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)。0 X' K9 `$ w: X' M; e
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？』" ]) D4 C( O- J5 i4 m" q
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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1 _( x' T6 [1 M: H' L

/ G7 Z2 f$ s9 P8 W) o2 e2. 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. o' o' Y* A$ J/ ~! ~% j9 i/ W5 b
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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:! x0 o8 |. U9 R( A( u
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,! v8 l0 x1 c$ F  E5 r  }* h8 p
等我搵下仲在吾在5 W  @) |! k0 X: O

& Y* b5 f7 Q1 V7 S7 f# x5 K當日用左37分鐘答１２粒波子，差７分鐘才合格。* w$ l/ L7 X! d" s6 X* e% u1 W3 [9 Z
13.........6 o& T7 W; u  ~9 L: r) k0 O/ e

& C2 {* F% D4 R6 Q- X% |9 ^% n[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:; v9 j: v% K( C$ e$ S7 Q6 o8 `

1 E% T$ v  E1 n6 K6 u1 Q$ ?$ _9 ?我以前畫左個chart去答,
& z( z% k9 Q* X% ?) a0 U! D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:
. P& H$ |2 x9 D- n9 f" ~: V唔識隱藏...已經諗到..

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6 m9 j' Z  s2 ^- v- a; X6 P8 F. Usor !!!....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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' O4 R9 K4 j: z" w# `8 J4 w  \8 n. R[ 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! c. ^  Q0 ?, E( n& X
相信e條題目都有吾少人玩...

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) ^$ y$ ?; x5 @8 [0 OPlayPlay, Let me know later who has the right answer and I will add points accordingly.2 X) T+ P1 Z; d3 a& Y' e0 Y7 I. m
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:$ s6 k: v# a7 [2 }( K7 V4 w0 r4 U3 y# f
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) H: \( ?2 B$ e; {/ [PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) o8 h% m1 t* X; ~% e6 eThanks

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, f. _4 t  o$ Z4 Y  E: x4 O/ u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
9 W0 E4 O9 e" Xif 1-6 = 7-12     13 is fake7 {$ t, r' S% ]6 y3 a$ N7 z

* b" N4 k) \9 f, T6 r- D9 l2 Pif not
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Weight the 2 time
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Suppose 1-6> 7-12% ?/ Y9 f5 z  j2 K$ f
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1-3 vs 4-6
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Then Weight the Third
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- a$ j; j* Q9 W4 o9 gSuppose 4-6 > 1-3
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Just like the first Step
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/ f; h* ?0 C: D5 Zif 4=5 6 is the fake one
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& B! B5 P  D, `" L. Z, mif 4>5  4 is the fake one / {; O" P: u. y' |% z7 Q
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and so on......................

hello1997

分3組4隻波子秤- A( }6 F# M+ g/ S1 z
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Group A: 1,2,3,4
" w1 Q9 e8 \- Z/ |8 d. M  F4 k, Z4 fGroup B: 5,6,7,83 ^2 |* k4 P, A
Group C: 9,10,11,12
9 j- y" f+ Q, u2 {9 n1 P$ `  zGroup D: 13
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Round 1
( [( Y$ `: c( l6 {# @4 A- a" eGroup A vs Group B$ ~8 S: o/ W* ^( `7 m4 e
如A and B一樣, 即較輕一粒在Group C or D4 [+ a/ D( @  U+ X, x

' M/ B. t& W; YRound 27 I+ E& ]3 Y/ @+ j1 b' K3 x
再在Group C拆成:! q3 N3 U  ], Z6 W! L+ d1 k
Group Ca: 9,106 P, n* j! U- r2 e' ^: n
Group Cb: 11,12- ^9 a+ p6 w3 A% d9 ^* p( D% u7 F# x
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
2 o* j$ g+ ^* c6 t% d' B0 K要再秤, Round 3, 之後便知答案." t, u( X+ I' n' `7 V
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e.g. #1 假設10為較輕的一粒
9 F3 o: B  }  Z+ h- L8 W' VRound 1& i7 `# ^+ v! B. j7 D4 u
1,2,3,4 vs 5,6,7,8 = equal
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Round 2/ ]& G* _/ x3 t5 c5 p; p/ e2 F
9,10 vs 11,12 = 9,10 < 11,12
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Round 3) v! H0 l* O* f' r$ |# k6 T
9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
( h# r' u; q$ D0 q2 e$ e5 pRound 1
: h' a8 Q2 _  ~, h1 a1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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& R6 x5 S. g! z( MRound 2
1 Z: o3 f. d# L3 F( v5,6 vs 7,8 = 5,6 > 7,8
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Round 3
8 p8 p2 l  I; W/ r- j4 j( C9 u4 N7 vs 8 = 7 < 8- o( J# Q& @9 d. l" b% r9 i# k1 n: E
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The answer is 7.
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e.g. #3 假設13為較輕的一粒2 X3 c- d9 s  p. J8 s( c' c( a: K
Round 1  b# r# `0 Y* x1 B; A# L
1,2,3,4 vs 5,6,7,8 = equal* h9 u6 J6 V5 I4 y7 K: f4 o: y9 G  S
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Round 2$ K( |( q1 T3 i* N/ m
9,10 vs 11,12 = equal) _) h7 A# i3 k. ^2 n
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No Round 3
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The answer is 13.
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$ O3 m6 c& {3 x+ ^% r) M唔知我答得正唔正確呢?! 0 z1 \3 t" {! Q9 L' N

! ]3 T7 t) m- d) h[ 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 7-125 P9 [) q1 w: Z) B+ H) C( M0 Y! h& Q4 d
if 1-6 = 7-12     13 is fake* R7 [! q0 N: a2 D
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if not & x( w5 q2 M3 {

7 c& c( p/ p1 f: _3 s+ x. ~: aWeight the 2 time . m! W% f9 f/ P

( |* @, R% M1 e5 O6 F5 GSuppose 1-6> 7-12* z* ~2 W; A0 @3 D
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1-3 vs 4-6 4 j2 e0 w" \% A7 z$ I

0 P* A* a- Q9 T( u" P0 k  TThen Weight the Third
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6 C& Z1 `. t- F: `& u+ B& QSuppose 4-6 > 1-3
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0 `% c1 y/ d+ o  tJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one + C; h. b- I+ G& H
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if 4>5  4 is the fake one
, B! ~$ Y) J  e0 Dand so on......................

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問題第二步& s" O( S, B) A, S& c$ S

. Y1 b% O3 x  R7 p/ x3 vWeight 1:  1-6> 7-127 p3 `0 ?; ]2 N

" T8 a& C& N( _  P2 M& D- oWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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* G8 a/ t, t! \! T# B8 N你第三步点去搵 7-12 边一粒???
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% N$ Z2 ^  Q- [% z3 ~% G, q, o! R' p問題第三步
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Weight 1:  1-6> 7-12; }5 [  ~, p* B
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Weight 2:  4-6 > 1-3 - e3 ?) ^1 t  a5 h( E# f9 L

& h/ G9 d( @1 p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