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)。
# U& Q2 Z8 B1 G6 `/ r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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) M. i+ s3 b6 d$ q$ x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
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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# R8 L2 n6 \- U0 L! ~  {1 ?
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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:
- J/ i$ x) r; ^7 b  S8 K相信e條題目都有吾少人玩...

* o+ r6 y7 W" a6 [# h' ~1 Y我以前畫左個chart去答,4 ~3 c/ F, T: P( b1 p
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。; R& F, X; J- _( Z/ G5 O9 d
13.........
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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:9 \9 R, e8 ?: ~. z) v
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我以前畫左個chart去答,% m0 Z3 Y6 }. n: I' ~( \9 @+ |
等我搵下...

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5 u3 c1 m' u/ z) s5 E# D: Y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:/ l1 ~) [1 N1 `7 z& v$ z$ d
唔識隱藏...已經諗到..

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sor !!!....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:
* @* h4 f2 _( k  W0 i  L相信e條題目都有吾少人玩...

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; \2 a2 d0 h: K0 [/ kPlayPlay, Let me know later who has the right answer and I will add points accordingly.8 R+ h! |$ c0 j+ p% D- u

( m6 d+ W6 h$ Q1 p  @/ E8 X6 `Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: H" f# s3 U& z- {$ q6 t# {
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.  r$ `! @8 w" T; W3 R) n
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Thanks

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6 m7 a: ~# ~& C! t& N1 p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 7-121 s2 }3 k) _% w: L
if 1-6 = 7-12     13 is fake
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3 N2 L0 G2 q6 }. G; nif not 4 a) ?, ]4 z; D# q* D

' C) z8 ^' x8 e1 t2 \' o3 _" w/ wWeight the 2 time ' l; K" G% ]$ Q5 i+ Y
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Suppose 1-6> 7-124 }; H4 I/ e0 [2 c  y

7 b7 w/ K7 R% @7 u( D1-3 vs 4-6
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4 Z. K! q) E) I+ h; g9 o8 ?5 c; m2 OThen Weight the Third
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8 o6 x* p9 z6 g! p$ E$ R/ R- l3 M; V5 C4 T/ @) r- J7 W% |
Suppose 4-6 > 1-3
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: S5 x  _2 i5 B/ C: u' s) t8 CJust like the first Step
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% F& h! S( t& K! f4 vs 5 " {" q' j: b" z  F# D: g2 `8 X, z

1 ?, J% w8 q% F! e& c) S# G- hif 4=5 6 is the fake one - m/ ?6 d7 X. a" g( X6 e
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if 4>5  4 is the fake one
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- \+ u. P* {: fand so on......................

hello1997

分3組4隻波子秤9 r4 E0 B2 ^' ^% t* f! r
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Group A: 1,2,3,4
' M' H+ E7 R4 JGroup B: 5,6,7,8
; X% D0 c2 K; TGroup C: 9,10,11,12
( G- g4 Z' j& h* ]0 k2 i5 ]5 OGroup D: 13- M" v2 i7 H+ g0 ]% w
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Round 1& x* p/ r; I# I; t8 d2 d$ @
Group A vs Group B7 j  f* c; n1 }
如A and B一樣, 即較輕一粒在Group C or D: o4 d3 n1 g! D4 {3 X
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Round 28 f+ c- l3 |1 \2 Y
再在Group C拆成:
9 C! D2 Q6 ~+ @Group Ca: 9,10
+ e  E7 y7 n  z  I7 ?# [9 DGroup Cb: 11,12
. ]' A1 K5 i8 Z/ ?然後再秤, 如一樣, 即13為較輕一粒., K  d, D; n7 B

0 E# \3 {7 I. a: m如不同, 即較輕一組有一粒較輕波子在其中, 5 H: n+ R( V. n: r
要再秤, Round 3, 之後便知答案.; y1 s3 a5 G+ @2 U% b- ?- v. @; X

  _3 V. [; s8 c  f1 P: [2 }7 ^& i/ ue.g. #1 假設10為較輕的一粒& |8 m% h/ l- I: s( [
Round 1
6 z+ j. n, d) v  |. U# `/ \4 l) z1,2,3,4 vs 5,6,7,8 = equal
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! e, V& }! x; @; t4 HRound 2) Y# j9 O4 m7 }" W
9,10 vs 11,12 = 9,10 < 11,12
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& a' \/ S" I- {% b6 tRound 33 G1 g: y) h. U2 H* ]" k
9 vs 10 = 9 > 10
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The answer is 10.
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! [3 ]' m  i/ qe.g. #2 假設7為較輕的一粒7 O7 T' \8 L/ b5 J; m
Round 1
0 m1 `8 u* f5 v; `0 ^1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, o( r# D6 G! \- s, ]& f# g% t
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Round 25 [4 y7 t  x, I6 I
5,6 vs 7,8 = 5,6 > 7,8  ~9 k) w; B5 H4 k- h# z
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Round 3
. B' s% j# w8 v7 vs 8 = 7 < 8
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The answer is 7.* ?- N( l- V3 H# ^; x
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e.g. #3 假設13為較輕的一粒
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; e. q# K) Z3 I+ H" H1,2,3,4 vs 5,6,7,8 = equal
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7 o! x4 U5 b% L0 K: C- w4 IRound 2, Q& J6 Q' B) C- m' g
9,10 vs 11,12 = equal" `3 \! z4 t  ]6 D5 |  J0 {
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No Round 31 N' g$ x6 `* U. |9 e6 h
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The answer is 13.' P! ^9 _& _3 V4 W! D9 u; g4 d
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唔知我答得正唔正確呢?! * e& D2 j. l; s, s" W4 F9 v' t

- M! S1 V! x1 H: P& u3 K( p[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:$ ~/ [  K: k+ a8 s* @" }  @' Y
1.
5 o" l0 k) y" `; b: ?1-6 vs 7-12
0 t3 P7 ^; ^0 i' xif 1-6 = 7-12     13 is fake6 O3 _- P/ c. X- P

( C" N3 V$ ]/ oif not
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Weight the 2 time 4 V3 H6 [5 T7 k; \9 Y/ T6 q

8 c, r+ T6 O7 N2 ^6 ]8 wSuppose 1-6> 7-12
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1-3 vs 4-6 6 e. G/ E5 ~. ?. M: b5 z

) l# T. n2 t! X# H# ]( c8 yThen Weight the Third
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  M+ P9 Q$ I+ U7 A1 W( E% n6 q/ Z0 y: M! w1 ^7 F6 c6 f. \
Suppose 4-6 > 1-3
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Just like the first Step
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. c8 P5 X3 J" [4 i0 ?( W9 G) h4 vs 5 " L0 I9 [: l+ j5 C
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if 4=5 6 is the fake one , Y& ]2 g) h; y- o
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if 4>5  4 is the fake one . O$ L+ p1 B, C2 K6 H2 P+ I
and so on......................

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, c7 ~7 [5 F0 c5 t問題第二步
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) _9 n! z1 \  `% B7 E! nWeight 1:  1-6> 7-12. {8 h/ Z/ g2 w# n- u) T
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6. {5 U& a# o( B: ]: ], H) w
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你第三步点去搵 7-12 边一粒???% v1 T8 x; ?  V; B% a$ p
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========================================
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問題第三步
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Weight 2:  4-6 > 1-3 ! R  z/ ^% F1 X* Q

" k) o( w% A" D1 T6 C3 E3 y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