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)。
3 l* F: p- p/ u# Q! I. o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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* D5 j/ v' x+ r3 }1 t8 Q) o2 f注意: . Q% w3 K" |) ]5 R7 ^' g' |

$ }( ^5 v5 k7 ^) @3 `4 g! D- Q. W1. 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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- m* [) u/ C" T' x/ g1 u2. 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5 j- r& M1 r4 c4 y( n, B8 ?/ D3 y" a
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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:: k+ K5 x9 W+ l  ~+ ?5 Y
相信e條題目都有吾少人玩...

3 U& W* H. j8 x( g, O我以前畫左個chart去答,
: B; b+ i- g) ]% ]9 t等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ v/ k3 o5 s; t, r13.........
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  `' f% [' Q1 j[ 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+ ?  _9 j" g( B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:5 F- [% @9 Q1 V% [2 S% e
唔識隱藏...已經諗到..

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sor !!!....e加改左, ?0 e& l& ~& W1 g" c2 D8 W

. a* F, P3 L+ X6 i; J! B2. 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:
/ I* P$ C: Z; Z0 _$ G4 \相信e條題目都有吾少人玩...

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; C* `' G* T3 CPlayPlay, Let me know later who has the right answer and I will add points accordingly., X& R2 b* f6 \3 `; q  {. F

% ^, r  ]2 j; y- F3 TThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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; v; H1 W0 A9 `, u# ^( t' w& RPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 k: r$ i3 r- U# ~; B

0 \- t5 r- M: X% f- KThanks

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2 t7 N2 B  `, e. `+ R" a' i不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
5 n" B  Q- L6 c1-6 vs 7-125 b1 \  Y4 k2 c
if 1-6 = 7-12     13 is fake
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% c+ }! I  b# F0 D9 \if not
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4 z; o; o9 \( W. C  c& ?  tWeight the 2 time
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  V* g  J1 L) n9 M9 H# ASuppose 1-6> 7-12) [& G$ l$ W- n

9 Z5 }1 F3 R; L5 _: I1-3 vs 4-6
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$ x- |  G4 |' T9 y4 p  `# AThen Weight the Third
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Suppose 4-6 > 1-3, ]. A* H! F7 N! \/ c
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Just like the first Step' _( `4 Z/ T4 f% g, z8 h5 l! J# ?
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4 vs 5 ; o! I8 p* ^- J6 J- n  S+ L

1 Y8 o3 c) W) J* Q) bif 4=5 6 is the fake one
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3 D1 o+ F$ v, U/ n8 Y0 d" qif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤- ^/ C" N- o+ u

9 ^7 Y4 |4 \* O5 Y, x  q6 xGroup A: 1,2,3,4% f% n4 S; T3 u+ P/ u1 f, x
Group B: 5,6,7,8
9 `" d6 g) ?; @  C8 QGroup C: 9,10,11,12  O' a& p8 A1 _* C5 z
Group D: 131 K4 A, p8 ^' Y' O2 p2 N
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Round 1
" n, e: B" d4 H" `# kGroup A vs Group B" G! h2 c) }9 c& Q% _* Z1 t
如A and B一樣, 即較輕一粒在Group C or D
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' N, B: B7 _9 m6 ]% h$ F; ?Round 25 o6 ^) d2 G4 v
再在Group C拆成:
- g" K8 m. {+ F. ~Group Ca: 9,10
5 ~5 }, Z" F. Y5 J. K& ^5 j) ZGroup Cb: 11,121 n! [" V" M( A% c+ k2 B0 ]
然後再秤, 如一樣, 即13為較輕一粒.0 I8 @% M' c+ o( y( o/ R
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如不同, 即較輕一組有一粒較輕波子在其中, 2 R+ b% g: ?8 n+ p# t, B
要再秤, Round 3, 之後便知答案.+ t+ i5 I) z! t5 b7 _7 H. o2 v, W

0 c$ k4 q, ]3 p; I7 Oe.g. #1 假設10為較輕的一粒3 n) K4 n, }  Y+ Q5 @0 Q! c$ L
Round 1
9 v" G9 K2 H& Y* |1 [1,2,3,4 vs 5,6,7,8 = equal
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Round 2
# T; h% H; Z# Y: m1 J" }. V  x& C9,10 vs 11,12 = 9,10 < 11,12
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5 \: z9 M. h+ i3 iRound 3
7 q6 N/ ]$ W' t4 s; u: P) F  y# j% f1 {7 W9 vs 10 = 9 > 10+ m/ h! q, J) K* l/ h; ]2 ~8 v
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The answer is 10.: |5 F/ w' }; _: b- `

/ I( U: m$ Q/ O: ie.g. #2 假設7為較輕的一粒
' d" Q4 }# Z2 hRound 1
# P% d: D7 N/ C9 \1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2# y8 m0 Q; c4 I
5,6 vs 7,8 = 5,6 > 7,8
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6 q# o4 u7 i/ B  _% iRound 3. f3 Q: ?/ i) v
7 vs 8 = 7 < 8
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1 S( r# A1 s/ E7 [The answer is 7.
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" j) r' e8 [# w/ g! _* ^3 Z. ?e.g. #3 假設13為較輕的一粒
8 D: `, k8 Q7 a* V+ X# |Round 1; n0 Q; x+ S# O5 E9 ~  N/ q
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
! y/ W9 Y4 B, w5 V  f) ^! D9,10 vs 11,12 = equal
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No Round 3
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8 L  v! I! S# I8 K5 I; \The answer is 13.
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7 f% @) C0 |+ `0 `) r唔知我答得正唔正確呢?!
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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:9 a* d* i1 B8 c! b7 m# W; y' D
1.
$ W! e0 {" a6 Q: m. V$ ^( V" Q1-6 vs 7-12
6 s6 m( d: k: ]  Gif 1-6 = 7-12     13 is fake# N- l9 m$ C& Z% @# \  W2 S- B+ z
+ [. Z2 [% f* Z% {8 v
if not
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& u$ f  t' ]* ?Weight the 2 time 9 D3 K8 J! ], ]( G# A1 M
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Suppose 1-6> 7-12" u6 T: r  x- f( h
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1-3 vs 4-6
, W1 M! i3 u' y) w: a2 Q+ ]) w* h
% w  Y) d; D" Q* Q  N9 S3 K* W8 f: vThen Weight the Third
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5 Z3 v; N$ ], G6 O9 A6 D# l) YSuppose 4-6 > 1-3
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; A& N4 H, L% g$ w2 u$ e( k0 gJust like the first Step
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4 vs 5
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) s+ ^( w1 y4 u/ f! L  oif 4=5 6 is the fake one
+ ?  h/ L' s8 \/ o# G; g: P- ]8 d6 u$ @+ [4 k- i
if 4>5  4 is the fake one % Z& n$ g5 k8 J: Z( I
and so on......................

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; |! B8 x/ y5 T問題第二步! q# W  D0 ~8 }( b
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Weight 1:  1-6> 7-12
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% p' M2 w3 x$ A. v8 |Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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. E0 c3 Q/ w7 J, J& d: u! m你第三步点去搵 7-12 边一粒???: W" F- S. ~- L. i- c

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6 _: A  O6 G4 D% c" O' B問題第三步# {% ~6 O+ ?& W$ O/ S8 F1 I  E2 X

0 x2 x$ l) n: j1 ^0 kWeight 1:  1-6> 7-12, e9 O9 T( f, ~- F5 T% W

$ T, R  c; ^) |5 H* `5 uWeight 2:  4-6 > 1-3
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# Q2 Q6 F( ]5 @" ^9 }% \# R3 M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