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& r- g, \: F' T3 k
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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)。& h9 P7 W* `+ T5 G. J
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？』7 U: `+ K1 S* M) P  A9 n% d' o

: N0 p0 j! R1 j& T9 f8 P5 e; N9 r' t注意: 0 }$ i. `, n2 V) l7 r5 |+ g

: l9 v, \5 [; l7 }, v0 z1. 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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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- W& T& s8 g+ F+ W+ M8 I' Y- c: C

  K' }2 F3 i* R5 E[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:! J) r2 b1 R' Y/ S
相信e條題目都有吾少人玩...

$ v9 D* ]5 ~6 C% F1 k( F我以前畫左個chart去答,1 \7 F+ ?; [) P( z( D
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。
1 ^! }; v) O2 l. B13.........4 D! v2 ~1 k4 e( d5 G: u* G; `2 G

% X" F2 n! R8 B8 g* [[ 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,+ m* w" _4 U% D$ n% f9 y( |0 a  h2 D
等我搵下...

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+ j* O0 _# K; l( E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 n7 g! ?& r/ H5 M唔識隱藏...已經諗到..

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sor !!!....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
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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:) z& O" x9 J: L/ W* ~
相信e條題目都有吾少人玩...

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; O2 x/ u  W1 M+ W  y6 C* \# f2 |PlayPlay, Let me know later who has the right answer and I will add points accordingly.( p0 O8 u& E3 Z/ ^6 `; }

; W! v0 e( Q6 f* q5 ^& hThanks

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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. w. V) u: Z( V  E* GThanks

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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

1.
+ e: J! y, C2 f& C; Z* e1-6 vs 7-12
5 u, V9 j( X/ s2 L: [5 @if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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9 |1 `: U; x2 h) G, p' l+ ?6 BSuppose 4-6 > 1-3
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Just like the first Step2 e( Q) F8 n& t7 H. ^# [6 X

6 O8 [+ ^( }8 x8 h: S7 x4 vs 5 ; @( O0 `, C9 b+ T

+ J4 S' Y$ x5 K6 f) X' x- T0 l) Qif 4=5 6 is the fake one / k- q% m3 n; P% ?3 h+ @' F

* r3 l, f# ?- b. {, jif 4>5  4 is the fake one & X6 [, j1 q0 o6 }0 I. c/ V3 h+ b- _
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and so on......................

hello1997

分3組4隻波子秤8 i4 j2 {1 x" b' e; q

+ j7 n2 Z5 P; v! H  w% }0 H6 b" jGroup A: 1,2,3,4
2 w5 l# B/ a; L8 p% y; `Group B: 5,6,7,8
5 E& B6 }- a5 I$ w; FGroup C: 9,10,11,12
: y2 ]/ _% i1 nGroup D: 136 s% W. v7 h2 ~
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Round 1
  W1 x( O) I. y( L3 b$ M% eGroup A vs Group B
2 L: v: v* v) C& ^# ]$ S如A and B一樣, 即較輕一粒在Group C or D
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Round 2
+ j' H6 E4 p6 X* E7 k, J$ Y2 A再在Group C拆成:
( R+ `6 Y' N" u" XGroup Ca: 9,10
$ t  Q$ `) R4 oGroup Cb: 11,12# W! S8 A# X# f1 M* D
然後再秤, 如一樣, 即13為較輕一粒.
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) w6 j/ ]! u  @3 ~3 D如不同, 即較輕一組有一粒較輕波子在其中, 1 w$ z& ^2 x7 ]
要再秤, Round 3, 之後便知答案., ]  b# b! o- x: w9 U

: ^$ R3 r) J. `) i% ^! je.g. #1 假設10為較輕的一粒
0 v/ P/ R- k) o1 I  L' G- fRound 18 Q6 K' {* k" x8 P
1,2,3,4 vs 5,6,7,8 = equal
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7 ?" }% x+ f% W3 Q5 {Round 2
" W3 z( ~9 ~+ r6 ]3 X- W7 l+ [9,10 vs 11,12 = 9,10 < 11,125 k& H  N' Y- _& {! B& P) n: Z
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Round 3
1 a+ P; B  a/ F; W& i9 vs 10 = 9 > 10$ \2 l* L6 o; ]6 ^$ U

  Z8 |+ i+ @" z: h. T+ F+ w+ wThe answer is 10.
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e.g. #2 假設7為較輕的一粒
# S  v" ]9 M. y; c1 I9 U: k4 HRound 1* \$ Q. Z/ J" S# i' j
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. ]4 I& y' Z- Q# ~  k/ E! F

0 [2 G9 a6 }& o, ^8 {) TRound 2: d2 a% j) [8 d+ o% g# j( a
5,6 vs 7,8 = 5,6 > 7,8( P1 {4 B9 Y9 }6 G8 ^
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Round 30 {/ U5 B) e9 [4 ?
7 vs 8 = 7 < 8+ p/ k9 s5 p4 `
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The answer is 7.
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9 f  [1 i% V( N8 Re.g. #3 假設13為較輕的一粒
& n3 I; t7 {" e' uRound 1
3 Z! J; T% d' }) t1,2,3,4 vs 5,6,7,8 = equal  ^- b: A+ h  Z8 f

% T" w. G' J, w5 kRound 2* J! f( J% n& z* \- |; O- ?1 x" Z
9,10 vs 11,12 = equal9 [7 L- Q6 @6 i/ Z

1 ~+ L$ x/ \8 J2 H* N; e  D' ANo Round 3
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The answer is 13.6 t3 k9 n2 r$ @/ J) i$ n+ `9 v
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唔知我答得正唔正確呢?!
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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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3 ^0 I" t1 ~/ D) m* f7 C" A: ^: d1-6 vs 7-12
' f$ w* z" h9 Rif 1-6 = 7-12     13 is fake. R/ u$ q$ M& l  N

8 O2 O$ i2 v5 bif not
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4 {. w4 H' N8 A& N) e4 B( vWeight the 2 time
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7 P% S" u  }! j( u' XSuppose 1-6> 7-12
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3 B( V7 o1 e+ d+ J1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3+ C& z2 q6 l/ M% s7 c: O3 B- L7 j& V

2 }9 Q1 R. M( i: CJust like the first Step
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4 vs 5 0 Z% r( G# n/ [, c

0 N% o' [+ r( m7 U# m" V6 dif 4=5 6 is the fake one
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3 d% T7 H& Q. W' u& Iif 4>5  4 is the fake one 0 x9 V' s9 w5 B
and so on......................

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問題第二步2 b* J' p5 o$ x3 n& z, ^
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Weight 1:  1-6> 7-12
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( r4 a$ I0 m/ f! q; hWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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* p: p0 ~5 x" H9 k你第三步点去搵 7-12 边一粒???3 b6 T9 H! }$ _4 Y! s0 y
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========================================, @& e2 m0 w! q$ l

$ [7 N* A% |  B: |( v5 J問題第三步% n. M9 C* V! q) P
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Weight 1:  1-6> 7-12( [/ D$ I! Y6 A  U4 A' r: a& l

; s+ d6 K9 g0 w; \  P  e" V$ S7 @Weight 2:  4-6 > 1-3
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$ e7 g9 \; \+ ^$ v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