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/ }. E) o. v$ H9 V
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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)。4 Z5 c! D) u3 `! T, O; N# \% 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？』" r. @6 n1 U0 |3 Q% G

9 Z1 l1 [, Y* ^! m8 w注意: ; P4 L( s, q: 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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' P" W0 ^, s6 d2 k( B- ^5 R1 j2. 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/ B! |4 i0 Y: y1 [  ^1 L
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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:- b- }# i+ n4 t, ^( X/ s
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,
+ G' o; t1 j6 B3 a! K9 K# D等我搵下仲在吾在+ v9 ^$ n9 T: D* N+ U& {& o$ G
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當日用左37分鐘答１２粒波子，差７分鐘才合格。7 J6 s, j' V: J; K. {1 Y5 o
13........., m# n5 v4 k, T% X, q2 S
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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:$ E! ]2 l0 {# z* Y2 b

0 k) F" J; Q3 p- I: s+ \我以前畫左個chart去答,) X6 \- u+ C6 J9 y0 R9 M+ A9 Z* b# ?
等我搵下...

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2 u, W. Y0 s: M$ B8 d8 z3 S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:
9 z  S* q: g9 I  v% m2 B唔識隱藏...已經諗到..

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sor !!!....e加改左
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( Y+ L* Z$ Q" ^# a$ 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" @, Z3 `& o8 A. y( d

( T9 F! M- V3 {$ \2 q* a+ Z[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:+ o/ p7 N# l. u0 g
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:
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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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; @; M; r( ~* w2 q- ?3 `不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
/ N1 ^0 W1 \9 k' k2 ^" K5 W  o1-6 vs 7-122 g" Z( |% E7 s/ m
if 1-6 = 7-12     13 is fake& k5 N7 u+ n/ C" T6 [
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if not 1 L8 ~# r4 f6 n  z# d

9 p2 c' N- U; V! a! H& tWeight the 2 time
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Suppose 1-6> 7-120 h( _$ H/ S: p
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1-3 vs 4-6 1 O9 r/ Q5 Z: G

) p. t& L# [2 n: i' hThen Weight the Third
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Suppose 4-6 > 1-33 D) _0 }: H2 q1 j& F* n$ i

4 G; J& z/ R. @( G% J. ]) u8 IJust like the first Step. R4 x- E$ H/ `3 I% X& L+ R* K& d
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4 vs 5
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if 4=5 6 is the fake one 5 ]" J) ]* T9 U: q1 w$ H

8 @3 [" X$ @, |* G$ Xif 4>5  4 is the fake one
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" ~5 D" j, e$ Q* R. v+ O) {and so on......................

hello1997

分3組4隻波子秤
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3 a; w" C% v: vGroup A: 1,2,3,4* V7 j; J9 y6 J  p" Y
Group B: 5,6,7,87 ^& p) ^; |- }7 q9 m
Group C: 9,10,11,12, G9 F, v, G6 ]' W3 c
Group D: 13
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Round 10 l' T& R2 N& }. H$ `, Q
Group A vs Group B
$ f/ u8 [* S! V0 _( _0 K如A and B一樣, 即較輕一粒在Group C or D( s! v+ s- Z9 w: k; k" Q: a2 W/ [

  ~( M  H+ J! N$ k7 K. l4 HRound 22 |: u, @- \5 k* b3 {
再在Group C拆成:/ T4 p6 @( x$ `, I
Group Ca: 9,10# P- j; S+ r6 t! g+ E
Group Cb: 11,124 R- P  w) G( f. q
然後再秤, 如一樣, 即13為較輕一粒.& N+ @/ w6 J4 a$ I' O0 ]

8 z, D( m+ S* h8 ]  O; X+ R如不同, 即較輕一組有一粒較輕波子在其中, 7 {2 X7 E4 Y' c: d; s! m
要再秤, Round 3, 之後便知答案.; J- g6 j& F" B% D
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e.g. #1 假設10為較輕的一粒
0 L5 q5 N! s/ V( ]- D& w) gRound 1; m1 K: l5 v$ l
1,2,3,4 vs 5,6,7,8 = equal
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' r4 F. s1 D& @Round 2
1 m& N/ w7 P1 X9,10 vs 11,12 = 9,10 < 11,12
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. t3 I  t, {9 H* l' t, mRound 3' g6 I1 G# ?0 w; Y# j; I
9 vs 10 = 9 > 107 E/ \: E3 O& H4 o5 a

( D$ B; |7 i" C( F+ k+ ^The answer is 10.
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  ]3 x' W" O' Ne.g. #2 假設7為較輕的一粒- a- v. R4 Y1 v2 M
Round 1
# O3 n+ L, m% v. c3 A1 |3 R1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% ?* r  k4 x' w) W% |8 q$ I$ H3 F
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Round 2
) m3 j8 V# C7 s7 d$ \, G  g5,6 vs 7,8 = 5,6 > 7,8
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; A5 M$ w, g% A+ X% ?Round 3
; j) V4 V  O+ _: J6 f' L; F7 vs 8 = 7 < 8
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& v! s  k- M) w" A$ C& _The answer is 7.7 k- b, r/ R- d% G& F, _7 i

. x$ e+ [- a& ^' Ne.g. #3 假設13為較輕的一粒2 J# c# Z0 @/ P. G& v. s" w3 e
Round 1
2 w' c  b# z( p/ E$ L1 ?1,2,3,4 vs 5,6,7,8 = equal0 |& S1 B8 w# a3 D

, D  Y( J9 D3 t* m  s7 |Round 2& _+ |. R/ M! K$ f( {
9,10 vs 11,12 = equal& w* u; O* @9 K2 m/ c; _

. m( d% W; l" ~& C8 tNo Round 3
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The answer is 13./ i. V8 S# w  U6 \" E

$ r- \( Q% u& i3 c" K/ J; M" f8 x唔知我答得正唔正確呢?! * f" C2 X3 n2 z8 S4 s9 ]; }. B
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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:/ T; o* b4 @% i& Z; P. d4 z
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1-6 vs 7-12+ B( y7 c5 J) e7 f2 d9 a* n& _
if 1-6 = 7-12     13 is fake
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5 o. T& U& k+ [7 J. a$ Pif not
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Weight the 2 time ) I9 G0 P7 C7 p; @& C
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Suppose 1-6> 7-12
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1-3 vs 4-6 " ]  [- J! ]% C- J2 P+ o
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Then Weight the Third3 Z8 A; k- b2 x& i5 W* h5 A2 o
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4 v* b; h, `& _! X. LSuppose 4-6 > 1-3
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7 K: f# m- z; cJust like the first Step' ?3 x" J# s' X! P6 g

  d( E2 D0 y5 J2 v) f4 vs 5 ! d1 I% R0 v' V$ ~" B/ d8 O
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
. ?' F; o  B2 I' z5 H$ f+ ?: sand so on......................

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問題第二步
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Weight 1:  1-6> 7-129 y8 G3 s1 J% X( e$ U- ]

/ d$ Z0 E) K% v8 WWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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) k; s5 Q. |, v你第三步点去搵 7-12 边一粒???
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9 g0 b/ u8 L, ?0 j* Y4 U========================================
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0 Y# o! x" v4 \( B  B問題第三步
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Weight 1:  1-6> 7-129 p0 }* p$ l: b% \+ o
$ b5 a$ @, e# v8 k) Y: }: R2 ^
Weight 2:  4-6 > 1-3 8 B' y/ l7 [- ]" Z/ Y. @+ F

' [3 j. N; R! A8 K# l* C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