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* F) M; `- C" B6 Y8 l) z8 h

: D# `* F$ R  W『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)。& q/ M1 J. M9 ]
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？』: D3 ]. W' l; z7 x6 u0 r

. _2 d% g* G* I8 R6 o" C( q) C: ?注意:
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5 ~% E6 u, _2 j- \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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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/ i$ Z  W$ s$ `6 H% C  j

! X- i4 k/ J/ Z7 K, H7 A[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 j/ d" k, U: |0 g% \5 f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,
: y8 \5 Q* D' b- v等我搵下仲在吾在- R! r* u( K3 ]9 {

2 m* M8 Y" K1 h3 ]# h當日用左37分鐘答１２粒波子，差７分鐘才合格。
( Y. I$ E( w  d" d5 w* ~13.........: j$ Q9 j" K# I) ?

+ s" \; U# [- H+ Z/ V1 A4 M' r6 x[ 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," ]$ |- g" F6 G. p
等我搵下...

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$ A! g" S6 J- O3 I/ Z* A- ~. x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 M6 O' ?0 p0 k; |4 Z
唔識隱藏...已經諗到..

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sor !!!....e加改左/ G' J0 V6 v* o: ], j- s- I  e0 x

, V& T3 p( \' I' N2 I2. 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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0 ~  }  k( }: u) N: 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:
) s$ m1 ]6 X0 }7 @4 {# O2 W. f" 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." R" d  v3 x5 Z" a2 I/ x. L; n6 v

+ V6 p+ Y& _8 W' A5 ]: ?0 ?/ NThanks

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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6 L) U- I7 b6 ^  s% fThanks

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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.
5 M0 T7 }9 }3 @- |2 u7 Q1-6 vs 7-12
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if not
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) d# l: i6 v5 [Weight the 2 time
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3 d3 |. T2 n( _/ @2 c- s1 uSuppose 1-6> 7-128 _1 h; Y) \8 i  o  @
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1-3 vs 4-6
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Then Weight the Third9 {6 x4 q4 D0 U9 T( u6 z8 B
3.
5 s; c$ ?. |% d7 i& Q
6 C: g4 [: T+ X1 g, S8 q1 E: pSuppose 4-6 > 1-31 A" F! `2 g" D  W, r5 F* d+ q/ ~
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Just like the first Step
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4 vs 5
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# V1 V- O  K# |7 o1 oif 4=5 6 is the fake one - O2 O3 g. h8 n/ P

1 G; _: e; m5 S; E; Nif 4>5  4 is the fake one 3 M9 L% X( P3 z* o1 H

" k3 u/ Y) ?+ X1 S: _and so on......................

hello1997

分3組4隻波子秤" @/ E/ D% y. Q: l. u' n

$ z0 u+ N  C9 o* n' z; iGroup A: 1,2,3,4
6 |7 Q) U% l3 RGroup B: 5,6,7,8
! ?) r' R- x% {; \+ t" aGroup C: 9,10,11,12
; [2 f: w0 h* t4 @( }( kGroup D: 13
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Round 14 j, Q) ]8 }& o$ m0 K7 o
Group A vs Group B* b9 K$ r, n: W
如A and B一樣, 即較輕一粒在Group C or D: x. p, J* p& I

. f! [' ~8 B$ Y: n) W" j7 }6 RRound 2
8 R. Y* \3 d& {8 J再在Group C拆成:
$ Y( y& f3 H- V) QGroup Ca: 9,10$ D7 M2 `3 U4 S6 k6 H# ?0 m/ l
Group Cb: 11,12
! e! P7 `; t0 q  n* X/ D9 T然後再秤, 如一樣, 即13為較輕一粒.
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( @8 r( [: T1 w: }: f* |9 \6 I* ?如不同, 即較輕一組有一粒較輕波子在其中, 0 e# f. D7 {* Q/ ?" C6 R' O
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
+ D; A  P2 ~' r7 k& q5 p' J& \, TRound 1$ A, L! m" }0 F( H/ n, p
1,2,3,4 vs 5,6,7,8 = equal& K( a/ S1 b; N  B

1 g6 \- G, O  k' yRound 2
/ G6 I6 W' {# w/ M6 x/ `9,10 vs 11,12 = 9,10 < 11,12/ b% E- T& s$ s( ?  ?
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Round 37 e- h" g. \5 `5 l4 T7 k: N0 Z
9 vs 10 = 9 > 10) X! [9 ?9 y2 _) e: w; ?8 i1 z
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The answer is 10.: l# J2 D" f* d9 S
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e.g. #2 假設7為較輕的一粒
+ g2 S; i0 ]8 z: cRound 1
% O" s3 T7 {+ A1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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6 \5 ]9 c; O& w6 q; F  b- m/ g) \8 ~7 NRound 2' m( `6 _# j6 n* ^9 P7 H4 n" l
5,6 vs 7,8 = 5,6 > 7,8
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; ?! C' Q+ m" U& i5 y0 \9 LRound 38 }4 }- K4 }& H* `0 V! r
7 vs 8 = 7 < 8
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The answer is 7.* x) U6 Y# u0 S! O0 \. Y' B

# L% u9 `% o8 Q3 me.g. #3 假設13為較輕的一粒$ [0 e& d7 w8 ]* h, A
Round 1
+ F. U5 U: g* f6 N& P* Y, N1,2,3,4 vs 5,6,7,8 = equal
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Round 2* a0 v  P* X! K
9,10 vs 11,12 = equal
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No Round 31 |5 G" H7 c* p6 r! J7 M' y

3 H; h6 s& T. y; n- TThe answer is 13.6 `& h, \$ H" Y! v. E. g# g' i

; N; n4 Q) O: S) z; H# c唔知我答得正唔正確呢?! $ R! ?9 p; }% p6 u& Z* d
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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
  ~5 R: f8 v- z3 y) ?1 l* rif 1-6 = 7-12     13 is fake1 \( p  h4 G. B8 L
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if not - E/ J8 q( N% P9 M) v
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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 " u# B6 r, k4 X. D
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Then Weight the Third
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/ \: Q5 d7 w, u' L% s3 NSuppose 4-6 > 1-3
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$ }& @: E1 |9 s' b, P6 O& xJust like the first Step. l5 A& `- @6 Q" X; o7 k

$ Q( S  b3 M3 m' E/ c' }5 s$ _4 vs 5
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: C& d. _& C3 G( n, P0 c, \% Eif 4=5 6 is the fake one
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. y, X8 {- E$ }; y9 M8 K" Bif 4>5  4 is the fake one 7 D. D, T% v: s# F: D
and so on......................

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問題第二步. `) K7 x) Y  Y' _6 h
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Weight 1:  1-6> 7-124 B. w8 G( ]4 Z& J, Z' i

7 d7 R6 p- h2 ?: S3 O4 L, yWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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; Q# p0 t) J; h* w你第三步点去搵 7-12 边一粒???' X% m) E- `' [+ r7 `

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6 \6 N; e  z. I2 q問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 & M/ R3 w* {$ X3 K: p
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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