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) c9 X, s- T% S) E. x# ^1 Y; k

( n* f: X7 N0 Q$ T& f『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)。
% E/ Q* s3 Q) c' v1 v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？』6 \2 Z' b+ r3 a  G- W) K

' g5 `' D9 l, u. a注意:
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" l1 h+ ^5 `$ q4 h1. 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 n) f! x7 {- G; f2. 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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) m- t/ [$ [% j, R! f) ?# ^[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 C' K( C, ~' q; L. X/ @相信e條題目都有吾少人玩...

4 V: M/ r6 }/ S: z我以前畫左個chart去答," @% a% k; p& I0 @) v7 `
等我搵下仲在吾在
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$ g4 [& v: v2 i當日用左37分鐘答１２粒波子，差７分鐘才合格。
" s/ t0 _& E' t13.........
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) T$ Q4 U9 @4 ?) b  M. s[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:! Y% a# o% ?2 [, H2 ?7 v) V+ `2 V

6 w9 C- |" ~" U$ b; ^我以前畫左個chart去答,1 Y% C' Q- d* z3 d9 W
等我搵下...

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# y% ^. e$ `3 F) X2 V8 J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 X, G, ]4 I+ ?6 A唔識隱藏...已經諗到..

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sor !!!....e加改左. m( Q" m: f, @  X9 V/ L
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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+ \& w' b1 w0 N. B/ }
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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:: }( W' T6 m7 X
相信e條題目都有吾少人玩...

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8 M# |# p. Z9 H; i& n( LPlayPlay, 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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PlayPlay, Let me know later who has the right answer and I will add points accordingly.* E. p; z1 ^1 m
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Thanks

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# Q/ w, K7 I9 X不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
* |, V; E+ z* z) P5 s# v1-6 vs 7-12. z1 O: \2 G: b7 X
if 1-6 = 7-12     13 is fake/ I! D& M: y$ _6 B
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if not
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Weight the 2 time
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Suppose 1-6> 7-12
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' C6 k1 T0 e& Y7 ]) T1-3 vs 4-6 ' G0 ~# o% A* \" R3 D
7 K& M* F2 Y  r! t  {
Then Weight the Third
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3 [# x3 {4 P5 t6 k% R, x5 O5 H" h4 r6 `( P" A% w* N2 [0 J  P
Suppose 4-6 > 1-3, S( ]! h1 o7 _7 M
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Just like the first Step" F; Y  M+ G% }( J
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4 vs 5 * ?6 |$ Y$ ~* k8 `0 j) H: F
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if 4=5 6 is the fake one 1 X" N" S% g6 ?* w
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if 4>5  4 is the fake one
% U/ Z2 ?% J$ R/ L  K" P& I' v! T2 I) L
and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
' [. e! P- Q% o4 d. p0 mGroup B: 5,6,7,8- T5 U' V. @; Q# m6 f
Group C: 9,10,11,12
9 b7 t( h  Y2 r% S5 SGroup D: 13# d- Z( E; z( e$ T+ G
  _6 ~5 \2 i( Z- [5 _
Round 1
( C1 L) y! q* E3 y& ~Group A vs Group B: B! ]. }9 `& s3 z( t5 `. ~9 R
如A and B一樣, 即較輕一粒在Group C or D
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7 D9 N8 R0 o8 z) d) m4 TRound 2
6 B7 l$ F6 ]1 o, `4 l1 J再在Group C拆成:
/ R# L: K9 |- r1 EGroup Ca: 9,106 B  Y- Q; C8 d) \, ?. O1 A
Group Cb: 11,12
7 R3 ]1 m" ]" a3 W0 ^$ M然後再秤, 如一樣, 即13為較輕一粒.0 u5 i9 N+ j( B0 V- u% O

$ z/ \3 O4 M- x如不同, 即較輕一組有一粒較輕波子在其中, # q6 R1 _& _6 @) {$ |2 m6 y
要再秤, Round 3, 之後便知答案.8 b5 u: \* q6 X' T; H9 S( A
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e.g. #1 假設10為較輕的一粒/ y. R2 ~& E9 e! S! r( G% x, I1 h
Round 1
* x: J! q' a/ p3 t' t1,2,3,4 vs 5,6,7,8 = equal2 Z' Y: o% T" J5 T; H  ]3 A- u

