8 z0 i3 }* AWeight 1:  1-6> 7-12
5 B5 u2 ?( Z3 u% z- w7 Z
% v+ l) E3 A+ S2 _  a8 X3 MWeight 2:  4-6 > 1-3 ; |# D$ w* z9 l1 d2 B: _* `2 j
5 z6 p8 H1 l( z
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