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; O1 X, T/ W; x+ {7 u
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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)。
# n5 o0 A' ], F8 `4 J7 T4 z: i" w* f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？』) L+ g' b" H4 n- G/ V( t) Y

+ i7 s- n( U! }! A% ]( p- o% c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
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% w% ?, T* e& m# ?# w2. 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:( G: E) O: b3 X) {
相信e條題目都有吾少人玩...

( B: _0 `/ Z( M- b" X我以前畫左個chart去答,
  Q. K0 y: Q' ~' S& v等我搵下仲在吾在
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; o; g4 y! c5 W; P& {) m- z- U5 K. H6 E當日用左37分鐘答１２粒波子，差７分鐘才合格。" b9 v& [4 E3 }" {
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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2 W7 ?/ p4 A4 t: y! M我以前畫左個chart去答,
! V6 H! b; R4 r5 _+ M8 q4 J等我搵下...

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: t+ t) |5 u+ W7 m, }5 g$ x1 x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:
# Y9 _) v7 ?( g/ }# D3 }唔識隱藏...已經諗到..

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: b; d* D7 }3 ssor !!!....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0 t& J. X  i! z
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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:1 p3 b$ G( t; X) x  [
相信e條題目都有吾少人玩...

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# n6 d* }$ {/ b2 R2 RPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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# M6 z  }3 c; U' ePlayPlay, Let me know later who has the right answer and I will add points accordingly.8 z/ o$ A: `# y* m; U' ]
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Thanks

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& u5 Y# C. s! Z不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
, f' u/ s" s* S+ M8 j1-6 vs 7-12% @8 q/ ^; A' b% k6 H2 x
if 1-6 = 7-12     13 is fake0 o/ G1 Q0 i) W! z5 X* r
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if not
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Weight the 2 time
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# G2 [$ ]" L) t7 ESuppose 1-6> 7-12
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1-3 vs 4-6 2 \$ H6 ?9 ^7 `8 K7 Y/ L9 P) x
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Then Weight the Third
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4 A3 n% w! C9 X1 T6 XSuppose 4-6 > 1-3
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/ z0 w7 d& e+ T. g; o4 fJust like the first Step0 L" V' K/ v$ k8 ]9 B0 e0 _
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4 vs 5
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1 O& F! w! l  X& Zif 4=5 6 is the fake one $ v( J' m$ w0 X
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if 4>5  4 is the fake one
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: U; ]) N0 I; }8 O# H' x$ a8 Mand so on......................

hello1997

分3組4隻波子秤
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" }3 c! x: ~0 C0 `( vGroup A: 1,2,3,49 u% v2 ^8 f1 X1 w: [# v, h! s
Group B: 5,6,7,8
8 y- ?4 c2 X7 OGroup C: 9,10,11,129 O9 ^' [$ D' I
Group D: 13
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6 a1 y2 `# }1 y: E/ zRound 14 ?. r( Y/ h0 R8 L! g' }5 s( I
Group A vs Group B
6 a! {. j/ U) h5 y& ?  a5 t# h如A and B一樣, 即較輕一粒在Group C or D- I" ^0 ]! m' {# }: w' f  m

1 H1 \+ Y9 {7 x: b0 w, C- HRound 2
- b  F2 Z  E' v9 o7 `9 e再在Group C拆成:/ T. }  _  P3 ]- Z7 {& D5 |+ m
Group Ca: 9,10$ P' J7 ?) q& x6 F6 M' `! n! F. [
Group Cb: 11,12$ ]/ q" R* {" j/ u+ f- c
然後再秤, 如一樣, 即13為較輕一粒.
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& U' E1 r1 F: P# P% A  t+ f4 L( t如不同, 即較輕一組有一粒較輕波子在其中,
# C, C- B# B' x% f要再秤, Round 3, 之後便知答案.
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/ }2 q! {: l1 g9 C: A5 Ke.g. #1 假設10為較輕的一粒7 r( U$ z3 g/ M6 `. y
Round 1
1 m# k) X  L% h# o1,2,3,4 vs 5,6,7,8 = equal1 ~- O7 P' M3 S- v
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Round 2
- v! y: I) \8 H2 p# [9,10 vs 11,12 = 9,10 < 11,12% P3 w: N& L5 I  W0 n

$ ]' c8 u. e0 A) n8 t1 E+ aRound 3
6 ^  M" \& x: X* q9 ^( u9 vs 10 = 9 > 10
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2 a6 J  Y' [5 p) ]0 r9 C, oThe answer is 10.
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e.g. #2 假設7為較輕的一粒
, P/ @$ ]4 m: G0 Q8 v) fRound 1
. q" g5 O+ T& t5 e  `4 {6 {1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
3 `8 r2 q) L% K7 k) X5,6 vs 7,8 = 5,6 > 7,84 v* m+ w- |6 F' o& x% l/ P4 Z

( F: g7 z9 O1 H! i9 `/ hRound 3- U- K+ g8 U( g) G7 m) ?) a% w, e
7 vs 8 = 7 < 8
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The answer is 7.3 E/ w6 h) `! R" f
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e.g. #3 假設13為較輕的一粒( Y2 U' S( a4 S6 M5 D! u
Round 1" y% H8 G& p; O6 Q
1,2,3,4 vs 5,6,7,8 = equal0 F2 a, p3 F* }
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Round 2
% y) T- M3 p7 U4 z+ l; x5 @; q9,10 vs 11,12 = equal& [% ?* T; q+ q6 V  @$ ], S
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No Round 3
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, g8 f1 {$ I' ?7 \The answer is 13.
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( f7 I6 S% N; `4 H. B, w+ F唔知我答得正唔正確呢?! , b. \' d! u- ?  s$ l  x  V
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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:" b+ d% |' J& G! _
1.
- ~$ _0 n* ?  a- G- p0 H1-6 vs 7-12- B$ C7 R1 I% c2 Y7 i
if 1-6 = 7-12     13 is fake
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( n+ |% f# P7 x* p5 x2 O, f! L+ G! hif not
7 |  P; a% }8 M/ @$ i, v; k9 {$ ^) ^
( n1 b) g9 W) L; F; E, KWeight the 2 time 8 i' W4 T( B' ^" \3 z. K" `
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Suppose 1-6> 7-12
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$ {: t( K: b; s+ P; `% K. B) H1-3 vs 4-6
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" G8 K1 j6 T6 e9 K4 q: [7 C' F, _Then Weight the Third
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Suppose 4-6 > 1-3- b" @* J; J$ M0 Q0 \! ]. i( p

/ o" m0 C' f4 J$ {Just like the first Step
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4 vs 5 # b3 g0 F+ ^' f: a1 V

6 D( J% U& ^6 A  F/ n; c, Cif 4=5 6 is the fake one
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if 4>5  4 is the fake one
+ e, V" w, Z8 E9 x+ z& xand so on......................

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/ h7 \8 _7 y7 G' Y/ r問題第二步
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Weight 1:  1-6> 7-12, g0 ^5 \7 F0 f7 F6 I( F
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-69 V1 E5 d- x  x/ ~7 H; G; \
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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
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 6 }) I: e6 q/ ^0 d" n' A

- R. z% S4 G8 }/ b! I1 `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