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)。
# q% ?" A% Q7 G( J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: & K5 `5 Z' r, L* m

8 z( Z9 E0 A, i. J1. 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0 _; o( b2 J; F3 ?1 w9 A

) C  Z% a! w( g* O5 x1 }[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
% h. o0 H% F. ]) H相信e條題目都有吾少人玩...

* h/ S* r" ~! F1 G- D我以前畫左個chart去答,
. W6 I6 s3 l) ?7 T6 g. r$ N等我搵下仲在吾在4 H' i8 p3 ^6 F- Y. [
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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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2 G* \6 [) w( K[ 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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; ^' r& h' t+ z: m/ ?我以前畫左個chart去答,: K% F: a" [+ I3 N- L
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:8 I$ M# K: H# \
唔識隱藏...已經諗到..

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sor !!!....e加改左
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' z1 X% _9 r1 M4 X2. 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:
# Y) b' `8 l5 l) q2 W4 p4 N9 M. N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.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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9 z/ `% U5 |6 A0 |& jPlayPlay, Let me know later who has the right answer and I will add points accordingly." O, Q7 y, D" s. x& P; s
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Thanks

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+ b4 E9 h% p2 J9 V5 G不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
2 }  u* D9 S' ~! j1-6 vs 7-12
% Z0 V9 @$ f, n; D8 p8 kif 1-6 = 7-12     13 is fake
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0 K( _9 t& Y1 N8 Y( m# @if not
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Weight the 2 time
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Suppose 1-6> 7-12
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; F0 k+ D! ]$ i  U1-3 vs 4-6 7 j( @+ M4 T& u
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Then Weight the Third
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; a! T% _7 U3 a2 w/ p+ W9 I0 B; b! [  [3 ~Suppose 4-6 > 1-3
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+ M4 Z+ I) p2 F( w9 k9 ^; F+ aJust like the first Step' I1 {! R: |* Z2 b5 @2 t& A
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4 vs 5
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if 4=5 6 is the fake one # K, A& b9 M9 R3 B% u/ [! m" @5 M2 o

" \9 q4 b2 s* fif 4>5  4 is the fake one , `9 d# s' t7 i
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and so on......................

hello1997

分3組4隻波子秤" b; {1 c) ^2 U) ~

6 k: |/ E: F: @Group A: 1,2,3,4# f: m0 ~7 Z! D/ g
Group B: 5,6,7,8
& z* R: _+ ~) [0 Y* J, Q, }0 d0 AGroup C: 9,10,11,125 o7 ^) p6 e7 d+ y5 r
Group D: 13
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$ \" a7 Q" d5 p  tRound 14 H5 _! B: b; X
Group A vs Group B' \& G! `- I6 i4 d+ C4 n% ?
如A and B一樣, 即較輕一粒在Group C or D9 r8 e& i/ \7 [% Z: ^. ^
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Round 2
+ _& k# t7 B. B+ v  o再在Group C拆成:: |1 P3 ?- S: X! W, k  U6 m
Group Ca: 9,10
! b, O  @" h: e+ Y9 o! \Group Cb: 11,128 ~: O$ T0 D" A
然後再秤, 如一樣, 即13為較輕一粒.0 u6 n6 y9 B! V% ~8 e
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如不同, 即較輕一組有一粒較輕波子在其中, + w! j8 d% D" \8 E: n' N+ q
要再秤, Round 3, 之後便知答案./ W; m% Q9 D- C
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e.g. #1 假設10為較輕的一粒8 s0 T! D3 |5 l
Round 1  m" e, _( }) U1 l9 O3 ^: r
1,2,3,4 vs 5,6,7,8 = equal
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# z2 V5 S& Y  n8 JRound 22 A% T) X5 q- \6 q% h
9,10 vs 11,12 = 9,10 < 11,12; o! X2 ^5 M0 h/ U

$ `+ j% ?% N% C. _Round 3
) ~: f- h8 }$ p7 I$ c. u9 vs 10 = 9 > 10* p3 U+ f" \! E% v* L7 w7 G2 s: L9 f

9 x. y& y8 ?! j( z; A. q! |The answer is 10.
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,82 B6 S- h4 [0 W
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Round 2
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Round 3* U- T, |* ?' w
7 vs 8 = 7 < 84 c6 N# J/ `3 d& Q8 v1 t& _! r

6 {! }/ `0 D6 n# tThe answer is 7.
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& M7 ~! v% M0 [- `* ne.g. #3 假設13為較輕的一粒
! x5 X2 {4 `* B# V/ w6 Q4 sRound 1
! H/ Y3 l9 t& s- C1,2,3,4 vs 5,6,7,8 = equal4 v$ b; [) j2 ~' X8 d+ o

# ?9 Q4 V6 @9 \1 E2 e& \Round 2
# h! g, y2 `- g/ [9,10 vs 11,12 = equal
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No Round 32 G7 Z+ l* f8 @) c
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The answer is 13.
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唔知我答得正唔正確呢?! 6 l. s9 L, ?, ?" e, W0 x
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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:
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1-6 vs 7-12
$ g" Y' w* i/ v' \if 1-6 = 7-12     13 is fake9 q9 V- V5 S2 f

# s4 k+ D; V# u* X" `( xif not
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9 |4 P$ g3 s! R$ b) IWeight the 2 time : D: t1 }- Z5 t' @' o* c: [3 `
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Suppose 1-6> 7-12
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" j( @8 V' V8 |+ @/ o1-3 vs 4-6
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Then Weight the Third
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9 c9 s4 h9 U2 D  a, xSuppose 4-6 > 1-3
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. K0 F! |8 ~) k, AJust like the first Step9 ]: E+ k( O# m0 C. E) P
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4 vs 5
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0 Z* n; W9 M  B8 i# `if 4=5 6 is the fake one
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if 4>5  4 is the fake one
  Q; u# F$ R) A8 T1 m, W' Gand so on......................

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) t- R( {5 G- J% M# C7 ^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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) B, G0 Z- ]- w. L# A) G  E+ U你第三步点去搵 7-12 边一粒???
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========================================7 [# k$ h$ X  \

4 ~7 J, N$ r  C3 D( S問題第三步
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Weight 1:  1-6> 7-122 s% N. Y4 c) \8 J: E4 u
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Weight 2:  4-6 > 1-3
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/ R7 S7 H& V3 p  z% T: c6 R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