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
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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 ?! b4 A+ d2 X6 O$ B) T5 |
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？』* k7 Z& j6 ~% v) @
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注意:
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) y6 p! b' G2 Q( B4 E5 D1. 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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+ w9 C, |% V7 D6 c9 f4 W2. 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, o4 d8 M. Z8 L2 a2 W
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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:
! a) l, f2 T. \+ i9 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,
" T2 `. z4 m' P; p) E2 R等我搵下仲在吾在
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5 P8 @9 S$ M: N6 Y! z當日用左37分鐘答１２粒波子，差７分鐘才合格。! C$ {( [$ G8 `6 d( {
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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我以前畫左個chart去答,& B: L7 ?2 Q% t8 U1 I* t9 P! P" N
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:
  C/ m0 k* e3 v+ s; X唔識隱藏...已經諗到..

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4 _1 V' J' o" e7 d# E; V; osor !!!....e加改左
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  n  M$ d  Y% d* ^# @2 Y2. 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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( E4 L! T4 |. w, j# I- j[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
& ]: j0 r' e% H) D相信e條題目都有吾少人玩...

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- L4 t  ], V! K& Q# w, yPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 @: a1 C+ p0 O/ v' ~( K3 D' ~& x
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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.! @/ `+ R) H7 k$ ^' {
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Thanks

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% ~* z5 R% C4 N$ ?& s+ Q不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.1 r& w! F( l% ^4 T" @( v& j3 |: ]; M0 m
1-6 vs 7-12+ w- `6 {% u. r" Y
if 1-6 = 7-12     13 is fake" Q2 l) W7 V0 E+ ~: Q
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if not ; \3 l% M+ O1 X
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Weight the 2 time
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& I) `# N8 _, H7 {3 vSuppose 1-6> 7-12
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% b" l1 g8 K# \6 k1-3 vs 4-6
7 o0 c, ]/ _2 `6 \: }
; |1 W; U4 M) AThen Weight the Third
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2 ?/ E- A" t: I0 RSuppose 4-6 > 1-3
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% `" w( z& L# i* a% zJust like the first Step$ m2 }  ^% u; u& {, D3 d8 G8 L

) w1 V$ p6 X( q# ^4 vs 5
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8 K2 o, A: _$ N( Fif 4=5 6 is the fake one
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  G6 r# S3 L/ T! |if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤6 \7 Q8 s- P/ i9 i" Z* S* z* ~/ B

; Y3 L2 R% q! {7 T3 R' uGroup A: 1,2,3,47 d* B' P& V" q: X2 J' t
Group B: 5,6,7,84 q4 F4 c* s/ T: x
Group C: 9,10,11,12
- w2 _9 [, [) k9 V  `! kGroup D: 13# l' Y# Z3 a8 I# M; ~3 V+ ^

4 r3 e" x* d5 t+ TRound 13 H' B- p5 z( j
Group A vs Group B
. W# W, W/ `, Y如A and B一樣, 即較輕一粒在Group C or D
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Round 2
1 k1 @# |; v( o5 Q2 ^1 L. e再在Group C拆成:
% ^8 Z1 h% g1 HGroup Ca: 9,10
% v6 v; H8 J+ H7 _' H' i- EGroup Cb: 11,12; `) j  n' }+ P$ `
然後再秤, 如一樣, 即13為較輕一粒.1 i( C* x, z( y# k
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如不同, 即較輕一組有一粒較輕波子在其中,
# V$ A4 [" p* n要再秤, Round 3, 之後便知答案.0 `, h4 O  X/ P+ Z6 J* }

8 B4 X2 D- _" Se.g. #1 假設10為較輕的一粒6 y3 o# h+ y# u- A* c3 v
Round 1
, ~1 |! g- o: ?) y+ M8 n  }1,2,3,4 vs 5,6,7,8 = equal7 b( o# u: p  q# n' B3 _) i
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Round 2
, k. [0 I7 K7 E# |5 o+ Q9,10 vs 11,12 = 9,10 < 11,12
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Round 32 p  T( [0 U4 \1 |: B6 o3 I% e+ d
9 vs 10 = 9 > 10) ^2 U; a' N7 U
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The answer is 10.
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e.g. #2 假設7為較輕的一粒+ v1 w1 D- K3 g  i: @' @' k
Round 1. A# P" A4 r8 C5 S
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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% a7 X4 Y" I  l; t$ K; ^9 h% A/ [6 _Round 2% Q5 @3 p+ ^9 I' }/ m
5,6 vs 7,8 = 5,6 > 7,8: z& S$ t" x( `1 T0 h* V
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Round 3; h" ^5 E; z: U* P
7 vs 8 = 7 < 8& t0 X+ ?* N* ~" a" b- R; f
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The answer is 7.+ P7 J. I, ~2 p+ _6 E" c
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e.g. #3 假設13為較輕的一粒
% K# j4 N: s% X% }4 S2 vRound 1. }9 V( D; U4 S& y
1,2,3,4 vs 5,6,7,8 = equal# S  `' Z9 x/ O: A# R

, y9 M8 n$ b; d( m. g: IRound 2
$ P% X( f% n, b3 j* X9,10 vs 11,12 = equal3 J: X! `7 I2 ^* ]5 Z5 l

) v, z. k3 l  L) D6 FNo Round 3
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The answer is 13.
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8 u4 i8 [7 B0 I; k唔知我答得正唔正確呢?!
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3 X) j/ X, U1 V[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:$ Z# ~4 e: b% A' S$ s1 {0 Y) d
1.
4 r+ ~" Y/ q7 F' q/ y1-6 vs 7-12) o5 Z5 T$ s. z! b: b/ ~- U8 E
if 1-6 = 7-12     13 is fake- y; l3 t6 s/ x& H- I3 D: I# E. A

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+ ^: h+ U0 j: F* t, q( [: U: f1 \
Weight the 2 time
% j( t% I' @% K/ E7 S7 O. R  m
9 \) F* x* v: ~0 w& P9 ~+ LSuppose 1-6> 7-12
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1-3 vs 4-6 0 k1 y+ X0 C, Q! v

" {1 F5 W7 ]0 AThen Weight the Third2 j7 V( X" D6 R% F0 e6 g
3.8 l+ e- b+ K0 W( a* S# Q$ F

" [) K" h6 X4 u4 e8 |- R- z/ ^Suppose 4-6 > 1-3
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4 j2 v3 [8 O' ?( kJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one " E1 n, E  Y  l) X) k! |* q+ m6 e
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if 4>5  4 is the fake one
1 v7 U% u+ [; E  `and so on......................

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3 e. C* o4 W* @$ \問題第二步7 t0 \  S9 v9 {3 Z$ A' g
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6; Q" V* ~; `1 ]
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你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12
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3 R1 Y6 c( r9 M$ W! S0 |Weight 2:  4-6 > 1-3 # ]$ x3 J. t+ j) b' n( r9 c

$ i5 q# ~' ?/ \9 D. H1 X0 l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