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+ ^& I1 R; l. g1 s& H- @

2 o8 U5 ?( a, @5 y( 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)。6 D8 c/ L4 r1 F* F+ y! t
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？』; f  W4 V; W* P4 Q5 I  q3 x% ~6 n. _

- j. x0 f6 w% S* L0 ]6 c注意:
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0 I' F6 e  p6 q3 z/ f7 ^' n$ }% j8 X1. 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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! [9 e  Z# n6 G; j) ^6 H, D$ K& N2. 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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9 W: \  ~, L6 V: I[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:4 I' e# i) c5 I" ^. l
相信e條題目都有吾少人玩...

4 S% _+ p( [' [9 c* {我以前畫左個chart去答,4 ~. r2 W! X% b$ [7 M, f+ h1 g
等我搵下仲在吾在/ ^/ ]( s" s/ B4 \7 X( G
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ T1 J1 y& h$ Y  t( L  b6 w13.........2 D' F5 H4 t! X$ ~. @

) H- K' s- K% e. ^* I" i6 ]7 @[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:% @: ~; B- s$ A9 U, |9 \
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我以前畫左個chart去答,
" {4 r) C) K8 W0 ^7 I. @5 k0 I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:3 \; j- D( C% W7 ?
唔識隱藏...已經諗到..

) _% O3 x3 T7 ^" Q3 q  g% ]$ K: h" i8 V6 K6 ?% I: Y
sor !!!....e加改左# _9 S* q. ?/ m& @$ _6 o, H9 m+ T; n
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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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  L! a/ B: @# H; E: P[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:- N$ h/ }* J) D
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.) v1 A: C# u, @1 E: {( g, ^
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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.
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Thanks

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$ o! }  V) X; n+ L3 a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 7-12
+ \* w  n! Z! u9 i* M2 ^if 1-6 = 7-12     13 is fake2 {! L8 P; Z) R

) _) j2 J, S) p( R% N2 sif not 3 q. P4 J5 d# Z5 K8 V: Y

: n! e4 h7 {. _9 b  fWeight the 2 time 9 B# b5 [; ?( h- \

. N& c6 q$ |& |$ w" j8 r7 x- u3 \$ hSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
7 J6 o0 U" o' y1 `7 z3.7 H, i2 W7 ?. e/ s$ q

4 o5 h7 ?- G- W9 M0 F+ v1 b$ vSuppose 4-6 > 1-3; j7 C7 L' C! X7 ^  @

. X$ E* _3 ^% P4 o8 d% R0 GJust like the first Step2 `6 V$ d/ E: \
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4 vs 5 3 {' _: l3 g: i8 u2 D" G7 ]

) m4 H# J+ h$ g5 A2 r! pif 4=5 6 is the fake one
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if 4>5  4 is the fake one , A. Z  p# u) R' h) m2 [
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and so on......................

hello1997

分3組4隻波子秤6 ^% {1 W% S( e/ X: b+ b3 @

0 h$ w  u$ ^# U) A+ A' R$ |Group A: 1,2,3,4
5 v: K$ j# f# v6 C2 b' E0 [7 s- AGroup B: 5,6,7,8
* x2 K: G) W% z, GGroup C: 9,10,11,12; `5 u9 q/ z5 s# ?! F8 A" R; P
Group D: 13
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Round 1& ~3 M* ^/ M) |7 \8 T7 k
Group A vs Group B
/ W% I" G% ]& l7 A- r! w如A and B一樣, 即較輕一粒在Group C or D, ]! N; j8 O/ h% j9 a" J- p

; G: ^( D* r1 ZRound 2
" i5 B+ U: g+ y* s; {: S; t0 @7 o. m再在Group C拆成:
, [  L# _& I" wGroup Ca: 9,10
% t& E) w- s& Y2 [Group Cb: 11,12
2 x, Z/ m1 \2 A& J/ e然後再秤, 如一樣, 即13為較輕一粒.0 G* y3 T0 B% A1 \% U* E+ a8 s

