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
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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)。
2 H4 [0 t  o5 L. r! ~' E7 y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？』. S; S: N' D( u+ k5 _) A

8 m9 h9 G0 b7 N, @6 v2 P注意:
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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
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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  , hide 字要連埋 , 內容 = 答案
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  |7 Y9 \. H# H& j. ^' m[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
* n+ q9 X9 h2 @$ m$ B  ?; m8 B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,/ z6 j1 E$ [/ ^" i2 h
等我搵下仲在吾在* ~2 l8 \& ?- Y9 K1 x3 Y" F2 c. F  [
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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# S, e# k3 R) [' U3 W[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
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( H4 J0 s6 m+ _8 E, A我以前畫左個chart去答,
0 ^! Z' d3 J+ S7 e等我搵下...

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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 m6 T9 t1 S8 D9 Z
唔識隱藏...已經諗到..

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sor !!!....e加改左; g/ N' B6 c$ o/ f: F9 o( g
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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& g: W' i! c8 j- ~
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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:9 Z3 f) j/ {7 g' u) J$ x3 J9 G/ O
相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly., q8 r# _7 s% V( \) x2 E. _

- x5 `  t  g+ V% OThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' Z: E+ c- y- c; g

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& x1 x( }! M' nPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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9 \+ P" K/ k/ W/ o5 A' k3 HThanks

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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 i( V4 X3 G  J( k" d1 E% G1-6 vs 7-12: A2 I, {% T8 R, V4 V9 T% a
if 1-6 = 7-12     13 is fake2 d* e& N( D5 ~0 ~! Q0 O0 Z. h

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Weight the 2 time
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, ~8 f3 C! b/ _. ]" d7 _Suppose 1-6> 7-12
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$ g  E$ l) [( o/ m2 i7 _- _; a1-3 vs 4-6 ( i0 y) F; l+ i4 v

" S9 C9 W7 J1 V7 u# PThen Weight the Third
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Suppose 4-6 > 1-3) j- p/ p/ @" r$ o1 S# \6 M+ a( S
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Just like the first Step- [9 o% Q6 ~. D. A

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/ H) l: g, x: l; i1 }  {/ U0 x! pif 4=5 6 is the fake one $ A" y! ?; T9 I4 ]1 Z2 ^

! V3 p2 s; d0 Jif 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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Group A: 1,2,3,4
; x# A) x' i4 d+ ]Group B: 5,6,7,80 f- k9 {1 X# O9 {) E; v. n
Group C: 9,10,11,12# c8 |$ w4 q. d
Group D: 13& _* B# N4 W# f' N; H; G* f

- n3 Y" P9 ?$ lRound 19 j- H. V3 W$ j* k6 T- i- x/ a
Group A vs Group B" @1 d- q2 @, {! q
如A and B一樣, 即較輕一粒在Group C or D4 J! K, }; V' P

4 ~7 [& h( s9 e) b) Q4 fRound 2# z# C! l% N1 U- X+ l6 K0 a& V
再在Group C拆成:
: x' ^/ N, g; w: r# bGroup Ca: 9,10
- J8 i5 p' c5 C3 LGroup Cb: 11,12: `/ ~* z7 j+ Y3 z2 e. a; @7 b0 H
然後再秤, 如一樣, 即13為較輕一粒.2 i$ w! |0 i' a6 n) ?) J: m

* w& j, ]3 S9 u) j) e" u如不同, 即較輕一組有一粒較輕波子在其中,
  k( m& }0 ?# h! f$ B; w要再秤, Round 3, 之後便知答案.6 O; m5 z. q0 B
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e.g. #1 假設10為較輕的一粒: G; ]* |7 k# {! s* k3 s3 q0 P! y
Round 1
, o4 d: P, ~1 p. J; E1,2,3,4 vs 5,6,7,8 = equal, D6 y3 |7 a5 e6 Y5 y) C, w
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Round 2& v1 r5 a1 {9 y  n9 L$ c) a
9,10 vs 11,12 = 9,10 < 11,12
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4 S0 r! t+ L- U( L, kRound 3
) ^' I% I( h/ P; r" G2 ]/ N( L5 C/ @5 N9 vs 10 = 9 > 10$ Q5 x4 s' L3 ?+ M! w# H- b

5 s5 ~! Z& V5 c8 X) j: LThe answer is 10.
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e.g. #2 假設7為較輕的一粒. t4 D; R( U7 r+ }8 x( r' q
Round 1
% l% s! S0 E" q' U2 W- Q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 22 |7 S$ `; S8 |  Y% T" {& d
5,6 vs 7,8 = 5,6 > 7,8* X! c3 e  \3 }9 R# i3 ?( d6 g

  q9 ?( K; ?& l/ nRound 30 F# o: u! @3 t" {3 a- ?
7 vs 8 = 7 < 86 p9 {# H) E: P" `: c

* U3 r1 d, a: c) z+ g# |. ZThe answer is 7.7 ~1 l' ]1 T/ ~3 E
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e.g. #3 假設13為較輕的一粒  K6 R) z0 p3 s  k
Round 1
& {% Z# b9 ?; p5 T, o' N1,2,3,4 vs 5,6,7,8 = equal3 W- v$ L" e& `
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Round 2
+ C5 s8 T5 v6 v, ^! N9,10 vs 11,12 = equal
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, m+ M. a2 q4 F. ?+ k, rNo Round 3$ n: |/ C7 X" @+ L* K( v2 Q! I
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The answer is 13.# i& n, b9 r( F0 ]; S9 _

8 L( n+ u4 M$ G" D- U$ W唔知我答得正唔正確呢?! & j6 a7 o3 r7 h0 @. t/ H

% w8 N* L& G0 |) i; Y- Q+ [[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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1-6 vs 7-12( S  b' @4 D9 n( F3 ^1 ]$ D  C
if 1-6 = 7-12     13 is fake% S6 Z; m& B+ v. Z1 ~+ v. I

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6 d) M2 y3 M2 S- v" V) l. i' wWeight the 2 time + {  d2 l  S+ G6 p" x/ l
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Suppose 1-6> 7-12- a  \  y& u  x7 x* K

# e, n  n  ~0 Y3 l; H8 m1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step+ Y$ }  y8 w* k! A! H6 |1 r

! _' w2 ^' X3 x- U4 G7 {4 vs 5
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) R: g+ T# U5 \if 4=5 6 is the fake one
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& e- ?, R+ u4 D& Pif 4>5  4 is the fake one 4 ^* ]5 L7 h5 E$ J  ~
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12; i* E3 R9 w( K, e3 ?
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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& y/ K- W0 Z) Y- c你第三步点去搵 7-12 边一粒???
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: ?/ W0 J/ c7 ?7 n========================================
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0 x3 X3 I8 d4 K: ^問題第三步4 [6 R! ^$ N5 I
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Weight 1:  1-6> 7-12
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* y! s/ k& Z- ^Weight 2:  4-6 > 1-3
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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