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)。
6 q0 B3 o0 b8 Z! s) o' y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？』5 x7 u8 `- y, d9 i9 b

- O, W. \+ J. T' s: n7 _$ M注意: & u' ]/ @2 [$ p0 j2 N2 g7 n$ e

. K. E( h! L5 M+ m+ D1. 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
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+ v1 u) T8 F& R: O4 W[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:9 V; s" R3 s: f% L* k$ q" m
相信e條題目都有吾少人玩...

& |# G# W; d# F: o2 v我以前畫左個chart去答,! z. I$ r% C' L' {1 R! G( f" B2 y
等我搵下仲在吾在. f7 n4 z( m4 D, Z, H

" C5 p% F0 \, l當日用左37分鐘答１２粒波子，差７分鐘才合格。* y7 w) g& h! v; j, O
13.........
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8 C1 X3 s) V- H: W7 @[ 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,
' V6 j5 b8 s# ~等我搵下...

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5 _) B1 }0 Y% F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:1 ~( L  g7 u3 [/ N4 d9 J  @2 g" z
唔識隱藏...已經諗到..

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sor !!!....e加改左
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: `5 m3 g$ W" F( }& T2. 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9 W; n) z/ O, H8 W: w4 y6 G$ K4 C

( u. ^; I4 r" g; I2 X5 Z0 C[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: |' u6 m4 n) R
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.. Q2 s3 w0 P9 O& B4 R6 u' T
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:* e; V3 @% n2 c# F  e

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' ]; d* Q$ {6 w# h8 E5 FPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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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.
: _* m& r; R: v. v9 ~! E: A  `1-6 vs 7-12. I: _" p: j& z
if 1-6 = 7-12     13 is fake& R& M- s; I: B! l, o9 z

; g5 M5 T% M4 ~if not
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& a+ m. o! {2 X4 y) ^- w/ [Weight the 2 time
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, U4 d' u; Z2 dSuppose 1-6> 7-12
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* P9 i. F, h( v5 |. j1-3 vs 4-6 : G  @1 @1 K. }& d9 N
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Then Weight the Third
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+ ~7 j- a9 ]6 x8 N. A- CSuppose 4-6 > 1-3
$ ~1 a5 |" R! `" I, m9 c# ^
8 h1 U5 W3 m$ wJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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9 W6 p# ^7 J1 G- `if 4>5  4 is the fake one ' g0 w% ^8 G0 `" K

/ n; I  Z1 G* {and so on......................

hello1997

分3組4隻波子秤  |% Z* |( I7 i) e$ C0 t% a

* U3 s" v' @+ oGroup A: 1,2,3,4! c0 |; l- w7 Z' X
Group B: 5,6,7,8
3 @: Y" u. u+ P; X5 _9 ZGroup C: 9,10,11,12: o: z; ?" r6 u
Group D: 13) v  o4 B2 w9 y, i1 X
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Round 1
+ \& M; n+ ~: g& I( T9 [Group A vs Group B
/ ?5 x9 ^* D$ d. T; ?4 f如A and B一樣, 即較輕一粒在Group C or D
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Round 29 ~. G. Y0 K8 d0 M) J' y2 \
再在Group C拆成:
- {) J! a, Z6 {9 I( i3 {Group Ca: 9,10
8 b# t1 {, E4 N. q/ E. q+ R* d0 rGroup Cb: 11,12
, G5 X9 ~8 ]0 I/ Z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,
& w) W( X6 N3 f+ U/ l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1 x6 h+ S+ E; K4 H% z: ^
Round 1
1 f4 P, g5 {( ?  G+ v2 I0 y- x1,2,3,4 vs 5,6,7,8 = equal
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Round 2
2 Q$ Y$ t' l' p4 Z0 z9,10 vs 11,12 = 9,10 < 11,121 @- j4 T4 u. v+ y# @/ J9 d& ]! g
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Round 3
: Y* C4 h+ m1 o& B) J9 vs 10 = 9 > 10
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The answer is 10.. j- J/ Q3 [: y5 `! x& D. f: o. K
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e.g. #2 假設7為較輕的一粒' ~, l9 b% s! P1 D
Round 19 j* ^% _9 R& G
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2% z9 t! f! A7 F, x1 R, J+ n
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
' w! G% k& ^. ^2 W7 vs 8 = 7 < 8
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6 L; J0 }- a  s- [The answer is 7.. y# ^2 O4 a2 E9 f3 i& X
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e.g. #3 假設13為較輕的一粒3 F, [0 ~) K' C2 g8 u
Round 1* _8 ?8 x# k; g1 a% k" C) J1 A
1,2,3,4 vs 5,6,7,8 = equal
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Round 22 a3 \+ I' }# |' C) \* V" g
9,10 vs 11,12 = equal; u* P' W! D; Z8 _: i
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No Round 3( p; W" ^  ?8 C, D+ y
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The answer is 13.
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- W' J  c7 z% }$ l( L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
0 [0 k, L1 @/ U" o2 ]: e* l# uif 1-6 = 7-12     13 is fake" i# h" ~# C" I  ]! J
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if not 2 g- s  Z, \7 J4 G+ M7 u& t; I

+ w( ?/ V/ ^/ T9 }6 zWeight the 2 time 1 s$ `. [, ?7 |2 R& L
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Suppose 1-6> 7-128 \- g4 i' r$ ]! ~1 S

* I) [7 P6 m/ x. r1 g1-3 vs 4-6 . E! s' P4 W' {9 D1 ]
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Then Weight the Third
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4 a4 w6 p- b- d5 a
) Z$ M% o0 S' _" NSuppose 4-6 > 1-3- Q( L4 e6 \1 Y/ M6 ^, h

/ |/ v3 N2 j( V+ T  C; a5 aJust like the first Step
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0 {9 p  {1 v3 `4 vs 5 ) M) {7 \- b% J+ l3 I/ u
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if 4=5 6 is the fake one ! i6 A% }4 ?7 Y) A: Z5 Z
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if 4>5  4 is the fake one - m) j  Y3 q( ^6 W6 J1 f# {
and so on......................

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$ i& n9 M0 f9 P' M+ K5 ~6 G6 Y問題第二步
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Weight 1:  1-6> 7-122 R- \; Z5 w0 h3 H/ a  O

! \! ~0 G: C7 ^. uWeight 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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========================================
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; [+ }6 G$ T1 I7 {問題第三步6 E1 R. i, K# F: L) n

' Y* V! u  b) CWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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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