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
, x4 b7 _1 A! x) ?7 y* k
6 w  M. e! ]- _* x+ B/ _0 g5 P『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)。& K( y4 w4 M1 ~4 a$ o
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？』
3 T! N9 W! A5 D
5 G8 O( u1 U, {9 \9 k" g; A注意:
$ i. P9 I2 o3 l9 b+ i9 ?
6 w9 Q& `- e2 E! _- Y8 y3 c* R; M1. 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+ D6 s6 W9 y+ b5 r6 `

9 S4 t4 J9 a) d2. 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
# |) q* y5 y. M6 ]' C5 Q
6 ?$ n. I) J' f+ j; _. \+ S! |[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
! V( P' S  C. l1 A2 T. g$ a  m" }4 Y' o相信e條題目都有吾少人玩...

% f. @$ Y# z0 L, u, g% F
我以前畫左個chart去答,% C# d% k/ A# w
等我搵下仲在吾在3 J( w0 d+ I# N, k3 L9 e" t

+ q, \& }* p( N4 |% h當日用左37分鐘答１２粒波子，差７分鐘才合格。
/ N4 m7 O. G- E2 {5 A$ k13.........
; v! c, X0 B' ]- s1 ~- }
0 O3 ~/ @2 \0 B6 W4 H! @0 w8 F[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
% R/ b5 b4 I0 K5 `* W7 O; Z. z' I+ C6 O
我以前畫左個chart去答,5 k2 @/ z/ _  Y) P% b% r3 j: X
等我搵下...

; C, p( `, f5 |9 ?3 |1 ~" I. L) G
/ x2 v$ o/ ], @
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; s: {/ |% P. F# ?* i
唔識隱藏...已經諗到..

' o- I6 Q$ Z' Q; |% {( l& x( @
+ {# `6 k, h$ }$ F. M/ ksor !!!....e加改左
6 s$ `$ ]; T+ F! M# D6 P
' M3 W$ E. a; a$ d5 r2. 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
- F% D# W) B, \0 O2 U$ s8 ^
7 W9 J5 [# Z- S: b4 X9 b% h' k[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
# W. c6 N7 _0 X; @: W: Q相信e條題目都有吾少人玩...

- c0 f2 f8 K( p2 Q. O& F: N$ L9 Q% S/ D  A
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
$ b6 O% y' x! m  ~9 R. W7 z  t/ d) L: g1 m, ^9 r
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
) C" o2 A- A' r# Q# l- A4 _" w9 w& t# m* {+ \
3 L% d4 r0 F6 F9 h
PlayPlay, Let me know later who has the right answer and I will add points accordingly./ G( H' ^- j. ~

% _% a4 k, x  `0 S# {# D0 ]Thanks

& O: ~8 X2 Q2 m8 G6 D! s  ~
( u! l3 L$ z  B" Y7 Q. q: f
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
4 n, ]; u2 \( Y" A# Q; \$ D% G$ K1-6 vs 7-12
2 d! X* e) s' oif 1-6 = 7-12     13 is fake
  b( q4 w% o5 l* @3 \6 _0 z" H( M5 J7 N0 a9 X
if not * L; [1 l, W9 o& i
( Z- m  A# R$ [* M/ J; r7 R; w6 a
Weight the 2 time 9 @3 t: x4 a2 ^

% H) }1 z0 g( w) u* N7 mSuppose 1-6> 7-12
0 M. A* R4 G% I9 u3 [
3 Z$ B( o: r$ Z( s; g1-3 vs 4-6 - n! L& K/ [7 K+ L1 C

8 Z7 o" |$ @% v2 a* f/ r- `Then Weight the Third
3 W; |. l( `1 |; U3.  T0 N2 u# Z3 w7 V* B0 R

$ X( X2 c# A9 z) XSuppose 4-6 > 1-3
& b( |. q* Y9 D: @  y  h
4 U0 P) z% Y, W+ _! I1 Z* IJust like the first Step  d- u1 Q/ m9 K, p. r7 _0 p& w' U
4 J# p4 `5 \! N4 `+ Z
4 vs 5
( s5 X( l% _% [' Q$ z+ Y0 Z' n8 R/ e9 Y2 r6 O  V+ u3 l$ Z/ t; [; C  C
if 4=5 6 is the fake one
' M5 d9 {& g: s; v$ \- d: D( c! n+ C8 D% @
if 4>5  4 is the fake one
+ V) @7 t7 J- M- x1 P. X
0 d5 D0 e; O# m! l/ B; e' i  S4 A3 land so on......................

hello1997

分3組4隻波子秤
* F- ^/ q9 F6 z  i" H& y7 g0 N; l- T9 o: A* X: F
Group A: 1,2,3,4
% K6 ]7 v# j' G0 p* sGroup B: 5,6,7,8
% q0 R6 W# E$ Q: I& S; JGroup C: 9,10,11,12
* b+ V9 [5 T3 X, Z3 dGroup D: 13
# P/ s" a( X) b
: m. D, P; ]  }9 K, fRound 1
* x& E* [$ S0 x+ _) o+ {Group A vs Group B
9 Q, L2 H# @. ]& B8 R9 v如A and B一樣, 即較輕一粒在Group C or D0 S& V7 S6 p' [7 m
" O- T9 }4 Z3 D" Y  T7 R, A
Round 28 g7 C, }$ ?& h( v) z" o
再在Group C拆成:
! u" W2 |. j" C+ VGroup Ca: 9,10/ e* i  M, r' s, V
Group Cb: 11,12
6 W! Z) h( l3 S4 x7 ~! `然後再秤, 如一樣, 即13為較輕一粒.
/ N  {! x" Q% ?5 K( E9 e  F1 j& d$ t9 @' Z  J" |9 D2 R, _
如不同, 即較輕一組有一粒較輕波子在其中, 6 _3 e! m8 Y$ T' d8 H' d
要再秤, Round 3, 之後便知答案.
; H9 A" R5 O0 k5 J) g2 R! C
5 l0 h3 i9 f9 ~2 z1 Oe.g. #1 假設10為較輕的一粒
. J) X/ D2 l& `1 f; I2 @3 m! r7 KRound 19 w* T" R  y" v# q3 ]& J
1,2,3,4 vs 5,6,7,8 = equal0 Y; H7 V* I% Q% J
; O5 }" F7 e! t6 F  Q! D. a
Round 27 M% B# S0 }7 V5 P* }4 I
9,10 vs 11,12 = 9,10 < 11,12$ A' G9 o8 I7 P% N

