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
1 ^5 u$ N# i  O& s- {# S- s
7 F' L' d3 s% N. w7 R1 h『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)。, m6 c: b4 ], x; e: ~
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？』8 x8 E0 X5 \6 `4 U
( f1 E- b. [& Y5 G6 U
注意:
$ s2 D3 n. U' Q. a: V3 G' Z8 l/ m3 s
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
: F5 C+ Z! j' W7 d! {. R( q- d
1 D: M* _6 j1 K. `8 Y9 S2. 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' p% i& m2 L$ W' t; Z+ j

3 I7 \  g# n& U& L" {1 }& k[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:1 s' C, T* V) B6 U% {5 z" D8 v9 a
相信e條題目都有吾少人玩...

0 c8 t1 t9 A. l( l" y我以前畫左個chart去答,
; L4 ~0 v# t  R等我搵下仲在吾在
) }7 s% `! d; f9 x: V# K& R/ \: }6 f( ?: e
當日用左37分鐘答１２粒波子，差７分鐘才合格。
& m* X8 B7 j  z* p6 a13.........7 u* X1 |, b4 \7 y  D

- t8 v! s" \. z- K& g  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:( G% k: o0 J* e" H
$ ]5 f, b+ b3 n
我以前畫左個chart去答,! Y( y3 |8 ]8 _, r5 z( J0 q8 b
等我搵下...

3 T1 c- v9 [) K
& U, h. d: E+ \0 B1 X/ e
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:
3 E3 F+ d* ~& a7 h  n8 m% v唔識隱藏...已經諗到..

; B1 h  |. S1 J, b& ~/ w
: G1 {: R# r. d3 F4 A2 F3 Y) r
sor !!!....e加改左
0 j2 d$ K  s1 Y5 d2 y, ^  r3 c- m1 |
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7 [( F, v0 E  d/ Z  n) I6 e
( r# i6 O6 n) p$ {5 C! i# B
[ 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 p, E) I+ J" t# p% {
相信e條題目都有吾少人玩...

* i6 i( c9 @  z" o4 i
# n- ^+ @( h+ m; O
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
- [- m; R: L9 [' q
( @/ c6 D/ c, U; F1 a# a& WThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:7 Q* A3 t& d2 V6 N/ f9 D

$ B* H7 a3 @5 G  f1 S; I8 U: c2 e4 Z3 o7 f# t
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
: F0 `0 h2 y4 g. j- D
- n; ]6 O4 A" a( W3 q4 _Thanks

6 u- o1 J) {1 q0 V6 I+ i1 h% `- q8 f6 t( {+ {
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
) Q6 ^* m4 [5 f9 Q6 F" j) ?* j" g! ^1-6 vs 7-12  C. I+ i! n% i6 g7 l3 \
if 1-6 = 7-12     13 is fake7 o5 P  o. j) h! _  R/ F
+ L  n2 \4 o6 H4 h7 T; C+ e
if not   C% ~3 Z2 B0 f4 j
' h5 u$ u$ x; |4 b/ m
Weight the 2 time 3 `/ A0 K- i1 o2 b  E2 M

. s0 a4 o' W* S8 w7 nSuppose 1-6> 7-12
, U9 o5 T2 r3 A4 i  i; \# O& l9 i6 |
1-3 vs 4-6
# U- w/ @: m) \- T0 i. P6 f' |5 G% o  E5 ^; g
Then Weight the Third( r" k- S0 `$ {, @- K
3.
: k& F9 U0 n. M! K. q" U+ }: j' G( \2 `& _9 o
Suppose 4-6 > 1-3
+ E& \' g# Q  r/ ?. w' b( G5 R0 k+ Z* A
Just like the first Step0 m8 m% s7 ]. z- h! \
% P; l- K7 v2 x( ]; p
4 vs 5 $ R% o8 l# m* X, f( D

+ v7 P% R7 m6 u- n# J2 r: Tif 4=5 6 is the fake one
" j5 f  R3 y: S' N0 L
* L* M: l; e  A/ f) o$ ~6 T  `if 4>5  4 is the fake one 4 P6 {8 I' C( T

* {9 U: o" j  T! D0 Xand so on......................

hello1997

分3組4隻波子秤+ u7 Y  N( @) |, M) o, u! R

' t" i+ y3 F7 C( s6 N% A* cGroup A: 1,2,3,4( K' o% t2 G' x8 a5 A
Group B: 5,6,7,86 x5 {' |5 M6 ?9 D
Group C: 9,10,11,12
$ {) e8 t6 E  |: _9 E# e( pGroup D: 130 ], T9 S, x9 X' i+ S9 z
6 x' E0 ~; V. E4 L3 T0 W6 K: l' P
Round 14 q+ U/ i! C; [9 U7 H' a9 a* P' s
Group A vs Group B
5 n* a0 j/ B" N7 h# }如A and B一樣, 即較輕一粒在Group C or D
- P! {0 l8 D+ B: m1 M
, R( q+ A& h7 hRound 23 R3 k8 ^  E8 D2 u6 _
再在Group C拆成:
1 ?3 i- I2 O( N5 }' `' {( g* M, Q: qGroup Ca: 9,10
  S0 W4 Q( Q0 t$ r- h" U5 t; W) kGroup Cb: 11,12! G  Z# C: j5 [$ Q1 A9 G& ]
然後再秤, 如一樣, 即13為較輕一粒.
. L# G3 |4 \' a  l
/ d6 g# d$ h# ~. ]9 ]; S如不同, 即較輕一組有一粒較輕波子在其中,
  T1 W+ v: C; `; R要再秤, Round 3, 之後便知答案.
$ o& y1 L* O/ ?  E4 P; v" [7 Q
- d/ u; K& t) H+ `5 q4 T, A+ de.g. #1 假設10為較輕的一粒
/ {! I+ Q! b8 I9 X/ x" p' V+ s3 u5 L# xRound 12 V% I, \. w9 w' f, \2 t' |
1,2,3,4 vs 5,6,7,8 = equal$ P9 M) Q& R. n) E" u3 N

