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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7 H! \$ N" h1 S0 s『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)。* ]: {, I; L, M, v5 T  b
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？』6 ]2 n* ^! u4 {: p
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注意: ) x) \4 e' M' ]/ `, }& T

5 F; A% J, @) Q- d) e6 v1. 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4 b) H6 E0 t  @/ G( X
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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:: P9 K& I; ?; W: h6 T6 @- Q
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,
6 c( N  [: t' |等我搵下仲在吾在, S. p$ t/ p; g/ M$ V
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
1 e6 t( x% M$ X* F13.........- d$ n% J' j  I/ ]8 \

" u. B# M1 `- x' ]( s8 i7 X[ 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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4 k$ q7 {3 f# R/ S我以前畫左個chart去答,& z4 {- t  |8 u, w" B1 Q- }
等我搵下...

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+ \* a+ c8 M; h: V% K( p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:
  s, G1 A6 j: X/ C唔識隱藏...已經諗到..

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5 e3 F; _3 t- t1 s9 S, v9 k9 b5 nsor !!!....e加改左
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. W; \2 J2 W2 u9 T2 G$ ^. L2. 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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0 l; g1 U7 W' j[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
2 \. m; g+ ]/ P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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  e+ `2 v& ^8 o6 {Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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. g" l  Z" E, V) F7 H3 TPlayPlay, Let me know later who has the right answer and I will add points accordingly.( \/ u3 J! ]2 U, u2 j: H

% `" G9 K6 b% xThanks

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4 C& P# b( D! H5 O; _7 g不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
( B# w; D2 }; J1-6 vs 7-129 r5 ^( y; s3 u6 z0 S# X% D
if 1-6 = 7-12     13 is fake4 t! \+ m- F- r

/ T$ I$ T8 q) `. E3 sif not
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$ k# ?4 ^" W/ n9 ~. ?Weight the 2 time + Z8 x: s( _8 ]' H& _! w9 K
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Suppose 1-6> 7-12
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1-3 vs 4-6
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) z3 a% {: q" A4 ?7 ^+ N$ cThen Weight the Third* t' T- t' l# g- n2 ?5 a
3.
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Suppose 4-6 > 1-3
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. Y4 M- q+ v+ A! `# X4 hJust like the first Step) k: ~1 V! @: \$ r
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4 vs 5 1 ^5 I) w4 y7 L# O

, q, A% L) y' [% gif 4=5 6 is the fake one 0 ^" Q$ G- {& i$ Q
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if 4>5  4 is the fake one
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8 f7 P! C" `% D) ?+ s6 ?and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
/ g9 d+ Z  w4 {, G; qGroup B: 5,6,7,8, @1 g# C6 b- ]" ^/ [1 A
Group C: 9,10,11,12( D# d/ P" u5 A( h
Group D: 13& n( e1 \( _+ n) Y3 y( i
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Round 1/ E; o* a" `% k9 y) Z8 z5 m, L
Group A vs Group B2 t! k" B$ F, \) R$ k. @; j% M
如A and B一樣, 即較輕一粒在Group C or D; f* f4 y/ L7 x' k1 P) F
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Round 2- R$ t6 e8 E, C, T/ _/ c2 d
再在Group C拆成:
& m) Z0 `3 G0 aGroup Ca: 9,10
4 J/ h2 y; n* [- _; fGroup Cb: 11,12
- g- c5 r- m- }然後再秤, 如一樣, 即13為較輕一粒.. Y5 G, Y0 N( }2 b2 l3 M

0 i: ]+ G( g& D6 ^' }4 u如不同, 即較輕一組有一粒較輕波子在其中, - h  H; T" w6 Z! G# E  U& E
要再秤, Round 3, 之後便知答案.+ X% {2 W3 z6 u# ^- S

& v! t+ G, @! I' c) }+ w8 me.g. #1 假設10為較輕的一粒
! ^* v. A. @/ B3 Q& eRound 17 T; i  Z& Y6 O6 b4 `+ k
1,2,3,4 vs 5,6,7,8 = equal
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4 v( _7 K: y2 d! \5 b% f1 n7 \7 F- `Round 2
( f0 T3 P# F1 ]8 x: d9,10 vs 11,12 = 9,10 < 11,12
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Round 3
  v% b  a/ b. F! z0 C9 vs 10 = 9 > 10
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6 O. n, n2 N4 X& S" _The answer is 10.
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+ A+ w; n0 {4 T- s3 r9 u" Me.g. #2 假設7為較輕的一粒
2 a" Q) I' L/ G; MRound 1
& u3 O2 p* ^5 v: C, |1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,85 a2 m* N" q1 |+ D; H0 ~6 }5 f
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Round 25 H& E, m, I& ^' H( d
5,6 vs 7,8 = 5,6 > 7,8
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6 h' }  d" J0 c% r, l0 HRound 3# l- D2 a6 u6 M! r& ?# w
7 vs 8 = 7 < 8
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The answer is 7.( r; W$ ]; U) E- M+ _* y- C% ^

8 G- K, E% v: se.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal: X' r& g* H9 L0 l6 \0 }. i7 N! |6 `
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Round 2
- E% p7 w! Z1 I6 ]- `' [( }9,10 vs 11,12 = equal
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No Round 3/ Y4 }$ u/ _& o
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The answer is 13.
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* H% }7 U4 a8 W4 G" o唔知我答得正唔正確呢?! 1 r+ O5 \$ n5 O. c% C; {. a5 @
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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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1-6 vs 7-12
# K8 U7 `% y- T/ l+ I0 m+ T5 Sif 1-6 = 7-12     13 is fake9 x3 F$ \1 b3 @) D9 A' j4 P

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Weight the 2 time ; L) _' `' V0 ^& {7 s0 C
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Suppose 1-6> 7-129 f1 U! n2 }6 g' [

( x2 ?# ^9 a7 g( ~8 ^' |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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Just like the first Step
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4 vs 5 " B+ s& d1 K; {

% a+ d1 c2 y8 }0 R  i6 F* vif 4=5 6 is the fake one
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if 4>5  4 is the fake one # L+ I2 A1 ^" Y  A
and so on......................

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問題第二步! P( j* I5 V8 r9 E  V8 \
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Weight 1:  1-6> 7-12
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% Q$ ~  v! F5 D& t; X2 T7 XWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6" z8 j: g& n: S0 d
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你第三步点去搵 7-12 边一粒???% m- S& E+ e) y2 G4 b2 T' P
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========================================
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9 R* f/ ^6 m2 ]" p問題第三步
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: m" L) t) G3 r# SWeight 1:  1-6> 7-12# m$ c# \! {3 r- U; Y4 q
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Weight 2:  4-6 > 1-3
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- ~" g( K0 j4 n2 |1 H/ Y: P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