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)。
8 _* A( r) k( t0 H5 ]" z* [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？』% h; F, i2 i9 b& |9 Q' k

1 F5 q+ S, ]2 x3 _* y/ }2 [' R  ?+ a注意: $ D+ Q( L! W  `+ i7 V  a; B
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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
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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+ W+ E: K2 s+ X7 U$ r

% G& T  I$ X- t! p9 i[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:) c7 C  [9 m+ c& `; E
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,: g; a% B& G' J( P( [
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
! `# Y# c" x/ {5 x1 P3 s3 C6 ?/ o& A13.........
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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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. N+ y! l8 @8 @1 i& r我以前畫左個chart去答,) y" E# r1 o" s( `- W
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:8 g* O& B' f7 G  U; {
唔識隱藏...已經諗到..

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4 e. B4 X6 A" O+ u/ A! v3 D- usor !!!....e加改左& Z( z$ N3 ~3 m4 I
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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" k1 O" F$ Q1 f5 O

. q$ U" k5 h) }' 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:
+ b: P5 s: g- N" c相信e條題目都有吾少人玩...

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* |. p, M9 |& z3 n2 b0 w, a4 nPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 }2 E# R% f4 d/ i) y$ k

* n3 n2 k) G, |/ MThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:0 w. l3 L8 ?' f) M9 F- F8 R

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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, g) G" ?9 T0 `9 y+ {不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
8 W4 u/ \+ k* p, m$ O: V5 g- Z1-6 vs 7-12* p0 m, H0 m/ A! S6 z
if 1-6 = 7-12     13 is fake. D( O0 ?+ D# A, X( ]: j
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if not
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( O( j; F9 r: ~0 BWeight the 2 time
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- R* B+ m& S- P2 U9 e- `Suppose 1-6> 7-12
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$ x3 Z: y  w1 }1 E$ ]1-3 vs 4-6
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- O) O% _# `% M& U6 C; v1 cThen Weight the Third6 b- O9 U2 W! S& @
3.
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Suppose 4-6 > 1-3
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# h0 i) N( [* o; G& sJust like the first Step
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4 vs 5 6 o: X$ d6 v5 o/ F+ l% k
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 5 v2 z2 i+ C2 {" {7 p7 {: u

& Y9 p0 X+ m% Gand so on......................

hello1997

分3組4隻波子秤5 }( x; p+ N4 F- ^1 @( @

$ o! \; N4 P5 M! Y# k6 l1 rGroup A: 1,2,3,48 t( {3 V3 G6 Q; P7 J& X! i
Group B: 5,6,7,8& i( G+ A. [) g$ G* U& Y
Group C: 9,10,11,124 w$ q) x. f$ X) r" @, K1 o
Group D: 13
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) H0 B( s+ S: k0 [$ _Round 1
& c6 g+ ~- \  |" q% g+ J2 ], cGroup A vs Group B( b8 A! c  K3 N. ]. P5 b
如A and B一樣, 即較輕一粒在Group C or D
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* J- N# t  z6 iRound 2
" U* w; R  K0 i3 U6 N: s7 M再在Group C拆成:8 N( T/ k( ]% i# Q
Group Ca: 9,10
& x$ ?; m) a: YGroup Cb: 11,126 M- L& ~) @" {9 M- Q0 j
然後再秤, 如一樣, 即13為較輕一粒.2 M9 e) L% e; U

& s8 v" O* u' y6 S$ H如不同, 即較輕一組有一粒較輕波子在其中,
* x% P' c( {/ T$ k# {1 g要再秤, Round 3, 之後便知答案.
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+ w& B" x8 h! G: |% me.g. #1 假設10為較輕的一粒, F) ?6 g) _! w( |" O* ]9 Q1 a
Round 1
( V6 ^$ \  ?: R4 v0 b1,2,3,4 vs 5,6,7,8 = equal0 L- E0 b1 B  o
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Round 2
" Q/ j# ^5 s( C9,10 vs 11,12 = 9,10 < 11,12- k" I% \" R' D! ]0 I. i& Y
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Round 3* l; U+ N: A( r# z
9 vs 10 = 9 > 10
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' W$ m; t; e# dThe answer is 10.
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e.g. #2 假設7為較輕的一粒: P5 }0 J. F% H8 d! a+ H
Round 1
( h2 P, [" E1 i7 n1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
9 j) T% P9 U9 X* U5,6 vs 7,8 = 5,6 > 7,8
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7 g/ @. Z9 p, x& p  B# W, d0 MRound 3
3 M! X% l% M( r9 i: R  L7 vs 8 = 7 < 8
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1 _0 n8 M6 \8 [3 r( N6 {+ Q. nThe answer is 7.
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e.g. #3 假設13為較輕的一粒: o0 g) _7 ?! ~+ S
Round 1; G7 }; x& i1 f
1,2,3,4 vs 5,6,7,8 = equal
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. x+ f7 ~/ w0 n% v$ g6 ]( bRound 2
/ a& j$ V- F# O7 E; p( ?  r' M9,10 vs 11,12 = equal( M0 ?3 \, v) Z4 v5 e" s2 K
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No Round 3- n9 N$ ~6 e  M* P1 r7 b3 a7 j7 f5 D

8 s+ P3 J% H% N3 ?The answer is 13.
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) T+ m/ R1 s$ i0 y+ F' }. a3 ~唔知我答得正唔正確呢?!
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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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0 I+ ^) m( k, [2 H# C1-6 vs 7-12
, r$ ]3 B" f' y( I  _$ mif 1-6 = 7-12     13 is fake
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if not * I+ w" @& f" j+ V3 r+ `% o
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Weight the 2 time
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Suppose 1-6> 7-128 D3 o2 I8 n8 V+ r0 h6 T

$ }2 Q: ^2 N; ]1-3 vs 4-6
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6 ^& `  G6 U7 n' r" r7 Z3 a' mThen Weight the Third
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Suppose 4-6 > 1-3& I* {; F0 y+ Z/ d7 B

, C( y" Z- D' ^- F& d: hJust like the first Step
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4 vs 5
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& z4 Z$ s2 b% x' x7 A9 yif 4=5 6 is the fake one
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if 4>5  4 is the fake one
$ M$ ]/ F' ?0 N, F  |( x, |and so on......................

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問題第二步
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3 S# ~9 K& _; n7 \1 m: W1 oWeight 1:  1-6> 7-129 Q  l$ F1 |+ s' T
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6. d2 y7 @1 [7 y+ e2 F
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你第三步点去搵 7-12 边一粒???1 ?- P: B8 m* o5 W' j
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9 C# M9 d& S* g問題第三步) c9 I$ @7 Z- U. v* c4 F
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Weight 1:  1-6> 7-12% |( b/ e" v4 r& s: S5 n

2 [! X9 C9 U! U+ O6 ?Weight 2:  4-6 > 1-3 9 T& d0 ?" Y# {+ _, a" v
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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