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)。
& K7 r, p  e0 W) z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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* [" ^) X1 P& O' A注意: - V) w/ A) J" n$ J7 |/ Q( t
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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0 A- s3 H. L; [+ Y8 o% T

/ V. Y. U4 g2 X" f8 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  , hide 字要連埋 , 內容 = 答案
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; }0 s8 B* t4 K- g; t( b8 C# u[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:, B) @* M+ k$ v/ h$ W! J; N* J3 [
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,
- t! [8 \0 ^$ j/ c% d等我搵下仲在吾在
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8 |- n2 F6 `1 I2 w* e# H* O" b% x9 E當日用左37分鐘答１２粒波子，差７分鐘才合格。+ A5 _1 e/ ~: Z* a" N" v
13.........: w1 ~0 Y7 b3 L! z" L

& f" d9 Z: s; S4 N1 G9 u[ 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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我以前畫左個chart去答,; y4 s. A. S# t& _1 M
等我搵下...

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; v$ v7 |$ U7 _! t$ L1 L3 d4 n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:( O3 w' w" ^( B
唔識隱藏...已經諗到..

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7 w) ^0 e0 b0 I' D+ O: a; {sor !!!....e加改左% {6 ^9 S5 z  ?  b$ i
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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2 A# g6 g3 L3 V; B, t9 R+ o

9 ]- m/ |" U1 i3 G( S[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
& o0 k1 b$ y7 r  q9 d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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1 O# s: @7 C- P' _Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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6 Y- A, ~1 @9 i5 vPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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! t; e7 K8 j2 T0 i: Y6 N9 ?Thanks

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4 P3 Q. N# w* r, D8 B( B" Y不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
# g$ ~* U/ v: J# K) h# R" b, V: C4 B1-6 vs 7-12  a* N* F. h) ^) C  v. e& Q# c
if 1-6 = 7-12     13 is fake
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if not 4 @- b! c# `( q* U& N; C. U

1 M2 o1 p! U* lWeight the 2 time
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3 \/ t. z3 g% s9 o" BSuppose 1-6> 7-12. Z, H1 ?4 a6 e0 O3 S

3 i: i( p" W2 s1-3 vs 4-6 " t0 ^& K1 @) `& S6 W7 s& Q* Q
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Then Weight the Third) p" E) Q" I- N# A; ^
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Suppose 4-6 > 1-3
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Just like the first Step4 O; o2 J. t' p3 Q. q' k+ ^" F

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! I1 E$ \3 I/ Q6 Oif 4=5 6 is the fake one
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+ ?. ^+ b* N3 s1 Wif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤6 \) d; p3 g2 e9 t0 Q# D

5 _3 x5 q# S+ a4 i' P  MGroup A: 1,2,3,4
1 F/ ^6 _; _% oGroup B: 5,6,7,8" l* g1 S3 A7 n. y/ e/ @
Group C: 9,10,11,12/ S5 e; @' d3 h% I) {, k6 X* w6 w
Group D: 13
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$ k% T6 t- e1 D" B! D  \6 q: V0 P5 DRound 11 N3 M% ]8 N1 O3 c3 |" N
Group A vs Group B
  Y/ `* o3 B5 S8 M6 {' o如A and B一樣, 即較輕一粒在Group C or D
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Round 2
: N, ~( H7 T7 J" p2 P  d再在Group C拆成:6 R. k$ O- A- M; u" X7 a
Group Ca: 9,10; m/ o* S. [& l$ c' f2 U
Group Cb: 11,12% ]* N3 Z3 e' \. {9 C
然後再秤, 如一樣, 即13為較輕一粒.1 K. r2 l" _1 p+ r$ M0 ]" {
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如不同, 即較輕一組有一粒較輕波子在其中, 9 O/ L/ J1 j/ p( N7 W
要再秤, Round 3, 之後便知答案.
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7 v  x- N  K" P. f- o0 ?2 V4 de.g. #1 假設10為較輕的一粒  }- l% p( |7 J* F( D( W9 t
Round 1
- V* S) T  ~4 B. b) j1,2,3,4 vs 5,6,7,8 = equal- P6 i1 _3 ^  C
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Round 2
2 X0 p4 m/ o/ x8 w: n9,10 vs 11,12 = 9,10 < 11,121 l2 ?6 C, U* {3 O  R) L# k
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Round 3) h2 r8 r/ M9 r' ?$ o% W
9 vs 10 = 9 > 10
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) U* ^: _0 b7 BThe answer is 10.
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e.g. #2 假設7為較輕的一粒
3 S; m) Y& w+ w) PRound 1
2 p7 _& x7 H: _1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 20 i+ ?9 j; C9 X& Z, q4 G
5,6 vs 7,8 = 5,6 > 7,8* J* C' e) {1 r/ `6 t
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Round 3
3 G# c5 d" t; s7 r7 vs 8 = 7 < 81 w4 P3 d: k1 h& y4 I5 s

! a; j2 [+ r1 ~! I) s2 q+ U1 ^The answer is 7.8 ?: B$ b4 \5 e; H3 u" S8 c
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e.g. #3 假設13為較輕的一粒7 ?% ~  e$ M! {8 Q' @, \' Y4 y. f
Round 1# j+ f+ Q6 o- H1 j
1,2,3,4 vs 5,6,7,8 = equal) ?2 {: B$ ^; Q1 Z5 U6 }

( F* f( G- ]; E% R$ g/ T2 d: r; fRound 2
7 K3 h7 T! [3 ^: B3 Y+ z9,10 vs 11,12 = equal* u  k/ O7 F# V8 o. G0 N( x6 w
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?!
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0 j8 C' p! d+ h0 D[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:4 V' I  F$ m) n
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1-6 vs 7-12! {- b; w% C8 ]1 U, P
if 1-6 = 7-12     13 is fake
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6 |7 |  K. u) R& p, H' u. z; Cif not
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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5 h# y2 Y0 e1 m) ZJust like the first Step
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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 ]' v* {/ X6 K4 q9 E4 q" qand 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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8 o. _7 X  j2 s4 ^9 iWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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0 \- Y* n$ ~' m: y+ L  @你第三步点去搵 7-12 边一粒???# T: i, p) _/ V- O, |# |
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  r+ y! W) J7 `- v& _問題第三步3 M& y( z# `) Z9 v

" Z  o# }$ D) {' @5 z, [8 SWeight 1:  1-6> 7-12( B, |0 i- Q3 J) \, I2 C

7 t, ?6 R2 c+ [* [Weight 2:  4-6 > 1-3 7 I1 l$ N4 c( b7 M9 _
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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