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)。( w" x* L/ d$ K  h4 Y' n# N
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？』5 K8 c9 b' ^) h; Z5 D8 G

% g  x3 @: h3 `6 D$ V; p注意: : {8 m* T- o/ u' b+ c5 e
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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0 Z% g( N: @' H8 ~, Q0 r  C! r: q% H

( ?  v" J5 M* B* ]: ~9 s2. 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! A: S. s5 B' o( _3 W, ?! ^
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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 21:34:9 f9 s4 ~$ S( h! H& }: C
相信e條題目都有吾少人玩...

6 E$ F8 m/ ^8 A$ h: _& p7 j我以前畫左個chart去答,0 }1 b( S5 o% m2 B
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。; }  g! d$ g& f  e7 B* l& A
13.........
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* i0 R. \- K0 p4 m2 M% R; A1 q[ 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,$ b& w. M$ ]) o0 F$ A
等我搵下...

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* m/ o, ~: w$ `9 v6 X) _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:  n$ C$ s1 q9 [: G! {& e' E
唔識隱藏...已經諗到..

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( m6 h7 _1 n$ ~: A8 U6 L6 X9 esor !!!....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! r' Y* ]# H& a0 x4 |: ]

* ^2 D: r# ?+ D' v[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: v6 w! I9 b4 A  r6 ~
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.: U7 p1 i# b% k7 k: m+ {
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. f' `, Z. ~# E
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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4 D; `& |/ ^, R3 vThanks

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. p7 i& t1 `/ U9 Q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- D- N  @3 |3 l7 Z" q
if 1-6 = 7-12     13 is fake
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if not : M2 A& h; I1 o0 n

; u1 w) C( ~* W: C+ t9 NWeight the 2 time
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  K  g  X9 q% A; ZSuppose 1-6> 7-12& \3 d* u+ k6 A3 J+ L
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1-3 vs 4-6 ' [. q. r2 W6 h5 I/ M, V
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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! H) g# _' R  a7 T% N
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4 vs 5
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if 4=5 6 is the fake one
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% s' t) j5 L) J- `if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤( {- N1 |# m5 v& X- l( Z# G% R

# f  z7 q( K- C7 UGroup A: 1,2,3,48 {8 y$ M+ |/ |) L' N
Group B: 5,6,7,84 e& n* ~* P- s' f
Group C: 9,10,11,12
8 J$ S6 U6 L" D9 o3 TGroup D: 131 k$ _1 P/ y7 h& f4 P; Q5 L/ E" A

( N' f: D" W% ~Round 1) T: Y6 J1 l; t! o7 x( E
Group A vs Group B
6 V4 X* l+ C# \( ^5 E! ?" [如A and B一樣, 即較輕一粒在Group C or D
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Round 2
5 S8 n; W" t+ K% L再在Group C拆成:, k! B9 w7 }- l+ L$ I
Group Ca: 9,109 P& T# t( U# X4 K0 L
Group Cb: 11,12
5 C0 a( g, D' M* ?. m  b+ C9 D然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, ' u: |! _0 Y% c1 h3 F  |
要再秤, Round 3, 之後便知答案.! E2 r- D4 a: r- |- J5 Q) x
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e.g. #1 假設10為較輕的一粒! l& q/ E) C% a! e  x7 ^
Round 1' A4 `3 }- j2 `* [5 X6 d5 r
1,2,3,4 vs 5,6,7,8 = equal+ b5 U* |- \" @
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Round 2
6 J7 k- E1 p# Q: O/ K9,10 vs 11,12 = 9,10 < 11,12* p6 N1 k7 E( p/ R. V8 K
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Round 3$ M) \& C+ V1 a9 Y. ?" G! z
9 vs 10 = 9 > 10
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The answer is 10.
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9 o7 w7 }# q5 o# y2 _8 N9 _, {e.g. #2 假設7為較輕的一粒
, `: `- u/ n2 C& i8 f6 g. _! WRound 1# D9 p/ k( y+ N0 |* N* p0 Z2 X6 R
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ ]% C( l# V% w9 B: z# H

! m% i9 N, D: ]- j* \7 c1 ^3 PRound 20 t" Q$ M6 R2 G7 h1 \
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
# y4 s% ?5 e7 _* C, i3 A5 k0 N. T7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
4 l. y" O/ @  H- M; pRound 12 a; p& e1 q6 i  x+ f0 J2 J
1,2,3,4 vs 5,6,7,8 = equal
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# r. i3 C- N: A2 y% e. [Round 27 s9 f& f" {- G8 U
9,10 vs 11,12 = equal
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No Round 38 O0 o6 g5 J7 w+ D
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The answer is 13." M2 K9 ~7 @# @- v! k
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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:  F! P3 n& L$ E1 n" I! T  I
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1-6 vs 7-12# \" D+ P6 o  p  f
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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5 V  l1 i3 s$ T0 d/ }Suppose 1-6> 7-12! h: r0 B3 Q% G2 r( [0 v  V

2 d+ {4 Z  {5 I( ?1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-39 m5 y5 q% j5 I7 }2 x7 c
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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! K  D6 i2 A& `if 4>5  4 is the fake one * |7 x# [5 x7 n4 G# h
and so on......................

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問題第二步) c1 N+ @8 i; S+ e) l8 ]) y$ Q
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Weight 1:  1-6> 7-12+ X' r' E/ _" K5 R* O" f, D, T
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ E7 X. k4 Y# d& T, x- c1 u# m' x

# Z* [7 k- q! E0 d9 B你第三步点去搵 7-12 边一粒???
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問題第三步. w3 s" \' r1 e! A
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 8 F4 ^. w% E: F4 f) J2 J
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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