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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, ?# r, h. h! |8 r# X2 c4 t『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 w+ s% F7 X8 ]) \  k9 B7 ~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 {* `* b% j9 f0 }0 `! X9 D) Q3 N
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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& j- h7 L" e& m$ f! {) ]! y7 v

  u( S  {1 K$ _  S2. 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 21:34:9 x- c& T" g3 x  t' ~% R
相信e條題目都有吾少人玩...

$ |0 c. `! t( N我以前畫左個chart去答,  w1 @; X* |; _  g
等我搵下仲在吾在( o8 D. F6 E5 N! R: d* N& o

- q( P+ Z! l! d當日用左37分鐘答１２粒波子，差７分鐘才合格。0 M% u9 ]+ Z6 R1 M
13.........) C) L/ ]( z- W. D% t/ \  h. Y* @

8 e7 C3 E4 m4 e$ 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:: o; g( v9 [* w9 n, w  h; ^

% U& c7 R& z( J. Y我以前畫左個chart去答,
6 F9 V9 T" ^) h& r# G等我搵下...

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* G$ O: n' N8 @! D. H) g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:; u8 r1 h' e! B, m$ I
唔識隱藏...已經諗到..

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sor !!!....e加改左! [; m: a! @3 w$ F1 w9 I; t" U% t

# t8 @8 F, v% a* n7 l2 h+ [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:
( B- `' x& ~/ E相信e條題目都有吾少人玩...

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% p5 O- w+ c$ M5 Q7 R$ ]/ K& ]: |8 N" iPlayPlay, 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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PlayPlay, Let me know later who has the right answer and I will add points accordingly.+ v/ t: G! H7 R/ d0 U

1 C9 I0 Q+ o+ x+ fThanks

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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

1.
4 P/ B' e  ^4 X# g5 {& _1-6 vs 7-12
- j% w; W8 k/ K5 t! t6 Lif 1-6 = 7-12     13 is fake' X; [7 R' @4 |: c

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Weight the 2 time
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Suppose 1-6> 7-12+ q. o( w3 Q2 J: s' C' c
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1-3 vs 4-6 5 A: l+ N) T" ~
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Then Weight the Third* B1 {; U5 K+ O' S9 Q
3.
+ ^5 g- f* a  l7 Q8 g) r1 ]. k7 t6 @- s8 ?; E" G/ q7 x& V4 m
Suppose 4-6 > 1-33 M; L4 y' P3 `7 n2 J6 F
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Just like the first Step
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4 A# O/ L' i5 @: o0 Z9 P5 U4 vs 5 : Q! @. {- @3 |; k5 f* V
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if 4=5 6 is the fake one ; ~( b6 C) p3 o: ?

& L. v" M' |) ^* K1 aif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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0 K- u& h* ]/ o* ^  P, EGroup A: 1,2,3,4
- V6 {$ u; {6 XGroup B: 5,6,7,8; Y; Q" c5 d9 I& y4 l/ _2 {
Group C: 9,10,11,12, V- G3 ^9 K$ w& N2 F
Group D: 13" w9 H2 v6 D7 @( E# v
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Round 1
& e. u$ p/ q1 m0 d/ kGroup A vs Group B: n% l. R0 j  _  k8 m/ [
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
1 B1 O1 b" d1 h; z3 \再在Group C拆成:$ l) v4 ?  ]' N( J9 D
Group Ca: 9,10
7 l2 O; C4 }  S3 p: }Group Cb: 11,123 J; A& j1 U5 n( E
然後再秤, 如一樣, 即13為較輕一粒.
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0 l5 K1 R, \. p$ Q如不同, 即較輕一組有一粒較輕波子在其中,
' A' ?  o9 s* \9 ]+ v/ `要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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Round 2
+ F; Q" Q& l9 M/ t9 {0 @" f9,10 vs 11,12 = 9,10 < 11,12
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9 vs 10 = 9 > 10. S6 R- g8 I7 X  m

' F0 F. S: A( _! G2 RThe answer is 10.
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9 y' v* [* U$ h) f5 l+ ?e.g. #2 假設7為較輕的一粒4 C; b3 {) @) W
Round 1+ x$ L( L# n' v) h" v
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 r3 P" i8 f8 f' y$ V
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Round 27 Z: Z% |8 R( Y4 u- a* @2 M; X1 V0 ~
5,6 vs 7,8 = 5,6 > 7,85 j+ n/ c3 ^7 G+ ?! ?/ Y
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Round 3
2 b: [# d& b2 z2 S% r7 vs 8 = 7 < 88 k$ G, l/ ^$ E7 F+ |) R# Q

" v- h5 c8 u/ f$ ?) F- S4 q' j# v# w3 aThe answer is 7.
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e.g. #3 假設13為較輕的一粒7 N' i) K; ?2 V3 [
Round 1
+ G( T$ |" J$ m1,2,3,4 vs 5,6,7,8 = equal
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Round 22 ]6 ^( E3 g) g  p
9,10 vs 11,12 = equal
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: h2 a/ U# C1 ^! I1 O) _No Round 30 P+ R/ q- S( ^" {  W5 k

! G- O3 M! Y/ F0 B; x; i% d5 RThe answer is 13.
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5 t" O$ g2 v# |- a) `; v( p唔知我答得正唔正確呢?!
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  X, g- d. n8 I[ 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
# x; }+ r- \$ G9 zif 1-6 = 7-12     13 is fake) `. \4 m: j" l
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if not + f4 K& y6 E$ n. Y( _
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Weight the 2 time
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, ~* Q5 N! T% c7 v+ oSuppose 1-6> 7-12
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1-3 vs 4-6 1 X  a2 c9 x9 P& M: C3 w( Z$ m

$ T4 K: {% U6 [6 z7 T4 H! VThen Weight the Third
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Suppose 4-6 > 1-3
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1 [6 _  }) ~2 F9 f) h& h: {1 u& NJust like the first Step4 x, R9 k3 h' t( \7 c. Y6 v0 {

$ d) `: c) z5 h4 Y6 d9 q+ m4 vs 5
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# n; i9 T: [* A/ k6 l! \# k/ qif 4=5 6 is the fake one $ u, b% A7 D* y: z  B

; G1 n7 E9 X6 W9 z- _0 P( Pif 4>5  4 is the fake one + f* [, d+ [8 O  ?: u
and so on......................

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* e; L& X  S! l問題第二步5 v' {0 y" y* T, y; N
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Weight 1:  1-6> 7-12
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4 h7 K& B8 d8 l% @" T, hWeight 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???
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========================================7 v- f: z# m; W" E. S

  H+ w( p5 M0 {: }3 \$ D問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 4 J# {0 r& G! U0 J+ }$ w

& R5 ?# s; O- R' K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