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' K0 ~' L# B: q- a& m

; x9 d5 B6 A. d& ^『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)。
2 s; ?2 n) i- u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？』7 q0 g+ H/ l; c- @0 q# P

* I3 x; t( x! a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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; f3 s7 H. Y4 x+ ]8 J2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
) o9 l8 t  c4 a) \% y9 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,5 g' w3 ?; ~2 h, E0 i
等我搵下仲在吾在
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3 e5 _. U0 C/ Z3 y) w. t當日用左37分鐘答１２粒波子，差７分鐘才合格。
: X# c$ R/ R  ~& B/ Y: b3 C13.........+ Q; e& G- P: K5 k( _

6 \1 i1 d# c) |7 ^  I# }' B[ 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,
* u* j! h9 b; |7 `8 K$ z: u2 o等我搵下...

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8 w# l: K  @( F# c7 ~% d' h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:
) V% i& D+ N! ?1 Q/ u唔識隱藏...已經諗到..

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sor !!!....e加改左
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# @5 J: p( W# U4 S: v; \4 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
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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:
  C8 ~: p0 M0 N& [3 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.6 Z2 Z) [$ t0 y

0 }0 g9 r9 _7 yThanks

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.3 V. e' Z' i; C' R" q% r

. j% w- }1 j9 {/ x" [# LThanks

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' S1 h8 \3 d/ P- m7 G/ V0 D4 L! X不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
& k. g- |9 ?, K, E$ u2 ^1-6 vs 7-12' ?  q2 C' Z6 ]# Z
if 1-6 = 7-12     13 is fake) N6 Z- X8 u8 f/ F) y4 _! i
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if not
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Weight the 2 time ! m, M$ \7 ~: m  m4 u' O4 U
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Suppose 1-6> 7-12& a0 W. S: L* M5 D8 a, X
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1-3 vs 4-6 : Q: X" j* @9 N" S

& q6 }; `/ N0 Z0 T' ?' x" U8 X! ?Then Weight the Third! |. y1 [8 e9 }
3.2 L. o* d% p6 `. F. f
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Suppose 4-6 > 1-3" _. @( q& ?5 b1 s4 q

( F- j, c% [+ T: g) b3 P- r2 ZJust like the first Step" `$ r% ^7 \" Y4 n

. p: _5 Y+ p5 F& R4 vs 5 # H5 D+ u  }4 H2 F
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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0 c( g  _+ |6 E0 |: r/ T# Yand so on......................

hello1997

分3組4隻波子秤- _% s9 i; z. b2 j
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Group A: 1,2,3,4
6 N6 J5 }3 ^, Q" j8 a* ~5 IGroup B: 5,6,7,84 Z* \" Q: c% T( ~+ p( \
Group C: 9,10,11,12  y4 l$ e4 b9 o/ f& f
Group D: 13
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/ h3 v- d7 O6 ]5 G7 e* \Round 16 @0 B- N% t! V1 L
Group A vs Group B
0 d( N* z0 }8 O, [5 U2 |2 j4 d1 A如A and B一樣, 即較輕一粒在Group C or D
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Round 2" o" e. I6 W9 B8 x0 c
再在Group C拆成:
$ p4 ?' `' ?( C0 p3 P' B- kGroup Ca: 9,10
* v9 F: C: a: ~  K2 |Group Cb: 11,12
. H1 q9 N! d7 e4 q( e. ?然後再秤, 如一樣, 即13為較輕一粒.) K6 I+ }4 e: Q5 W1 _

. k- ?" u5 ?  I9 a8 a如不同, 即較輕一組有一粒較輕波子在其中,
/ _3 b; `+ j2 u( Z要再秤, Round 3, 之後便知答案.; J, Z8 Z+ Z8 U; z" \) r
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e.g. #1 假設10為較輕的一粒+ |0 R( |8 w) E. y3 N% L
Round 11 @# y3 Y1 ?1 K
1,2,3,4 vs 5,6,7,8 = equal! a) u+ k/ _0 Z7 _# w

; M, ^) B1 E2 v6 wRound 2' p% p( b4 \# R4 |2 S" ^4 v
9,10 vs 11,12 = 9,10 < 11,12  S" g! ~2 D& o) A* x$ r
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Round 39 P$ ^* s8 t$ w! ~0 f6 D" K: z
9 vs 10 = 9 > 10
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- H6 {( c( {  qThe answer is 10./ Q" o, f9 Q; k* z

2 `4 k$ G9 [% C; ?5 u% E. ]5 ]e.g. #2 假設7為較輕的一粒8 ?# f- ?4 T' I
Round 14 b6 x+ Z  O1 F
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
, l0 q  O! u& F+ f1 X) }" X5,6 vs 7,8 = 5,6 > 7,8
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; p! @: W$ f) f7 F1 ^+ \3 aRound 3+ @# Y" g* K1 F5 H3 `
7 vs 8 = 7 < 8! w8 L8 g, {. d6 [, A
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The answer is 7.4 i: A0 T7 q4 G: p

+ e1 O0 _/ l3 l; a  U# s! z9 z7 n  je.g. #3 假設13為較輕的一粒4 g5 F. P8 [  }; O: M
Round 1
2 n2 I0 T5 o& }. l8 u  i1,2,3,4 vs 5,6,7,8 = equal( G# Z; V% H0 t. q

, @% O7 y& a, e, i6 B* @# pRound 2
  i* j; N8 w( s9 _, d9,10 vs 11,12 = equal3 ~3 v2 Q/ q& \* z% t

& u8 W4 J+ Y$ k/ L" X# _% QNo Round 3+ L6 A7 h  h% \) o* p6 f6 }# }
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The answer is 13.# ^7 g: q/ `* J; I0 @5 B: a
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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:
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1-6 vs 7-120 E1 a6 y4 |( z6 G
if 1-6 = 7-12     13 is fake; n9 z; B0 _5 o6 N6 p1 m3 u

5 K8 m0 Z% X9 U% s& [if not
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; l7 U8 w' @# [5 V1 N2 `( p+ PWeight the 2 time 1 z7 f1 m7 R# O/ l/ T0 Y( o3 C4 l

" i1 W+ r) z, f- v! |( [$ h8 y! j  CSuppose 1-6> 7-12/ F. C$ @6 W% A: V$ X8 @

) G4 l) r4 K& d  F1-3 vs 4-6 1 V. Y& W7 b3 r: C
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Then Weight the Third
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8 [  P8 X8 _0 ySuppose 4-6 > 1-3& l7 b! o; d% i! L0 w+ ?7 D

! h5 Z/ F6 p. e2 f$ F, v8 [Just like the first Step
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* x2 o7 \! b+ U' J4 vs 5 ) L( `. I! e- Z) z, q: w
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if 4=5 6 is the fake one & p6 U) [0 N! K+ s
, U6 G) C& [) y5 N2 }1 W
if 4>5  4 is the fake one
* v' v! Q* `; x$ E( A7 Tand so on......................

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問題第二步/ A4 ~) a. f) _; d- K

; O3 X3 m& t5 b$ XWeight 1:  1-6> 7-12- y/ A8 g! D% N

/ i0 z  j1 O, e) _( \  iWeight 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???* h" P( O8 W3 J, u# g) O! r7 X- U+ B
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========================================7 J- ~5 h; }7 S0 s

2 N) y1 {. U; _7 F問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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# |- _& t+ C$ u1 N: k9 N- k/ L6 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