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)。
0 ?9 t. ~" c5 i; J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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8 d8 i: d% z7 O/ m& S" V) E注意: 1 A/ i- z$ `, Z7 v8 {9 N

1 f! w- d) a& ~9 X: S: K- Z8 w1. 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; g) e$ T, M/ Q0 D
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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
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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:. Q" ]3 \, {' ^6 |9 L
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,- @! a! K" M" i& E
等我搵下仲在吾在# I7 N2 _: m0 r2 M. m
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 ?4 e& B% ^9 i7 K7 d13.........
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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:  V- u% i. v9 m" ^

: t( y" _7 `# E$ ?6 h" z  y我以前畫左個chart去答,
/ O$ x4 F4 N; ^5 w: V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:, F1 g. {. K" m$ v! r7 {
唔識隱藏...已經諗到..

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sor !!!....e加改左3 o. r9 q$ x: w* x6 \( {5 Z
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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4 v3 u4 l- Z' B' Q, ]$ w

4 W) I0 x: D, x[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
! m" t) C1 l# I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:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.5 u& I5 e6 [  Z$ i. k+ k* G: h; H
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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.
  ~: U  m- B, [- U0 p1-6 vs 7-120 e& Y& _) E$ {- a  E, w) g
if 1-6 = 7-12     13 is fake4 n% S- v7 N! y

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9 @# f3 U% d$ O9 Y' f' h3 R+ ]Weight the 2 time $ D( T; ~: g6 c: Z1 j
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Suppose 1-6> 7-12+ V' o+ ]2 U- e' j
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1-3 vs 4-6 . [& \: _5 K% Y8 S) s
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Then Weight the Third
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' ^# e. g3 p2 t$ L- \  h* u. DSuppose 4-6 > 1-3
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Just like the first Step
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6 f/ z% Q+ i; y6 A4 |$ u( ~4 vs 5 6 S4 t9 t9 T$ i3 {" t6 r& l9 c# _

( N  }7 A2 p, S( D+ @" I( Qif 4=5 6 is the fake one
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5 d% P  d6 r" e; Z$ hif 4>5  4 is the fake one
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' ^) `5 @- z" z' e; ^6 h) c" d- _and so on......................

hello1997

分3組4隻波子秤% d) e5 C2 y+ s& b: m- }
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Group A: 1,2,3,4
9 H6 u9 {& f8 w% ^Group B: 5,6,7,8
0 R: {6 M7 V/ N" oGroup C: 9,10,11,12  Z  H( j3 B& J  ]- c: a
Group D: 131 f  z. O9 k! X4 h1 @8 m

! A# {. ~/ q# h$ S% _, kRound 1) G6 L8 V* U1 @+ T
Group A vs Group B
. t1 \+ h  W$ O# |) b/ `6 c- B' |如A and B一樣, 即較輕一粒在Group C or D5 q* ?- q) Z  j

0 @' v. A2 l3 U; h0 PRound 28 M9 R4 |2 N4 r& U3 o- ]3 A1 W
再在Group C拆成:1 T. M7 }: Y5 h& Q3 P, `  t, @
Group Ca: 9,10
  K. B3 L4 Q) SGroup Cb: 11,123 h. S! d5 m4 f
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, 0 G# \# E$ b. I& P8 J
要再秤, Round 3, 之後便知答案.& V0 k6 H4 h; a, u0 h
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e.g. #1 假設10為較輕的一粒
, V$ y% l' t1 v8 BRound 1
0 a) P3 W9 T- R) u7 U2 N: |1,2,3,4 vs 5,6,7,8 = equal- z3 J5 N+ s! U7 `: u/ X

. H+ q, H5 j+ Q2 C2 KRound 2! g, w/ N3 N6 R; Y
9,10 vs 11,12 = 9,10 < 11,121 o2 z& {, E( X/ ~# J

+ j. X" `" t# s8 URound 33 Q2 T, [, u1 R! U
9 vs 10 = 9 > 10
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The answer is 10.
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' e+ ~# i8 y# V  q. ge.g. #2 假設7為較輕的一粒9 v( U; i- i% p( t6 E( E
Round 1
# P" j6 @% u$ e1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
+ l6 v7 i9 l, U& D2 ^5,6 vs 7,8 = 5,6 > 7,84 _- I3 ]; ?- W7 O, }

0 {+ T! s0 X5 P4 J' x9 F. VRound 3
  f" x1 J/ Q% `! s( j( n$ ?7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
# j( k9 k& P/ W5 qRound 1: r9 z, B5 C9 R( W! g6 \" n
1,2,3,4 vs 5,6,7,8 = equal' o1 c4 `- A  h. N6 B% o
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Round 29 l0 G7 W/ p) L+ z+ i: ~
9,10 vs 11,12 = equal
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0 s) Y$ F4 L; QNo Round 34 U& x% n8 B, u5 B0 r/ m  c( y! Z

( a  w* b- h- Y1 G8 e. zThe answer is 13.8 |3 A8 M; C. k$ E  H

( s' \5 A* U9 g8 K1 J% \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 7-127 W- p) M( V. |7 y! m" h& c' V
if 1-6 = 7-12     13 is fake
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if not / G& t8 J, \4 m* f

4 @* g( U* P5 dWeight the 2 time
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Suppose 1-6> 7-12
3 a6 o! h% D+ c0 s6 K7 _5 l7 ~, U# _( Q! g0 S) j# |
1-3 vs 4-6 . I( g7 p; X  i
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Then Weight the Third' R% u2 \/ a2 ?3 v* A, d4 a( y
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Suppose 4-6 > 1-3- m$ I9 y# c) S

2 ?( D& C$ k7 G0 g& |Just like the first Step
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4 vs 5
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, G; T1 ^- ?2 z: }, Z" D! kif 4=5 6 is the fake one / a; }8 R  R8 m6 i6 g! l2 x5 y) q

3 K0 _1 r  B  [8 r! e. F8 g* `* x, rif 4>5  4 is the fake one ' P# q! L4 T; t) F8 u2 H/ {
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-66 g$ P' i6 ^! O1 j3 C' ^' N# T  J
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你第三步点去搵 7-12 边一粒???
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問題第三步
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& |) ]4 g, K" l! j% \5 u! FWeight 1:  1-6> 7-12( Z* K! G7 {- T' C2 T; s6 i) r

4 [% o; e6 _8 ^Weight 2:  4-6 > 1-3 7 N4 c8 D4 S# ?1 D+ w
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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