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 G" t  q% C* y# v

( S5 @7 T0 g3 s9 h/ H+ ]『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)。( ^& K8 O  ^6 Y* Z$ ^, |+ t. R
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？』! T8 O7 e: I( v! Z- _: D

* f5 l4 v9 P: S+ y( }, w% g3 q, e注意: 9 x5 R4 k7 F( ?2 K
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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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- M. q) `/ S  o7 G' r. V3 L1 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  , 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:) _  t& w, z& G8 n" z  _  H
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,; D# z! S3 a. `% }
等我搵下仲在吾在
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7 r5 f  o( f7 ^) C$ `) l當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 M$ ]$ H0 m1 {# D$ Q5 U13.........
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, J  s) u$ o1 F* B$ j: k[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:: ~8 h- O3 U* J9 Y
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我以前畫左個chart去答,
1 N" a% B) M' Y4 O等我搵下...

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% E# s& Z# l8 f0 f# T2 l! j# r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:: K9 }& L, S( n! l' S
唔識隱藏...已經諗到..

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( Y3 a% _) g  V$ T# q- Q/ Csor !!!....e加改左
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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8 a2 l4 q# z' i4 P, ?
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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:+ E1 u% |( @5 K( _6 Q$ B
相信e條題目都有吾少人玩...

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& D9 v3 N; z2 B1 p) K7 WPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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& G7 r# z/ W( x& v  PThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& }: L( z' m: e7 \

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$ Q( W. R2 H( ZPlayPlay, Let me know later who has the right answer and I will add points accordingly.' a$ {$ G, g& \! X1 l3 z
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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

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1-6 vs 7-120 _9 |  I# f) f) ~
if 1-6 = 7-12     13 is fake
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& d/ @) o% Y0 \) f! YWeight the 2 time 2 T% ~$ y; m1 W; k6 B
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Suppose 1-6> 7-12  P- R9 M( j/ i7 ^) l, w. p- U3 [9 o

) J4 b: K! V/ B1 {/ a9 q1-3 vs 4-6
8 _+ V! ]! z7 X2 C  @5 A
7 {" Y! b% f* Z3 dThen Weight the Third$ Y8 `6 ^) ]' X9 E
3.) r: `2 M$ V8 T3 }3 {" h; {) y" I
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Suppose 4-6 > 1-3
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Just like the first Step- A& {) k1 Z7 T4 B. N% F0 l1 ~

2 P+ G- r/ E& m" `0 {7 k: e4 vs 5
6 R  r5 H/ ]5 `+ C& O/ m: }6 Z' s. Q- l( d8 G3 w5 J& u0 p
if 4=5 6 is the fake one
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if 4>5  4 is the fake one 4 q! F+ L  B" f3 j) R
  B' Z0 {' X5 L" L8 [* ^  V" a
and so on......................

hello1997

分3組4隻波子秤7 |  ]% o' Y. |$ {8 E$ G5 T5 R: [, z3 A

; y" _- c3 Z, RGroup A: 1,2,3,4
) X$ m& N8 Z& l' x  ^9 \8 {Group B: 5,6,7,8* l3 \" ?  C; c# Y- {+ R/ G0 }
Group C: 9,10,11,12
5 h3 n/ W6 [6 fGroup D: 13
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* W  A" p4 ^, c; P7 hRound 1. T) W, r) g8 S# D1 o* a( V: D
Group A vs Group B
9 ^3 |; f5 q+ G1 s4 T. r3 T如A and B一樣, 即較輕一粒在Group C or D4 w4 r1 h( s5 j; u4 Z( Z% I
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Round 2+ S7 M" {% `4 c0 n
再在Group C拆成:1 t! W2 d0 l: D5 A/ h9 U" J. n" V
Group Ca: 9,10- {# {' g* R- m
Group Cb: 11,121 u2 @( k  U% M# t* }2 k% E5 j
然後再秤, 如一樣, 即13為較輕一粒.  @2 U9 d. v( _: x% K