9 }/ R! h7 L8 @! a+ k! K% y  J如不同, 即較輕一組有一粒較輕波子在其中, " V" D" o# K5 b5 \7 {* G
要再秤, Round 3, 之後便知答案.7 i% b! |( k5 ]# i

8 o# o' d. l6 U' s2 B2 b- se.g. #1 假設10為較輕的一粒
  V, _! _. W" D7 J2 ]$ A: yRound 1
0 y) z' H, V! f& A, y5 L( ^1,2,3,4 vs 5,6,7,8 = equal7 {) y5 T4 a+ T+ Z/ i
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Round 2
3 ?/ N/ b5 @  F+ V% \9,10 vs 11,12 = 9,10 < 11,12
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  n4 k6 }; V2 HRound 3. J/ Q9 ]5 c/ [9 Q
9 vs 10 = 9 > 10
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4 Q$ K$ i6 H0 i: Z' _The answer is 10.
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3 s2 x  m! q2 Q" g' pe.g. #2 假設7為較輕的一粒
' g- K% x) L/ |/ g: z% U. LRound 1
, W6 z/ f2 w9 ~7 g! v1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
2 h( k" T* g* o) `6 _5 ?5 _2 G# r  J5,6 vs 7,8 = 5,6 > 7,8: \1 i1 H8 P8 V$ Q
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Round 3
) Y0 u+ X' t! C" {% D8 }. F1 E) w7 vs 8 = 7 < 8. b, W- f( g$ l# \9 g+ g2 _; ]/ q7 g

# E8 L8 M# S! }' KThe answer is 7.
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e.g. #3 假設13為較輕的一粒
, S  w. i( H1 c* W# f  N* e/ LRound 1# j5 c. C3 P7 l4 E; q- R
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( f7 p9 |2 Y5 }; g4 [7 [4 E$ N8 P7 {9,10 vs 11,12 = equal
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No Round 38 P+ \; G% T- _0 `0 d

) N# H3 A: K% T3 p+ LThe answer is 13./ S2 l8 m+ {1 I% B
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唔知我答得正唔正確呢?! 9 p9 e- ?, m6 r  `* z8 d
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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:2 t2 I: s: J- p; Y
1.
0 C8 c" f3 ?  G) o* h# _  N( b9 c* O1-6 vs 7-12
8 _5 ^3 J& S6 n  Zif 1-6 = 7-12     13 is fake7 [1 D2 s5 e3 b; i- k% Z

: T$ q# {: \( T7 v/ D/ B& y6 y! Kif not 9 `2 g' K8 C( u8 C

5 S8 v: S8 |) g- D: TWeight the 2 time & X; h+ A0 V/ N' @: W, `2 \

3 j' u! d# \# {" e+ s5 Y3 XSuppose 1-6> 7-127 t( Q6 g! b  [8 R$ Y4 O$ b
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1-3 vs 4-6
. M( B7 B) |5 b# ?: j) e: k# b) z9 n4 {) K& l  m5 @* {; }
Then Weight the Third
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Suppose 4-6 > 1-3
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% q  G$ K/ z  ?6 ?Just like the first Step( n' m$ _2 S# T9 \) k
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4 vs 5 ) P& Y+ q- I( R4 r
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if 4=5 6 is the fake one
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& s* Y4 H1 T  A! N/ uif 4>5  4 is the fake one / d9 c" F6 h7 i/ r
and so on......................

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7 f7 I, B. `. u7 ~
* k$ g, B8 L8 w- y0 c問題第二步
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! ^1 z8 U# }) M- L+ g$ }Weight 1:  1-6> 7-12
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7 C8 w; \1 @# [7 s# C7 ^( a- {Weight 2:  1-3 vs 4-6 , if 1-3 = 4-68 \1 k: D" g+ r8 T" e" B

8 F, Q( V* w9 }" @/ `你第三步点去搵 7-12 边一粒???
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========================================
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6 M# b) w6 w! n6 D; X問題第三步  L# O. \( W: _: y. U
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Weight 1:  1-6> 7-12" _' ?; a3 E" E; H+ L

! t+ N* n+ {4 L3 h/ m, YWeight 2:  4-6 > 1-3 8 V8 d4 u2 Y* L( ~
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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