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. Y' a6 F" S7 H* A0 {8 E7 a( t& k$ X

; W. K8 \9 w5 L& A0 D" Q1 ~『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)。
' G. H. s  J* O4 f7 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？』0 b5 g& }5 S. @* c! p
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注意: - e. [) g0 C# G1 a  L3 a- `
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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8 V& l/ x0 Z0 Q4 C
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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:
; k  D5 u" L9 \2 p5 u) L1 b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,7 g) G, D7 y) X" T) x5 w+ ~
等我搵下仲在吾在9 z, A& k* x: j9 x$ h  K
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 C6 N5 u  W% w- u5 i0 e13.........
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* N& ?- A& K- \  J. ~[ 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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% u; e, A5 ^0 _1 r我以前畫左個chart去答,
/ \+ N( v1 Y/ s6 Z$ Q9 ]8 f6 h$ y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:( D: k% |% M' ]- I: H
唔識隱藏...已經諗到..

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% ]$ d/ L1 u0 L+ r3 G: rsor !!!....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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
3 @) o  ~) |! u3 Z7 o/ }' `7 N3 m相信e條題目都有吾少人玩...

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" h' ~4 J. W- e: ^- j/ Q5 T" DPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) Z, I+ R3 n, [3 c; gThanks

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.7 C( |% T0 T/ _) D

) k- m2 S/ i1 d& N4 zThanks

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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.
0 A1 e. Z8 x; j8 \2 K3 h6 P% J0 t1-6 vs 7-12+ I7 h. y$ a2 b
if 1-6 = 7-12     13 is fake1 q. A1 S, f1 H) J" R) y' o
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if not 9 y* {0 s5 f% Q" D

- [& @) T, q- S9 ]* ^2 D) ~Weight the 2 time 0 t( k: |, a7 F2 c7 L9 @
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Suppose 1-6> 7-12; ^" Y$ d3 ~( y( _, w, D
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1-3 vs 4-6 # P$ m, D6 g5 ^) L+ R
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Then Weight the Third
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Suppose 4-6 > 1-35 P0 o' U( ~# I$ `/ V

3 S# W. T" X2 B+ @/ n3 \! UJust like the first Step8 |; d1 Q' L9 |

9 a$ K( B! K& m- G+ `5 T4 vs 5 3 _* `( Y# l$ O* X" Z3 C% U
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if 4=5 6 is the fake one
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& c* t5 G. r5 yif 4>5  4 is the fake one . T7 H0 x4 Q  T6 a# J& R

7 g! b+ Z, S. M# t8 Vand so on......................

hello1997

分3組4隻波子秤
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$ M3 m9 [7 c6 A- u2 sGroup A: 1,2,3,4
) ?; G2 r+ ^6 T5 Z1 |7 V: iGroup B: 5,6,7,84 |) T8 W: A" V1 ~* r+ X. c
Group C: 9,10,11,12( b# K3 I- E! F( k. m9 P
Group D: 13
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5 P6 g7 R5 [) ^Round 1
4 w( C% t4 x9 N7 X, Y" I. yGroup A vs Group B3 q2 v4 K% d# m& @; H3 d
如A and B一樣, 即較輕一粒在Group C or D! N  I7 _: ?" q  v' f6 [
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Round 2
9 I' D! H8 b; G4 l5 {) [再在Group C拆成:9 R4 ]; q- w$ _
Group Ca: 9,10
6 G# r. [8 u- @, v) R5 X) mGroup Cb: 11,12+ F5 m6 K- b/ M! d  x1 `
然後再秤, 如一樣, 即13為較輕一粒.
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/ i) F& C" \+ v5 A如不同, 即較輕一組有一粒較輕波子在其中,
& u. W" Z2 `% V' P3 z要再秤, Round 3, 之後便知答案.
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& v( M- `& p- R9 O& U$ ~e.g. #1 假設10為較輕的一粒
1 M, G* Q: R/ Q0 Q) g: G1 ~2 P8 nRound 1
  X6 Q1 H1 n. ^1,2,3,4 vs 5,6,7,8 = equal
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! v% P7 v2 b6 e; _, I: @+ aRound 2
8 f; p6 E/ }. \$ `9,10 vs 11,12 = 9,10 < 11,12
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Round 3
8 f$ G, F4 {6 {2 x! j  L& z9 vs 10 = 9 > 10( D7 a8 a) w: V3 P
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,82 Q. a5 t1 R" @) L; a
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Round 2* x/ J4 D$ v# b+ `
5,6 vs 7,8 = 5,6 > 7,8
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/ T% b+ Z3 X* N5 a; q' eRound 3
5 j! z3 K3 f# o3 @8 e" h0 T7 vs 8 = 7 < 8
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6 x$ e  l9 s% o+ S3 z; H* l/ n, jThe answer is 7.; L# U% c" z# N. @/ q

" Z& }2 F' b2 a' r& C! de.g. #3 假設13為較輕的一粒
/ ~+ u- C) S- Z  w5 eRound 18 ]& K: P2 p$ q; s" M/ O
1,2,3,4 vs 5,6,7,8 = equal
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Round 2( ~2 \1 M# w$ b
9,10 vs 11,12 = equal
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6 s5 h6 C7 y8 D" dNo Round 3
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4 ~7 |, P5 F4 m2 w7 yThe answer is 13.! B6 I0 }% K7 F3 D/ O5 ~. I
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唔知我答得正唔正確呢?! 7 `* z$ L. p0 o3 a; M# \
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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:" k8 s) c. f! n! Z
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1-6 vs 7-12
* E0 ?  T4 B4 w) i$ k$ Gif 1-6 = 7-12     13 is fake
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3 k% w& U* u- kWeight the 2 time
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) B' t" L: R) i& lSuppose 1-6> 7-12" A' V* ]+ r9 g* G5 [! c

" o+ I2 c$ a( a7 w8 v1-3 vs 4-6
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Then Weight the Third' V* V+ p. u# d+ g% e+ A" c
3.
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Suppose 4-6 > 1-37 `, F  z. C; F: w/ o9 i
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Just like the first Step
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1 }6 e* P% C9 F4 vs 5 ! I8 R- ^) ?! f& o) A  L
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if 4=5 6 is the fake one
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1 Z2 K& I7 {* T' d/ _% j# \( q6 c, pif 4>5  4 is the fake one , l& b' K/ G/ x  m( X# c
and so on......................

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# W2 @+ M6 F; f/ a2 z. C& Q" ?問題第二步) P, u) m6 r% c# Z) z
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Weight 1:  1-6> 7-12- N0 w6 i% y0 w( @, H7 v% Z

; r( t* w& M, |+ K2 zWeight 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???% c4 q7 ?( n: ?
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問題第三步
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Weight 1:  1-6> 7-12
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4 z5 \5 y, ~* f1 s4 E+ dWeight 2:  4-6 > 1-3 0 q: S# V" ]- z8 i* u# \# j5 ~
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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