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* C2 u0 }8 g7 J& S  H$ ~, f0 `

; @4 Z( x' f% K3 D* H" M% r' q『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)。
2 l5 V( i+ Z# ]- ]& M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？』, ^8 @) \$ u9 H% ^' \1 F* j

" `( }" X. d! [- r4 z9 j7 S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/ A0 N# c3 l: q4 f2 i) Z
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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) g3 x0 p6 A( W2 B2 P% L! N
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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:
; x1 ^& k* T2 ~4 O4 s8 w2 M$ L* O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,
5 j0 i& ]! ]! v7 z6 I, p) `# f等我搵下仲在吾在# O3 e) L: F) g6 y- }: W& ]

2 D; f/ p/ k5 |! ~當日用左37分鐘答１２粒波子，差７分鐘才合格。
4 ^+ r' U1 B- Q13........., i: X; n; T) C6 F

' d* P' `. D* o& w. d[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:/ e6 r8 w6 w0 a" D" l  }
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我以前畫左個chart去答,
3 q. t# f; G) K/ T: p( q' p; W) 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:2 l" ?* x9 ]2 u. G; R
唔識隱藏...已經諗到..

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sor !!!....e加改左+ ?9 h4 ?5 H* ?( e2 S" U5 [

" t) `* ^+ a$ }# y% |+ s# j3 q- 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# V; J  N: r% W4 ^" V
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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:! g/ L1 q7 B; e4 k
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.
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9 x' p7 n# K2 B, D5 vThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% B- M( ]2 t' i* a
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6 h7 h$ s% ?. j9 vPlayPlay, Let me know later who has the right answer and I will add points accordingly.& ]: u& ]: h! [% d1 ^

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# O) V9 }6 J. p( u4 ^$ l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
7 y% \4 S) R. N' J/ {if 1-6 = 7-12     13 is fake
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Weight the 2 time
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; S) e; ?$ G0 k. o2 |6 {( {' \9 jSuppose 1-6> 7-129 i7 S( @1 H( F) v8 t. A; X

+ j1 b# e8 G+ ]% C, o) y0 ~1-3 vs 4-6 . R0 a+ t3 P) u6 y" g" `5 n
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Then Weight the Third
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Suppose 4-6 > 1-3# E! L# Q, X+ R

$ U( Y+ i$ T8 x4 QJust like the first Step7 X* ~; G/ f2 t7 K/ _) l

& X2 P- A$ |! h* g/ ^4 vs 5 4 u3 P- \; ]# Z* [" F. M8 X
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one / `8 Q1 K6 f# H; Q0 R

; t' A6 M2 C7 fand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,49 G5 z4 D1 m* |, m! ~) ?
Group B: 5,6,7,8! T* F: G# _" A$ ~( n% b
Group C: 9,10,11,12/ g( f- t2 W6 @1 h
Group D: 13  s& E- t/ O* Y& I. W& z+ O* g# Y

' E, \% B* ]# y; w( T; iRound 14 L( P# ]' E& D# \# R; i
Group A vs Group B
! {9 \; W! V; E如A and B一樣, 即較輕一粒在Group C or D7 X" s+ l; v0 S1 w0 O( z: A8 F
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Round 2
+ h9 y4 x' M  j( k0 Z: g再在Group C拆成:4 H! c. D) J0 e2 s
Group Ca: 9,10" X5 v% w3 `& Q: I  q. p
Group Cb: 11,12
4 w* b' D) Z* _/ T; V, |; R然後再秤, 如一樣, 即13為較輕一粒.5 ]2 O- [. I( {" |( d, m! x+ X
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如不同, 即較輕一組有一粒較輕波子在其中,
0 _% q' z0 G6 Z  [1 z( W9 l- X要再秤, Round 3, 之後便知答案.
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. v  Q7 P: @8 d9 Ce.g. #1 假設10為較輕的一粒
; H+ x8 w2 z. ?' L& z4 A) w3 WRound 1( A6 I4 A6 }) d/ O5 j
1,2,3,4 vs 5,6,7,8 = equal
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8 s7 g, L' u9 Z* d$ g7 w: B4 d% A8 F9 hRound 2
/ z6 e0 n8 n7 {3 K) ]9,10 vs 11,12 = 9,10 < 11,12
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9 vs 10 = 9 > 10
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The answer is 10.
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# @5 d8 H* _. l/ A5 g1 p7 ge.g. #2 假設7為較輕的一粒7 I" R% w3 B. u- j- Y/ e2 p; z
Round 1
% C& G+ c8 o: R3 v, K- y& @5 X0 K1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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2 J2 ]- d9 T# I" pRound 26 C/ X1 T1 n. o1 A& D3 \7 [0 m, u8 u
5,6 vs 7,8 = 5,6 > 7,8
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( G' }' o- w, F. s$ k* hRound 33 t$ X! b# g$ |% L
7 vs 8 = 7 < 8/ O/ F0 U9 J( s; S2 x

% r8 l0 |" I* SThe answer is 7.
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9 m) f3 i0 ]' r/ p/ L; u0 v& u0 Je.g. #3 假設13為較輕的一粒
, B, F, Q+ q" G3 i" m3 u- [Round 1" c* X7 n2 ~  N  h* A& N
1,2,3,4 vs 5,6,7,8 = equal% X1 A; e+ h- W
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Round 2
, u* z# d/ _0 h! q1 I9,10 vs 11,12 = equal, {$ E5 G6 r/ C3 Z
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No Round 3
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3 |5 |/ E5 b$ @: RThe answer is 13.
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唔知我答得正唔正確呢?!
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9 G% f0 D9 q7 I/ U, F0 w3 \) e[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:) Q# y3 ]+ b& E9 O* X
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1-6 vs 7-124 u; Y. m2 x; k9 c. ^
if 1-6 = 7-12     13 is fake( M$ y/ U- e  N% P2 B( t  [

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Weight the 2 time
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$ h2 P0 n* V9 l0 CSuppose 1-6> 7-12$ ~4 T+ f* h& ]  a' P" h

, o5 H5 o  f7 \1-3 vs 4-6
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Then Weight the Third% A6 P  w! B/ J% ~, d. ~
3.5 g& c* G, O" w% t& L+ U: T

: |3 _$ |. H- A  f$ ?9 eSuppose 4-6 > 1-3
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# f* g/ ?$ w& t6 W( I& \Just like the first Step
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4 vs 5 - a- @0 n/ Y9 C) d

. b% i3 u4 G+ z1 \+ cif 4=5 6 is the fake one 7 u9 _9 f( E# b% a* k: E
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if 4>5  4 is the fake one
8 {1 Z9 H7 I( `/ D' R1 Z6 {- }and so on......................

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問題第二步
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Weight 1:  1-6> 7-121 J4 G6 `1 F4 z/ ?' r7 J% d

7 x0 |$ c2 v* m1 _Weight 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???, U4 n& ^" Z" ?: j% T

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3 k! r' v% f8 s1 D$ `! e: k7 Q問題第三步
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3 Y9 I$ W6 I( K6 |5 ]  yWeight 1:  1-6> 7-12
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' X, m: O* j; h. y4 h" iWeight 2:  4-6 > 1-3 9 [% q) a. ^- _6 X, h

. h; [6 B7 m3 \! Z: }- G  J  ]. r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