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0 H$ x) ~8 e2 ?7 _( y: T% |: q
; ~' z. m0 k; k5 [, ]
『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)。1 u/ w2 n' S! }& x* w! L
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 q! I7 R' v$ Q5 J) U# x: u; X
( [) n8 N8 \  s7 W
注意:
# K" S) J2 \# j$ s6 M8 ^1 f0 g, N* P" s/ v) k+ y
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9 p! d" ?# V. @5 A+ a* M9 }9 L
8 M5 c$ B. O2 ]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  , hide 字要連埋 , 內容 = 答案
2 `! d! o8 ~/ }* O. w" Z7 K$ G/ A, |+ p3 j+ O( F. D5 n
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
& N( E( c  C9 O) L! T( `相信e條題目都有吾少人玩...

/ Z( c8 G" ~  o
我以前畫左個chart去答,
) ^% |; y2 e6 e  d9 x8 [+ p等我搵下仲在吾在) w" P& n" _$ }+ N' N, z$ s: u

  n4 ^8 d5 B# y4 W) b2 b當日用左37分鐘答１２粒波子，差７分鐘才合格。
( X% C7 P! B1 H8 e# J# b" }* _$ N13.........
' G8 v; j& a# X& G. ?' \& S7 S9 E  p; ]/ T, M0 ~
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:5 O9 A- v, U4 K1 `, v

9 K& I8 b1 L% b; A9 ~我以前畫左個chart去答,
. u) R6 l1 c) ]1 s  o5 d等我搵下...

; R& d% M2 J$ o) y( b8 Z; ?# d0 q9 R. `- m  B
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:
8 c6 v+ i/ X( w% r唔識隱藏...已經諗到..

) i* A, J2 V( K1 @0 W/ \

0 \: ^6 {, ]9 ysor !!!....e加改左
* e  R  m7 ^4 u( N9 a
5 i. S. c0 d/ m; k1 Q2. 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
& m8 C) P* E  ]5 \) U) M7 v& [7 G$ b( j+ n+ W2 p
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
2 Z9 t/ l0 ?% Y! ~相信e條題目都有吾少人玩...

( c/ M- U* d+ w6 X* n& O! r9 r6 U
4 a" g0 v! f4 q- c& t
PlayPlay, Let me know later who has the right answer and I will add points accordingly.5 T/ d4 m  [7 R9 Q$ u9 |/ d# \. P

1 |: h1 T; S6 Z" G7 CThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
6 l9 I3 U+ x5 o, h2 J! L( p' {) R* D, [0 A  i

1 v# u! Z( Q* R5 |; s# U9 vPlayPlay, Let me know later who has the right answer and I will add points accordingly.& U+ Z7 |; ?# ^* F0 Z0 s9 W
& L) \# E& ]1 `  F/ Y2 o5 \. J
Thanks

+ S3 D$ J; {, ]
. E: n1 f+ ]- c0 B1 O6 F1 J
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.  [! D" h$ ^0 Q& B3 i9 o! q
1-6 vs 7-12% w7 s9 \) l7 ]6 ^7 F
if 1-6 = 7-12     13 is fake% U; E; \  l& ?' u2 c& w! U  F3 W
$ U+ P( K3 f0 E. a% j
if not 3 z5 c" m4 u8 _  k4 F' _1 i
; B+ e3 [+ e4 r3 y5 e
Weight the 2 time
2 k0 ^# @$ \. X/ x " T3 Q' @  y4 B+ f' D+ b6 X
Suppose 1-6> 7-12) y# M7 o$ n/ J$ ?/ ~  b
% ^! y( ?# S$ `5 z
1-3 vs 4-6 3 t3 \8 f9 \0 B
" }+ L: P% U. ]) k( H5 t: A
Then Weight the Third8 l$ }+ ^  \& O6 `+ k8 p2 h
3.
' a1 S% ~  m" c4 o0 t! b% t3 S1 m* d
Suppose 4-6 > 1-3
5 q$ `2 o/ D5 `
4 z  D9 t( d3 @5 DJust like the first Step- l( g- J9 I6 X9 G' h! d* Q  H

: V, H8 R! h) R" N$ D4 vs 5 0 L! r2 m& u2 G$ X$ U6 w
5 x/ F! q9 N" @+ `4 Z& ?# y
if 4=5 6 is the fake one % F9 x& D) j) L! U0 w

* y  L& v" l2 h! p  v/ Zif 4>5  4 is the fake one
- n( a0 r9 l( O( [( k" `2 n1 y5 f- W3 Z$ L4 i
and so on......................

hello1997

分3組4隻波子秤7 k+ ^: P8 |6 X( J' r+ ^

- w, ]0 d4 A+ P0 i7 BGroup A: 1,2,3,4% N7 K  w5 {" ?1 [. |+ l# n
Group B: 5,6,7,8) @! q2 F- _# u
Group C: 9,10,11,12% |+ x* J; @. i0 |
Group D: 138 S) T! K0 ~; a( \  h

+ f, L' K; w$ r5 q& X5 fRound 14 C) w3 _' O7 ]# D3 c; O1 c( p
Group A vs Group B
0 o, i  k2 y" ]9 c- w如A and B一樣, 即較輕一粒在Group C or D
4 ?. [" `' g" `, i5 I" P; b, `5 n& V$ b1 y* f2 Y  u9 ]! }
Round 2( f7 ~$ W5 A* _& Z! n: ^1 Q
再在Group C拆成:
- z! Z1 Y3 q" K/ M: i- NGroup Ca: 9,10
4 o+ I: }  j9 l; U2 r, ^8 LGroup Cb: 11,12
3 N2 e  ?1 |0 n+ {然後再秤, 如一樣, 即13為較輕一粒.) A2 d+ X; c: F; c2 K' q
3 [* L' u1 a1 R+ G" y" u5 F+ ^+ p
如不同, 即較輕一組有一粒較輕波子在其中, 1 R/ Q* q' v2 d1 E8 \
要再秤, Round 3, 之後便知答案.! X% y9 j* x8 @! R- y0 s
% d$ G$ `/ |1 W$ k5 E! W
e.g. #1 假設10為較輕的一粒
" |; ?# \( G: {: XRound 1
9 N* S1 p. h0 E- q1,2,3,4 vs 5,6,7,8 = equal) l! O/ o$ M- i6 |0 d

