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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0 o" Y: }- c# k3 X* \『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)。, S& ?9 I  B; o7 L, V# T
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？』% @# i+ ^5 O3 ^# u1 x/ l& n
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注意: 0 S( `9 \* ?& B" b

" w8 \" ^) F9 r1. 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- z+ H" x/ w; b+ r- Z2 Y
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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. q8 {# [* U% z& i% y/ I% X0 U

$ z7 x4 D8 z9 y6 B[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:. L' a  W$ Q& j- v7 \6 @
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/ m( S* _' P8 ~8 b
等我搵下仲在吾在3 t9 l' K" A5 t
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當日用左37分鐘答１２粒波子，差７分鐘才合格。: O* t- ?  w- F+ G
13.........; H# ]% B3 Q1 V  W) X; X

3 s) V8 F: K+ V6 v$ _[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:+ v3 k& s, V) u; i4 S8 Z
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我以前畫左個chart去答,: X6 K( \4 A% Y- n! i) x- |* x
等我搵下...

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5 _  r) q: W: w# k' x2 e) G% H( 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:) j. m$ \& ~  T  ^! z) F, a# v1 [2 I
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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) R! z/ _, J3 i# ~4 I[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:  ~+ G) _( x" v# n  ?  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.& s( t) }, R' _- x) b6 ~

& A% Y! f+ z( G! b8 o9 DThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ v" F/ x, \1 t5 n5 c+ I
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.6 X5 \5 n- l* F$ z7 d
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Thanks

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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
# E$ A; i# L6 O7 W1 ?. zif 1-6 = 7-12     13 is fake0 ?0 R" ]5 {9 z
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if not 5 i  W) s; L. C4 s1 b  O

2 ]  [9 p; q  k. i0 M5 O6 L" j0 jWeight the 2 time
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2 h4 W8 R+ S  BSuppose 1-6> 7-12
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1-3 vs 4-6 " O& ]" \) ~9 k% ]& s
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Then Weight the Third  W$ h) Q( x+ W% z0 i% u
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+ m/ @2 Y7 f" P% RSuppose 4-6 > 1-38 v: |+ |: r- H) O1 y
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Just like the first Step6 q8 a  f6 [0 [7 N7 M

1 H! b4 z9 C- ?0 w* e9 k% P4 vs 5
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" U0 X) R$ S. V& n* W% G8 Yif 4=5 6 is the fake one
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8 x5 w: n$ ~: c% \" pif 4>5  4 is the fake one 4 n) _1 o, m5 O+ t4 x3 E6 Q. G2 @
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and so on......................

hello1997

分3組4隻波子秤' T  T+ w0 n) p1 X  k7 J
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Group A: 1,2,3,4
4 C$ a( ~, D  M3 g& V  fGroup B: 5,6,7,8
5 i8 k/ ?% d! o4 V0 [Group C: 9,10,11,12( r; V. t4 F. ~5 W+ S6 W& u
Group D: 13
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$ i# ?, d0 S- ]1 b3 u' Q$ X1 u* kRound 1$ e$ q: u' J1 P) Z( E* J
Group A vs Group B1 L; U: T5 ]$ j9 @& q& I
如A and B一樣, 即較輕一粒在Group C or D
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Round 2) I$ ^& @7 \4 K* N1 W3 }
再在Group C拆成:
# A5 J, A) d$ S$ @Group Ca: 9,10
5 x5 }2 F$ T. w9 ~: N& lGroup Cb: 11,126 Z! v$ m$ ]  c) a, r/ Z
然後再秤, 如一樣, 即13為較輕一粒.. t3 R0 \3 q+ z1 W0 G- N, a
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如不同, 即較輕一組有一粒較輕波子在其中,
. \# f/ d* X2 S" K# S1 R/ r要再秤, Round 3, 之後便知答案.8 O9 e. E1 x1 m+ ^5 |/ ^
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e.g. #1 假設10為較輕的一粒, i( t: Q3 y2 k: C2 ?6 |
Round 1* _1 \: U) x1 q1 j& |5 q
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
, B9 F2 S: |$ q2 I* z: e5 w) @$ }9,10 vs 11,12 = 9,10 < 11,12& O/ x, @8 a  U- N
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Round 37 D1 y: @7 f, \# t
9 vs 10 = 9 > 109 b) a. A7 W5 ^. |  S

, u$ t2 o+ \: K6 SThe answer is 10.3 Q4 {$ X1 N8 I+ I* i) H

9 d9 k' [2 Z  Me.g. #2 假設7為較輕的一粒/ V. I9 Q6 d6 j$ |" k3 f2 C& r
Round 1
$ B0 w# b( b" ?1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% z8 t& w2 @& e" \) X' J
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Round 2
3 {' C  y$ F4 b/ s& x0 A' ?5,6 vs 7,8 = 5,6 > 7,8
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Round 3
, p+ I- ^$ U7 N- V# L7 vs 8 = 7 < 86 S$ j- f$ F' @# W. l2 w' W
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The answer is 7.& U7 H  {  \, [; S8 }0 C: b

$ Y$ |" R# Y9 }$ ~! ze.g. #3 假設13為較輕的一粒7 E1 k1 r( r3 Y( V6 k+ K
Round 16 u; E, w: F$ O6 G
1,2,3,4 vs 5,6,7,8 = equal
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Round 23 c. Y# |" M. _+ P  \- J" H3 |. Y
9,10 vs 11,12 = equal4 w, S# z6 }* T- U) o! F

5 C2 F1 N4 V& u3 N: BNo Round 3
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/ v2 l+ p& ?# A7 A  AThe answer is 13.) N2 A9 B/ L0 e5 f8 n

5 L% _( s* ~7 A唔知我答得正唔正確呢?! 6 [* c( i* w3 R: W/ f

# _+ Y/ G& ~& ?2 b& 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:
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1-6 vs 7-12
( E9 B% M1 O& U% S: |9 {if 1-6 = 7-12     13 is fake' g# b1 K# r+ ?! z
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if not . w' {. l; {; `6 M) P7 ~

" U1 u. A5 i7 S5 {Weight the 2 time 0 C2 r  q, s+ D: Z$ a) o
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Suppose 1-6> 7-12
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1-3 vs 4-6 , x! y+ [2 r3 }3 W0 a- P9 _

' R% J( v- Z8 p% z% aThen Weight the Third/ Y( {0 b6 Z3 T9 T0 j' Z" R
3.
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Suppose 4-6 > 1-3
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: ?1 W) X; H3 WJust like the first Step
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# A9 u+ W1 Z9 G' L0 t  y# F4 vs 5
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if 4=5 6 is the fake one ' R3 R# `( |, |. R. \& r3 o
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if 4>5  4 is the fake one
( k( D' e0 g2 wand so on......................

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! K; _. s& s+ l( T% t9 v+ D8 v問題第二步; p/ U5 @8 V8 [! B
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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7 i1 X: ?/ {4 p8 G你第三步点去搵 7-12 边一粒???
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9 [% q9 O: N! H8 [問題第三步8 {, A6 _3 t4 K, a9 L% i* ?

: M+ R+ X0 n# [: A2 TWeight 1:  1-6> 7-12* H' i' q0 E6 {
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Weight 2:  4-6 > 1-3
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, p7 C: w+ a7 y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