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)。" A1 f: }$ k$ e5 D
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？』/ O) Y) E' p) H/ i- f# I

, O- H3 X- R6 B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5 W8 M4 {- I- H  l

" J% O! b4 T# W* n2. 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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6 P4 w4 H' c- O0 s  g[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
  X0 O+ r2 g6 T相信e條題目都有吾少人玩...

" _4 d5 D5 \2 m* c6 V% K2 J5 p我以前畫左個chart去答,
2 f, M* E# R% ?' `/ t, w等我搵下仲在吾在
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1 E: _+ ~& i( R3 s& x7 q當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ x" J) U3 x. _' M) t13.........
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9 L8 L6 u) f$ \& m2 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:
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我以前畫左個chart去答,% `9 r6 \# k/ c) M
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:3 {( C+ X8 n" T; I) s$ y
唔識隱藏...已經諗到..

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sor !!!....e加改左
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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
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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:
. ?8 R3 j- m7 _( s; i3 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.8 r) n8 x5 n5 H6 k8 W5 p2 \8 |

# u$ j$ C) r# ^Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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5 ~' Q; e5 o" C8 {PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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# b5 w2 M. E8 b( g) Q; M& Z7 ?Thanks

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% Y/ k, l6 y' R" Y5 g( _( O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
) ?9 W3 [- E% _3 z4 uif 1-6 = 7-12     13 is fake% B/ u. S# q2 X8 A3 ]3 x
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if not
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Weight the 2 time 3 V' e8 u/ q/ b
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Suppose 1-6> 7-12
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1-3 vs 4-6 $ N7 \. U; a$ y  s3 A% Y! z
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Then Weight the Third2 z( v0 q% ]% ^
3.
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$ D8 U( ]4 ?- [  o: RSuppose 4-6 > 1-3  U% B3 d6 _' o; z0 M
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Just like the first Step/ D1 m" [# H9 S( o
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4 vs 5
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8 E7 a5 \5 E) |! X2 Jif 4=5 6 is the fake one , I9 D) g2 s4 d& ?

& ?" ~$ T1 I1 w  V- Q5 }' v( ~if 4>5  4 is the fake one ' T5 {- P* n+ ?3 P( h1 u

4 A: y" w. w0 o: c! iand so on......................

hello1997

分3組4隻波子秤$ c! k0 f( ]# N7 ^2 R& [; ^
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Group A: 1,2,3,45 V2 W' B3 v: p" \9 g9 @
Group B: 5,6,7,8( d! B: E0 s+ o" ~
Group C: 9,10,11,12
( {: F3 d( Z3 {9 u" T$ q3 F% c* hGroup D: 13" q3 V& M& D$ K+ i6 X" Y

& Y1 |* t- S+ s  i* N) \Round 1
' C8 }$ G8 U4 |8 j+ _3 v- b* WGroup A vs Group B
2 l: b4 t  f2 ^如A and B一樣, 即較輕一粒在Group C or D
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; o0 n2 q& k& C" URound 2
& Z! F. t1 W! Z- t4 G% y, c! b- d, A' z& P再在Group C拆成:
7 Z" n* L0 k1 QGroup Ca: 9,10
$ a- Z$ U2 i2 L+ U$ C' j2 j2 uGroup Cb: 11,12
+ E. s( ~- B/ u然後再秤, 如一樣, 即13為較輕一粒.; {6 F% u6 Z4 Z' H
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如不同, 即較輕一組有一粒較輕波子在其中,
# C0 D* V+ F# V( ?: Q要再秤, Round 3, 之後便知答案.
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3 S1 ~8 O8 k3 l1 E* Oe.g. #1 假設10為較輕的一粒' z+ P: e6 o& v7 |
Round 1$ c3 o" H8 B' Q) [! |2 r- M' t
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
4 I' M' Q# T# f' L7 y; z9,10 vs 11,12 = 9,10 < 11,12
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Round 3
5 R: X- p* _0 ^+ g% J9 vs 10 = 9 > 10, q8 ]2 i2 Z3 o% s$ `5 [- C
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The answer is 10.* [# J9 m3 j& @, z

  [+ f" y' f( S9 O4 ]) De.g. #2 假設7為較輕的一粒
( _4 ^4 _9 J8 A6 @% H% h2 iRound 1; H; @' M  K) ]& M5 u4 Y7 p
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
5 h8 k3 x) x" y5,6 vs 7,8 = 5,6 > 7,8  r0 ~9 J, d* a) P5 z1 G8 q
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Round 3
9 a4 z' B% T# c/ E* K# J9 G1 B! b) |7 vs 8 = 7 < 8- r6 G; {3 Y1 R, `0 _/ N$ J, [

" W$ Y. ^3 c( Q# tThe answer is 7.: }4 a& }# H1 e. P3 p
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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$ d  r# f( J- e1 N( a( V- j, mRound 2& X: g' M- Z! H; f0 K& W
9,10 vs 11,12 = equal
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' ^' D) Y- v, Q( [No Round 3
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# ^4 T1 `" s" D3 PThe answer is 13.
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$ j# ~1 i( h1 Q+ t唔知我答得正唔正確呢?!
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8 f  Q( G5 R3 }+ i[ 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 I! Z/ W/ {3 t
1.
, A! i4 k( c* N" {' l1-6 vs 7-12
' c$ B( g, [  x  m( i8 w) c& _* W/ \if 1-6 = 7-12     13 is fake
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if not & A% N* O# b! |$ u4 U3 f
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Weight the 2 time ' \/ c0 |4 F; f: O" z) T
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Suppose 1-6> 7-12
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3 T8 I6 ^3 U- f0 h2 e! Q  o- C1-3 vs 4-6
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Then Weight the Third
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) ~+ X: O' M- KSuppose 4-6 > 1-3
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Just like the first Step3 m% ?* _) g% j* }# e
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4 vs 5 , T  I& B" L7 g: F6 l

. ~& r+ d6 C% G# s+ i* u0 [if 4=5 6 is the fake one 4 n0 N7 V( Q1 [& `
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if 4>5  4 is the fake one
% y7 l$ Y- W8 c+ T, P9 Rand so on......................

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問題第二步
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. ?  @0 ]$ c3 J' z0 N2 M! XWeight 1:  1-6> 7-127 c, t1 O$ i. n
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-61 M+ B, z; w# ~% n/ D
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你第三步点去搵 7-12 边一粒???
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, H2 K8 M6 B2 M8 e% `, R0 F) w" a, V+ R/ u問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 + j; _; x' w" I2 T; L
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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