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9 D5 P% b  _8 L3 a0 O, j! s- F
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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)。7 R/ y9 Q) @2 i2 _( w, }+ t
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？』4 B9 A8 V6 O9 Z/ [
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注意: ! j1 t6 M3 |% @4 ^1 {5 Y

9 T) e6 A3 M0 M+ l( {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& f- o. u0 ^3 O. A1 ~8 D& d' ?

  u. `$ ]8 I, n1 }# \# {8 E; {[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:+ b8 V  K9 \" h
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,
+ h; j* q( H6 M0 h+ ~! m* @: @) i- J等我搵下仲在吾在
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" m3 Y7 H. |. f8 L/ i! m" x當日用左37分鐘答１２粒波子，差７分鐘才合格。
' n# S$ g9 q0 J( p13.........
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- G0 w' e/ e# v2 L$ G( T[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
9 k8 U$ b6 N' m8 t! \" x, u% G: C! h% ~( g' Y: V' s3 R' E
我以前畫左個chart去答,
# e  h' D) W- [" D" a! e等我搵下...

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- _4 |8 |2 e' P& Y' O" Z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 b& l' [5 \' [8 }6 T
唔識隱藏...已經諗到..

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sor !!!....e加改左  }% I# G( A! [# _$ U: ~9 U* _) J
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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:, j/ O( D; I$ n$ b8 W9 b
相信e條題目都有吾少人玩...

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& B, a' Q  Q. |8 d% w1 k, S- ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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6 k3 ]# M$ x) S, W) e- c8 kThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. ?- r, u8 k; H" W7 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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Thanks

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/ A! s2 ], D# @* m3 i不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.2 {: m6 M. q5 ^
1-6 vs 7-12# i4 B  J. L& t" }6 X
if 1-6 = 7-12     13 is fake- e; N; H$ k2 M, J
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if not " r2 W' \7 L# I3 n& r9 V

; q( w  D  J) P8 U% P- ~) J5 `; MWeight the 2 time 2 F2 L' G* g& k' h% y

, f) j7 ]  N) s0 q( |5 ZSuppose 1-6> 7-12. c& m3 D! p, ?% ^' \

% w3 C6 H7 `2 s3 Q  i) L( K$ E/ t1-3 vs 4-6 & u9 c8 F9 t4 e" T" d% a

/ X& D$ }6 p  g3 J% ?& F/ I7 M1 XThen Weight the Third7 b) H& B: O. S  V: b+ M
3.0 f$ Q. K% E  n6 ]! ^, m$ `

/ K; }. z! o) `  CSuppose 4-6 > 1-3
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# _+ q# t. T7 }Just like the first Step. ]/ ?5 D- Q! s6 t

, ]% ]! d* {' {4 vs 5 : G+ z. W! @- L

9 ~$ ^" S! V5 A: J" ^if 4=5 6 is the fake one . ]7 w8 T3 r6 Y; D

% p! Y( F8 H+ a7 o$ aif 4>5  4 is the fake one & t  e9 g8 @5 \

3 a5 X' a+ q9 V# Qand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
+ T* j% l- {& Q3 u! XGroup B: 5,6,7,8
+ X/ D. L5 H, Y& |Group C: 9,10,11,12+ ^2 [/ Q5 j* [- Y8 O
Group D: 13
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Round 1
8 X8 z0 ~. ]# Y* g2 f' l* m4 L% B2 ?  f$ @Group A vs Group B: R% P. t7 `& E  I; e, b
如A and B一樣, 即較輕一粒在Group C or D8 ^( Y/ b) Z( O/ R
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Round 2
7 ~4 x. `2 L$ f' g再在Group C拆成:9 y8 v* P( ]7 @; b* U
Group Ca: 9,10
8 J& [, R) r# t" p" w  AGroup Cb: 11,12
* T& X4 J$ _; J0 ~9 g( X/ s# T4 o- O/ C然後再秤, 如一樣, 即13為較輕一粒.8 |3 D  v% Y! T: X7 h7 F0 k; P; \

