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; C6 o% `1 ^8 h. R4 I
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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)。- u9 x3 a- w0 l" T; b
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？』+ j+ g( \5 `2 l+ s# M
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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# B7 C  R7 Q* f- A4 t) D

- L( g. y& q- \& K/ M! ^! _1 q! 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5 b$ n! c+ E- D+ N9 g

, r$ M3 [# y( `[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:2 W# Q: |8 x1 C1 f& m( o
相信e條題目都有吾少人玩...

7 h8 t! t( i2 S我以前畫左個chart去答,
  x% S8 L6 A  C: m! G3 X等我搵下仲在吾在
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- j0 p1 Z$ v9 M- @: y  g6 M當日用左37分鐘答１２粒波子，差７分鐘才合格。# p# d9 P% s- h, S4 j8 ^
13.......... [6 w: h, j& ~6 J  m3 O% \# ]1 U

8 a3 \* Z  I0 d' I2 C* p0 C& _+ y[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:* j: l% F' W2 q3 g" \5 _

3 a% {" K, B  R7 U: K6 b我以前畫左個chart去答,+ q0 o/ X' B$ |" a/ [  R
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:6 x7 f8 C& ]4 i: R5 [. a( I! _
唔識隱藏...已經諗到..

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* i# C$ p+ E: ~9 \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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7 T8 v5 z# M: u/ H[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:) w9 K5 d4 N; P
相信e條題目都有吾少人玩...

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# |7 f2 n! L- C& aPlayPlay, 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.
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) y9 v4 J# e4 LThanks

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. ?0 J" O6 Z" M$ W& P. r3 }0 B6 A, K不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 w0 y6 n7 o! [/ p1-6 vs 7-12
- f: T& f" C$ K" u4 t! [. J) Uif 1-6 = 7-12     13 is fake
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! Z* q9 Z+ T9 |/ l9 qif not
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) a/ R2 x- ]/ w3 f% ^% fWeight the 2 time
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: ^) w% @5 v5 F- s3 y4 zSuppose 1-6> 7-12  [* @& p9 Q& ^1 T

3 i- q1 Z$ c. O: Y- [; v( N( e. s1-3 vs 4-6 * n' i# N$ h$ H' q  k2 z
# a$ a4 Y0 [& U" M# @) i3 O0 ^7 _
Then Weight the Third, _4 D9 K, }5 s( k+ t& `4 V
3.
5 g4 I, j7 t; x- k: |/ d6 T3 o1 I4 i
Suppose 4-6 > 1-39 F. }3 q, c5 T" V

% S. C8 a7 L: q$ C' {/ fJust like the first Step  D' x7 |# ?1 U# I; ^: X

. \4 y% a1 C2 p/ `$ ]6 o4 vs 5 3 E- Y9 i; q0 M9 y

5 Z/ p7 \& G7 Y# x' t! c% S$ `; O7 Oif 4=5 6 is the fake one 3 F: L& B) }+ M: j) P4 U
* I; ]" y) @  {5 J. \9 b
if 4>5  4 is the fake one ; ^2 U6 X5 L/ }7 Y* G
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and so on......................

hello1997

分3組4隻波子秤3 X- u& V3 r, D5 h; u+ J3 }
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Group A: 1,2,3,49 F6 ^, a& d: h0 W0 ]
Group B: 5,6,7,8
& u) J4 @! ?" s; j9 u8 y  EGroup C: 9,10,11,126 k. F5 I- F0 f$ i  u/ S
Group D: 13
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Round 15 Y$ |1 `9 x) x# H3 {. c5 V  L
Group A vs Group B
! Z5 U% d8 H& s. O5 |如A and B一樣, 即較輕一粒在Group C or D
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3 s- B. `! A  z( ?9 p' C1 aRound 2. {1 t5 L+ G: k7 \$ H$ i
再在Group C拆成:
9 e0 |5 I+ u5 zGroup Ca: 9,10! |- X: |3 X4 q; j' i. g$ B: \8 N
Group Cb: 11,12
) G5 |2 P  X) k3 |/ `; g0 l1 D- k然後再秤, 如一樣, 即13為較輕一粒./ Z6 l/ C  t! \% n6 x$ N1 S5 f* k# _

