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+ W1 f6 v" J- {. @5 l  h
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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)。5 |* v, m8 t2 z1 @2 }1 b/ i5 C! b
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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% n6 G; e* _+ I- J3 h) p. {注意:
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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" m0 b' U/ E8 G$ m* P

% \6 E% v) @; W( V! P# k2. 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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# F& f" C( m) `% [+ I[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
& x. Y0 ]7 H6 ~+ N. }/ |1 A5 j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,
+ c1 J$ b; C5 _6 Z- C. F0 c等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。: y' }1 t& r7 \- [" V% t
13.........
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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:
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* V5 g2 ^  C3 K+ r/ {9 T) _/ \我以前畫左個chart去答,/ L( c. D! W+ N6 ~" J5 j$ p
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:$ g1 O0 T7 G2 n" a* `$ T( D
唔識隱藏...已經諗到..

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* W+ v* t$ J2 v) }' ], q; isor !!!....e加改左* j: V+ j4 K1 N4 K  x4 Q- ~

" C7 Z% {( B+ f" {8 H  l) V& Y: E8 [7 L% u2. 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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# ~, x9 F9 h; U* b1 a% {[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:9 b4 m: z6 V% m1 |* ~
相信e條題目都有吾少人玩...

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' y, b) {9 w' N1 V  jPlayPlay, Let me know later who has the right answer and I will add points accordingly.4 Z% M- k7 a+ k7 ~* v! ^# k: V: N; |

2 D& Y: s+ U2 b+ s3 G# JThanks

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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8 H& w+ w% C# o6 ]8 uThanks

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8 y& |) C2 ]% N7 r4 }不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
, t5 I% ^9 A! n; C1-6 vs 7-12
/ E- J" r0 d, c. w& E; k4 S% Q5 eif 1-6 = 7-12     13 is fake
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Weight the 2 time 5 {0 G8 b- C- h. b) J
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Suppose 1-6> 7-122 |6 d5 G% P- n! R# J/ ~

% y' ?  m! u7 t/ e4 M2 i) X' n) R: T1-3 vs 4-6
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0 g3 u+ L# B8 s" e" K2 h0 r6 Q, |Then Weight the Third5 `2 C+ \) y  G% X
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Suppose 4-6 > 1-3, T4 S# A/ {2 y6 G
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Just like the first Step7 i1 r4 y( v. _6 k& v

0 @- l" S2 Q- D: @" ?7 h4 vs 5
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  }% A, [6 F, P0 u9 @if 4=5 6 is the fake one 5 l! j- a+ @- `2 U
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if 4>5  4 is the fake one 3 R7 a$ i% M2 T% k
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and so on......................

hello1997

分3組4隻波子秤
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8 ?- Z7 n$ z6 i* S3 k2 SGroup A: 1,2,3,4
: |* e9 k  t' |0 |Group B: 5,6,7,8  u, g# c4 [& l
Group C: 9,10,11,12* s- P+ ?1 l( F' x9 \/ I
Group D: 13
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4 |  W! w( o7 N" T7 x- A, eRound 19 J. k: y1 v/ l7 J2 R
Group A vs Group B1 W/ x4 @% p& B
如A and B一樣, 即較輕一粒在Group C or D0 X) K/ r8 F/ \1 W
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Round 2
3 k  H% N& y3 ^! m再在Group C拆成:: D, o  G3 m, }' i7 o+ j$ ]0 L
Group Ca: 9,10
& Y; K9 H. P; I9 F1 I6 OGroup Cb: 11,127 R$ P. C$ O( s$ w
然後再秤, 如一樣, 即13為較輕一粒.$ H+ n3 p, ^1 L0 X7 S3 L
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如不同, 即較輕一組有一粒較輕波子在其中,
2 \' C6 h# r5 y9 a3 Q2 u( q要再秤, Round 3, 之後便知答案.( }# d4 [9 h0 M8 U
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e.g. #1 假設10為較輕的一粒; j& G" \. w8 B! C+ m
Round 1, z" _7 q4 J$ n
1,2,3,4 vs 5,6,7,8 = equal0 w4 X- R0 V; u0 W" M- g6 u( Q  D
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Round 2. W& J/ R! W9 J) D) c" T' ~
9,10 vs 11,12 = 9,10 < 11,12- h" a) j4 B3 v2 ?) D1 `* Q

. e+ D) s% D- U0 iRound 3
6 J) l4 O5 v8 Y" J; N7 T* ^! k- ], r9 vs 10 = 9 > 10
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: f  A: t8 ?" i  ?6 j0 ~$ pThe answer is 10.* q! a9 M# o" s; T% }* J0 u. \! O: o
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e.g. #2 假設7為較輕的一粒
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9 A0 c! z. U* H+ L1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2% J* q9 _0 w1 n& K' }
5,6 vs 7,8 = 5,6 > 7,8
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' @7 Y/ u9 [. {Round 3
1 c/ c" r& ~) o' O7 vs 8 = 7 < 87 U9 {" V- L6 Y  h, C9 N0 z4 X
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The answer is 7.
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6 f8 K1 `0 L! u/ t( Ge.g. #3 假設13為較輕的一粒
8 b$ J, T& r1 R5 q/ _7 a' WRound 1, L( R% a6 }8 k2 y3 _  x/ Q! B
1,2,3,4 vs 5,6,7,8 = equal
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" m, T/ J9 Q! E0 s& K) n# cRound 2
( ]3 n5 S6 G) _; g. p9,10 vs 11,12 = equal
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3 D: k- n. T9 z1 \6 B- A. `: XNo Round 39 ]: B  n: M9 C( G: w, p

1 k6 u) h7 l# v1 _# aThe answer is 13.1 @# k7 ^8 ^# z6 r* A

2 e8 k: h: f! V3 h( ]; X唔知我答得正唔正確呢?! 3 q4 j) S( B: Z* 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:
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1-6 vs 7-12) K6 i# u8 p# c5 u2 i# x
if 1-6 = 7-12     13 is fake' Y" u! W9 O3 C4 L% n& F

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- w4 b. @# E* S+ g1 y/ bWeight the 2 time 9 N" j5 Y) K" `6 M$ l6 j0 e- R# \

4 l  R4 D0 b& s& {5 [& v9 tSuppose 1-6> 7-12
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0 L# I8 i( J) R' G+ O. y+ [- o1-3 vs 4-6 ( b- o: r$ t9 H; T9 I! U

9 m3 w3 t' S4 H+ C& oThen Weight the Third1 M3 n8 _! L% L" U
3.3 B4 E, w# \7 f; W
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Suppose 4-6 > 1-3
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/ P; e% n/ B, ?1 m# m3 ?4 hJust like the first Step
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4 vs 5 ; c! F8 ^- W0 |* i
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if 4=5 6 is the fake one 5 |  S& K9 i" A' S! n8 _1 ^, A
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if 4>5  4 is the fake one
" s8 l$ e( k5 R' V. ~1 K4 ]2 S4 {and so on......................

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& S$ {% N0 r+ o問題第二步
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4 v* o2 x, [: R1 z$ WWeight 1:  1-6> 7-122 W% J7 e* U) ]7 ]1 q5 N& {

/ F) A. J3 s1 w: O, CWeight 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???, |* i# a( {5 m6 v

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問題第三步" H5 Y$ ]5 ]  S1 M6 S# ~1 y
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Weight 1:  1-6> 7-121 O% `1 q; b! r" F5 `. I1 @

0 M% p+ s8 X8 P8 X3 a4 h8 R7 r$ T* aWeight 2:  4-6 > 1-3 5 o2 @6 c  m+ R8 `
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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