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  h2 J6 n3 @% F

9 ^+ b$ C$ y' ~) \0 a『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)。
+ Y$ M0 A3 b5 T  p) A: c! ^; ~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: / I5 c, r( M+ j* f9 a

2 r" U& y% A1 x+ o/ y1. 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6 O; z# e7 Y$ l: O4 @

, F. a3 K) M2 N% O# 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( k* H% L/ ^" ^, i
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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:
. p% ]- V/ d* `$ B相信e條題目都有吾少人玩...

7 R5 P: D& S( U7 K8 m% q% R我以前畫左個chart去答,
3 m4 ?2 P# R& e等我搵下仲在吾在
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/ ^  e; O! j* f  h當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 x4 I! V& N7 z7 r; C  Z13.........
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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:$ y8 y9 O! x# x

/ f* [, v. S) ~( Y我以前畫左個chart去答,% n9 ]( V! T& O
等我搵下...

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+ s' g3 S( N8 b. o* W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:
! L3 {% m; J# I$ S: y/ V9 t$ k. l唔識隱藏...已經諗到..

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7 {2 o. ]$ x8 D+ @$ Usor !!!....e加改左4 z1 D8 x* d" _- [1 |5 \, H

& u; w$ a0 O. v0 [3 v% a3 o2. 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' K$ i; y! a[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:- W- C6 v: g8 L. u8 l. Z
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:, ~" G# ]6 z* {& i1 v& t1 Q
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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6 B' A$ C6 d" B0 L; ?( e' h3 BThanks

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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.
3 `. j9 M6 y0 Y0 q; R1-6 vs 7-120 g0 s+ ^( s- _' d
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6   T" p( h1 h. p
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Then Weight the Third
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+ U: t$ P: G/ j. YSuppose 4-6 > 1-3. e1 `! W# E; f$ U2 l& w

. d/ K. T- u, T: v6 A% V7 F6 _- SJust like the first Step
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; y+ o# s' E; B2 n- S4 vs 5 8 @  A9 Z: G- U! r$ Q  P
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if 4=5 6 is the fake one
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3 Q* h: q# V$ F# l6 v" \if 4>5  4 is the fake one 4 X; i5 }/ p- V, m% A1 w
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and so on......................

hello1997

分3組4隻波子秤& p$ J* b. j4 \  N
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Group A: 1,2,3,4! j) H9 o3 P' K
Group B: 5,6,7,8
' v9 r8 ]( D1 k, @& f" ^Group C: 9,10,11,12
! d4 v4 W' v4 s0 d. l6 {8 nGroup D: 13& _1 w, @; ^, Z3 |# ^
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Round 1* `1 W+ s" O. h+ t9 y% p% A0 W
Group A vs Group B  {) M2 i' K1 V
如A and B一樣, 即較輕一粒在Group C or D+ t# i# Q" Q& c  ^) K4 r
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Round 2
2 y) O% s  h9 f再在Group C拆成:
6 _: P8 g- P; w$ eGroup Ca: 9,10
. j6 N. Q1 W: t8 ?Group Cb: 11,12! A6 K0 J4 M3 b' Y2 D: s
然後再秤, 如一樣, 即13為較輕一粒.
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  l/ a, I$ Z0 @" G$ }如不同, 即較輕一組有一粒較輕波子在其中,
& q* b% C: ^3 B1 ?要再秤, Round 3, 之後便知答案., r* z+ y. w9 \9 Y, k% Q4 c

! \; @0 `2 D2 u3 O* _6 Q) O: re.g. #1 假設10為較輕的一粒
5 H! |6 a; k& W. Z! W5 ~) d5 x8 CRound 1
" i+ U6 I0 \" B: ]4 ?. t5 Q0 t6 c' B9 U1,2,3,4 vs 5,6,7,8 = equal7 ]8 [$ s, f- w. g6 {. B
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Round 21 |' c* |0 }3 s  N6 X
9,10 vs 11,12 = 9,10 < 11,12- V8 ?" J' {2 J

6 C6 @. H- x+ Q$ rRound 3
; [6 J/ V4 ~% y9 `6 e. }9 vs 10 = 9 > 10  q) @2 i8 i( P

% B" e& r9 p  v  p1 KThe answer is 10.# O& e" O1 C) x! i+ U
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e.g. #2 假設7為較輕的一粒8 r3 c; I+ h2 w" b4 E- t  r1 H
Round 1
1 c7 t( j& u9 N1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,82 K; \: \( ^0 g2 A2 o
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Round 2$ c0 O% _/ h) R* w
5,6 vs 7,8 = 5,6 > 7,8
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Round 3, Y) _, E& H$ F2 l( {+ l, _! y
7 vs 8 = 7 < 8
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6 ?8 V0 y' O9 G3 A) KThe answer is 7.
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e.g. #3 假設13為較輕的一粒
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# S* [0 L9 G* m) H( r6 B4 W1,2,3,4 vs 5,6,7,8 = equal. M& y# ]4 j8 w2 ?8 H  W- W

) K" ^' ]% z7 ^. t6 VRound 2
) I& K7 x& S) b% e9,10 vs 11,12 = equal  E9 \4 S8 s; j3 i

5 T6 V0 e" K- uNo Round 3+ U" k% a6 ~( g/ s% b( A
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The answer is 13.
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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:' t: T! K& @3 s
1.
( }6 f+ l0 F6 g- e: ^6 p1-6 vs 7-12( }9 Z- Q) v& z8 h
if 1-6 = 7-12     13 is fake
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7 ]7 Y/ M% o: R5 _6 }3 t( IWeight the 2 time
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Suppose 1-6> 7-12; |) B! F: S5 P/ |# l
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1-3 vs 4-6   o8 z3 `, B+ n& q) Y! b& }3 L$ R: f1 G
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Then Weight the Third
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8 _' G; g3 \3 O! [/ `Suppose 4-6 > 1-3) R) s$ F4 Y$ s, ], i; S3 x

' T$ x7 V! w% c- N! c2 uJust like the first Step
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3 E: V6 Z1 D, {4 }" p9 r4 vs 5
3 O$ w, p9 @2 S5 S, w' V4 u& H, `2 x1 x2 K# V* ^5 U9 S( q
if 4=5 6 is the fake one 1 R' q" k4 [' K
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if 4>5  4 is the fake one
4 V) r2 w$ t' _1 A+ q- n" X( x% [2 cand so on......................

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1 ]" Z( e  E( e$ \0 [" Y問題第二步# E5 v3 ^) E5 \6 }3 V0 j1 E8 I
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Weight 1:  1-6> 7-124 ]7 k2 e8 ~. R/ e3 ^3 \5 y) E$ g7 _

3 g* ]* W! x4 t( `; L4 `$ A$ J# xWeight 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???" p! \, x9 n; x6 @! s
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========================================
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3 ?3 K# ]) b) @4 I% B問題第三步
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/ y5 R) V9 a7 _1 m% X( }8 |- w# [Weight 1:  1-6> 7-12" y" Q2 f! y8 _* z+ ?# z

, l/ U# t4 T1 R  t, }& hWeight 2:  4-6 > 1-3 + _( [# B2 m/ w  Q

' ~, l$ L1 O2 m& y& l! D* v' R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