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)。
. U' `. n$ p% K3 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？』+ }  [- T8 ^% T" @4 }$ R

- h/ J, b) u7 y9 Y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* L  u5 _+ v  L

, g: h3 N- }. v! J$ d[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
/ U" [0 r: D' M  t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,$ c+ u) l6 J( e% K) x6 |
等我搵下仲在吾在( U6 ?0 T4 q3 t' X
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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, A( J. R; G# J) K[ 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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! ]& ^% D( }1 w# Z! e0 A9 U我以前畫左個chart去答,
& l/ F( k: s2 \* ]+ g等我搵下...

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3 Z/ J0 ?0 k, L) K- [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:9 r  e1 ~& a8 M) t/ v1 p+ G+ s
唔識隱藏...已經諗到..

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0 Y" D( `5 d7 z4 g* q- R9 G& Ysor !!!....e加改左8 }% ]" b0 Q$ D# i! `6 ?

) g  N% c" e4 f1 s2. 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  ]: A4 }4 |! ?& i$ Y
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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:7 P% B9 i. [, w2 }4 m
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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0 @; A' x0 p" kThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:5 h2 I) A; p# l: y6 {% o( t
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.. q( J" C2 F2 z2 \9 S" M

/ R! ~* V9 A2 c! x& h- c# ?Thanks

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# p- ~. d; S+ W: N& J* I! i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
' B, [! K$ R* U5 v6 T% qif 1-6 = 7-12     13 is fake; ~8 m/ @) J8 t8 P! m$ M8 Z
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if not
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# o+ }4 [; l2 l6 X6 CWeight the 2 time   N! \) E: [9 F$ l
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Suppose 1-6> 7-128 o, W( |2 ~4 `" L" m$ f

5 e5 u8 ?8 b% P0 F8 e1-3 vs 4-6 6 k# T+ r! t4 [& o
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Then Weight the Third
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" S  j, J; j- S+ aSuppose 4-6 > 1-3( `- g8 D6 P. N7 L7 `- M
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Just like the first Step
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7 m0 Y4 f! g' F; p. i4 vs 5 * M* {5 w$ H. g

$ {1 i. m, {+ g- v* Tif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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2 Q6 z/ f. N/ C7 n: rand so on......................

hello1997

分3組4隻波子秤/ t* B; v/ {; a
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Group A: 1,2,3,4; U. a2 h0 i, K% i1 ?7 J
Group B: 5,6,7,8  d1 H7 l. {  v/ e% [4 h5 V; B  ~
Group C: 9,10,11,125 G7 D& B3 {2 ?9 M& E* W
Group D: 13
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, j8 w, F& m8 F# u  m' Y% w, bRound 18 c( N1 [% @2 r1 B( b  e) L
Group A vs Group B
1 e' N7 t$ E5 o) H# P  X2 F如A and B一樣, 即較輕一粒在Group C or D9 l/ B% I$ B1 R" X

5 |. m6 E3 A% BRound 2
7 a7 p5 c: L' K" e5 i再在Group C拆成:
; M9 M6 `/ k1 ?$ ~Group Ca: 9,10/ z, f. I8 w2 L$ r0 z- E
Group Cb: 11,12
' _( @" |: B4 R6 l$ K8 O, ~8 q; D然後再秤, 如一樣, 即13為較輕一粒.) R* b- J, K- Y$ B: V' v

8 H5 A' R& }+ f; [; l! v如不同, 即較輕一組有一粒較輕波子在其中,
9 k* D8 g& o4 n  G4 r# `- v要再秤, Round 3, 之後便知答案.
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6 }- K" E2 C4 S3 r8 t. N* d2 ne.g. #1 假設10為較輕的一粒3 ^3 N* y% c; T
Round 1
/ S0 D% S6 g9 z$ U4 C1,2,3,4 vs 5,6,7,8 = equal' L! F! J7 x- g
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Round 26 y. Z6 i* ~3 U! e3 b1 O
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
7 T6 z9 F, k8 ^) s+ @# u' c9 vs 10 = 9 > 10
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The answer is 10.& Y. D! }/ {: z
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e.g. #2 假設7為較輕的一粒
& z# k( \8 h9 O. x2 W9 [/ VRound 12 @# p  d; z; n
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 25 y  q& ^% y5 n
5,6 vs 7,8 = 5,6 > 7,8
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/ f8 @3 w+ |1 a& f3 r% S! ?Round 3) T0 P# ?) k& P9 K$ ^
7 vs 8 = 7 < 8
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0 y" Q* _  \" }0 n  KThe answer is 7.
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e.g. #3 假設13為較輕的一粒8 A9 @7 k+ M& m
Round 1
9 l1 J; y- ]% i; h# u- U( v1,2,3,4 vs 5,6,7,8 = equal- c/ f/ X' v6 h6 H

6 H" Q& W3 d* h! R" tRound 2
9 |) f" Q8 ^/ z0 ?1 H6 ?9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.. w: e* S# ~/ _  i
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唔知我答得正唔正確呢?! 4 q+ x! {. A7 ~% j
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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:" B. g/ k- G: _' ~
1.
% ?1 V$ o2 f$ z1-6 vs 7-12) z7 {8 o& J& m
if 1-6 = 7-12     13 is fake
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# a& u  A/ R0 u/ wif not ( D, ?! d% D# n2 s' T. I

) Q  @& \! \- x( H' DWeight the 2 time
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4 ]7 b6 Z4 ^: u- p- PSuppose 1-6> 7-12
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2 D) _' P, g, W& L, _/ E1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3/ t8 J: _$ p, Y6 N

( b1 ?9 B+ x- t9 O! Y2 X+ U; wJust like the first Step
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. s) u: g! y, Z! Z9 ]2 O$ ]) h4 vs 5
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8 N9 p, f1 S8 w3 ~- j1 _if 4=5 6 is the fake one
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if 4>5  4 is the fake one
' l  `( k! ^) m3 {and so on......................

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4 I8 Y! {% E6 b# y0 M問題第二步
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  k, O4 F7 N5 dWeight 1:  1-6> 7-12
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, E+ W. D, K" s3 f. Q. k5 ^6 c3 M& N! qWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ V; I3 ?+ V. i$ @
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你第三步点去搵 7-12 边一粒???; x6 |( x, F7 `: {
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問題第三步
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1 e0 J# J0 U; e4 o4 ?Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 & K2 b6 w) ?( G9 w( H

* y3 [2 D( X, L" ]! g0 l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