4 F4 u) i3 `8 X7 oRound 2
; c, J3 L* U8 a& h4 q9,10 vs 11,12 = 9,10 < 11,127 p( T3 l" T  T2 I
; Y2 B9 g2 o/ j6 Q
Round 3
! \) \1 L0 I/ _6 e9 vs 10 = 9 > 10
( F/ ^5 R3 c) t4 Q: R5 n8 t+ ]
) b- T$ V  u! d, QThe answer is 10.9 E$ }. a2 y- n: m- s
7 s2 i: C  o4 P$ y! B
e.g. #2 假設7為較輕的一粒
5 F/ W% L$ K" ]; T" o! NRound 15 b+ Z( l% l$ D" C% j
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
" v3 ?1 B: r# }+ U" j
$ S0 B, K: Z( {, I9 H  p# fRound 27 f3 `6 H( ]4 I( U9 ]+ H
5,6 vs 7,8 = 5,6 > 7,8
2 T0 x" R3 [  ]7 w4 ?  H# M& u! j% w$ b
Round 3, \. {6 u9 L) @' q/ b2 L
7 vs 8 = 7 < 8$ M7 B( c7 g) Q& x  h
5 G" P& n, K# V/ t6 C( u
The answer is 7.0 V5 r6 B" ]7 V; f8 H  o
  o; Z6 L# n, |) N- j( o0 t
e.g. #3 假設13為較輕的一粒
; r+ ^* k' J0 eRound 17 [* u( g+ Q( l, v
1,2,3,4 vs 5,6,7,8 = equal
" n4 y$ i$ G2 ]( e/ |4 w) S
! ~/ \7 p9 Z3 x, SRound 2; x. L# S6 N8 N: q
9,10 vs 11,12 = equal( T* c" n* n7 L1 X  V4 Y
& A; j3 m& }. d3 i9 R
No Round 31 U( m+ C) X* C  C. e

" Y* {0 A9 ~! G  e  p  r8 wThe answer is 13.( F: Y6 I2 T  N; n

; ^: _6 g; |# s; J唔知我答得正唔正確呢?!
$ y8 M# S; F- d" n% i! X% }7 B1 }4 ]' \! D8 a# Y+ s
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
, @8 p/ U3 e/ i. N# Z9 W" X1.
- d6 d; f& u- ]: h! |' o; |0 s) `1-6 vs 7-12
" p( n2 T7 y3 t1 G# w, Wif 1-6 = 7-12     13 is fake
/ \  @5 C6 C/ ]. b! M  }) S) |- k, f7 Y) Z& F# ~
if not
" S+ D! k, U. E) ?4 y' s0 O
) p% r6 N- I& q  B' |$ b, Z) Y) oWeight the 2 time . P2 a6 R: U' {' {4 H' A) D: m
2 T6 ^: C5 w2 q- ?; I; ?
Suppose 1-6> 7-12
' q/ E7 ^3 w2 l, J7 F/ \, u' d, g% f: _2 i9 m, ?
1-3 vs 4-6 / c& h6 E) v$ \$ M
0 `$ l* @4 @: N( V* F' @8 \9 g  I
Then Weight the Third6 i6 `/ Q; m' b  S5 J  ^
3.
. X' k0 z7 f$ p6 `( T; y! e8 T! c) O7 j% C
Suppose 4-6 > 1-3
9 L6 Z, ^& _: C6 X, w# R# _
- K8 ]& v, C3 G( ^' EJust like the first Step" H# ^" M' c" g& i2 u

3 }8 h+ V/ `  z  g4 vs 5
& R$ i# s$ c- a# c# D
' b% J# Q+ b8 N3 P1 xif 4=5 6 is the fake one ' b' S+ V& R5 R9 K/ {: n2 Y. ]% B: L: |+ [8 t

$ K, [8 _8 c7 v: E0 E; N7 Lif 4>5  4 is the fake one $ e% D; k7 x" ~6 ]( @! m* a
and so on......................

4 d- u6 E, _1 @+ B7 I8 {# X( i6 p' J8 W$ u
% y  i6 I2 q$ j4 P. |/ O( r; O% M
問題第二步
# Q* A$ k$ ?; W$ A; \/ y1 A& N5 u9 z6 t# ^/ @- s% E
Weight 1:  1-6> 7-12; B: V4 {+ ]; {5 f1 Z7 M

' t' V& `: @" b6 l) `1 nWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6& P8 H+ F2 L9 r! `* Y/ k

: o/ Z) p9 h9 k1 V你第三步点去搵 7-12 边一粒???/ t4 [2 t  W" M- t
: x+ i, G8 [  l+ M( g8 K$ b
========================================( }  r' F: d3 y

. P8 O% Q1 |5 Z- ]; g, z問題第三步! t0 [8 q1 ]4 C( ~4 f

. }8 R& ^7 G8 w# h" H) A5 d6 Z' ?* xWeight 1:  1-6> 7-12" f2 h% ]( a& \6 G6 J) C  J, }

7 D3 u" T8 N: R5 L4 ^( xWeight 2:  4-6 > 1-3 & e- ?% @; n! a# R' q
, p  x  n5 F: Z  j# H. M8 s
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