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5 \9 C+ B4 C2 {/ k5 J

5 \6 ]. K0 @# M  j+ y9 i" x  B4 e- L5 K『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 M0 \3 w: u( C! ^$ j9 {
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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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8 i# E( o' z  p

5 y. i# ^7 ?8 h( 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  , hide 字要連埋 , 內容 = 答案
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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:' U3 F- `. g+ L- F( l5 q# H' ^
相信e條題目都有吾少人玩...

+ n. ]$ r0 H0 b& V: a- t  c我以前畫左個chart去答,% l. A: u; s5 d0 W( Z
等我搵下仲在吾在
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2 i8 s- L% {0 M; q當日用左37分鐘答１２粒波子，差７分鐘才合格。
8 |. \. g5 n3 L( @6 `. p) N: y13.........1 I- W  _9 S& u  v/ S/ \4 Y4 A: |# K
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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:/ S) [* @) f' I

' Y; ?+ |& a- r我以前畫左個chart去答,
. y1 M; }$ p, ?* m" ^等我搵下...

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  e8 X* d3 X0 Y  \- _* I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$ T! ~) V5 Y& K! J! H唔識隱藏...已經諗到..

+ H, A: P, w8 }$ i$ B! O, y+ a  s7 n  `: a3 o& [* O& E3 u$ t2 j
sor !!!....e加改左- f% r7 _, I7 f4 M8 T. R9 }( Z

% w/ p, P" r3 S. {6 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
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9 p( o- N% F" g! O0 s4 V, T4 D1 B+ P[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:/ c/ r% N2 d9 i
相信e條題目都有吾少人玩...

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" N) H9 U; h) I% u% WPlayPlay, Let me know later who has the right answer and I will add points accordingly.( L5 A2 r2 [) J) n4 q1 S3 z
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& h" B; t' N1 y6 O8 E1 h) g( a/ X

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! H7 u$ b; G, M% a% i& kPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

  o( h& B; `7 O& O, x7 b! ?6 I/ M9 @- K& }. n& ]. G: j
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
6 O/ j9 `( E% u, ^: S: x8 h2 s  V% kif 1-6 = 7-12     13 is fake  o* B' e9 C# \5 ^* d1 b
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if not
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Weight the 2 time 1 k" \( t9 i& M3 Q' H6 F1 D( R
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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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  k, r+ r0 F) m, B; l# g! RSuppose 4-6 > 1-3/ e* j7 s+ _% H

, L8 M  W# q4 [5 j: N# z( {2 tJust like the first Step' ~$ x( D  e  Z
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4 vs 5 ( v. v2 Y$ r. K9 }

# L  z1 E$ F& x! R" q0 E0 @8 T$ Mif 4=5 6 is the fake one
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if 4>5  4 is the fake one ( Y, U. q  T6 U- K4 ?$ y2 R5 j: W

+ R/ b2 ]5 R" ]and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4) m& y& t" r( U, j
Group B: 5,6,7,8
  q- ^8 |& G" D5 P/ W5 |Group C: 9,10,11,126 [1 y6 z5 {- y0 \; S: D) `9 y  L
Group D: 13
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  r  P+ s0 b' R+ o, k, VRound 1  H- m+ A: x) m+ y
Group A vs Group B, @! L! j+ H  D1 d' {" v
如A and B一樣, 即較輕一粒在Group C or D) Q" X' F/ j& D. H: `

