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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* t7 y/ @0 \% J( W; ?/ G2 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)。" g% k0 E1 g& |+ }7 R. z
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？』# z' G9 q  U& n; D3 y& N

& n1 D6 R, S2 S2 d/ v2 z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  t; O5 X/ M6 ]

% @& P% D% H7 c3 e4 {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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2 }' l/ L; p6 \$ o1 g+ X2 }[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
4 I2 W& s2 _1 S" W$ X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,
! ]1 }3 m8 M) G# [8 |等我搵下仲在吾在
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, _! w2 J9 f" q" D; `8 ]當日用左37分鐘答１２粒波子，差７分鐘才合格。% P( N8 V1 ]( r, a* Z4 E
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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我以前畫左個chart去答,
/ Q. e) o% @) p9 J+ g- r  F# D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:
3 R2 O2 ]5 I' Y1 Z唔識隱藏...已經諗到..

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. Z' l- W( }* H) `6 D) Osor !!!....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:
4 L* z9 n4 }) k2 H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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# }% D$ w9 `2 m3 a: YThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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& C! N, |5 |* X0 @8 FPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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+ [# \' d- v1 E$ d/ b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
# i3 [. y3 d/ N. f# rif 1-6 = 7-12     13 is fake) ?: s( {+ x2 H, }$ j# @

8 g" O& ^" w  Z3 g, ~2 C+ U. eif not
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* p) }* r1 ~, L" {" P7 A; h$ O. @Weight the 2 time - J0 p. G4 d3 E8 ~6 W
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Suppose 1-6> 7-12
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1-3 vs 4-6 . l5 x4 e& s; b
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Then Weight the Third! C& I) \/ P( h- B; u
3.
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Suppose 4-6 > 1-3+ s0 s! f( z8 T5 Z
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Just like the first Step+ {; k8 Y# {) c. J
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4 vs 5
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( T1 w9 M6 j" N0 r5 J0 dif 4=5 6 is the fake one
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* {5 Z) K: F% B, V5 `; l+ F, \if 4>5  4 is the fake one
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) O0 e" R0 G9 u& hand so on......................

hello1997

分3組4隻波子秤
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* K& v4 J$ N. m2 MGroup A: 1,2,3,4
8 G5 I4 O$ _& M7 l" |7 BGroup B: 5,6,7,87 [, i* B: t5 b5 g  M# T# H
Group C: 9,10,11,129 J% U9 H/ Q# c1 x: h
Group D: 136 ?" M% b1 y. @" p: S
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Round 1
7 \$ i& F( ]3 D; B+ YGroup A vs Group B
3 Q$ x! e  E( E: j3 \" q如A and B一樣, 即較輕一粒在Group C or D
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Round 2
0 C- W! s2 K$ R; W+ K再在Group C拆成:) z' ]5 @* r6 M9 P8 Y
Group Ca: 9,10" L2 N, V, y4 ]' n
Group Cb: 11,12$ ?  s! b) y* g4 ^5 C- U: l5 d  t
然後再秤, 如一樣, 即13為較輕一粒.
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& M8 o% _, _' W/ Q如不同, 即較輕一組有一粒較輕波子在其中,   v, o3 r; X) `( \  e* y
要再秤, Round 3, 之後便知答案.
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- z/ A' y9 R" U; P7 G$ Z$ A# ~e.g. #1 假設10為較輕的一粒
1 w$ O# X* v/ M5 h! ]Round 19 w) t9 }' {% r  @! \7 i% d
1,2,3,4 vs 5,6,7,8 = equal; p$ s4 L& o; Q; r% b9 ]6 [8 H. n
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Round 2
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Round 3
/ C: h$ \. S. b% O; Q. \9 vs 10 = 9 > 10
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The answer is 10.
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$ C; e/ L9 `5 `6 W( ?2 R6 j4 Ve.g. #2 假設7為較輕的一粒  m' o# w1 U( D( X0 j$ O; M3 W
Round 1
: @7 @3 F# o9 v5 ^1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 29 ~" S7 F3 E9 K5 @3 ~
5,6 vs 7,8 = 5,6 > 7,8; m+ [) K/ T, R$ G9 N1 r
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Round 33 o& i8 M3 D' @; h0 y- [8 W# e2 f% B
7 vs 8 = 7 < 88 \! B8 O4 S' T. a7 g6 H2 j

9 w1 W+ j7 j! I  e2 O. [* N1 o, hThe answer is 7.. S- g, \% D7 K

: ]- T2 x( r$ fe.g. #3 假設13為較輕的一粒# A% L" h; K' P5 C9 b7 F
Round 1
6 i+ G9 j; i( o* P- S1 r$ P( q1,2,3,4 vs 5,6,7,8 = equal& \. T, n) Q0 k2 M- p8 `9 M
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Round 2
& Q2 E( @- o: _$ X! k9,10 vs 11,12 = equal
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9 Y6 }2 F9 C: K% HNo Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! & @0 ?. r4 D1 C7 F' j

& I* n" m2 o( F4 I; U2 a+ C$ c[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:& n/ S" o5 S1 y6 O
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1-6 vs 7-122 S! i) ]( b% j6 E: U
if 1-6 = 7-12     13 is fake
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if not 4 `2 _3 |) ~; \! q" z+ j: i
. D6 P7 a2 i; E; I+ _
Weight the 2 time $ }9 E  F" U0 ^0 [4 x& t
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Suppose 1-6> 7-12, Q& V. f8 c3 V6 h. o
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1-3 vs 4-6
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0 j( U( A$ U2 t( z6 a8 d) H# |8 ?Then Weight the Third& ~3 p# F7 B8 G' W: w, f
3.
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9 T  U( e# t, I/ C' XSuppose 4-6 > 1-3- N4 @. c( N: R
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Just like the first Step9 y, |$ R. O' w# v! H4 M7 _
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4 vs 5 ' h& e, t6 |/ {; q( g7 ?' ^

6 N4 q9 Y7 N9 k5 |: Yif 4=5 6 is the fake one
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: I; ]1 w7 o; f* X+ q8 r2 i+ ]' E  ^if 4>5  4 is the fake one
. s4 G% W  J8 {, D) T8 S0 ]6 s$ xand so on......................

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問題第二步" J2 I- p: ~( _: R" ^& S. Q* |# Y* ^/ h
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Weight 1:  1-6> 7-12
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8 k. Q6 g% W0 m6 n3 sWeight 2:  1-3 vs 4-6 , if 1-3 = 4-60 K  L8 A$ D% p6 j" V
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你第三步点去搵 7-12 边一粒???- R8 [& `1 Y1 s: {/ ~6 l7 X

3 `8 [( l* e( x2 R4 i========================================
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問題第三步2 H4 ]$ K1 C- j0 l3 L2 [
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Weight 1:  1-6> 7-12( W' q0 {; T2 {: l  P3 b( D

# I  d1 q/ {' O+ z5 K. `. iWeight 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