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0 g5 u9 U8 Z% l- Z' a

6 ^  L4 I8 p3 a3 t+ a7 y『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)。
' L6 ~% I0 f0 \$ r& _- M2 `) d+ C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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( m* {7 Y& r+ ?4 O' ?注意: 7 k( J4 G  c" m% M

" Q9 y: M0 p, _! |: G1. 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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" ^5 Z* ]5 I" H$ H1 r( \7 @$ i7 z2. 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:
  ~+ V2 t$ I$ N/ P( w3 \# d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,
3 H$ @% ^2 n* V/ R! H+ }: {6 F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。* P7 e) z# O$ \# b; C% U
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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0 {% P/ k1 ~# n( B我以前畫左個chart去答,
6 P) V- D4 ^# Y) z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:. p6 p1 P% q* x" F/ d8 ^4 ]
唔識隱藏...已經諗到..

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, m" a+ ]5 x- M# a5 M, m  X+ esor !!!....e加改左
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/ f6 |  `# G; P, i( R2. 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: l0 e. S" z' e3 ]$ D0 X( O

7 q; S( ^- {; ]5 x! Q8 _9 P[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
( N5 @: j( S2 x9 f) g* h4 p3 V% R; b相信e條題目都有吾少人玩...

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+ U3 B6 U* a1 [: n% KPlayPlay, Let me know later who has the right answer and I will add points accordingly.  s* X5 i+ x( u
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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1 X# C! h+ F) k" uPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 h" R. p$ ^) d% }

9 |+ M6 J2 |* M2 Q4 OThanks

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8 J) x9 f" ?/ n: e" A: v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 7-12
# g. X" O; B) P; U3 e. L( {6 q0 ?if 1-6 = 7-12     13 is fake
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- F6 I; I/ @2 H5 d7 Lif not
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/ j7 R# k2 V2 g1 ~, m- R" c7 tWeight the 2 time * b# s4 T- R) @7 C8 Y. N; A
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Suppose 1-6> 7-12
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) V' }# n# W( j! n8 n% S1-3 vs 4-6 5 b& s% P6 N, E8 U
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Then Weight the Third
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Suppose 4-6 > 1-3, O9 ?: M2 [, h# H9 V! @

0 V3 b& b9 b6 T( }' X- NJust like the first Step6 i# Y1 ]& W; c; w, V
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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2 y2 T5 Q% [0 d  g1 c7 lGroup A: 1,2,3,4% P( v, c0 w! Y3 F: \
Group B: 5,6,7,8
  t1 N6 @% E, b: f7 L+ hGroup C: 9,10,11,12
" G$ k  W( b/ b- uGroup D: 13
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0 ~# H* p5 E: ^& V" Y! iRound 1+ f6 r9 d/ e0 [* B- M; c- Y
Group A vs Group B* J1 m0 I; Y/ R7 d: T# k
如A and B一樣, 即較輕一粒在Group C or D3 y7 L2 c* V, o" Z! s4 X# i
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Round 2+ U6 g( H; O7 w# m% |4 [% p
再在Group C拆成:
# U6 v2 M& o6 F- eGroup Ca: 9,10
& ^2 R/ x! [) c1 v/ ^  mGroup Cb: 11,12% |0 b- x5 N% ~% O7 L2 ^/ D2 m- t! l
然後再秤, 如一樣, 即13為較輕一粒.( P) d4 L- g% E: K

+ k8 N9 u, n' p如不同, 即較輕一組有一粒較輕波子在其中,
* C5 L9 n# t- e4 L) r* {要再秤, Round 3, 之後便知答案.9 Q2 M* j, w% h0 H
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e.g. #1 假設10為較輕的一粒1 j  C: h, V  s
Round 1' k0 f. W5 O( ^( d- s. J
1,2,3,4 vs 5,6,7,8 = equal
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; Y5 b; ], i5 `, {$ G( u9 LRound 2( r5 K! C9 K7 W5 L3 m! n
9,10 vs 11,12 = 9,10 < 11,12% y$ @3 Y0 z# p1 [$ R5 h! l
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Round 3
2 s( _( E% y5 j9 vs 10 = 9 > 10
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  f2 P. S! e0 ~/ r1 gThe answer is 10.$ r; j/ r6 p! u  ?6 {8 c+ U. _
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e.g. #2 假設7為較輕的一粒! Y% i: T6 u# o5 e/ s
Round 1( o3 V! z1 U1 q1 ?0 q. O- d
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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0 L% @. d% [5 r# VRound 27 P) ?1 s2 u# R0 a% _$ n# j2 P$ P
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
3 `4 {0 [5 |6 }7 vs 8 = 7 < 8! Q; r3 B; l6 }) L' }
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The answer is 7.
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- K+ ]- x2 _$ m; h/ b9 ue.g. #3 假設13為較輕的一粒. v  E2 r2 V  @, r
Round 18 h4 i8 p/ G" @* S, c
1,2,3,4 vs 5,6,7,8 = equal% a" v) P. e$ R, c6 g
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Round 2* b& ?" u( S' o, Z' L5 Y; f
9,10 vs 11,12 = equal+ ?& |0 n& N- G; V& ]' \
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No Round 3+ Y% y$ ~/ f: |: d$ |/ N

% k) o4 y4 ?" B5 [0 CThe answer is 13.
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唔知我答得正唔正確呢?!
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* p: K4 z6 \4 T% S% n! V[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:  X/ {0 t3 U" i  K3 {1 M
1.
2 ?* W0 {; l0 i1-6 vs 7-12% s4 j2 v; U- s* Y5 B* Q
if 1-6 = 7-12     13 is fake
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' X7 {* D! A$ A: ?$ Qif not
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, l- y* h4 D- eWeight the 2 time ( [' l6 d! N% J* S" d" p2 O6 |+ B
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Suppose 1-6> 7-12
, \9 k7 c2 I3 e8 f$ _- I& O
. }  ^& q' d6 V: C% m) W% E' i+ p1-3 vs 4-6 7 @- Q6 h: \! F2 P
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Then Weight the Third
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3 x: t& I! q6 Y. _  I+ B# R  RSuppose 4-6 > 1-3
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Just like the first Step* @8 A& _2 A4 T' ?6 l
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4 vs 5
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if 4=5 6 is the fake one ; X7 y0 w1 P  p. E( ?9 g9 a

5 x) w1 a. _+ h2 Tif 4>5  4 is the fake one
" M/ \' i1 l2 `% R* J# xand so on......................

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問題第二步4 Y$ y6 z, N# H4 h
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Weight 1:  1-6> 7-12; N! U8 a: W" G# e8 `! h* D
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6; U1 i1 a' k4 @) j3 j& S
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你第三步点去搵 7-12 边一粒???1 y% M: a" k; O% S
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7 P0 \# W3 g: c* y問題第三步
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Weight 1:  1-6> 7-12: ?0 d  ^  ?5 J' @! r' T0 }2 t
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Weight 2:  4-6 > 1-3
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5 t9 [4 ~/ N2 @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