" h4 p" X5 I4 L$ o* T' aRound 2
* S( C% E+ b7 ~- J0 o1 Z( r% `" `9,10 vs 11,12 = 9,10 < 11,125 ?" \0 c% y7 i! z9 ]0 p/ H1 T

: `6 H2 Z4 x9 X, K+ x- LRound 3
' a) q4 h0 w# w1 r1 t9 vs 10 = 9 > 109 |, v( C; U: L" O
: H% B5 }. g4 p& I6 c0 U5 s
The answer is 10., i0 C7 q) c2 I. z
: e5 ~6 |2 Q" z6 `+ {- T
e.g. #2 假設7為較輕的一粒
0 m0 C5 [- f) [- t! nRound 1
7 e& j* S3 f7 i8 x! K$ A# Z1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
. t, w7 Z9 {4 D2 z! E+ P
; a# L: y/ K+ v( X' E: U$ yRound 2
1 p2 Z& M* z0 t5 q7 v5,6 vs 7,8 = 5,6 > 7,8) ~1 h; N, d: j: R+ Q/ I: j8 |
8 W2 b1 N1 p% Z% ^6 Q& F  j% [3 @' W
Round 3
" ?: C/ J. l$ F. @& T7 vs 8 = 7 < 8" z6 q% V& [1 `
; ]+ T  {: a9 q- |
The answer is 7.9 ?  ^! X+ q/ X: [: k" X  J

5 Q7 W: P% N/ B8 R6 T/ I# u* O) Se.g. #3 假設13為較輕的一粒
1 _: E6 c$ P, \/ KRound 1
8 x. }1 I1 \# I! \0 j& v2 ~1,2,3,4 vs 5,6,7,8 = equal9 f' H: p( u1 j8 o, _

. y6 }# h( K! s7 V& e/ v2 p8 q7 GRound 2+ \& ], G; x8 s; i
9,10 vs 11,12 = equal& o8 H' N$ e  m: q) }" K% ?; `
/ p- w9 h' n2 D8 [! m; B5 h
No Round 3; C/ R: V& _! P$ |
* d  D( {* i3 _( f( e
The answer is 13.
- A7 f6 ?5 G8 ]# o4 I# V& D9 X+ W
4 K# O' D2 Z3 f/ M4 c, i9 z唔知我答得正唔正確呢?!
& W2 C) x- _: P# R* _, `- U6 U- d8 z! B! v: @5 {8 U$ t! [8 _
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
4 U& d+ c  j8 L  U1 n7 ]7 B' v1., J2 [* s5 F' C
1-6 vs 7-12/ ^; O* D0 E! L! {0 C2 a3 A* x
if 1-6 = 7-12     13 is fake8 o$ N/ m" ?( F0 K3 Z  [" [
( t% ^; M4 W* o) _3 L. p% |6 j" q0 W1 U
if not ; x+ J! I% C2 d3 z; d

: y3 K2 m8 o0 SWeight the 2 time
0 L( M7 S5 y% b& |* X
# U3 D! l# A$ @) MSuppose 1-6> 7-127 K# E! U2 z* ^1 @9 }+ G

5 o# b  V) X5 K/ }; Y9 M1-3 vs 4-6
) l2 v) j' @. T2 Y- Q) z
) Q. q' O; y& g* U. D  r  BThen Weight the Third
% ^$ Q, L; P8 m& Z3 d. |/ R3.# C, f3 o* `$ S( }5 r: ?

. ]2 b/ [2 a% [' k; \Suppose 4-6 > 1-3
: H) Q3 l8 [' k. c* w$ L5 A& J+ l) m+ o+ x
Just like the first Step, M( I) v/ |, F) }0 \! ^5 W
/ H6 E7 J' m* i" x/ g2 t6 x, D; T
4 vs 5 8 {6 B! W9 F+ R8 r, |/ i1 U

' z3 g( ^* Q/ W: k* T+ \' Q( Jif 4=5 6 is the fake one
& ~$ Q0 a+ P) G8 Y3 ~/ H  f' p) C) M# N: y3 I
if 4>5  4 is the fake one ' z4 E, _& f# g
and so on......................

7 U2 P2 ]( X- \) D5 n1 k
) C1 [$ j4 _$ d1 A9 [
# w# ^+ X1 ?! B$ y
問題第二步2 |& J- a+ `$ T; b
4 S9 ~  u3 }$ f9 N
Weight 1:  1-6> 7-12
: y: \) ^: r5 F. p  {% L+ L+ _1 o; ]' w" B) `
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-63 h6 G  {+ ?& B3 i) e' y

+ V' m/ c, r! n% D. R) Q你第三步点去搵 7-12 边一粒???0 Q* N: W; C5 E) x8 S6 n
/ H. H" S" i+ ?
========================================9 N. a+ j- D0 N( a1 x
5 a) I+ U, x( x0 B( O! r
問題第三步
, p. _+ `; Y& m. @4 T5 U7 E+ m$ h! i2 s, ]/ u+ |
Weight 1:  1-6> 7-12
6 @  E; Q- e7 e+ o
. B! ~4 z+ l3 @0 }" R2 [# c- ZWeight 2:  4-6 > 1-3 6 V( J6 J. e! z$ r: E/ g
1 R% @) d' M$ W8 `- ^
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