) R  [. O' ~; I  I! ARound 2  c6 e# p" Z. w5 l3 P$ z4 E
9,10 vs 11,12 = 9,10 < 11,12
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1 Y' H1 k: m8 I( ?/ f: W$ {Round 3$ V  [* `3 n) H, I
9 vs 10 = 9 > 10
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The answer is 10.
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0 i* t, `% l' K) O" he.g. #2 假設7為較輕的一粒
/ X# f% h# b6 ~8 r$ n8 BRound 1
1 I0 `* I: }6 I# _4 I1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5 k5 A$ ]' e/ u3 b0 WRound 26 W. e% Y* V7 }% G9 q; T  t$ O% H
5,6 vs 7,8 = 5,6 > 7,8
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, j, g" u% w9 U* }  ?Round 37 B! N7 P) A, u$ E! N) l
7 vs 8 = 7 < 8
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  Y4 |) R% [, p/ VThe answer is 7.
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e.g. #3 假設13為較輕的一粒
. i& z, Y4 h- F9 y( X1 P! @Round 1
% e* V; \9 N, ~( n: Y) T  J1,2,3,4 vs 5,6,7,8 = equal
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Round 2
; K" i0 [7 m# v* \9,10 vs 11,12 = equal
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: v% `0 ^& ^. W: pNo Round 3
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' j* ?+ k. h0 c; }: UThe answer is 13.
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: a5 j' k+ q9 s2 ^唔知我答得正唔正確呢?! . ]( J# e3 h+ k: k  N$ `
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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:7 K( h" F! d- s. _% S
1.
* O& Q+ Q4 c9 V9 e# B" ~1-6 vs 7-12
" K( r. l' |/ s4 Z0 q" Jif 1-6 = 7-12     13 is fake
& j/ j9 [( m8 y# w2 m( _) J9 F1 o, G* X/ d
if not 1 g' ?# C, {+ V; N( A) |2 h

* e' _7 A3 J! w9 qWeight the 2 time - g( X# R- M, a' @$ \

) t/ l6 g( L+ r/ P1 {* M3 hSuppose 1-6> 7-12+ |/ x$ A1 N4 ]- F5 t
  @/ K9 o0 e! `! T- x
1-3 vs 4-6 ' a! K% j* r4 n

4 I+ z3 ~3 B& TThen Weight the Third/ e8 H2 g+ I! A4 |
3.
5 ^8 q% L7 U7 x1 q! E! m$ @7 R' t/ A
Suppose 4-6 > 1-3
3 f9 f  h: ^: J3 O3 J; \' |' K; Z3 ^: n8 h: ]( T
Just like the first Step: F( a( k( f+ c: t- A

9 G* b& P% H* Y/ W3 G: I4 vs 5 # Q1 W7 t2 |/ [3 R7 G
: \1 J! y2 {0 }5 f, ?
if 4=5 6 is the fake one + L6 Q% j; V* J* F5 [+ T
4 w" X& A1 J$ c+ _. U( l4 j
if 4>5  4 is the fake one ' |! _6 ?5 Z, m/ H$ }
and so on......................

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, _; k- z1 k. m0 p問題第二步
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# J0 }$ P6 V9 e0 J) RWeight 1:  1-6> 7-12+ f' o' t. r: Y
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6( X" l% M5 S/ l5 l# [, i

. L9 B, \$ D! J8 A你第三步点去搵 7-12 边一粒???
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% e# g: ?6 ~0 h) I========================================' k9 s7 [6 l5 c$ @0 o$ H
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問題第三步- F! z1 d* `. t' h) h3 j' A

0 O1 c! R5 O% u9 o# }) a6 t0 N7 z/ AWeight 1:  1-6> 7-128 f5 c7 e7 q! Q* i/ v( D

3 o# c* I% m) q! `. sWeight 2:  4-6 > 1-3
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+ F$ j! B) ?- b5 `0 {+ s+ r) J; [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