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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' F/ I0 K. J  U8 E9 e『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)。
8 @# w2 N1 _) J' E0 p1 p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？』' D6 X8 N2 D/ Q" |  M6 M: b* z5 C9 [
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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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3 V7 X' m$ y7 Y6 \4 h" j[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
# B$ @+ g4 p0 p" F; g  a  s相信e條題目都有吾少人玩...

! B  U2 r- W6 F. P( F8 H5 f9 ?/ p我以前畫左個chart去答,# m: u' w, ~0 A3 b# F  ^
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。/ P) P6 j* `) C( O* Y
13.........
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& @. f; d2 G8 {- Q0 h[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:; B* s5 l; d7 \4 i" B, t

+ ]: P7 d; {: ?我以前畫左個chart去答," p8 q* k3 i5 V6 j- D
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:
5 k3 @) ~3 r* @, ]' U; _; ^/ c唔識隱藏...已經諗到..

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5 X4 ~  N3 V  x7 isor !!!....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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0 Y9 q0 f. G8 z! J$ T+ J* J[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:- J+ }- ?# k! K4 B$ J
相信e條題目都有吾少人玩...

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9 `+ f8 `4 i5 Q% P/ `" I6 YPlayPlay, Let me know later who has the right answer and I will add points accordingly./ i; a! s5 w8 U/ l: }

: P) ^: T8 x! V9 A1 AThanks

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.
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/ y* j/ h: \. e1 ZThanks

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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.
- B) w# o1 I! ]$ N9 a# ~1-6 vs 7-12
% l& c. W* K% ]- Z4 Uif 1-6 = 7-12     13 is fake; L3 x5 n5 S+ e3 a6 @% _- {
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if not 7 \- x1 H: ?7 |0 Q: f
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Weight the 2 time
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Suppose 1-6> 7-12! |; ^, R. ?+ @" _* o0 }

8 m1 ?7 j& p+ s9 |" A1-3 vs 4-6
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6 k' J4 z+ Q. \4 JThen Weight the Third9 C* h8 T$ [$ \3 b$ J
3.
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" V1 j$ o+ B) K7 O+ wSuppose 4-6 > 1-3
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6 w/ @4 g$ i# C! M, bJust like the first Step
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4 vs 5 5 ]; `, I9 b9 {# h2 h% p$ K# Q
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if 4=5 6 is the fake one 5 g! E* l' T7 `) b) L8 p
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if 4>5  4 is the fake one
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; q) T: @8 t! O2 {5 z& e; ?6 tand so on......................

hello1997

分3組4隻波子秤
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* G/ X& t& Y+ UGroup A: 1,2,3,40 o! N* d  _' O8 i! c  C: _! W- s
Group B: 5,6,7,8
3 v+ |1 E9 f, V3 C& qGroup C: 9,10,11,12( y6 d* U: ?* v+ @4 s6 f
Group D: 13
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Round 1
! U/ d, Q8 y/ ^$ [1 h7 [8 f' WGroup A vs Group B8 ]: g8 n2 ~% {- v( e$ m# H6 c# Q
如A and B一樣, 即較輕一粒在Group C or D
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Round 2. g) ^9 |3 S+ p9 Z! V& w
再在Group C拆成:
+ i1 v; z" l- GGroup Ca: 9,10+ Q; ~: P! S8 I1 o4 e% H
Group Cb: 11,12
1 W! H5 a& S# r! @: D$ m; y然後再秤, 如一樣, 即13為較輕一粒.+ M7 N) _# k. b0 U; R4 g* L, J

& H" n5 P) S, u" b. t% Q如不同, 即較輕一組有一粒較輕波子在其中, ' K; y! F3 p; V4 y; J/ w5 v: N: Q# A
要再秤, Round 3, 之後便知答案.
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) I; n. S' q$ X* p' \5 M; Ke.g. #1 假設10為較輕的一粒$ k- N' s+ p5 G8 d) ^" l1 O
Round 1
! \/ c2 x& L8 J( N3 h1,2,3,4 vs 5,6,7,8 = equal( c4 g) _( r0 q6 F! t; q2 I& s7 h
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Round 29 h2 j( ~! n/ Q) R7 i4 i/ N
9,10 vs 11,12 = 9,10 < 11,12
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Round 32 s; C5 U2 P5 `+ z6 I
9 vs 10 = 9 > 10% x( c8 B; l9 [4 d
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The answer is 10.: p. t& R! r( `+ f4 n7 |# P" d
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e.g. #2 假設7為較輕的一粒" `' t$ `! I9 P2 ]3 Q- ]  G0 d+ S, X
Round 1
9 P+ S7 F  ?! d( \3 O1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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" D1 [7 a2 y* C& T0 D% b% VRound 28 G( s# a: J5 h9 l7 e5 g3 @
5,6 vs 7,8 = 5,6 > 7,8
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7 B+ x2 G. `: u# c/ R+ _6 h4 b+ M# HRound 3" u! I9 v9 l. w( j0 M
7 vs 8 = 7 < 86 W8 w$ m6 {0 O5 _3 w- _& x

  c$ h8 f- h3 T4 c; _# W- i1 eThe answer is 7.
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e.g. #3 假設13為較輕的一粒
  [% X9 E7 D- [7 X6 lRound 1; K" N: G" l- k  X
1,2,3,4 vs 5,6,7,8 = equal
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' l* k' X) }% S5 p# [Round 27 V8 [- V. `" _5 L
9,10 vs 11,12 = equal
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/ p3 o/ O$ P4 Q* H2 l- r8 Z- t8 P) hNo Round 39 F( ~1 a4 J+ S3 l- B, q
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The answer is 13.
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8 ^9 Q; \" L' ]: N3 G! q唔知我答得正唔正確呢?!
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, v0 a- k9 j  _% g4 T[ 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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* m# k" g- B) B3 l5 W$ C9 \, e, W' g1-6 vs 7-12
; _; n9 d$ J- N( j. z/ ]if 1-6 = 7-12     13 is fake
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if not 0 s, Q1 C5 ~1 u$ {% j& i  q5 ~
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Weight the 2 time ' A1 e% J% z, J* o

: W5 J7 F8 y% M! `4 sSuppose 1-6> 7-12) d+ K" X4 \, [" X9 L/ b) Y/ \

) ~4 S/ j" A; L& S& K- s1-3 vs 4-6
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0 z. B2 t- C# O2 n9 G9 k8 u* c( f; NThen Weight the Third
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Suppose 4-6 > 1-3  e! j+ J/ b' [

% f2 F. o) ?9 C3 e1 R/ |Just like the first Step7 h% K- n- h  ~8 o( ?

5 F1 s/ R" G3 c/ B$ N4 vs 5 0 d; Z& Y% H& _* D

$ P* Z- h  ~9 J2 s8 a. @5 f$ l3 ?if 4=5 6 is the fake one
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if 4>5  4 is the fake one 2 m4 o: X& i2 }+ L# {
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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. L! D! K( M6 ]& D你第三步点去搵 7-12 边一粒???
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========================================
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0 m4 d. G: J: Z4 e問題第三步) G$ i( t1 x# c' z- M* D. H

% M0 t1 z* C: w) \7 tWeight 1:  1-6> 7-12" t3 o' v0 Q2 u' z

" [! B2 Y& \" M8 U+ B4 \! `* fWeight 2:  4-6 > 1-3 4 v+ Y$ {" f# C0 |* ~& h
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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