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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: D; V" n% D7 J" t& @7 \; J3 o$ A『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)。
& C% \6 i( _" a- I0 k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 t4 L/ @1 y( `
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注意: $ h2 ?% n" Z" Z; d
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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- F' n+ V% V9 u" {; a0 \
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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# Q$ j; m$ F$ V5 h" ^

. V5 |& ?& L" N[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
, h9 ?2 [) z) D% e4 S, v- @  f, I相信e條題目都有吾少人玩...

. S+ S; Y8 z. ], e我以前畫左個chart去答,
# V* F" g; ^9 f等我搵下仲在吾在
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  H: a- x1 X1 Q6 Y+ L/ H當日用左37分鐘答１２粒波子，差７分鐘才合格。
! X4 t+ H" y  P/ A- k% l13.........& g# Z/ C) k' O1 R5 G5 j- E6 d' s3 o& x

; a6 V' U# W* k6 T[ 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,5 k$ s" V3 S  E  N# o0 J2 ]
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:
3 m, F& m! Q  t唔識隱藏...已經諗到..

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2 T% e8 B- |6 D( b# rsor !!!....e加改左
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: j; j1 @1 y# |) G5 z5 E, m: 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
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4 ^, S' K6 v7 @3 C& m" c* u[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:( B  C8 E# X4 J5 B  b
相信e條題目都有吾少人玩...

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9 Q4 M3 f3 T( v; U& ~3 s" @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:2 }8 ~; V' H1 [8 U1 {

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3 i6 J6 u; s! ^2 N. s) wPlayPlay, Let me know later who has the right answer and I will add points accordingly.* F' h- G" g9 W6 V) V/ B

' m0 _8 e: |9 a- [- l/ |, H8 cThanks

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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

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1-6 vs 7-12
: S# k5 M- h% R  V+ K4 Dif 1-6 = 7-12     13 is fake8 t* v2 p) p, `8 G) T  O3 g% {

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Weight the 2 time
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Suppose 1-6> 7-12, ~- u2 r$ O8 V2 H3 Y$ e5 K: M8 Q

! b+ {9 q9 y. f- z* [3 c- d, g1 k) C1-3 vs 4-6
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Then Weight the Third( n+ ?/ j' K* ^+ e8 U" R3 Q/ I' U
3.
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3 |+ O5 E9 V- Y  d& Y$ J0 PSuppose 4-6 > 1-3
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5 i; \4 p4 {9 F) I9 y3 Y+ bJust like the first Step
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- n9 T" ]$ X0 |4 vs 5 3 G6 s) Z) h5 J, k5 {
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if 4=5 6 is the fake one $ e/ J* c1 `* E% ?: o
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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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( M! A" _8 M, S% i/ _2 C6 u. ]Group A: 1,2,3,4
, a- [1 y# U- u% p+ x. m# WGroup B: 5,6,7,8
7 ^" c3 ]$ ^9 L. h# I1 b" rGroup C: 9,10,11,12* P0 \) x( P1 n+ g3 q, [
Group D: 136 q# w+ Y: h5 V. {

  z# O, P  ]& l! ]Round 1* M: I4 o# A+ E% i1 X
Group A vs Group B1 z+ x( A* h, u5 P! k
如A and B一樣, 即較輕一粒在Group C or D
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Round 2' }; K2 R: }8 F% n( w' x
再在Group C拆成:# B3 w& w+ I) A7 i) T
Group Ca: 9,10) u( C; O2 y/ A4 P, C
Group Cb: 11,121 o+ R9 J% A* v* X/ {5 u- N: c! x
然後再秤, 如一樣, 即13為較輕一粒.# p: l( f$ P4 Z1 @0 L; x
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如不同, 即較輕一組有一粒較輕波子在其中, $ e" C! i( k5 G+ z0 e
要再秤, Round 3, 之後便知答案.* E& A2 }6 q; r' A6 ]- M
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e.g. #1 假設10為較輕的一粒
. D+ b4 F; L! n/ nRound 1+ H% |4 w& k3 F- T! Z
1,2,3,4 vs 5,6,7,8 = equal5 Z6 Y8 s0 D( H; j0 K  E/ y1 x
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Round 2
  R. P7 B4 z% F1 q0 j9,10 vs 11,12 = 9,10 < 11,12
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Round 3
% R* [9 `# [4 T8 @& ?( H9 vs 10 = 9 > 10' k: L, _6 O5 p4 W
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The answer is 10.
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1 U0 n- P. u8 o* ne.g. #2 假設7為較輕的一粒
' a% ?9 P2 ?; p+ k% R6 bRound 15 U! ?1 a* Z  M- Z# {) V+ j
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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4 I: A  K, w' f# a5 cRound 2
) G' I& B# @" c. c1 o2 V. F; ^5,6 vs 7,8 = 5,6 > 7,85 h( h* m8 w/ w: {# Z3 B! f$ \, M+ M
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Round 38 ]6 v9 d/ E9 C% S6 D1 I- c  b
7 vs 8 = 7 < 8
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" |3 q# ?0 M' N- ^* NThe answer is 7.( X( U$ \! I) c* z# J5 P; i4 F
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e.g. #3 假設13為較輕的一粒
: }  X- o7 M& d% bRound 1
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Round 2
' `: Y- q) A+ [) R  l% {* K9,10 vs 11,12 = equal
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No Round 3
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$ P1 j" H: J* M8 C" kThe answer is 13.
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唔知我答得正唔正確呢?! # y% O( [# K6 d& `9 U! X
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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:6 J  \5 i6 p# r2 Q
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1-6 vs 7-12
( |% r% V* Z7 h! c- wif 1-6 = 7-12     13 is fake
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if not
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/ Z1 w8 ?' V0 U3 a* j$ iWeight the 2 time ( Z' E3 @5 L( t# X$ {$ H& K# d

( I$ a. j4 R: A9 tSuppose 1-6> 7-12
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1-3 vs 4-6
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8 @$ B& u) ]# V  \7 CThen Weight the Third
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. U- U( l4 s/ B* \6 PSuppose 4-6 > 1-3* q7 `' c( _0 L- N5 O

9 o6 l) x: e$ WJust like the first Step
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; T! Z1 e/ c" ~2 y5 O4 vs 5
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2 c+ r  R8 A; {- ^5 N( `9 h% V) B) tif 4=5 6 is the fake one
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7 N) W5 w# h$ h6 sif 4>5  4 is the fake one
& O$ c- C6 N1 W, S9 I! \- j9 qand so on......................

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問題第二步+ M6 l0 `7 m) e) N0 p- Z

: w/ t9 c/ k5 X% k  i8 P, `* B! YWeight 1:  1-6> 7-12
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/ y: y6 }1 P) E1 w5 p8 HWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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  ^; m/ b$ ]3 `' s; b- j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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# d' U  k9 c( C! R& p$ gWeight 1:  1-6> 7-122 y% j* m0 f$ K- d
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Weight 2:  4-6 > 1-3
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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