2 V5 m9 S6 K+ N. z5 o6 F# P如不同, 即較輕一組有一粒較輕波子在其中,
+ G% a2 ^5 w# f$ P. m要再秤, Round 3, 之後便知答案.
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; P+ S1 Z! k  O* |e.g. #1 假設10為較輕的一粒6 I" o& g- V  I" j+ [
Round 1
9 ^7 n' h8 [" S! p  D2 L& O6 w1,2,3,4 vs 5,6,7,8 = equal
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2 ?; A9 m% }0 ~6 MRound 2" n1 W& |7 X5 G0 l4 z' D" Y
9,10 vs 11,12 = 9,10 < 11,12/ i* V$ e4 d& r, V- E  C
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Round 3/ p2 P% X% _9 d6 |8 y8 ]/ t& f! Y
9 vs 10 = 9 > 10
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The answer is 10.) O8 T1 k) ?& T; g

  ^8 a3 A! R9 u5 Q0 de.g. #2 假設7為較輕的一粒
  t. p2 o, p9 K1 DRound 1
) h% ?- L  i4 ^2 P0 z) \1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& G# D0 h: Y6 c* [4 K
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Round 2
8 {0 n, @" {% k& X0 f9 Y5,6 vs 7,8 = 5,6 > 7,86 s8 r: y# y. Z  D) [3 m3 t
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Round 3
# Q% }+ e$ ^* }" B8 x7 vs 8 = 7 < 8
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The answer is 7.( j5 P( C3 N8 ~, V
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e.g. #3 假設13為較輕的一粒9 A# n3 z: ~; K6 p
Round 15 f% S( |2 F: }# J  r
1,2,3,4 vs 5,6,7,8 = equal9 ?: ]6 `& }1 K: S2 D' q
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Round 2
+ B5 Q2 O8 v7 s0 \7 n) ?# h' u9 B+ N9,10 vs 11,12 = equal$ X. o. Q' k& q2 ]. C

: y  p( i6 c+ j) o+ J2 b) M8 m: |No Round 3/ c6 ~, u1 K5 I( y8 N

9 s0 X8 e2 {* }( n3 P+ P8 XThe answer is 13., g; [* i* D; F

5 p/ b) }8 L% K+ u& D$ u唔知我答得正唔正確呢?!
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) W* |6 i5 c3 j  F- N[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:$ a* l6 y" q) _$ }8 f4 c
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1-6 vs 7-12
3 J9 ~. `0 S; k& Lif 1-6 = 7-12     13 is fake
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if not " {/ G  K$ q" ]- n  d
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Weight the 2 time 4 G3 O: M& `' s- O) h* I
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Suppose 1-6> 7-12
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1-3 vs 4-6
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/ j/ ^$ |6 x6 P' }' \9 W. U5 wThen Weight the Third% P8 c. J' ]$ r* e9 V
3.' A4 d8 ^0 Y7 C1 p3 ?( r0 r1 |
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Suppose 4-6 > 1-3
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Just like the first Step
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% ?" S1 u, W5 E) f4 vs 5 8 J) V( E# O2 x4 x
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if 4=5 6 is the fake one
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0 g. x/ |; ]) J4 j$ P4 U% Cif 4>5  4 is the fake one
4 {' Z8 J" d: \: Q9 D4 ?1 wand so on......................

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問題第二步
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- s$ X  `  K8 |& C6 s3 [: OWeight 1:  1-6> 7-12
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" ?  F+ ?, F+ r, i: j! VWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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$ X8 t6 p8 d; B* Q; M========================================/ f- s9 t/ L+ x
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問題第三步
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1 J" l- b% s' b7 J" ?3 WWeight 1:  1-6> 7-12
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/ p+ G' ^( m" |Weight 2:  4-6 > 1-3 / n) Z' O1 ~. D8 Q1 h! T
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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