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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『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 z4 O, N  W9 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？』: v. Y7 l  D% x8 C, @8 E; ?& F
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注意: 4 P) A, }1 G. B$ ?6 t8 u* g

. \3 |/ I* Y5 i1. 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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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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3 d# z+ A& ]5 r! p[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
- Q( I" n& V* x/ S1 _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,$ R) E. v/ Q5 g, g8 k, F
等我搵下仲在吾在& U& X( ^; ^# p9 B
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當日用左37分鐘答１２粒波子，差７分鐘才合格。! C+ s7 d% G) i4 \, A6 J
13.........% ^6 P0 e% r7 i) s2 G1 x6 W; u
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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:0 X  F% C+ P( H8 _5 T3 l
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我以前畫左個chart去答,
" s; _# Z/ c2 I. z" C* W3 l) g- B; T; O8 l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:
7 W+ x; h3 Y9 u4 o唔識隱藏...已經諗到..

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sor !!!....e加改左3 n- U$ p( }* j+ v) a
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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:, N* v1 A$ O. r+ @' N+ g: n
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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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, }( u# P* s( _8 FPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) d1 O5 i- J; [" X! l0 \Thanks

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* T; S* u  m, |; F1 q# C不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
9 Z$ f8 H9 \5 \) [% O1-6 vs 7-12
$ u2 I& M, F4 J! Q0 Vif 1-6 = 7-12     13 is fake/ _8 {" Q' [  n$ N
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if not 4 k9 \; ~1 u" Z5 b

) H! q5 ?  n% d1 \! A( YWeight the 2 time
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6 H$ d- |; F4 ~3 \- g3 v- n0 @Suppose 1-6> 7-12* Y5 L, G2 i: J' }' J

0 |4 a9 l; H+ ]+ v2 u6 Z1-3 vs 4-6
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+ U, }; g$ X+ K# T0 t* xThen Weight the Third
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) Y$ z# G( _; `1 C, W" tSuppose 4-6 > 1-3. C4 Y9 B' N$ u- `+ p

: e7 F5 k$ w% A3 k4 i- IJust like the first Step# q: B3 N) @% U) U$ j
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4 vs 5 3 w( ^4 T1 z2 T4 K
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if 4=5 6 is the fake one ; y! L2 y) {8 N8 K

1 V8 n; n, |" W$ Bif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤! I% s+ O5 I0 |

9 j6 j  U& `: N. z2 v8 ^Group A: 1,2,3,44 ?) u/ V; k& P" A0 j
Group B: 5,6,7,8
6 y7 R7 \' R! KGroup C: 9,10,11,12
1 Y) `1 k3 C& n; WGroup D: 13
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Round 1
( e& S: l6 o  H) c. I; T0 x& a3 KGroup A vs Group B6 M; W" J, E9 f8 k- B
如A and B一樣, 即較輕一粒在Group C or D) X3 l. O# f  t2 ]9 N
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Round 2
$ N4 }+ i( m* }3 I4 I" {1 g) ~再在Group C拆成:: v) N9 [% V3 |2 [* E
Group Ca: 9,10
  T' h$ F3 ]3 m$ Z9 pGroup Cb: 11,12  k1 V3 h1 R" d' }/ [9 h* c
然後再秤, 如一樣, 即13為較輕一粒.
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6 m' g; E" j$ B/ ?7 I% E& e如不同, 即較輕一組有一粒較輕波子在其中, & @; x; _6 N1 c6 ?: X& @* t
要再秤, Round 3, 之後便知答案.
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# Q( R+ ]% i0 o8 _/ |e.g. #1 假設10為較輕的一粒& g% x' V) d' ~$ G# x  V* _
Round 1
1 P; r1 k0 \. o$ X/ \0 k1,2,3,4 vs 5,6,7,8 = equal
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# q+ R' g( P, B+ i( {5 gRound 2
" U0 }0 D  m( l# Y5 _6 d; Q2 U% r9,10 vs 11,12 = 9,10 < 11,12
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, L5 f2 ~& B3 `( T: XRound 3
+ N2 G0 R6 `& V+ P- J9 vs 10 = 9 > 108 a1 {9 x6 Y9 }- i8 J) S

% O, i; d, E" UThe answer is 10.
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e.g. #2 假設7為較輕的一粒1 Q2 C5 z2 N' h7 Z! b
Round 1
2 F: B7 h% B' |1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8' t# F- R$ G1 s( I9 P
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Round 2
1 a1 a7 }2 ~8 N2 ?- ^' }! e5,6 vs 7,8 = 5,6 > 7,88 u7 H, S) j8 S

  D/ s7 ]) |7 U* X: MRound 3
0 [8 i+ p/ Y3 _( V/ E7 vs 8 = 7 < 8
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) _2 r# z' Q( f9 dThe answer is 7.
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' x' S# g. L# @5 }4 Ve.g. #3 假設13為較輕的一粒
# U& B& z8 {* _: CRound 1
+ D; G& H1 h  w! U, W, K! `1,2,3,4 vs 5,6,7,8 = equal
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+ T$ X% o  J) IRound 2
6 Y8 {7 ~# X6 z  z9,10 vs 11,12 = equal
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No Round 3. d6 W( C4 G4 L, d- y$ g

1 G3 \: d+ o) d& [The answer is 13.. P, A* U) i+ Y; U$ v5 t
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唔知我答得正唔正確呢?!
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+ t8 t- [, Q3 t) p: T# b[ 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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" ]8 k6 l; y4 \! {0 L  @1-6 vs 7-12# j) [4 ]6 B! b7 t( f  P5 J
if 1-6 = 7-12     13 is fake0 n& m9 A" l8 u# R" f* t! o) o: S

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3 f) ~' U4 [2 K1 H' ~1 bWeight the 2 time $ e7 q% p0 F8 y( [0 {

5 [' A3 l  N# B) Z$ eSuppose 1-6> 7-12
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, O) j+ }/ A# ]* O5 q, I$ Y1-3 vs 4-6
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Then Weight the Third
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; G  V- ^" E3 B9 [Suppose 4-6 > 1-3; R$ I) h4 h' V9 r4 B6 O3 |

& k7 d( g+ I* A0 {% E, R* B. B5 [+ ^Just like the first Step; s/ i4 {2 q4 S
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4 vs 5 5 E# G4 g7 u% [2 q5 ^8 t8 M3 E
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
  F2 e: h2 w- [9 T+ Q( Kand so on......................

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問題第二步" L- H% q3 A4 a9 z& r7 {' k( L

" D( Q5 P) F8 s: H$ `! qWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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: m: p8 [2 c, }8 h) s6 X你第三步点去搵 7-12 边一粒???7 {' W& i4 ]+ q

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問題第三步$ A! {1 J9 h7 {8 o6 T

1 G! L! S( V. J5 T" }Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 & F1 P- t: N6 f/ F, v+ T6 _

5 Y6 L8 L4 \9 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