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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* ~8 t8 x6 m3 _$ E7 t% F『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)。: s! g9 q" Q1 a
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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/ C. |) e' u) |/ c+ o; K注意: ! b, z5 u" _- `& y) M. v
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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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% `3 p, f$ c$ T* o# [. t; ^, A+ m2. 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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- ~' H3 N' c! W[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ P5 Z) B1 M- a
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,) [) x9 l- G' F! n$ G" C
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。
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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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% n' D: N& P; s8 d+ m我以前畫左個chart去答,+ a( G1 q% a5 D) ?' G1 i
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:6 L+ g0 V, Z" _5 A* ~# K% P
唔識隱藏...已經諗到..

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$ e0 w# x8 |! Wsor !!!....e加改左
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5 P: E! R' Y* W4 [, F( r2. 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2 S1 |5 M- G& U- o: g/ v2 K7 o: R

  u) i7 J: }: Z7 g! Z[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:- W5 l! B8 h; ~6 }( [
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.6 P! }! A* j& M& p8 X- I4 t
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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  Z. f5 ~1 b& K& UPlayPlay, Let me know later who has the right answer and I will add points accordingly.  W: r* R' A7 |& i0 N; C

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0 P) H. l1 B: t# C  w( K# F不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 g7 c- v9 M1 [' W1-6 vs 7-12
2 m. a3 x" ]/ Q+ Dif 1-6 = 7-12     13 is fake% d5 L* M$ m9 ?7 q+ P

. v4 g- h' U* n$ `, j1 D- x) R0 E7 iif not
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% X; ^+ v! A0 Z: ?Weight the 2 time
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9 j, t, ~* S2 A7 [2 RSuppose 1-6> 7-123 F) j1 |, X4 k; ?$ O  l  C

8 B7 G$ Y& _+ r2 Z1-3 vs 4-6
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: W1 |1 Z+ I; K2 o3 c- O/ f% U* ~Then Weight the Third0 H* i: p( J" B" b1 `0 m  P$ y
3.
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* ^$ ^% ?" c1 O6 sSuppose 4-6 > 1-3
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  a1 I! k4 c1 a( g2 T" nJust like the first Step: l& A1 Y( X! z7 U+ I( Q

5 ~5 C% \# I+ G4 vs 5 - z- ]* C$ V# y" I# a& V" Z4 o- k

$ l, Y2 f! H( j6 yif 4=5 6 is the fake one
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+ w8 T4 i' }& B7 k# y( hif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
/ d, t" p4 E( e7 P/ UGroup B: 5,6,7,86 e5 V% j$ t/ U) R, g
Group C: 9,10,11,126 [- V; h% D, O  h4 x
Group D: 13
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Round 1; q5 R% e- G' \5 E( m% r
Group A vs Group B
. o/ z; c; f- `3 S如A and B一樣, 即較輕一粒在Group C or D
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Round 2
- p( e! N, f: Z9 i# Y! p/ q再在Group C拆成:
7 o9 ^, ?' p; J# k" sGroup Ca: 9,108 e/ E8 l. a2 N7 A1 b2 _, _) N
Group Cb: 11,12# p9 e: ~& P$ N/ @
然後再秤, 如一樣, 即13為較輕一粒.8 }* C, i% |1 U& t6 m1 U" C

  X7 [- o0 B: b: U! _如不同, 即較輕一組有一粒較輕波子在其中, - H+ `% b' j! ^( |+ R( u
要再秤, Round 3, 之後便知答案.( t! ^* O/ @/ x4 U
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e.g. #1 假設10為較輕的一粒
- @' T& s7 P# m' eRound 1# n" G4 y# i8 p+ A) d
1,2,3,4 vs 5,6,7,8 = equal% J& T% M' {) }! C
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Round 2
) r) W) H8 N0 Y' N9,10 vs 11,12 = 9,10 < 11,12
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. `: p' B" p  CRound 3
3 ?5 z, E: O7 V0 [9 vs 10 = 9 > 10
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4 B* V; @/ i5 j" a; i& [. tThe answer is 10.5 P6 s/ Z1 G* k: x1 |0 F9 |

; t9 @4 L* S4 we.g. #2 假設7為較輕的一粒
* \0 O1 J  I: W8 M* JRound 1: g  X0 p- D, Y1 u
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" v' J, }" _. K+ @6 k

+ M) ]. ~& @2 `0 X5 ]5 n8 qRound 2( H" Y% I, d: g- N
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
, Z1 U8 [; d3 M, w) q0 h7 vs 8 = 7 < 8% k! `2 r' _% ]; T$ }& J, O. z8 ^
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The answer is 7./ s( e6 R  Y7 Q+ e

  a% Q0 p! N& p3 `, p# le.g. #3 假設13為較輕的一粒
' h) E, r1 j& I% kRound 1
$ \/ K! a6 Y" r1 z/ V1,2,3,4 vs 5,6,7,8 = equal
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: M3 _$ g( ?% R. i2 ARound 2
3 e# P! U' J9 g! H0 h& z, V' g" q! E9,10 vs 11,12 = equal
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' e2 _5 @/ v- Y6 R/ yNo Round 3
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The answer is 13.
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# S  _) O9 h7 V5 {* M/ X6 R; g唔知我答得正唔正確呢?! ) \; ?5 s1 K4 e' S4 ?) F$ L' }/ _
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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:9 i4 Q5 p. f- M
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1-6 vs 7-12: [' _- W2 w$ D' g" x# `
if 1-6 = 7-12     13 is fake8 Q6 ^0 x  J3 v6 V
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if not
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: Y5 ^* W8 \, W( H  v4 b+ w8 ^Weight the 2 time
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/ t3 ^7 Y9 b! a- \, y/ T8 q8 pSuppose 1-6> 7-12' l2 e, X; i5 s& {  R" v9 G  c
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1-3 vs 4-6 6 b5 i3 g5 z+ l6 E7 D9 l% O2 b

  M, [( e4 r7 M, {Then Weight the Third
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Suppose 4-6 > 1-31 ~" @9 Q9 V3 i4 S' ]0 {2 ~
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Just like the first Step2 A# }2 z$ |, _2 F* z3 ?6 \& G! j6 `8 O

! G' T/ T* F# [: A8 U4 M7 Q4 vs 5 9 P4 s1 w/ U, v. `5 i  p1 T

/ V+ t6 O0 d$ ?0 e6 |if 4=5 6 is the fake one
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if 4>5  4 is the fake one
5 Y" Z4 D6 I5 c# fand 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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3 Q6 A8 Z$ E3 ~8 BWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6( n/ v2 {9 ]$ w8 Q% Q& Y; I
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你第三步点去搵 7-12 边一粒???' K' f6 Q) n) X  z
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問題第三步
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Weight 1:  1-6> 7-12
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& k5 Q3 E9 |, H3 E6 I/ Y* QWeight 2:  4-6 > 1-3
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" H# x; R3 t- {: F# U; K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