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; I3 K, ?4 f5 K1 i  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)。
" X6 J$ m1 f' B. G3 ?6 U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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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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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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0 y; O9 w: t  b4 k7 y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ a: D, f( p, X3 |9 K  P7 n
相信e條題目都有吾少人玩...

: {( ?0 j% J+ }8 Z* x2 P我以前畫左個chart去答,! U  r( H5 X% K/ p8 A
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。  M2 i$ t4 o, l  k
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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- D, h& A  G2 e$ d* b我以前畫左個chart去答,$ Y2 a' K# C5 o) a
等我搵下...

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: n, }9 j. Y, ]$ ~" O' ^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:; ~3 b2 ]: W7 O% H
唔識隱藏...已經諗到..

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" R# y: T. U8 T1 F1 csor !!!....e加改左
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* i+ k9 ^. s0 r/ ?1 X& ]9 ~# Z3 @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# c2 `0 E* {3 |, O# F

# {4 s9 R# J1 r4 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:
. x, o& g6 N2 V  b7 ]( ]+ C2 J6 L4 s. s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:1 Q- r! b7 d4 k1 j

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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

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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.& {5 Q: q7 ]' }1 v2 }+ J
1-6 vs 7-12
% n$ i1 M6 F+ [" [! G7 |if 1-6 = 7-12     13 is fake
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8 b( v; N9 ?3 p+ C2 [if not
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# b$ I4 d; [9 E8 q5 aWeight the 2 time , j8 V7 F' B" r$ [+ I: H

# d: t: Q* d8 n/ RSuppose 1-6> 7-12
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: E  P9 M' x/ Z1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3  p4 c) Q$ b7 I& t) K  Y7 Z
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Just like the first Step0 D# H  f8 w- o  t

9 s. Q6 S! P. G8 H  N+ W6 w4 vs 5
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if 4=5 6 is the fake one $ S  b& f3 \$ _1 [  z

0 O, J* o, C* Y5 J, d7 ]. Hif 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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Group A: 1,2,3,4
1 `  V& |8 u$ o$ O! sGroup B: 5,6,7,8
: P! Q# t& F" gGroup C: 9,10,11,12
) C: P' X$ N- N* u+ t( X& uGroup D: 13
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9 o' F0 X+ }  I! i( J& MRound 1
, _! e% T1 ]- y  z: \2 BGroup A vs Group B9 I* w! _" i- m+ u5 q3 q* s  X
如A and B一樣, 即較輕一粒在Group C or D
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2 P& k& U% o% U; f( N3 nRound 2
) O3 c1 n' I% k, ^- E再在Group C拆成:
/ c! J. k8 t( M9 Z7 D& VGroup Ca: 9,10
& {* x) U& M1 TGroup Cb: 11,12$ z* s9 _. F5 z- k7 K
然後再秤, 如一樣, 即13為較輕一粒.6 _+ N8 X; n! E. S* @2 j; ?
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如不同, 即較輕一組有一粒較輕波子在其中, ' r& }& _7 w4 L3 m* I
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒1 @% D) F/ K( H& O3 |) F! `
Round 1
2 A5 q8 u0 h; `' y8 m" e& S$ i5 C' o1,2,3,4 vs 5,6,7,8 = equal
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% ?) E7 \; ?0 H+ NRound 2
+ z9 k6 \: t; d0 W! Z6 D9,10 vs 11,12 = 9,10 < 11,12
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Round 3. e: V' f; Z& ?# P+ f- v
9 vs 10 = 9 > 10! ~& w- n1 c$ Z$ K
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The answer is 10.0 K3 y3 i* O& X8 z4 ^% H

' J) I, T' i7 Qe.g. #2 假設7為較輕的一粒- I, y; ~+ @% M( }0 h8 n) a0 y0 M
Round 1
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- n! N- I( x5 }" o. BRound 2( }: r: N; L2 ]. ^
5,6 vs 7,8 = 5,6 > 7,8
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7 vs 8 = 7 < 8! b( z6 U# q1 a8 @' k

( G+ y4 p1 N9 P% ?8 k" PThe answer is 7.
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4 s6 j! R- \! ^: I( v" t. D. E- Je.g. #3 假設13為較輕的一粒: E* W9 _+ C# _& P
Round 1
6 |* m! V( _. b1,2,3,4 vs 5,6,7,8 = equal# z& O  O: c4 P

7 V/ h) v5 d+ V2 U9 e, QRound 27 a# W3 x5 y( {/ T
9,10 vs 11,12 = equal
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- v5 `! {# y. w+ M; u3 @0 M. U) iNo Round 3" x% B: C7 W+ V& w
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The answer is 13.
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唔知我答得正唔正確呢?! 7 d; q0 @# }2 ]2 ?4 v. c

- q* H& c, s- E# z: T[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:3 b% Y# s$ z3 p* P
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1-6 vs 7-12) o& V1 I5 i4 k, X1 x, E8 @
if 1-6 = 7-12     13 is fake' R, f( t  d% r+ T9 V9 M

' r5 [8 T& x( jif not 5 S7 G& S& S, ^* y: l: o/ S8 l- X, F

5 x3 b4 D4 K. U0 _, X. KWeight the 2 time
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Suppose 1-6> 7-12+ O3 E; ^2 N8 J& [$ F
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1-3 vs 4-6
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  y8 @, Q! y) }) G& A9 TThen Weight the Third+ f4 t, ~- q  X0 ]0 }( r2 I
3.0 ]* o3 L  W) V0 l* |1 H( X3 e

2 w7 G5 ]( s. C& h- bSuppose 4-6 > 1-34 s% O$ C, _3 \0 I, v% I9 l0 I
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Just like the first Step
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) G# l1 X/ N8 \4 vs 5 4 K# o+ S( v  r/ }4 ?4 M
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if 4=5 6 is the fake one
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, ]" V- V2 Z7 u9 h2 Gif 4>5  4 is the fake one
- X, n& e0 @0 cand so on......................

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6 k1 N3 w5 s- d1 w; }  F9 g  ~, _問題第二步- Z+ m; ]4 f/ v: p+ p$ X2 M  @

/ F% {# U+ n/ P$ {Weight 1:  1-6> 7-128 v1 `: @/ N. h2 M% o
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6  A5 m1 O- p* n; l) s6 ]: U# f

# t& g/ Z7 W/ J( z你第三步点去搵 7-12 边一粒???
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$ K# b; A& D+ }8 W/ A========================================, |, n- ~/ I: C. s. P8 |# G
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問題第三步
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1 X: L3 T9 c- h7 xWeight 1:  1-6> 7-12
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6 v3 g  E! F( S* z( dWeight 2:  4-6 > 1-3
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" N3 Y: d" b& q, t/ [2 v4 f" w% o7 f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