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5 ?- C# E5 ~$ Y7 W7 ^
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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)。
3 ?$ D. S# J0 r0 ]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？』
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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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$ z2 |2 D9 L$ G2. 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9 Z! x/ B& e# y7 c
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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 21:34:1 N# f7 r3 h9 }* I2 w/ c5 C
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 B1 p! i2 ?4 ^2 |
等我搵下仲在吾在8 p2 U- g- g* ~# p. d4 ~
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
* T1 w  ^; y& t13.........
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[ 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,
; Q. r$ `- r& a$ m等我搵下...

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" l7 W; X& Q( @, }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:2 J5 U' D/ K. A
唔識隱藏...已經諗到..

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# C5 r7 G$ r. V" P+ m) K) p7 ~sor !!!....e加改左  W4 i! ^, m0 \8 E- B$ O4 k

1 Q7 o) _" |0 I3 h" M  F1 l2. 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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* D8 H8 l* f0 N' A  Y* l. a[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
6 b, B* [' V! F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.0 C2 _1 h4 W) c# p. t
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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$ q" D6 E7 \8 ePlayPlay, Let me know later who has the right answer and I will add points accordingly./ h  R! s2 e8 w6 p
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Thanks

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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.
) U; e. C% F! n$ n& e2 G8 e3 g) F1-6 vs 7-125 E& x. X. Z! G  {% ~) }6 T% c
if 1-6 = 7-12     13 is fake: F; x5 D, d  V, W  Z7 k
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+ w0 f! ^5 X- i! w2 T7 tWeight the 2 time * F0 g: v6 D- t$ P

; A' ~- _5 P7 a8 i& L. E0 Q. ESuppose 1-6> 7-12
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  n" h+ E* w& b: W1-3 vs 4-6 3 {% }9 J1 v1 S9 O
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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
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4 vs 5
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2 F9 I  |. e2 A" s4 k$ e3 kif 4=5 6 is the fake one
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if 4>5  4 is the fake one 1 M) \' \% m4 K/ E: m

$ o( V! `6 k8 v8 P' E( P! c) @6 R! Aand so on......................

hello1997

分3組4隻波子秤9 ~' d, |' m1 @; W! h

2 U0 F' T- U8 OGroup A: 1,2,3,43 S/ m2 d1 O5 U9 t8 w, C( H# [8 H2 h
Group B: 5,6,7,8
9 a! O& y; u+ D9 ]. oGroup C: 9,10,11,12
) q: m6 }% d: |9 v" ZGroup D: 13
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Round 1
0 {8 B, a9 ^  \/ ~Group A vs Group B. M, q2 s; [3 g5 `9 c( X
如A and B一樣, 即較輕一粒在Group C or D
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5 C9 M+ T7 R1 }  VRound 2+ ~. Y) ]+ m3 q/ I  T
再在Group C拆成:
7 Q! v: g6 a5 d' uGroup Ca: 9,10) s, t4 j% Z& i$ S) ~: c; z& ]5 L
Group Cb: 11,12: G( E1 O. g/ b2 c% g& E
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,
; A5 u% m! F4 M要再秤, Round 3, 之後便知答案.
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/ Q5 `  }7 G, a3 E( `" X  re.g. #1 假設10為較輕的一粒- S. o" A( ?6 ?3 A! P( T/ Y# R
Round 1( ]6 Q3 h( J) c4 R
1,2,3,4 vs 5,6,7,8 = equal" M6 J2 e5 l& A! A' n
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Round 25 `+ T5 p3 h0 n. A; Z. k0 w
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
' K) D$ x. A8 Q0 d: S6 c* E9 vs 10 = 9 > 10
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The answer is 10.
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% ~) x& J# @' n) b) ?6 Y8 [e.g. #2 假設7為較輕的一粒
/ F! u  A9 N& M& tRound 1& A9 z7 t7 r- {7 j! b4 V' ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8  d: i( H6 u! d% v$ Z! k

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5,6 vs 7,8 = 5,6 > 7,8
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Round 3$ @5 h3 F/ L- H& f
7 vs 8 = 7 < 8; J( @4 p/ k9 e6 Z0 I0 G

0 K: n" S, K; l5 }( B2 S0 @4 g, `The answer is 7.
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e.g. #3 假設13為較輕的一粒# k) j' K* ^2 c# i6 u
Round 1
3 Y3 Q- N7 ]/ t" D1,2,3,4 vs 5,6,7,8 = equal: L  V7 g3 k1 @" z+ Q4 e. C& C9 |

! C$ P/ r+ ]% O/ q& w5 e2 IRound 2" D0 |* ?, ~7 P
9,10 vs 11,12 = equal' W  \# t/ m6 G0 w. |

! U% N# v7 H# z# L# s( NNo Round 3: M5 p* C# G8 O5 [& R. f$ w  \
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The answer is 13.$ z7 B4 Q$ r4 n" w# 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:: D( P2 P2 e$ A9 u! A
1.
' H- w* }$ x# S# ?1-6 vs 7-12
2 t  [* g: p' m2 i  G% E8 D8 lif 1-6 = 7-12     13 is fake$ N% j" ?2 B4 H  ]5 w. c7 V, m  O

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7 {0 A8 @) Z$ k& l5 ]" c* bWeight the 2 time
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5 J1 M) D+ R/ P: k( ?& QSuppose 1-6> 7-12$ ?- N5 a: [, u7 A# D" N9 N; b0 L7 N

6 \$ H' C, A8 Q5 _% M' v1-3 vs 4-6
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Then Weight the Third4 f: L9 Z' {7 ^6 @  _
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Suppose 4-6 > 1-3
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5 A) B+ ~/ \, {$ EJust like the first Step
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' s  K$ ]. N. ?' r# y6 b4 vs 5 9 T0 j) J& ~/ y: t4 h
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
- S/ t3 x7 }1 d+ Band so on......................

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問題第二步& t& _7 m; s  s+ V# c4 [' m# J2 C
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Weight 1:  1-6> 7-12
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0 j2 r- x* C% F& LWeight 2:  1-3 vs 4-6 , if 1-3 = 4-68 M; d5 x2 e$ V

6 r5 n! {, Y7 \; J% k你第三步点去搵 7-12 边一粒???1 `2 t5 V2 a8 s1 {3 J

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問題第三步
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" D. }* i% x2 c( s( J7 [/ C+ _Weight 1:  1-6> 7-12, t) ^) y  `, Z8 m- L
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Weight 2:  4-6 > 1-3 ; s7 F3 j9 P2 w8 D6 [7 j& I. ^  K

( z! a; L+ b, @) p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