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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6 ^. o2 G* X- C+ U9 B『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)。  r' R6 S# S/ J9 n
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？』' ]$ j: g9 A) [, R' e

2 g9 q8 f" j# I注意:
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- L0 h6 c* [0 [+ D9 k, p0 B+ e6 s1. 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9 ^  k$ G. G4 P0 g. |% 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  , hide 字要連埋 , 內容 = 答案
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5 C7 K; D$ A) S3 N) @9 s8 f8 a[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
5 ~2 ^/ H$ E; _* n/ W# Y. T( R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,) A" [% h5 n! L
等我搵下仲在吾在: i! k: o2 @$ S2 q

  h# b: X% t- ~2 a* {* z0 T! Y當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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," }  s5 e+ @* D9 F2 T5 j0 ^
等我搵下...

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# e& W/ G2 \) E- s, f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:! O" _9 f5 v1 w2 s) e/ c) O
唔識隱藏...已經諗到..

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sor !!!....e加改左! _4 |! l# o. b6 Z+ v
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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:
8 z+ m% i9 \: L! e, K: S8 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.
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1 S$ j) ~- B3 V! I9 SThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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: q3 c6 W- @8 t  `# [5 TPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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  R" D+ v* O; T$ XThanks

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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

1.
9 H1 t+ }  X% ?3 s8 f7 x, W1-6 vs 7-12- N7 }6 O4 r" T0 ?, ]6 i4 B5 l
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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9 p$ k# |! Z( u! {Suppose 1-6> 7-12
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' j3 A$ A* s9 E/ e' i# Q0 q1-3 vs 4-6
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Then Weight the Third
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4 c$ Q* l9 K3 I/ q; H4 _8 OSuppose 4-6 > 1-3  o; W+ W7 n. t

! o( V9 P% m- Z$ @. W! dJust like the first Step8 P& r6 h) Y1 y9 m
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4 vs 5 # F$ s/ t! t2 T
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if 4=5 6 is the fake one 7 a: H+ _/ r# c2 B
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if 4>5  4 is the fake one 6 r+ n2 \5 T6 @6 A4 _! c/ z' Y
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,47 ~2 j3 d/ l% v+ I8 U8 ~) Z& C
Group B: 5,6,7,84 {! t7 T+ z; L1 _: ?: ]% t6 l: @# r) g
Group C: 9,10,11,12
- R; |) H5 L( H4 q/ DGroup D: 13, o1 U5 N* q, E  y7 E

! W7 w" U+ L5 ?, r4 d, h: YRound 1
  f" v1 U& U# `$ v8 lGroup A vs Group B
+ x* t4 j. z7 M4 y. M' v如A and B一樣, 即較輕一粒在Group C or D# q6 W1 g/ e' J9 L7 W1 J% O( G$ G% t* _

) i, k; J! j+ ZRound 2: _1 N2 e5 B: o2 S6 H
再在Group C拆成:
1 G3 ^" Y( w3 n, K/ yGroup Ca: 9,10/ {7 h) a/ `+ @$ e1 |2 D; c
Group Cb: 11,12  e# t7 [" ]! x3 ]9 z' B
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, + S# {* B& D( d$ x& E
要再秤, Round 3, 之後便知答案.
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3 r; g; m+ G7 t$ ]7 Y( h) \e.g. #1 假設10為較輕的一粒; }: s( |6 T% T; T$ M# v
Round 1
8 N  j0 k& l, M7 d1,2,3,4 vs 5,6,7,8 = equal: j. k/ r  G7 W
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Round 28 S& Q( v$ G' Z( X
9,10 vs 11,12 = 9,10 < 11,12
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: d% R5 Z. z  d. W6 g7 k" V( JRound 3
* j/ q9 B: Z% T; q: g9 vs 10 = 9 > 10
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The answer is 10.
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0 q- o( |9 m$ T0 de.g. #2 假設7為較輕的一粒9 g& @( G( h% M. z$ `
Round 15 x: ~5 O. N+ E2 N
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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- }' O' y  R$ _% V% h& h1 W+ n0 Q- \Round 2/ c# G* N. h+ A6 D# k
5,6 vs 7,8 = 5,6 > 7,8
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Round 35 D8 I$ Q2 w6 p" y8 Z  W8 B, n
7 vs 8 = 7 < 8  ^2 T( N1 O7 \& {

/ w; A3 j" _! i$ P, i7 ?. ^The answer is 7.
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e.g. #3 假設13為較輕的一粒
0 ]# v% ^5 b7 i* {( Y) W. }  r- e1 r( wRound 1
! n4 c4 T" C- ?  ]- i# d1,2,3,4 vs 5,6,7,8 = equal
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9 K. I. _, o& z5 N1 T6 lRound 2& ~+ \  a, Y+ r# w8 V$ P  f
9,10 vs 11,12 = equal" E7 S$ g) u' \- g' q

; B: G& @+ [% |2 \  p. mNo Round 3% g9 y3 z7 r7 Z$ j
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The answer is 13./ ^. }9 k; x; k) H# H
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唔知我答得正唔正確呢?! % j! a; ]9 ]' r) ^8 ]7 e! `: U
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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:2 k5 }7 b. z0 Q1 W  ?0 N
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1-6 vs 7-12( M. i3 w% m$ i3 K; S8 z
if 1-6 = 7-12     13 is fake1 w* Z8 F5 O8 o8 G1 I5 m

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Weight the 2 time , U; h* [7 e; C# O5 Y

  d1 G% y9 _# `1 Z0 H; T, ]4 Q6 nSuppose 1-6> 7-12
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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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7 i$ A2 J+ |+ DJust like the first Step, r7 a$ f4 w1 ]& b) Z7 n; x8 w
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4 vs 5
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if 4=5 6 is the fake one , m7 X$ L/ v' b0 U# F

' n) |, T. n$ S0 @  k9 [; d; B! Oif 4>5  4 is the fake one
" `7 _; ~8 h! y" U2 ^and so on......................

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5 \3 J, W  g! w問題第二步9 t4 m3 n  f& C1 S( E$ e6 Z

2 ~+ `) y1 l4 Y! {# d4 I8 r1 HWeight 1:  1-6> 7-12- W& R# d5 R/ j& E' a
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-68 x+ A9 E) \7 ?; d# t6 C
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你第三步点去搵 7-12 边一粒???
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# j, k. R( m- A! O; z/ l. l0 Z========================================
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問題第三步* v; T+ ]) b6 f' y# _6 A. Z  p
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Weight 1:  1-6> 7-121 H& k; d8 H1 Q
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Weight 2:  4-6 > 1-3
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+ X. i* a6 o+ A2 l$ _  R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