% x; C: N0 S/ k. w( n  Q: o如不同, 即較輕一組有一粒較輕波子在其中, 5 Q& G7 h+ V8 O4 B2 m: B
要再秤, Round 3, 之後便知答案./ L% p" t, U& D( q% z% c) p

5 g# O7 W- E& a1 Te.g. #1 假設10為較輕的一粒, F. y: P  V8 U( ^
Round 15 m7 u  q* @- w* m
1,2,3,4 vs 5,6,7,8 = equal2 W. f" ]: E; I: o

7 j+ c& [2 i% F) u; [- zRound 2
  g/ F& v- E6 q9,10 vs 11,12 = 9,10 < 11,12
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Round 3& Q! Z& \: c5 J- K
9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒5 q, H  j; y& H! N. s
Round 1
( V. [- Z; F3 V0 X' X  i  B1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 l" R$ N# q  P! _

6 m7 E1 z6 n$ _Round 2
0 t! n! M7 ?! O2 ]; w5,6 vs 7,8 = 5,6 > 7,8
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( C5 s* C* E$ v" h" P* vRound 3' d3 O. E7 S* m2 `9 c- ]$ Z- N( h
7 vs 8 = 7 < 8
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: _$ E3 a* S( L3 U1 i7 LThe answer is 7.' \" {0 }( f2 S0 Y0 r- G: H6 g
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e.g. #3 假設13為較輕的一粒
  Z! n7 x4 S8 z  X0 c& MRound 14 H7 d4 Y/ a- C1 X
1,2,3,4 vs 5,6,7,8 = equal
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/ ^! _  D2 e( H3 o, nRound 2
$ [6 S0 k/ Y8 `+ f$ b9,10 vs 11,12 = equal: W& q! J& x/ O. D

$ D" L) h. j' i1 h9 ~5 ^No Round 3) c( j) S# P% \9 ]5 \& A

# a/ Y/ u( z4 m( }& K- H) f" TThe answer is 13.3 V9 _/ O$ k# x4 o$ F1 `
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唔知我答得正唔正確呢?! * S3 K0 ^" |/ T' C3 @/ ]2 B! Z
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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:5 n  n+ z& ]8 g5 J
1.
: l" _9 V; u0 {! X* Y, @+ o. r! W' v1-6 vs 7-121 P( V  C( z( j. Q
if 1-6 = 7-12     13 is fake
) j' [/ @: q% a' `! Y& i6 s. v0 l) c8 w9 _+ x* Y3 c
if not & A6 ?( g& G" L

  o) t. Q) A7 TWeight the 2 time
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9 ]+ D/ j# |. zSuppose 1-6> 7-12# n* ^3 A( U5 k, V; ^% C
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1-3 vs 4-6
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Then Weight the Third! Y2 Q* T* Z8 ?4 v! k! \
3.) i9 u  ^* I2 v$ [  J

& o* a8 S4 U! w; f. tSuppose 4-6 > 1-3
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% R3 S( e0 m) f* {: WJust like the first Step
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4 vs 5 8 I0 F- C4 T# A' h( a

5 e4 N: t2 G+ w9 j) ^3 dif 4=5 6 is the fake one 6 s' _. N. l' E" D! H7 n# y

. p* H  V8 k$ r2 U) q! f+ J* mif 4>5  4 is the fake one
* H" p7 X+ d% ]7 v) m2 Pand so on......................

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9 a+ D1 R" h  ]; N8 k$ {9 m+ K問題第二步/ h& m4 s6 l6 [

  b" S) u* ^: t% ?7 B/ HWeight 1:  1-6> 7-12
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: x, }/ k: e" u2 q& i: }Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6( m% h6 D4 q( m. u- c; M( n" |
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你第三步点去搵 7-12 边一粒???2 o+ K$ a7 z0 A* l% |
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. G' S0 G+ i1 d/ ~1 y. V. D% o問題第三步9 t7 d3 \# \5 x

( E! m  P$ F& k' ]$ j# kWeight 1:  1-6> 7-12
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, b" v1 Z6 r, |# B2 H- n& DWeight 2:  4-6 > 1-3 0 ]4 t, f* s1 M. @# @
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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