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& n: ?! F" ^5 V, V% l2 ]6 L

; @' |$ U! _. \  @. w『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)。1 M# V' I: r6 |# Q& G
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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2 E  l# \. M& f注意:
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- b1 P1 q- f& {2 e1. 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  b( P- ~, c% z: J& B

- [+ o) ?1 ]$ H& U5 K' r! P4 I: V6 q2. 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/ I& u6 S" o/ R9 \& S
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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:- O/ Y4 e1 \4 L0 U* }! Y$ x
相信e條題目都有吾少人玩...

0 Z1 r+ M, h% S( Z我以前畫左個chart去答,5 x& a% v: s1 |8 B1 h/ U
等我搵下仲在吾在
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- |: C" F3 ~5 [3 H; ^" H( U, ^當日用左37分鐘答１２粒波子，差７分鐘才合格。
4 A! X. c+ `/ G2 U' l13.........
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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:+ a" x; \; p3 x6 v5 ~) p3 I
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我以前畫左個chart去答,! x; j( _6 X0 Z
等我搵下...

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' J- b' S: N- v6 @5 }0 @. a8 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:+ J4 Y4 e. ~& |3 n5 P
唔識隱藏...已經諗到..

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sor !!!....e加改左* a" ^, \9 z( S$ Y

: ]& R4 G- G( \3 G- n2. 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+ h9 q0 |$ A8 O; Q' d5 U7 M

4 v3 b3 G2 i7 v[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
- u" _* \0 P/ o3 E; L; S) Y, j/ W1 ?相信e條題目都有吾少人玩...

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* H/ ~7 C! m1 J" k7 y. sPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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9 Y# z; P" x/ V9 N/ u. W! X) uThanks

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.
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' ]* a! I- I, c  I9 lThanks

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! M& q# n; N; A* C$ E0 b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
' K9 e5 \/ q- k! C7 w, J9 Zif 1-6 = 7-12     13 is fake
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if not ! N* Z9 c0 M  `7 n! ~# ?. d& O

: N# l; U1 c6 `% F' W5 w1 e( OWeight the 2 time + m! P8 e( \6 T- ^" Q" A
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Suppose 1-6> 7-120 e# D4 ~5 `2 V! A

) g7 L  X6 D' |  Y, F1-3 vs 4-6 - `7 s* `$ @7 [

) I: V" `$ a: F3 l4 X- GThen Weight the Third
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* x- a  d- p; f- D# }& }/ pSuppose 4-6 > 1-35 u% X) z- a& c& x8 x

' i" a9 m4 K  R! s6 j# T3 EJust like the first Step
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/ ?( s; f& |9 H: v4 vs 5
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. h( M) l! n9 N1 Pif 4=5 6 is the fake one $ j" u: I% w. _2 m7 J) O" Z* Y7 _/ b
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if 4>5  4 is the fake one ' ~% L6 _: E1 z9 B8 i
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and so on......................

hello1997

分3組4隻波子秤
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* I: H2 p3 e' D. }Group A: 1,2,3,4
4 p2 _6 H' A, |# w3 P$ J, YGroup B: 5,6,7,8) p: y. w% T3 C& k9 B5 e
Group C: 9,10,11,12
8 N$ @  ?; V, g/ Y7 W" ]8 yGroup D: 13
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Round 1, w/ k  f5 n1 v1 _3 d2 K
Group A vs Group B% v' N/ Q7 J" E# n
如A and B一樣, 即較輕一粒在Group C or D; v1 F% {5 a, c9 a  C/ `& n% s5 m( W
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Round 2: g: J3 O5 j- U  Q2 t& b
再在Group C拆成:1 _9 ~2 u' |3 ?7 m4 C
Group Ca: 9,10: k2 O7 d0 a* ^7 V3 c( o) Z
Group Cb: 11,12
; p0 Z0 C" k( `1 w' a然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
4 x! F! e- t/ Q1 F0 S要再秤, Round 3, 之後便知答案.
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( L6 ?" H' e% @4 ve.g. #1 假設10為較輕的一粒5 P! m2 a8 E# |( ~9 H  L, ?
Round 1
% k  V/ A3 [6 T. S1,2,3,4 vs 5,6,7,8 = equal4 E( i+ x4 g; ?0 }: l$ s5 k+ C
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Round 2
+ ]" y6 C+ h  P$ U& N# o9,10 vs 11,12 = 9,10 < 11,12- f* I, R+ c1 a8 n9 H; n9 A

5 {- l. b6 D; y" C. b5 ]2 pRound 3
6 h3 p6 p5 K  h+ w+ t9 vs 10 = 9 > 10- p0 @+ B) ^$ Z8 s
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The answer is 10.
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e.g. #2 假設7為較輕的一粒/ ?0 n* O5 A& g! J9 ]
Round 1  g. T4 s0 R4 a( c3 n9 ~
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8+ b. Q5 T; k2 y+ w6 E
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Round 2
- b6 d5 B% v0 |, e5,6 vs 7,8 = 5,6 > 7,8
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Round 3
; M) P5 @! f+ L' d  [1 B2 h7 vs 8 = 7 < 8
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) U- ?: k! R1 J. e- N! \The answer is 7.
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal* t. a1 b5 E2 T7 f
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Round 2
* s+ \' a0 Y4 m6 t9,10 vs 11,12 = equal0 _" u) i" j  T1 W
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No Round 3
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The answer is 13.
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9 q9 o2 ^( [. R唔知我答得正唔正確呢?! $ ]/ T1 W9 B' U0 _" }8 G
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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:
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1-6 vs 7-12
$ g' @" \8 h! W, D2 y0 Vif 1-6 = 7-12     13 is fake2 D# i! C5 N3 D4 e( M3 |+ w

: l3 I$ s7 H1 o0 @" r  yif not . r# T, E7 N. n) w! h
$ A3 f* b2 A0 A" Z' ?
Weight the 2 time
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Suppose 1-6> 7-12% A4 b5 |' P4 \- Z- B* b$ I
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1-3 vs 4-6
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Then Weight the Third8 `0 H* Z6 o6 H* c
3.
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: N& ]6 W7 f- W% M: V( uSuppose 4-6 > 1-3
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Just like the first Step
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5 C3 q5 Y1 \' A' D; H. u4 vs 5
  _' f2 V! X* W1 F' f9 q; C
5 n* Z/ g4 M9 yif 4=5 6 is the fake one
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- d7 W3 U8 P; ?9 Eif 4>5  4 is the fake one / r3 N0 q, M+ Q6 s3 @" d9 M
and so on......................

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問題第二步
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8 {3 Y! h1 Q& t7 W& Q6 zWeight 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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你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12" J4 H5 B. Z- ~, R/ N
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Weight 2:  4-6 > 1-3 : S& h6 P( J- s( c

7 l! V% x( I7 k4 a4 ^( ?1 o: g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