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8 ~3 r) ]6 \; R
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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)。
8 r& a1 H! g' G  P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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注意:   Q7 N$ i# i. }  X* n, C, }
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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7 K! T- |! z' O( l% c1 o- f
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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:- a7 f5 w- W9 T1 c
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,9 k; Y/ c  L8 ]- R: m
等我搵下仲在吾在+ n2 s1 o* g  j2 P4 }' {

2 H9 q4 M6 L! H8 K5 J! e當日用左37分鐘答１２粒波子，差７分鐘才合格。5 F, I! f" v  O% I. a
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:' @8 x9 L0 j( c+ W0 v% d

; I; b2 N0 A9 z: p7 y7 l我以前畫左個chart去答,
. ^( ]8 S1 l; J3 p. w! h, P& 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:
" w% J) |- E( R1 ~- O* X唔識隱藏...已經諗到..

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sor !!!....e加改左! h2 }: ^, @) U8 T
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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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' g6 r: E8 R, M* @' E5 ^5 u[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:* K: q: D, f5 i5 m7 k9 t
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.3 Z) z" a3 n! A

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ q2 b3 |" y1 i6 C9 d" \

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% Z! I3 @7 v# j  R; X7 j0 pPlayPlay, Let me know later who has the right answer and I will add points accordingly.$ ^0 l3 V3 d! ^9 ~

! [2 U% s( ?6 p$ N' O, dThanks

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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  V4 G7 }* z+ A. h
if 1-6 = 7-12     13 is fake
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3 u) P. {" _+ d& d( W; u. m* \if not
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! R" c0 A# \' @- J) `+ F8 k$ VWeight the 2 time 6 D8 {( E/ ~# L3 @+ Z% x

0 F2 E' H6 E8 N. SSuppose 1-6> 7-128 g0 k' o3 g: r: C

! ^' E' F+ ]3 ?7 {! {/ Y4 W1-3 vs 4-6
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1 E7 z7 A3 Q$ h) r  @+ a+ J/ @7 {Then Weight the Third8 J2 _2 P  T' K. r
3.
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Suppose 4-6 > 1-3
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Just like the first Step, e; Y, Y/ z. O2 J5 j8 |( q
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4 vs 5 / ?. D; G; U9 Q) v( G* j2 T6 U% y

7 r0 B& K4 F& F" n/ Q* G* l" kif 4=5 6 is the fake one
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: {2 y: P4 W( p* u9 A4 q6 |1 O  \if 4>5  4 is the fake one 4 F* o* f# g4 K7 Z6 f2 ~: }6 H( h

( |% D+ S, R% Rand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
" V/ |9 [) y- n+ \  |2 }. {  OGroup B: 5,6,7,8
1 c% c6 A4 A7 e( O+ V, \4 Y4 BGroup C: 9,10,11,12
" N8 }, a: Z9 I5 e( pGroup D: 13; O" J) g$ o1 D; B6 y8 Z( z( @

. Z' [  e' w3 t1 T" R2 p0 ERound 17 p- R. k' r5 L7 S( D# x
Group A vs Group B1 A' n( b2 ~" Q
如A and B一樣, 即較輕一粒在Group C or D
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Round 2" ^' k7 k9 _) G
再在Group C拆成:
/ F( ^5 A' z4 D' OGroup Ca: 9,10' M; g& u! I% _' X' S! {* @# Q
Group Cb: 11,12! k6 w- _6 l6 v/ X. V" r2 o
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
9 `. b0 Q6 ~5 X! h要再秤, Round 3, 之後便知答案.
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$ C, c% r9 m& R3 U* s& j$ le.g. #1 假設10為較輕的一粒
+ V; N+ q+ [. l+ ZRound 1& \+ o% L% u% [2 c
1,2,3,4 vs 5,6,7,8 = equal( q, U# _7 W! w/ b/ g
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Round 2) I+ b  H( E9 g8 i5 b4 \6 ?
9,10 vs 11,12 = 9,10 < 11,122 y2 t* R" B8 P! N; J+ K
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Round 3# J$ g, n6 T3 B
9 vs 10 = 9 > 10" }4 }: g& h/ @
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The answer is 10.6 ]2 s' D0 F7 v' e4 M
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e.g. #2 假設7為較輕的一粒# u( \& h# t5 s, A  J# G. ]
Round 1
- C7 w+ T  v# O1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ O. C7 C/ f: e0 LRound 2
% d, W7 K8 K6 h0 e1 G5,6 vs 7,8 = 5,6 > 7,8
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/ V8 G; Y3 l1 |. F- o. G! ^Round 3
# O# R2 w2 ^) N) m5 R: Y7 B" O! m! X7 vs 8 = 7 < 8$ c4 U' l5 c5 L* R
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The answer is 7.( x, h( |6 ?. i. |, D4 k

. b! g  A5 r% o- C  B9 z0 Q; U4 x) |e.g. #3 假設13為較輕的一粒% t  c3 [  m) Y4 @; z* b
Round 1
9 V& X& J- t4 u, a1,2,3,4 vs 5,6,7,8 = equal7 D, p6 }7 R% Q

( L* ^0 j0 Y" i: l8 S& r% c- ^) e- URound 2. o$ ~# k5 Q+ x/ @: x+ I
9,10 vs 11,12 = equal( Y) e) e0 G; _/ y! D

7 ?% k5 ?3 B) L$ Z8 vNo Round 3$ M8 B- s8 C, ?4 B
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The answer is 13./ b" N. F) t5 [
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唔知我答得正唔正確呢?!
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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:. l: G3 x! {# H4 J. @5 h3 h+ i
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1-6 vs 7-12
* d8 o9 |# t2 d5 sif 1-6 = 7-12     13 is fake3 {' B  @  z2 B' ?& a9 q' p/ H( r
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if not
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# v, H5 U7 u7 d5 WWeight the 2 time 7 Q4 {5 |* ]4 Y1 ]

0 i- ]" c6 _9 T& L& NSuppose 1-6> 7-12
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1-3 vs 4-6 ( u/ o& Z* b% E1 a/ [0 J% Z4 H

/ g  R; w. O+ RThen Weight the Third. Q0 }. ^8 @; _3 K' X* V
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Suppose 4-6 > 1-32 b% s, X% G+ O& O

, b+ p" z! [* e1 }Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one $ R% B( V4 z+ R+ i; n) s. b
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if 4>5  4 is the fake one
# p% a3 S' f& y  A7 tand so on......................

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問題第二步3 [" {. ]( Y+ C9 R# x9 f

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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6) l$ D& c5 [8 T" ]

6 b/ R6 w, P# h" {5 {# e8 D你第三步点去搵 7-12 边一粒???
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# Q6 {8 h& I) R* C* t* r========================================
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8 H& {5 {$ j% U' I5 h. M8 v問題第三步
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! M+ W  w! L- U1 k" mWeight 1:  1-6> 7-12" @0 c' U8 L; [: j
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Weight 2:  4-6 > 1-3   l+ b- I' ]; ~- }/ _. W! p
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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