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$ |4 U  M; R2 T) `% W/ N% C* {

& e+ M  S6 R# a『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)。% M3 ]3 G+ p9 e* i( q' f# }( I
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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# r9 d( ~. R3 V, C注意:
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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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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:* f6 D, o& T  H  z9 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,. e, q% g8 Y* o
等我搵下仲在吾在
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' m; B& b7 c2 t. A4 l當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 C. ]$ Z, y" ~7 a/ c6 U13.........
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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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) Q0 T2 P! _1 Y我以前畫左個chart去答,
8 B2 o  Q" F# ^1 H# K等我搵下...

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6 F1 e/ E  h  ]( O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 b6 H  D" W5 X- R9 v) z+ b4 [* `1 U唔識隱藏...已經諗到..

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; V' N6 T/ j1 o* J6 msor !!!....e加改左* }0 d( r9 @% m& |& A+ P4 s& q% R
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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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/ {' U: @! Y3 {0 C( M9 ?5 P0 A) b[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:$ z7 q6 k5 }/ b+ p( q5 C
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:9 }! m* z# a& ?. [/ b
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# Z5 \: ?9 m! e. z5 t+ _PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) W$ r* H% c+ V' D2 yThanks

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8 o# d% \" t/ b不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
5 W( ?3 C) t! c9 q. B' O( W) b1-6 vs 7-124 ]# L( L8 G# A+ {: d
if 1-6 = 7-12     13 is fake
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if not
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  [  z, |8 M6 c* T% dWeight the 2 time - `& [1 }/ R5 }/ h
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Suppose 1-6> 7-12
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/ D7 Z! \$ J9 w4 q1-3 vs 4-6
; a& b8 J2 S8 w+ `6 S1 V5 [2 p/ O6 h* O% Y9 ^! b  V  |9 ^1 A" s
Then Weight the Third
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Suppose 4-6 > 1-3
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3 U% K  ^8 ^" @9 `Just like the first Step$ B' H8 i" ]2 D. }
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4 vs 5 3 I* x9 z! O) o% e8 a, q8 I( r

% {) q, e  _7 c0 Dif 4=5 6 is the fake one . y7 e2 f3 \% e4 G2 _
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if 4>5  4 is the fake one : Q3 o" _' ^# J6 ^

$ S% |, u% C5 f- j* E# S  A, f- zand so on......................

hello1997

分3組4隻波子秤
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/ {& @7 v$ n. @3 d. t, @( h5 [Group A: 1,2,3,4
+ e6 V/ W9 c2 a& cGroup B: 5,6,7,8
) G2 V; b. P2 ^Group C: 9,10,11,12+ K/ G& ^' Z7 J( M) w: Q2 p  b
Group D: 13
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Round 1
, c! k% ^) h3 B5 L2 V1 w' BGroup A vs Group B4 E6 Z& q# C0 o/ J8 t) ~
如A and B一樣, 即較輕一粒在Group C or D  G9 P/ w+ f4 p. d- F

* G) K2 B7 ?5 O4 P9 }* W9 c% O& d/ ZRound 2
* R* u. P% k. ~: g$ j, Z再在Group C拆成:
. r) Y9 ?+ u  w; q* dGroup Ca: 9,10
) o  ^+ i% F) K4 _  X9 TGroup Cb: 11,12
: i) b' A5 J4 z+ x' M  ~$ o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,
2 e* i$ F; S% [# |, A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
- `' y5 u1 A* J' rRound 1
. b5 P/ X  R. d: O  m1 G, A  G1,2,3,4 vs 5,6,7,8 = equal' t/ y: q9 q$ A5 m& j% ]

: T$ F  S. A8 d* H! Y& CRound 22 y9 m/ G  F* x( r9 T
9,10 vs 11,12 = 9,10 < 11,12/ @+ J! G, u9 e  y, `& M* j

+ o. k0 Z% G1 a5 |. p5 ORound 3
: W0 W% @6 K) T; z# ~9 v9 vs 10 = 9 > 10  Q% c. Y! D- Y. P0 ]. M

3 z* l* C5 m; M3 X) w+ v  OThe answer is 10.
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e.g. #2 假設7為較輕的一粒1 |& s  ?% k4 L. n& z1 U5 o* X
Round 1
6 Y4 v8 ?- k. @8 X1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2! |/ I3 k$ I. ^3 N4 B+ H
5,6 vs 7,8 = 5,6 > 7,8
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0 e; _" e- c% V& V3 PRound 3
: I# F) [7 w! a7 ]8 s5 R/ i7 vs 8 = 7 < 8
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# a& Y3 S- _+ I1 K' I4 h- \5 F* rThe answer is 7.0 b- i) @5 T: `# s  L( p

( {6 j9 n% O+ C/ M7 }e.g. #3 假設13為較輕的一粒4 N5 x- S3 {4 j6 A! r; w! ~" r( u
Round 1# U/ P/ c5 @; N, X4 q- j, x( L
1,2,3,4 vs 5,6,7,8 = equal5 {/ `' }: U5 ~
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Round 2
* b4 D' D& N2 l+ R5 M9,10 vs 11,12 = equal
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( j7 W6 Y7 F" d% m' I/ G- ?No Round 30 y0 \' Z8 F8 K- b# W  `

& r7 Q, z6 M0 S* }$ M- s4 K, z9 mThe answer is 13.5 J% Y0 C1 @  ~: e
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唔知我答得正唔正確呢?! ) J' _8 {* ]9 O% `# ^) F( w1 |

. ?9 s+ ?5 O. l[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:6 Y) ?9 o/ v; V2 ^
1.
) i4 Q- j6 n6 k  ]+ v3 V4 j2 V+ Y' d6 v1-6 vs 7-12
7 E1 d# Z$ R: C& aif 1-6 = 7-12     13 is fake' z. ]* m' d6 C4 q5 R5 Y
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if not ! Z) j: ^/ {+ O5 p
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Weight the 2 time 6 \7 p: [) W3 {2 ?9 H* D4 {
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Suppose 1-6> 7-12
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, n2 p( I! x& n% f' d% R5 d7 b1-3 vs 4-6
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2 n( z3 }" {! @Then Weight the Third' E. E8 Z( `* F& n
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Suppose 4-6 > 1-3
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7 |% i( Z: L: q: y. ZJust like the first Step( I5 p- X& D4 A/ ?

# j) f: s- H( t( x1 D: v: d: U% i5 F* x4 vs 5
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" Z8 K( W: e5 t1 }2 h0 T: S' cif 4=5 6 is the fake one
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' e: L) K: K9 g' V- y7 S8 jif 4>5  4 is the fake one % k- e/ r$ T1 l& F5 z. K: _; j
and so on......................

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2 L3 r7 i4 x1 K$ n1 }5 b' l* t問題第二步
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: s6 ]0 I4 k) YWeight 1:  1-6> 7-12: R1 b/ T4 Q- m' c1 U
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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; y4 p: p7 x0 M你第三步点去搵 7-12 边一粒???
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+ G  ^) O7 e/ j3 A, O========================================
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問題第三步) x! ]0 e  I: f! M
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Weight 1:  1-6> 7-12
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" s7 O/ @( H. g+ x' Z  E, cWeight 2:  4-6 > 1-3
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- T# U" v) Q; u5 k3 g& t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