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)。- S3 h7 S$ ?; ^' y% \/ a
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？』( b4 L! k* c( ^5 H( h# W+ c- t

2 y% }  _. J* |' K: N注意: + w/ d2 l  B; j3 a+ V. a

! a+ \  i4 m# g9 |$ m. ]; M1. 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! G: a/ Z( n- k: K8 @0 a' N

) U2 R" g% U$ N2 m! a. n' f/ z2. 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 i0 ?: H7 f) a  w
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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:
5 F4 F- T5 `, F* ^相信e條題目都有吾少人玩...

4 l( D1 i9 z+ M" ?" U我以前畫左個chart去答,! J- M; p8 u  J0 J5 R0 |
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。7 |; E0 a+ M" ^) i* U
13.........
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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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9 C" ~! r! W% E我以前畫左個chart去答,% ~0 P+ r" d5 G' {1 q+ p
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:
( u& ^9 A3 N* X" N* u) m& c2 y. J* f唔識隱藏...已經諗到..

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sor !!!....e加改左
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
8 F. F& P& W+ n4 ]# x  b相信e條題目都有吾少人玩...

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  J8 z$ r, ?) K* _& {# b4 j: q. EPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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3 ]( ]; e1 |  i" x' ~! h- fThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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% Z  M! S0 z: H3 `4 e0 E6 tPlayPlay, Let me know later who has the right answer and I will add points accordingly.) l. Q# Z, l8 y
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Thanks

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3 W& D1 I& W0 q# ]9 F* j4 u不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
8 B5 s. W. A* D6 Y* Wif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 5 d1 O; F" G6 Q! @# E9 Z$ D* N$ z

/ h0 d0 u2 x& m, s! p+ |* kSuppose 1-6> 7-12
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+ N; ~3 B# K  w1-3 vs 4-6 , Z* X* U/ ?, s( R% X% ~' P
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Then Weight the Third
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$ `+ t# S/ }* |7 _0 k' o5 RSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 $ p: c- f3 v4 o$ F) U, o

& k4 g: R% n3 Y. |if 4=5 6 is the fake one
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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! L- ^* f# ^% N- ^# l1 g3 P& D
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Group A: 1,2,3,43 X. g, F0 B+ j  o3 z, {" [
Group B: 5,6,7,85 q5 r+ Q# F; o: p
Group C: 9,10,11,12! H2 b, w$ s3 a  ?
Group D: 136 w2 R6 }3 Z# R5 ^* G& k

. V# n; c( s. l# Y6 bRound 1" }2 S: M9 N+ [3 [, |
Group A vs Group B
- Z, i* ^5 o2 E. |- ?如A and B一樣, 即較輕一粒在Group C or D7 \7 o8 ^/ h2 z; g% u

$ X3 M" ^: N+ t6 N, O1 O: _* O/ KRound 2
* u) F/ w  ~$ j9 X' o* p: G再在Group C拆成:
4 K6 R, g4 d3 Y$ P4 I3 }Group Ca: 9,10' D8 Q. p( ^$ k, H
Group Cb: 11,12
# u/ ~2 z/ C1 W8 w" e然後再秤, 如一樣, 即13為較輕一粒.' C4 K- [0 D, E% N2 H7 x

# \0 U9 L: h( k* \6 O如不同, 即較輕一組有一粒較輕波子在其中,
/ F7 Q! @0 v4 {% N# p# ?+ f/ x- h5 Y要再秤, Round 3, 之後便知答案.' L" r& {' B  f. }
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e.g. #1 假設10為較輕的一粒
  c9 Z; q, B- n! mRound 1
0 }8 C/ W: U# a6 K8 X0 K0 H- D% Q; T1,2,3,4 vs 5,6,7,8 = equal7 @8 B6 F+ Q! M9 A1 Z! F

/ o, s/ E3 i& ?3 I: E5 fRound 2
' q8 W. k% d4 w2 F( h. Z9,10 vs 11,12 = 9,10 < 11,12: ~0 y  \, a8 t- N' v' N- R

; n- U# C/ N9 k+ u5 SRound 32 N& f$ m" f4 m6 U2 |0 o, n
9 vs 10 = 9 > 10
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The answer is 10.* `5 ~5 R' B5 [! V0 y) a3 Z1 g" _/ p
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e.g. #2 假設7為較輕的一粒. k$ A" e* ]5 f5 D4 d) V
Round 1, t, }' d$ K( l, x6 q9 r4 _
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" X# X9 z: }8 x) H! `+ K$ a6 r0 v3 l+ y
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Round 23 S( V: @( V) o; B, ^- t
5,6 vs 7,8 = 5,6 > 7,8
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7 vs 8 = 7 < 8
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& ?6 }7 ]7 v, }# z/ _; q$ l( |- dThe answer is 7.
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0 ?0 i4 r% m! n9 v% i& @e.g. #3 假設13為較輕的一粒& N0 H6 ]& D* `% \9 l
Round 1
) q9 ]7 k5 v. l2 f1,2,3,4 vs 5,6,7,8 = equal* k; ^2 `+ S+ z5 H+ K) Y' z  T

$ P  A+ M- ~3 p) V8 VRound 2
" B' B' S# ?% H* s9,10 vs 11,12 = equal
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No Round 3) }6 U9 r8 q/ p' c4 P: P
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The answer is 13.
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1 r8 W. F$ B' z  ~, k! _2 s  V唔知我答得正唔正確呢?!
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* g$ A8 Z+ s% r/ J# L8 Y! V[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:3 }4 f3 s- e- s9 ]" N( f4 B8 ~
1.
$ k6 q( H8 ~: G: X  E7 S3 u1 j9 v1-6 vs 7-12* N9 E9 q  H% `2 y% M8 ]
if 1-6 = 7-12     13 is fake1 d9 A  `% {# F% x0 d6 W

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Weight the 2 time
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+ {; w2 M$ c; d- WSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third7 U& ]' F2 X8 J, M# P
3.
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Suppose 4-6 > 1-31 u0 N. J  x: S( x$ N5 x) q0 }$ Y
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Just like the first Step0 g! v1 ^7 P' o( G+ g' e% R/ H

/ O$ y- |$ J: v8 V7 o4 vs 5
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# b- g# m, v2 Y$ z4 u; eif 4=5 6 is the fake one
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% U. f- h. J6 X/ `, Rif 4>5  4 is the fake one
: M0 w7 `7 F# l* k; Z1 }0 Pand so on......................

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: j4 c$ P6 _" F問題第二步
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Weight 1:  1-6> 7-12: m$ \& s4 K+ {
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ k5 l2 D' r2 r* {2 W你第三步点去搵 7-12 边一粒???7 Q# g- p. h' s; p
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========================================8 `& ^2 x  X) `$ V, F
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問題第三步
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) `+ h) C) f9 z0 d/ JWeight 1:  1-6> 7-12
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% Q7 E8 J# N% J+ u/ o+ ?7 {( H2 WWeight 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