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7 X& t; D7 o7 O0 L6 n, X3 E
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『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)。
5 s, I1 H* Y5 Q, G4 B% N$ i3 m- [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 ]( W6 f) i. [

$ b7 |2 r  H" @  `: `) ?, a注意:
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! n' y9 ]  i  P$ X- |% d% l1. 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2 }; n+ U3 k) a3 K# `$ r

# b: |3 K( L; K2. 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
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
/ K0 p% b* i6 N: h相信e條題目都有吾少人玩...

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我以前畫左個chart去答,5 H6 q/ w. z6 L; K5 T
等我搵下仲在吾在) t6 b9 c: g: N8 @$ v

; H- ]1 O! @7 k) j# w6 e# L當日用左37分鐘答１２粒波子，差７分鐘才合格。9 _4 N$ ?4 Y$ ^
13.........2 M" l; ?+ v  h4 [+ b) ^( Q

- H+ ~9 ^1 M6 |3 @! V4 P+ T, o( {[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:1 q9 n! ^% T! l) e- ?" H

$ f2 y( @  m4 }我以前畫左個chart去答,6 {7 Y3 k* K# D
等我搵下...

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* K/ b1 U) [; S: o1 j2 Y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:
9 [6 I8 }4 |3 W1 }唔識隱藏...已經諗到..

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sor !!!....e加改左! R& _% ~8 \3 ~0 ]" w
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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, k& A8 ?2 }7 W1 o  P
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
3 I# K( _$ n' d3 N相信e條題目都有吾少人玩...

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1 `9 g3 \" K3 r4 NPlayPlay, Let me know later who has the right answer and I will add points accordingly.  h5 P: D. `1 l: ?2 t! ]
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.2 @+ ]/ n+ K1 u  I" v, _' J

  ^/ J0 I- f" _/ R: ?3 k! dThanks

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; n# M# Q$ ?: y, t; ^- z不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
! B$ {' j/ M3 Z) tif 1-6 = 7-12     13 is fake
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Weight the 2 time
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1 p. M6 R2 A+ j& T* eSuppose 1-6> 7-12
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5 {0 L0 d+ Y$ _1-3 vs 4-6 , _4 R1 S  J  h5 X' g4 ?4 r
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Then Weight the Third0 R2 U9 M1 o6 k; E
3.: @; D' l0 Y8 P6 X
# u8 l& U% F$ ~! N9 ?/ x7 o
Suppose 4-6 > 1-34 W' t& }$ I/ W$ K5 L

2 u( S3 l, }# i4 H  x: H1 \Just like the first Step2 ~) N1 w  i. A" u' L

5 y4 @. F0 v4 J6 u& e% H: `' N4 vs 5 & e+ Y7 j2 ~9 r

% T- B! ^2 M0 _0 ^& L  C. Z1 I5 Wif 4=5 6 is the fake one 0 [1 |4 p+ u  h
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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) I# M& |7 D5 V% W% r5 RGroup A: 1,2,3,4
. ?6 D  ^) M2 ^0 _Group B: 5,6,7,8
3 E) k+ }% L  X' i0 I% s" S/ @+ A7 UGroup C: 9,10,11,12
( c* s2 @) @+ X3 j, lGroup D: 13$ ]; _1 t- Z( a" T

0 H; j2 \  o5 G2 l. |  [; CRound 1
8 {; h8 `1 F% z0 `! g2 pGroup A vs Group B+ }- F, e: I/ L# @8 H. ?
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
" U$ }; g+ k' x  H' ^) ^再在Group C拆成:  }; Z7 H6 }3 |9 N% i' C
Group Ca: 9,10
% P4 T1 ]5 W, l. S$ yGroup Cb: 11,12! w% i0 R& Q+ d7 x3 s3 E0 O
然後再秤, 如一樣, 即13為較輕一粒.& n: _! N2 h- ]1 B
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如不同, 即較輕一組有一粒較輕波子在其中, ( h$ @; s# }" ~) e
要再秤, Round 3, 之後便知答案.
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; Q4 o* }2 \5 a2 v* t, te.g. #1 假設10為較輕的一粒0 D" d& p6 a- M- y  _. U
Round 19 @" Y) _$ R( O; E- y, c
1,2,3,4 vs 5,6,7,8 = equal
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. \4 K" q( X" l9 H2 x' ?( I' ?Round 2
9 d5 k; I" Q3 q! d9,10 vs 11,12 = 9,10 < 11,12
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( q, A3 W& o9 e" T8 S- iRound 38 w& I7 t# ^4 ~$ Y6 p! h
9 vs 10 = 9 > 10
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The answer is 10.
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0 c+ H& o; s6 J7 X2 _* Y( pe.g. #2 假設7為較輕的一粒- V8 T7 T1 J1 D: m7 Y9 P; }7 |
Round 1
2 M+ A, Q6 f4 Q; A1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
, j2 ]. V) u6 S6 _5,6 vs 7,8 = 5,6 > 7,8& k; W9 i- L- i1 B* P

. z* h6 C7 A* W+ l3 rRound 3
! ^; ^/ p( A" Z8 f7 vs 8 = 7 < 80 V/ b1 k. {, Y0 m9 q# W: j

6 B# m  j6 f6 h% F( b2 JThe answer is 7.6 [# Q& H3 o; B! ], K: V9 ~

( e- `' d% F+ U$ r! De.g. #3 假設13為較輕的一粒
2 d+ b; G* Q  R: Y: s3 cRound 1
4 A7 A# [  e! E8 B1,2,3,4 vs 5,6,7,8 = equal
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Round 2
- X- M- o1 l5 o! {9,10 vs 11,12 = equal
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; W& n! @9 O3 l5 Y* I7 MNo Round 3# o# T0 R$ j) R# w. `5 U/ z

( d# N7 d+ C( j! kThe answer is 13.' u. u  u1 S; V, v1 T4 V
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唔知我答得正唔正確呢?!
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[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:1 {$ j4 c% T, \2 u  {
1.
1 {7 y# g, s* X1-6 vs 7-12
+ O8 ]8 l) F0 \" o% k6 Xif 1-6 = 7-12     13 is fake" \1 Y: H' I$ u1 Z) q6 j

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Weight the 2 time " N5 K1 F0 D8 R8 _2 q
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Suppose 1-6> 7-12& n/ A8 q& }4 N* J4 h, @
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1-3 vs 4-6 0 k2 {% X% H9 ~& h9 d6 @
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Then Weight the Third! X# r. V9 o+ m+ M
3.8 L; y$ g$ E& e8 S0 E! E" e9 Q, @* _
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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+ C0 Y2 b" @% q- @$ kif 4=5 6 is the fake one " d9 K6 R4 j! Z
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if 4>5  4 is the fake one
  e  U! c  c3 r- Rand so on......................

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2 w5 L  H5 r7 r問題第二步
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: B9 K/ K. K: H1 a/ K: p: eWeight 1:  1-6> 7-128 p& b/ e2 i; n0 E' s# I& L

' \. _1 \! S1 z5 e: d3 p& hWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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3 `6 s/ v6 K) O5 ~1 k你第三步点去搵 7-12 边一粒???* a$ E3 J$ U$ p3 [6 C. Y- c

$ q* v# N9 c, y. T========================================) z; Q+ z, ]9 p# |$ e, Z' J5 }

$ k& a3 i% \. @7 ~) C  L問題第三步
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Weight 1:  1-6> 7-12' {1 l1 B3 {0 g# N  [; i& w+ E

* ^) y  a1 F- d( f2 V( ~Weight 2:  4-6 > 1-3   Y5 Q% K) I, x2 G- F
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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