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4 N2 @/ Z; I- K

/ E2 n  B6 ]# E$ T' Y; m  L0 ~7 E『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)。
5 X5 s* G7 k/ `; t) S8 l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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1 U  z9 V; M+ t# M1 a3 D: e注意: 3 o) `' y) j& Q% u
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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) f6 I/ h8 T" e: i' 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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" n1 s1 n$ y0 N[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
9 Q9 K( z7 v* H9 Z4 u; ~9 M) m相信e條題目都有吾少人玩...

( I+ R- a+ p4 b3 _* `我以前畫左個chart去答,
% {" g) B/ d/ Y- z6 R3 p" J6 N* H等我搵下仲在吾在
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2 m1 B. b) M9 C: X9 |! r' y當日用左37分鐘答１２粒波子，差７分鐘才合格。- r$ Y9 R+ Z: R
13........./ a+ X" p8 c2 l8 w) l
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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,
  y1 ]$ D2 m; `/ s" P$ t等我搵下...

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# E# i/ S& I4 [3 ]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:
$ t2 b  p9 L  u5 q2 r唔識隱藏...已經諗到..

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) t- G8 v3 E( B3 x$ P# B# ssor !!!....e加改左" ], g, Q- F2 e& c' \6 l
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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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9 @7 z( e$ |; {3 a[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:6 N  M5 u4 ~& W5 t" E; ?" Q. 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." z( ~0 d5 V" d' ~

, s/ i' L' _" p: q5 |Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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4 G  Q: d* c& {0 M, u9 rPlayPlay, Let me know later who has the right answer and I will add points accordingly.0 e% p$ |" a# P% m# ]8 R

2 z! J3 T. H4 e0 ~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 7-121 e* w: B6 y  a
if 1-6 = 7-12     13 is fake1 m8 p9 k" X& B" `: e9 A8 P" R0 a
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if not
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9 W4 w8 X3 `* @* OWeight the 2 time * N5 ]' d- f+ h% N+ J
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Suppose 1-6> 7-125 N! e( s0 u  G, B5 D- E  j/ h3 X
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1-3 vs 4-6
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4 c) |; h. }2 a1 j& oThen Weight the Third( _& x1 ^& M/ I
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Suppose 4-6 > 1-3
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Just like the first Step, S- @2 |; q" X; u2 t# N
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4 vs 5
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if 4=5 6 is the fake one ; r+ i! _: A- f
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if 4>5  4 is the fake one
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: U' G. `% i' [5 m# y$ M* Land so on......................

hello1997

分3組4隻波子秤
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7 H- k( p2 N& IGroup A: 1,2,3,4
6 ~) t2 G9 X9 m3 q* YGroup B: 5,6,7,8- @% [+ j* }% B" ?. n
Group C: 9,10,11,12: S3 Y- H' j+ X2 B* H  G
Group D: 13
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, w5 Z0 |3 ?) U+ _Round 1
4 B/ M/ \; m; {Group A vs Group B
5 {8 V3 V/ E# E  a如A and B一樣, 即較輕一粒在Group C or D
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Round 25 b; p$ S% s" N( U* c
再在Group C拆成:: ^2 L1 h1 G+ O9 H. Z9 B
Group Ca: 9,10+ @* i- O0 R9 `7 P
Group Cb: 11,12! D2 L: A+ m8 A1 {
然後再秤, 如一樣, 即13為較輕一粒.
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  e! W2 S1 x4 U0 h如不同, 即較輕一組有一粒較輕波子在其中, * m. b* S% e' c7 N
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
. T( D# h5 r1 l2 }& zRound 1
6 z: W2 `/ b3 ?  W1,2,3,4 vs 5,6,7,8 = equal- e5 l  t3 V/ e8 P( V

- V' ?- o% w# W# d% {Round 2
' o- h4 r& U0 F& r; w9,10 vs 11,12 = 9,10 < 11,120 [6 e7 D& m6 ~' Z1 x3 v) Z
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Round 3
9 H" s! @) z/ {9 vs 10 = 9 > 106 @: H" c4 F# m  X+ ]' r

- R% E/ z9 m" ~: [The answer is 10.- M" v* Q3 W0 b4 `
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e.g. #2 假設7為較輕的一粒) M) i! V. M( h$ d: `
Round 1# H1 @8 W: X$ Q0 G$ o
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, }8 v# @* k7 ~, U$ f; s7 j# n
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Round 2" v5 {- l/ L* Z6 D) x2 O1 ?) O2 j4 b9 `
5,6 vs 7,8 = 5,6 > 7,8. G( _3 S$ P# J$ y# H
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Round 33 j9 O' {9 ^7 k7 u5 S$ s5 J
7 vs 8 = 7 < 8; H( X% q3 J! |) g; h- k$ x

1 h4 }; ^- i" h- p; TThe answer is 7.
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e.g. #3 假設13為較輕的一粒( K' Y& Q$ ^/ c+ s
Round 1
5 Y3 |) ^* t+ Z( ?8 u1,2,3,4 vs 5,6,7,8 = equal
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) w6 T+ o  y2 |Round 27 }- @# u1 w* s% `7 ?
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.' }( e; z+ w! A+ ^2 z
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唔知我答得正唔正確呢?! - [: k: l* h% \  i) b7 \

, |" b# }/ ^* s* ~& `9 `( D' i+ k[ 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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6 b0 V. T# v0 }' i, C' t4 y1-6 vs 7-122 _( Z  N8 A) b
if 1-6 = 7-12     13 is fake
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, O9 D/ b- U/ \* fWeight the 2 time 2 u/ z+ U& E9 |1 W. d( _3 M

1 Z" J2 s3 S/ sSuppose 1-6> 7-12
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1-3 vs 4-6
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# b% d/ _' }  y( N$ l6 c* X; JThen Weight the Third; {% V) N* I' h
3.
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7 Y7 A; J" G8 n: rSuppose 4-6 > 1-33 Y7 k# ~( E9 l; W5 q
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Just like the first Step
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if 4=5 6 is the fake one ! B5 a# E* P5 P4 O) L5 U

0 a. o3 h) t3 c3 A1 z* x# l  hif 4>5  4 is the fake one
( j3 s2 \& V- _/ m4 h8 C) Gand so on......................

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: O" c9 m, E6 @% n. R問題第二步
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" {6 F, v5 [5 \$ G; {& z& mWeight 1:  1-6> 7-12- i( E/ V2 {. T2 O6 N8 R- S3 I

/ _, G8 c8 g9 q; m1 EWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ N( v8 h" |) J; m' l+ u- e; |% l
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你第三步点去搵 7-12 边一粒???
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問題第三步2 \: {! g: p/ g  R, H

: P$ W! t! U' G% J0 N7 |0 q* {Weight 1:  1-6> 7-12
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Weight 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