" f$ O/ a: \7 G. L9 [6 W8 nRound 3! o( J" l; m( \' H* Q% W+ H
9 vs 10 = 9 > 10) }+ a" S: n/ C) p2 r, ?2 }

5 ]' I3 q6 D7 VThe answer is 10.' p' K8 I: I/ D4 P9 x% j

, f4 z3 S2 R. o. k; i/ p( ne.g. #2 假設7為較輕的一粒
& ^, |2 \9 N9 w" c# wRound 1* m& q! V" Y7 R# C% H7 Z+ E
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 [" T- q' o( g, `' d
1 M/ H- \% N: X
Round 2
5 ]  T* c3 W, M4 O5,6 vs 7,8 = 5,6 > 7,8
% f6 ^8 m; M* Z# `; ]
/ h+ e6 B6 W* P2 l. T7 L" mRound 3
/ U5 S  H. o) l; O2 V9 C4 U7 vs 8 = 7 < 8" j4 b! V5 i  r0 X1 m3 z% C$ v

; u8 v- @: q( \& ZThe answer is 7.3 T1 k4 Q6 Y3 f! d

" c% e' @. H: E+ ]e.g. #3 假設13為較輕的一粒: I) f% u; G, U9 g4 K, P
Round 14 B# X3 e2 R" l
1,2,3,4 vs 5,6,7,8 = equal; r+ @, U. j9 M, b" E4 y4 |: e

# T( v& T( `+ ]  M0 a) m3 L" HRound 2
8 O/ }9 X* Z; V2 T9,10 vs 11,12 = equal
2 D" A& T& @( ]
$ L, I% O( }! R7 lNo Round 3
' N# O& Y5 m: B6 R5 j  t- R5 g" O& D9 Z, A/ d
The answer is 13.
8 {& F0 ?- l( ~9 J9 y5 r5 c& u: t" T, |3 ^* L
唔知我答得正唔正確呢?! . Y4 h4 Z  p7 `% @7 q. q3 M4 ]+ q0 t
/ L% H! w5 R" Q8 v) ]/ w
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:0 `3 y. w4 }+ T
1.
& ^" j/ [% w; H6 W0 @; u1-6 vs 7-120 u4 A3 T& x) H" n- R- X
if 1-6 = 7-12     13 is fake. t1 \+ i- e) X

7 k* W" ^; j$ q; x% Dif not
/ h( w: F9 G/ r: y7 a% A7 z) S" J5 c* V1 D
Weight the 2 time 3 n7 u$ T" {4 W) k. p6 y
; e% J( n$ {6 U; L3 a8 a+ R
Suppose 1-6> 7-12
1 O# |& ^0 R! r; Q6 C. V9 \; ?6 [0 t* X7 i- W  X$ p( A
1-3 vs 4-6 & s7 I! y/ j& f  K) G
' I; o$ l! j: U  x  d* U4 h
Then Weight the Third
5 _% F! C' K8 r! K* l2 i3./ Q+ ~- D- N+ v; T8 T+ b

# u* a* J3 t3 e# x4 a, eSuppose 4-6 > 1-34 z2 f) S, t* H6 O: ]* B: Q

6 y0 D% s3 s6 UJust like the first Step
/ R1 N+ _0 k1 p& w+ ?1 Y" t' ^
' o4 F9 q  L. p1 p: j; M9 E4 vs 5
2 ^6 r, j7 N7 z, ~9 s2 h% p7 x
6 {2 I9 a1 Y0 v/ hif 4=5 6 is the fake one $ J/ t& V7 r& |, \- R3 x2 u

" W' \: S1 q& A% b& Qif 4>5  4 is the fake one % W4 Z! K# r: T4 ^$ D9 k
and so on......................

# R8 l# V  |2 A" s' x' Z  I' Z. h4 R5 w* [& k8 `& H
/ e2 m; Q1 D, C
問題第二步
6 K: u; Z; F( j. P8 i: i% Y! F( X3 q+ l$ n; p6 ^8 C1 d- ~" \8 V( ]
Weight 1:  1-6> 7-12. h& z* M6 F' A) F3 U: B2 I4 ]& r
- |/ y' e* O0 k5 \9 R3 e7 Y- R; }6 N; r1 K$ O
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-69 {3 f# @% u7 j: d

% N) ]0 R1 Z3 v) @" o你第三步点去搵 7-12 边一粒???8 ~- c- k( V+ }6 v) q2 v0 G

* G& {; y# L2 r3 g& Q- e2 @========================================
8 x* v* \& v- v! B& C
- D- o+ V0 F3 E8 G) `8 N問題第三步: Q7 S6 {6 D: b3 B6 `8 |

) ~& _4 Z0 T8 ^/ PWeight 1:  1-6> 7-12
9 @7 J9 [4 i* ]' F/ g: V8 }7 {% O7 W' t6 X
Weight 2:  4-6 > 1-3   d7 I7 T! r% G7 n+ J  U

+ n0 J* b! B! }" ]' V, ]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