8 V/ S; L( Q+ M: R$ d, W: rRound 2
. [( E# ~1 Z3 z" F1 m& \再在Group C拆成:2 c' _' D3 e( @+ w- Z8 }. x
Group Ca: 9,10
* @0 w5 V% h" u# `1 r6 fGroup Cb: 11,12
4 k1 C* C% ~) @5 _- A- N然後再秤, 如一樣, 即13為較輕一粒.
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' V& b# N% o% X6 w1 z0 @$ z" p如不同, 即較輕一組有一粒較輕波子在其中, - }3 A" y- I% P, X$ \
要再秤, Round 3, 之後便知答案.
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" V- Z* ]3 |4 q/ `2 J0 Ye.g. #1 假設10為較輕的一粒
( o+ U) w2 B+ A( f3 h- h9 I0 IRound 1
1 |4 f6 U2 ?& h2 W) I# Q1,2,3,4 vs 5,6,7,8 = equal7 t4 l( c: u' W% |; V
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Round 2: O, Z5 E5 f3 ?% I6 @: I8 Y9 v
9,10 vs 11,12 = 9,10 < 11,12
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: q3 K/ o, y) c8 Q/ V1 u3 K# r- h, xRound 3' ]2 `; b) ~- n1 l( n: |
9 vs 10 = 9 > 10# E9 I; w  P1 H: c  t5 n5 ~3 ~$ z
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The answer is 10.% \% v8 t; M; b( A/ E! M0 x
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e.g. #2 假設7為較輕的一粒0 |' l7 T, f3 G0 f/ s. i
Round 1
) r' `! D: Y. a! k5 P7 o1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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* k3 y) w# i/ u: o4 hRound 2) Q& Z( l  `+ H$ q; m
5,6 vs 7,8 = 5,6 > 7,8& E9 W5 Z8 @3 v" X) H6 A7 y
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Round 3$ t* c8 S8 \/ M8 S
7 vs 8 = 7 < 8
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The answer is 7.  a3 N! z( B/ P) h" l) Q! F
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e.g. #3 假設13為較輕的一粒4 Z( R5 v" a7 U3 q6 h; v  \
Round 1
5 ?* X4 r  o; `* F1,2,3,4 vs 5,6,7,8 = equal
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# b4 D4 z$ v6 J3 ]0 R' H9 t" f" w- t' ]Round 2( f  G$ ]" i, |' d: F) [8 w
9,10 vs 11,12 = equal
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% O5 {* J% d8 p. p% m5 PNo Round 3
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The answer is 13.
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; v$ u. `2 Z3 s唔知我答得正唔正確呢?!
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9 J# f: E5 [  s, g& f3 O[ 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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, @. q4 `% C& o2 ]& p7 V. F; a5 u1-6 vs 7-12
" ~) |: H4 n! N( E2 t6 |, \- xif 1-6 = 7-12     13 is fake% h. M9 ?  w' m9 e( g( q+ d, k/ ^: g
0 Y  }& M/ K/ u$ u* ~" f
if not 7 W! y' \/ P( b: K1 T5 Q$ V0 d
/ J5 [* x9 C! h5 {) M$ V+ _6 d
Weight the 2 time / T. x0 h2 T  F
. X  |. Z  g8 n
Suppose 1-6> 7-12
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) I- ]7 c8 _. E  j$ x/ H5 |1-3 vs 4-6
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# M# Y; t8 l7 p5 pThen Weight the Third2 }$ z. y  I- X, U+ `; J
3./ a+ m" p8 z7 D, r$ H3 M5 t
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Suppose 4-6 > 1-3
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9 T. o9 L% R- K/ t: g6 z. oJust like the first Step, n% z. Q$ D/ |- n1 j7 S
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4 vs 5 8 g/ ~6 a/ l5 P$ `; Y+ d
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if 4=5 6 is the fake one
7 U8 F* i% z: s$ q4 ~) o# X* z% n5 P' o& z5 n
if 4>5  4 is the fake one
+ Y, m7 t8 |, r5 }% M/ _. pand so on......................

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2 n) k3 T, G4 y4 S, c+ {8 B/ N7 K1 D% P6 }0 p
問題第二步/ [- c* `, u" C& _* }
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Weight 1:  1-6> 7-126 r3 m* d# e! r  \6 c3 U7 b
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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! V, P3 y$ Q6 \0 t0 F你第三步点去搵 7-12 边一粒???
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========================================! z* d: e' ?% d$ P

0 o, F" G, ?1 ?% n問題第三步/ p9 p- E% x! N
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Weight 1:  1-6> 7-12
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, O0 ^( h! ]# eWeight 2:  4-6 > 1-3 0 v& R+ W0 R# v% W& k" s

" ?9 H+ f+ x4 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