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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5 ?/ e7 _9 G" D/ K『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)。
) k% M! F8 ]4 p6 l3 O4 c4 \: x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:
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/ ^! K) |) o  e% e+ r& a% j1. 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, Y- g4 H3 }3 s) 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  , hide 字要連埋 , 內容 = 答案% i( A; f2 o9 k& I; v* k

  m- b* \( e. s[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
: q/ P( |& D" L% C" g% j: D相信e條題目都有吾少人玩...

, F+ S  k. w  [( Z3 p我以前畫左個chart去答,0 y) t( m1 y& a% g$ T
等我搵下仲在吾在; T4 n7 T6 A& ?; p
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
! i& i0 D" b0 B! i4 }13.........
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$ Q; e' o; p7 ?; u9 p0 m[ 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,) }* ^4 @! Q+ U: U# v7 Z0 p/ z
等我搵下...

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( V/ d+ W6 c. T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:
* f) W, R7 ^, y' D唔識隱藏...已經諗到..

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sor !!!....e加改左. E% O) j3 w  d+ d' g

  c" P0 `3 [# b2. 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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+ Q. p( v1 U1 T1 t) J[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
  ?2 l6 I. q1 i! w8 O- b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.: l+ \: B3 ~6 _3 p
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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2 R3 n% L' F5 HPlayPlay, Let me know later who has the right answer and I will add points accordingly.5 S5 T7 ]  k/ E- d
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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.
& L+ m6 I+ c$ E# o" {: {3 ^$ q1-6 vs 7-124 n; R0 D  t! m& _& L" e
if 1-6 = 7-12     13 is fake1 a7 R6 B- @; ~9 w1 d$ z' b& y

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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 - M3 q6 w- G/ g7 p$ Q  \7 g
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Then Weight the Third
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( [# h0 {4 ~9 ]( u; G* U  z5 c  oSuppose 4-6 > 1-3' N. `$ _8 d: [+ U+ K
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Just like the first Step
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8 f: x1 `1 c% \! ]4 U8 T, `4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one ! I1 o- h- p+ i

- g" F! d, V5 R/ p* V3 {$ T% rand so on......................

hello1997

分3組4隻波子秤& U4 L' I4 t" D% s% T

4 M" n' q4 c6 J) KGroup A: 1,2,3,4
5 h# ?4 x! b( P$ u2 _3 D, JGroup B: 5,6,7,8
8 K& T- H' }, A+ F2 V+ U& LGroup C: 9,10,11,12* J4 ]. V7 }4 ^) L  a3 n9 N
Group D: 13" k9 T5 J. f) c
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Round 1
! d  q; [# t  |& [5 }2 h+ vGroup A vs Group B$ r% z. s- R0 s  ]' Q
如A and B一樣, 即較輕一粒在Group C or D4 F1 u: I$ s4 C  d$ |
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Round 2
5 m3 T$ E9 d. p6 b1 C3 G: U再在Group C拆成:
  m- L( u9 t1 [: e  V, qGroup Ca: 9,10, y- [3 L! Y$ t) _+ o# I) U% l
Group Cb: 11,127 a9 c# s6 ?! ^$ z% u& q* Y
然後再秤, 如一樣, 即13為較輕一粒., D! E6 {, H: n! a

5 A+ v; c1 I1 g+ G1 w- V  Q- M% T如不同, 即較輕一組有一粒較輕波子在其中,
. Z9 w- x: Q$ B2 a要再秤, Round 3, 之後便知答案.$ T1 G- O( H( Q- m" r

" W( X' E/ S. D' }0 B0 we.g. #1 假設10為較輕的一粒
# H- H* |5 A3 O+ w2 zRound 1
4 I+ V4 G/ _$ ^! r7 U( e1,2,3,4 vs 5,6,7,8 = equal
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Round 2
! G% s# J% n* f1 E: a* i2 j9,10 vs 11,12 = 9,10 < 11,12
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" F5 d. Q; ?. o$ B$ _2 F2 rRound 3
2 ~  e# [0 i) D! l( k4 f6 A( i9 vs 10 = 9 > 109 W+ K$ v/ N+ O- D; m

/ T  ^* a8 _9 v- S5 \The answer is 10.* r' r" k* B3 A; V, Q$ b* _  H
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e.g. #2 假設7為較輕的一粒% k3 _5 k# N6 y  q$ L: |. A9 M
Round 1
) K3 x( K2 G9 v( d! L6 _1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& g# \4 B' S; ?* H9 W
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Round 2* i( X# M) H+ A& j! m
5,6 vs 7,8 = 5,6 > 7,8- B- G7 B3 S" z2 w) A+ X0 U
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Round 3
4 v/ E. A& K' G7 d. K7 s7 vs 8 = 7 < 8/ Y5 e# a$ p7 l5 P* b; u& U1 k

- y3 r9 d  j/ p" D0 DThe answer is 7.
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$ k3 w2 d0 A% R+ t$ Me.g. #3 假設13為較輕的一粒
/ S7 O6 |: G& X! K% d2 [- aRound 14 p; v1 T( ?- h% ]( u  f
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
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: a  _1 c, r! q! wNo Round 3
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% I, Z6 R' ~) [4 yThe answer is 13.& q* V; k  N4 i/ f/ b8 |

, `: g4 M4 Q* Y+ A唔知我答得正唔正確呢?! 5 _, o9 F6 R7 X7 a5 Z

5 H) U) v% t/ T1 [6 ^/ \' O[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:. i4 ~% V! y6 w  m" }9 h
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1-6 vs 7-12& V1 \; R* B. ]* d! \7 f* k
if 1-6 = 7-12     13 is fake
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" [. [" r2 K1 h; T" N6 }! Uif not
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9 e- {, P$ W& U% x5 Q4 XWeight the 2 time
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* b3 a0 g9 |! R1 V0 A& NSuppose 1-6> 7-12
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: `4 f, K1 ]1 i% P4 D1-3 vs 4-6
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Then Weight the Third. Y8 d6 c* X2 |5 w9 d. S# Q
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7 ?% m' S- I( [9 c$ TSuppose 4-6 > 1-3
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  E( v- L3 [5 ]# O/ J) m" T( WJust like the first Step0 K4 Q: t2 D5 u5 C+ a

- D& \, m' u; x$ D" Z4 vs 5
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0 u3 |" t. e1 u6 i' S6 Fif 4=5 6 is the fake one 8 W6 K6 ?; Y; n! g! @  i' d% v

9 M* [! x4 l+ L3 r- W6 V2 G7 q- u0 nif 4>5  4 is the fake one , a4 Y2 {6 m& N3 b
and so on......................

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問題第二步: n5 Z; Q. D# d* @# [0 d0 D5 [8 m

- z4 U) r" Q5 y# z7 }/ l- uWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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3 v$ O( n% K% Z, v9 D2 r你第三步点去搵 7-12 边一粒???! x' |$ I* P) g; S# G) V

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) R& b( v, D3 q* N# `& D' [: d5 L問題第三步
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* v* L# x+ ^7 d8 ]4 OWeight 1:  1-6> 7-126 l% F4 m. X# U; m( M% }

% W& i& w* @1 ~0 BWeight 2:  4-6 > 1-3
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! k6 H3 P9 ?* V. k3 L7 G5 e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