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)。  s9 K% _/ }8 X9 N# ^
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 o1 G2 s) Q) \
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注意: % s3 u0 Z& I. U& [
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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: d# {! V2 G7 X0 r- N
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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
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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:
6 t6 y' {: p7 q. g* @0 Y  [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,7 `( i# ^. O# z. X; M7 `
等我搵下仲在吾在
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" J# o! C2 T& ?" j: f8 O/ M當日用左37分鐘答１２粒波子，差７分鐘才合格。
, _! X$ f' r, [3 }% H1 c4 N13.........
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% p% N) l( A' p7 R[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:5 X; d8 ~0 R; F7 Q) l/ O' p5 p; U

& ?, N9 X0 x4 E$ p我以前畫左個chart去答,
' ~! B* M/ y- @) W等我搵下...

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& U4 l' u" j% n4 I0 `, `# v! h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:
' [( I5 y3 }. D! |5 C" l. x% Q唔識隱藏...已經諗到..

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sor !!!....e加改左8 G5 b) v' U5 n  e' b8 P1 O

/ ~" \  Z5 B' S* H- ^2 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
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1 L( l5 Y% Q7 `# ~) _[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:/ Z! O/ Q/ k  o& j9 H
相信e條題目都有吾少人玩...

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: b% q2 P! E3 ]4 C1 NPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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" N( `+ ?+ g* r: BThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.: \- s6 X* W( C- ^; n8 k
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Thanks

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0 F/ p' S2 h% _8 D+ N, e不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.6 `/ {) i  v/ o
1-6 vs 7-12
- J( @( p9 H1 @  pif 1-6 = 7-12     13 is fake
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if not 5 U: B' ?# R7 i/ `

) O3 [, P2 {! C9 Q! G" ~5 ]Weight the 2 time / D; g3 v& E8 L) P9 d

1 x  V: P9 [3 i1 T& t/ RSuppose 1-6> 7-12
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1-3 vs 4-6
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: \" o. L2 H% ?Then Weight the Third8 _1 b& ]6 E0 z3 ]
3.
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. Q- P; T  P' M  p: RSuppose 4-6 > 1-3/ n, A( ?- w6 q6 F9 a5 Y; Y
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Just like the first Step" ^# S: b' z- M5 [+ [& a, t8 r! w, w
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4 vs 5 . e7 Y) {  N3 h% w( H& W- M- U
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if 4=5 6 is the fake one
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3 m3 G$ D! a( h4 Iif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤! ?$ h5 |( {; f

1 ^5 K; B) Y' S" a/ |4 cGroup A: 1,2,3,4
6 X6 m4 w+ p4 I& iGroup B: 5,6,7,8
$ I" m& p6 V: a6 F# ]: u7 MGroup C: 9,10,11,121 t, H& L- o  D/ h6 U( p
Group D: 13
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7 G# ]! t3 F+ ]% a2 K) B' b* C: b, bRound 17 q! U+ r1 S: S1 {1 O; d: V
Group A vs Group B
- U' M9 k! e* X+ {如A and B一樣, 即較輕一粒在Group C or D
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Round 23 G% `; B; q* H: Z* h* J
再在Group C拆成:
* x& j: g  \' u' H0 {, VGroup Ca: 9,10
/ H" G4 m' x, s/ z# `5 b% j+ {Group Cb: 11,12
$ h+ K8 o) E# \3 @# |0 D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,
. I$ f; W: k) p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
9 p/ T3 v" d/ P" cRound 1
6 \! C7 a/ |8 M- u' W8 r3 A1,2,3,4 vs 5,6,7,8 = equal, ?1 L6 ~- u; a
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Round 2. j  F5 Z& T! b! p/ ?% W' D  E
9,10 vs 11,12 = 9,10 < 11,12$ ~  w5 u3 {- b2 L

% L8 T# b0 U% y+ n) Y% rRound 3: o& C9 G: [/ t; _2 O8 N) e' [
9 vs 10 = 9 > 10* y& j$ ]/ i4 G7 I$ Q# s5 a$ D5 m
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The answer is 10.
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3 {- Q2 Q0 ?* Y% e' ve.g. #2 假設7為較輕的一粒2 ~" h+ ]4 Y7 g5 E0 {5 m
Round 1
! I7 f/ @3 k, G1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2, g0 X1 y7 b. b/ l
5,6 vs 7,8 = 5,6 > 7,8- m1 v- }/ \$ s& d7 ^+ K9 H( e/ N
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Round 3+ H8 M; u0 j  G& ^: r# ?1 |$ {
7 vs 8 = 7 < 83 ?" v! T7 }1 \8 E% w
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The answer is 7.
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e.g. #3 假設13為較輕的一粒7 j4 S1 I1 r/ _, M, A! j8 g
Round 1
0 C$ E( O6 i  h1,2,3,4 vs 5,6,7,8 = equal3 K  G* R- w$ }- n; E+ n0 O5 b
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Round 2
8 N6 I$ [- z6 L/ W! D" q9,10 vs 11,12 = equal' |* z/ ^, m6 D0 ?+ j

- d5 t' m9 Q+ w, L0 [. gNo Round 3
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; |/ p6 w8 V6 }4 J/ RThe answer is 13.
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) d- V* F% U1 E  z- q) N2 \唔知我答得正唔正確呢?! % m' x3 }' T8 H$ z" _* ]3 {
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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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8 m" u# V8 P* p8 p1-6 vs 7-12
: u6 t* N0 e  B- w+ r. y1 A/ L) Tif 1-6 = 7-12     13 is fake
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9 I, I% }! L7 Q$ lif not
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Weight the 2 time 6 X4 u0 u! ~( R4 y2 X, \3 x8 ?: }

' q5 H& Z: z3 f2 w/ `/ K. FSuppose 1-6> 7-12
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& k# e7 s1 Q+ M( [8 z- r1-3 vs 4-6 2 \8 S8 T( z$ U* \: c7 M

6 I) A  Y" }( v' iThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step( g4 A6 o# g; j$ N2 ~  u9 q
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4 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
1 ]" B) A" w6 A0 _: _. Band so on......................

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問題第二步
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' t$ C" R, q& Q: c/ ?' J6 sWeight 1:  1-6> 7-12
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9 @. n7 x$ R0 {- M& o# ~Weight 2:  1-3 vs 4-6 , if 1-3 = 4-60 E, O: r3 ^  O* z5 ~! [6 x( u

1 q% h5 U; [% Y+ z% ^8 W* ^( _6 M你第三步点去搵 7-12 边一粒???) x2 ^4 m( ~( W( s

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問題第三步
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Weight 1:  1-6> 7-125 W: X4 V# N5 p7 E8 ]1 y
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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