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0 Z- J0 p- B8 o. y1 t/ T9 O  |
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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)。
' q. _& ^  @) i# t4 ]9 }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: + _# q5 c2 D# G4 m/ z

- a4 y3 [! }) L8 z' q5 }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. T3 F# U1 r+ z3 o
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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:
% y! B8 [" |" Z" d, U# N) w! T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,
3 F* u2 s* a8 Z) C4 H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。
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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,
+ N0 n$ R- q/ G3 H6 I- u等我搵下...

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5 [  U; U; L) ?9 H: R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:" o* Y  B+ x  m
唔識隱藏...已經諗到..

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7 q$ Y" Q+ n/ ]. Q5 csor !!!....e加改左* J  G  V0 M1 c9 @3 ^
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
9 W; m9 p; L1 Y2 p: }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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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  ?( X: A1 `4 w% F6 dPlayPlay, Let me know later who has the right answer and I will add points accordingly.; [" U& a' Z+ s

7 k# q" }& h  E( I, X- nThanks

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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 7-123 C  R" V6 `+ X( J# o
if 1-6 = 7-12     13 is fake* }; S& u/ n$ U
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if not
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Weight the 2 time 6 s( ?5 F$ o: {5 f5 Y  _7 z% S
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Suppose 1-6> 7-12: C  G9 B4 x' w; ]5 Y
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1-3 vs 4-6
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( c2 m0 d$ O; c, t# QThen Weight the Third
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- R% ^& [; p) o. N/ PSuppose 4-6 > 1-3" u8 @3 w9 d* h. A! b; ?, N

6 f' b; O- e+ i; dJust like the first Step
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4 vs 5 - S" N9 y1 z1 z5 T/ s

3 t( a4 a" b. b- Aif 4=5 6 is the fake one ( T+ i( H1 E- m

' s3 Z  o. w' F4 H: I: Jif 4>5  4 is the fake one . Q5 l, ~! g# x2 |$ q! U4 M+ K  G4 @1 b

: B" D8 s9 U0 K: P+ Rand so on......................

hello1997

分3組4隻波子秤' F! h! t8 F4 ?0 D/ h; j" W. {0 D& b

" o/ J! t5 w% HGroup A: 1,2,3,4
9 K0 k* L: ~( D8 \Group B: 5,6,7,8
. d2 _! ~4 ^( y' L) yGroup C: 9,10,11,12
# ]7 T( D# Z. e  G3 iGroup D: 13, d, L3 u  [# y! k
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Round 1
% @; t# f  T# W8 K9 wGroup A vs Group B
- _* \6 z/ |& D8 Z4 |如A and B一樣, 即較輕一粒在Group C or D( d/ ]5 W# T7 n7 R) L  k# {
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Round 2
+ q: h* x* j7 D: z& u% F1 S再在Group C拆成:
' N- \" p- t& i" p5 ^5 gGroup Ca: 9,10( l- L- R- o, _  Y7 `/ a
Group Cb: 11,12
- R4 S; {8 u6 B2 e* j& p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,
: G7 z7 ]; `/ A1 Q3 |要再秤, Round 3, 之後便知答案./ O; ~% I4 t$ l: v+ U6 W

3 }# }; Z! d6 ^' @# w% Ne.g. #1 假設10為較輕的一粒4 \) z. H& V) h" G  O
Round 1
: [8 b1 B, U* i5 e1,2,3,4 vs 5,6,7,8 = equal  R( i' \: ]+ z
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Round 2
6 a9 z; C2 a. i9,10 vs 11,12 = 9,10 < 11,12% m& M- w7 y: `: h& R6 N' @9 ?

. \+ @# U# q8 R" v& z2 uRound 3) g- D0 t2 Q! q' b3 y' |7 T
9 vs 10 = 9 > 10
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4 M: Y! _9 B( ]) q" g. u. J& E* MThe answer is 10.
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4 E' U$ G0 J: }1 Le.g. #2 假設7為較輕的一粒
3 p1 T: \/ v, f5 h( u1 G! iRound 1+ i' q) c. M: c9 ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2: U, _% Q) I' N* S( z
5,6 vs 7,8 = 5,6 > 7,84 t, `$ w: @7 F* ~# \( g9 O% e% l$ g

) e' p( s, b. y9 yRound 3# h; w- I+ D+ k- S" O6 e6 Q
7 vs 8 = 7 < 8
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The answer is 7.
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+ R, G. u/ R* r' }e.g. #3 假設13為較輕的一粒
* a$ P, h! a4 D/ t2 F& P0 sRound 1
- a: n5 x9 F  L+ C4 s1,2,3,4 vs 5,6,7,8 = equal- `2 v7 p! H1 \8 r

* g( U; o1 y% P% n) z; ?# [1 s" gRound 21 Y7 |8 q) s1 _, z1 l  d; O
9,10 vs 11,12 = equal
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No Round 3- z: }1 ]9 h6 m2 j. G  x' E

9 j6 G5 T2 h7 V9 [The answer is 13.) Y( e% z. u, p  S$ a

( k  l3 M* i8 G4 q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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1-6 vs 7-12
3 G3 v9 Q' f  m+ M; [if 1-6 = 7-12     13 is fake! T( p0 a0 l7 {! s. k$ ?5 p; C

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9 q5 O# [- L. w( Z1 I5 V# AWeight the 2 time " M4 l+ f- w1 J7 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$ I7 K6 G& x: A" ]
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Suppose 4-6 > 1-3) i) d( J& x/ |8 L" v
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Just like the first Step/ O$ g2 q) A0 V7 B+ W' p% b
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4 vs 5
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if 4=5 6 is the fake one
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& k4 Q% @, ?0 s6 W- Kif 4>5  4 is the fake one 5 P' }+ F. J% a" Q+ ]% E* e
and so on......................

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問題第二步* y9 q$ Z! C" J& W; g
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Weight 1:  1-6> 7-12
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/ }# d2 I! P! gWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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) g9 l/ ]( Y, _4 M1 _" e0 a5 R你第三步点去搵 7-12 边一粒???
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========================================
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( `) a' J8 N9 P# d' A問題第三步
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Weight 1:  1-6> 7-12
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$ @, O1 x9 P/ @Weight 2:  4-6 > 1-3
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+ i, S/ r/ m% D$ O9 K) 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