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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6 v3 i+ D6 ?& c; D0 p8 u『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 c  n5 Z: G( P% M9 S
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？』) q9 X! J( F1 G4 D: g; [* A
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注意: & N. K' G  t; w

& C5 b0 ?1 u4 W, y1 s, D! B1. 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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0 h; O0 a& N+ ]  |! c! F$ U& ~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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:9 J4 I2 T& O( R
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,8 P$ H+ g& J4 c5 ]
等我搵下仲在吾在/ a+ q( K2 ?8 |8 G7 A; ?$ b/ P

$ Y" X6 v4 H. |6 F8 C5 N0 j' t2 F0 t& z當日用左37分鐘答１２粒波子，差７分鐘才合格。
* G+ Y5 U! K8 I7 x3 @. h13.........
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8 ^/ P9 }2 ?8 A" |% f3 J[ 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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3 Z- j  ^# |, \$ H  O* ?" _# w我以前畫左個chart去答,
$ C+ C7 x5 [/ i4 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:
2 n! O8 i/ \" P2 q4 _) d2 c唔識隱藏...已經諗到..

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# a1 x3 |. x' }1 C. b* isor !!!....e加改左
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# \1 j/ ~) s$ W4 o2 W2. 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( s+ \9 E3 @$ V9 D& J1 O

1 D- G# C- o7 P( F+ ?) W/ P  G  ][ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:* V$ R7 D2 ^6 q
相信e條題目都有吾少人玩...

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! o. J# [( y4 X+ k7 d& ]PlayPlay, Let me know later who has the right answer and I will add points accordingly.: ^& v0 r# a( }5 \0 T, v) G" ^, R
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. K! z3 f5 r/ n" U' A
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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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* w5 X. U( a* S7 F, w# t3 z5 _- y3 l不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
, {- p' Y4 p. {; Q9 t1-6 vs 7-12- s2 h) `, b7 k# F* Q2 [
if 1-6 = 7-12     13 is fake
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Weight the 2 time # T6 H' _) k. q  h0 ]: Y

9 w- Y$ b+ k' G/ rSuppose 1-6> 7-12
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) H0 G( a% y, A1-3 vs 4-6 9 i; E8 I) X! ~
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Then Weight the Third' p! z6 s* l( \
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: ?* T/ y" |+ t3 I4 Z! hSuppose 4-6 > 1-3# L" k6 A5 h2 S" I4 _8 m! u" \1 G

( [/ P/ Z, y& V' U8 zJust like the first Step7 P" t: I. a3 n& J4 f

' G2 h/ a$ t: w# P8 T4 vs 5
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9 N' o& \  H2 G& gif 4=5 6 is the fake one 9 W% Q3 X  O3 h7 e; \, p
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤* n, T0 v7 H+ z3 |: }; W
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Group A: 1,2,3,4" b! w$ H' ?" E9 v' H9 L
Group B: 5,6,7,8
8 N# `& {: h, t# kGroup C: 9,10,11,12- I0 y8 ]1 \3 a* K; S
Group D: 13. {) W, p8 g& z; U# q0 g
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Round 12 c5 U: M- g% X* c1 P4 v1 n! S
Group A vs Group B2 b+ P8 c  `4 y, f* l
如A and B一樣, 即較輕一粒在Group C or D
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Round 24 r6 o# `; y$ v! P
再在Group C拆成:0 u/ Z0 H8 L* V* E, c7 D; g
Group Ca: 9,101 ~! D# T; v9 N6 K; {
Group Cb: 11,12
2 v) x1 s1 z6 H- j1 }1 O; F, `: W; I然後再秤, 如一樣, 即13為較輕一粒.8 m6 |7 N* C% c  b! b# E5 V
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如不同, 即較輕一組有一粒較輕波子在其中,
7 \" w, x4 ~" @要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒6 A/ ^4 ~6 l1 @# T9 v: B, Q9 a
Round 1( N$ o& D) K8 `1 k1 W
1,2,3,4 vs 5,6,7,8 = equal
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Round 2) }4 K' S( Q; i7 L( z
9,10 vs 11,12 = 9,10 < 11,12+ M5 D0 _/ P: s4 T2 A

6 P/ X+ W  N4 \  rRound 3( E7 g" p2 k8 r" Y1 s8 K
9 vs 10 = 9 > 10
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0 N8 Q9 g4 Q% r) L: Q! r: SThe answer is 10.) l% T( K+ ~' d+ \& e, o
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e.g. #2 假設7為較輕的一粒
. I6 P$ G/ |1 vRound 1
' M1 A( j" e, Z* g& Q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& q+ N$ b# V8 P1 z  F
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Round 2
' T/ y$ `# N: G( q8 ?3 G( k5,6 vs 7,8 = 5,6 > 7,8( \- P) Z( a9 ^2 S9 }+ G. B% _

) r. {! ^! H6 m/ Y) ZRound 3
/ I! D7 h- H) z! V# a% B7 vs 8 = 7 < 83 t' }6 i+ S/ m3 [

; T1 U# [$ h/ j$ e& x; `The answer is 7.
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) J- I# V1 I1 J, ]+ X! L8 ae.g. #3 假設13為較輕的一粒
5 b5 S7 z8 q7 X. XRound 1
% a- s0 M* E. B1 X9 p2 X1,2,3,4 vs 5,6,7,8 = equal
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Round 2- t8 B3 h3 v1 ~) t/ B; ^
9,10 vs 11,12 = equal
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No Round 30 }2 c* H, x+ P. Q
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The answer is 13.
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' w7 u% a' R7 G. H7 b$ X0 _唔知我答得正唔正確呢?! 6 ~5 X  o! L- q  p% T# j% z
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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% a; k. f( w& a5 R5 _
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time : n4 v( y/ ?% V/ k
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Suppose 1-6> 7-124 o9 [- ~4 o& j# f0 R; \
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-30 e% B& O+ s  o( n1 N8 w

( G; ]$ a& [$ \5 ~$ Z6 S, lJust like the first Step
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# }9 n5 m( C6 Z+ w  h4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one % _7 J! [  {9 l8 K# \  L. F2 x
and so on......................

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問題第二步
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# r% A9 m- `$ mWeight 1:  1-6> 7-12: f4 b9 b$ {4 f6 ^/ J; a2 }/ |; n9 ?

4 U% ]2 V; E9 d. p$ a# bWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6' V& J( X$ f- s
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你第三步点去搵 7-12 边一粒???, Q) |. r/ j/ Q/ D5 @

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問題第三步
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Weight 1:  1-6> 7-120 _1 C1 U, _( D5 i- M- c* B) e
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Weight 2:  4-6 > 1-3
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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