& b# a* @5 O: U1 u$ [7 {1 s如不同, 即較輕一組有一粒較輕波子在其中, * e  W: Q5 t, f, o8 }& o, ~* D9 e: N4 a
要再秤, Round 3, 之後便知答案.
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! u/ q+ `4 z% D+ s+ Te.g. #1 假設10為較輕的一粒
4 |$ @% y4 Q: {: G1 MRound 1
# }: S: n% a8 U# x+ z7 u1 ]* T8 w! m1,2,3,4 vs 5,6,7,8 = equal
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Round 2
/ z5 y4 z# `( b% E' ]9,10 vs 11,12 = 9,10 < 11,12$ e! O) t; O; `. P7 a8 J; |
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Round 3  U4 G7 n+ p# ?7 ~- Y: s9 M
9 vs 10 = 9 > 10
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! Q. S6 T! P1 X8 gThe answer is 10.
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e.g. #2 假設7為較輕的一粒: i1 V5 F  B* W6 S- ^  H! _
Round 1& y& n: ]7 q$ ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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0 y3 M7 M8 F: x% Y( T# MRound 2
* F7 K1 s. j6 Y6 b5,6 vs 7,8 = 5,6 > 7,8' i) t8 S/ g, m. R

  a6 i5 _3 M! f. A4 H6 BRound 3
) t+ z( Z% d. S( `& p& l7 vs 8 = 7 < 8; V% ]2 L/ q4 K2 l$ Z" t0 q7 L  g! h

. {# V6 I4 i5 qThe answer is 7.
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4 ^" e1 x" @5 E5 o2 R8 Q7 ne.g. #3 假設13為較輕的一粒
" v8 k$ v3 g% J3 HRound 1
! i/ d- M, |  t# Y1,2,3,4 vs 5,6,7,8 = equal
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Round 2
, E5 s1 w' S, y1 z9,10 vs 11,12 = equal1 W2 {, m4 {3 q' h: Z: c4 f& N, {
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No Round 3
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! ^! H7 e, ]8 l) W$ m: hThe answer is 13.
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! i$ ~- F- }9 _" s! @# f! ?  v唔知我答得正唔正確呢?!
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& x' O/ K) b- d: b& F* p. b6 A[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:8 }# C, O9 z7 J2 T
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1-6 vs 7-12' y' G) b, a) D
if 1-6 = 7-12     13 is fake2 \5 }5 N2 i/ N: q8 g

( |. N3 E2 u5 _if not , `  C* c8 M# v) b: H2 \) b

+ J: L9 ?& A! c8 pWeight the 2 time # P" f. q) p" c; \8 p: U' }

% {. @: D9 }* o& I. {Suppose 1-6> 7-12
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1-3 vs 4-6 3 R7 T# N: b3 A% {2 H$ r

7 }$ x( M! c1 h. H& QThen Weight the Third/ e8 T* s& {* y% q
3.
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Suppose 4-6 > 1-3+ B( Z. m+ Y' o; _; f" H, H

" |" ?) @9 N" tJust like the first Step
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: v$ a/ t- K1 I- z5 Y3 g' Y4 vs 5
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if 4=5 6 is the fake one ( n$ l3 V" p" f. Z- {1 ^
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if 4>5  4 is the fake one
' `" l% H( `$ R( v% ~7 C* Sand so on......................

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( K) [5 N4 o9 T4 |6 G: e# z問題第二步
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0 r; _7 ^+ |; B& QWeight 1:  1-6> 7-125 j; t/ s( q7 `( U% Z- e- [

7 ~  H4 H& W1 i/ r) G5 f) D2 D7 XWeight 2:  1-3 vs 4-6 , if 1-3 = 4-63 ~' L" q6 e# J
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你第三步点去搵 7-12 边一粒???
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+ D9 N8 b/ k: v9 {========================================
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0 `4 r# i# |3 A# y0 j問題第三步
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0 _1 \5 ]9 j" iWeight 1:  1-6> 7-12# [7 c% j7 L3 A4 a5 u
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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