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" b3 e! F" n  R1 i  U4 a
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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)。
" N; l6 E% C  N+ K0 n. @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？』% j8 W1 D' F3 a6 w' E

6 u' v' H9 L8 V6 C0 S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3 R" v" s* C  `4 O7 E7 U
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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:
+ W0 }+ e3 J# ]0 O: H5 [& Y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,
* ]7 L) v! w8 S0 S! ~. g+ z( ~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。$ H+ U3 H7 v: T8 k2 P* l6 K
13........./ k; i) k3 d( @: E+ E& U; \

, H9 p+ K: e/ r. x[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:' d- R, l; r" Z1 X# |1 M
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我以前畫左個chart去答,1 ~' _% A7 x( d3 g+ Z
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:
" D5 c' n8 T# C, R% s( ~0 @0 _唔識隱藏...已經諗到..

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sor !!!....e加改左5 G) \0 Q2 n$ I  T

$ }, d1 ^3 X# }8 D1 K5 N2. 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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  i6 g1 G6 n3 {. G[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:/ w- d+ K( H- v  z7 {2 k
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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% |3 Z, C: J2 C: M) j) H1 LThanks

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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3 L* ]% G- Z8 FThanks

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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.
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if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time & R$ m5 C( V% z9 M, r

  I$ c# k2 \- _, c+ b: i4 MSuppose 1-6> 7-12
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8 \% D* ^2 |& p9 b1 i; O" ^1-3 vs 4-6
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: W) ?+ l. k: l" p2 RThen Weight the Third: l, r, V$ v6 R8 z, |/ H  s
3.
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# {% M& L( k" uSuppose 4-6 > 1-3% _/ O6 s/ \$ c& K2 X2 D
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Just like the first Step
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) o9 ~2 J) J: g( @4 vs 5
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if 4=5 6 is the fake one
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6 ?9 M3 n6 a8 Z* Y* r5 f5 xif 4>5  4 is the fake one ( k5 S% J+ D4 ^7 a+ B8 x
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and so on......................

hello1997

分3組4隻波子秤3 s0 N4 [7 @& O9 I2 v
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Group A: 1,2,3,44 J1 J& ]/ T7 x6 Y& c; t2 s. w
Group B: 5,6,7,8
* X) E$ f+ t& QGroup C: 9,10,11,12- e- S4 p' x" S0 E
Group D: 13
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Round 1( a0 x1 ^! @4 N6 I- U, a- V
Group A vs Group B
1 ?  j& x6 c4 `# r0 }4 P如A and B一樣, 即較輕一粒在Group C or D% S; W0 [7 q9 r& Y$ L' M! Z
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Round 2( y7 {6 [. E" Q4 _* u
再在Group C拆成:
. z  E6 k9 r5 C4 t5 w: QGroup Ca: 9,10+ b! ?% T) |8 b8 B4 `9 |
Group Cb: 11,12
0 e. s3 B5 ^! e' c3 ]8 A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,
- m- L& f$ w; w0 z$ a要再秤, Round 3, 之後便知答案.. f* r3 G( H' K
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e.g. #1 假設10為較輕的一粒
' y9 L6 ~3 V1 j0 t& mRound 18 p" w  k9 d1 L, D9 i
1,2,3,4 vs 5,6,7,8 = equal# N- K% f9 {. m- A, J! P$ l  G

' x* Y" L$ O4 bRound 26 A' X4 L6 t. h: H  D
9,10 vs 11,12 = 9,10 < 11,12
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Round 36 N+ E0 g0 ]1 J8 T0 ~) K
9 vs 10 = 9 > 10+ V4 j. U. N# M  p! {

# V* [7 @% k& H2 O, Z( ZThe answer is 10.8 b9 h" p4 j" z0 e  {: J
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e.g. #2 假設7為較輕的一粒
* D. s' ]7 k' V. y. nRound 19 r; T3 ^2 _7 a$ {' E) Q
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 A$ V6 C) M# R# z
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Round 2* \9 N* k' r- u) {  n0 \( g
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
0 G  P# N2 r, ^) ?+ k7 vs 8 = 7 < 8* p' f7 I7 E- A) |

3 O1 A( }& U! F, mThe answer is 7.
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1 p- V3 N! `3 B* T: M, G3 oe.g. #3 假設13為較輕的一粒( n- a) T. G* P) o2 V- {
Round 1
' {* {! @, ?1 z7 ~1,2,3,4 vs 5,6,7,8 = equal7 O' `- I4 w5 ~/ |

: B0 Y# K/ c2 W, r# |# k8 JRound 25 j( h/ H1 _5 c8 m$ k. i
9,10 vs 11,12 = equal& q7 N3 a  y/ }! g% v

9 p' f- Z2 d. g# N* PNo Round 3( t/ s0 w* |/ @5 r

3 Z$ ?" u5 q- r8 mThe answer is 13.
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3 N- J# D0 F* m. N, c' I唔知我答得正唔正確呢?!   c& C+ @  n5 s. T5 ?
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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:! {) Q, ]1 \! R5 o
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1-6 vs 7-12
9 Q2 L% x6 G- j) a3 Iif 1-6 = 7-12     13 is fake- T( u5 ~( b7 D$ J( w. w
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if not - @+ Q7 Z- B0 P$ n3 P7 y

5 V( D4 R: D4 s( r4 oWeight the 2 time
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1 r" H5 g& X* PSuppose 1-6> 7-12& ~/ m2 a% n7 Z+ D5 I: g, Y- w
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3% W* g6 P" x+ t" ]' c
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Just like the first Step& ~+ ~. ^4 K. {

/ {9 U2 q9 a4 n# ?- p. l) b" I4 f+ q4 vs 5
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% z$ ]& D3 j& z2 h) _if 4=5 6 is the fake one
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: b" c1 W1 m/ F: Q! @if 4>5  4 is the fake one . _6 i; ]4 W: Q, b) S3 x9 @
and so on......................

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問題第二步' a( B1 v' @& h& Q. C6 {: Q

- \! u/ j' O3 _+ o) j0 AWeight 1:  1-6> 7-12
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! ?. X1 m: Q4 R" tWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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2 E+ H7 ?6 V, D+ E  ^: h% M# B* A你第三步点去搵 7-12 边一粒???( H  T* q' w" {/ j0 a& ]
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========================================
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, N8 w# O0 z! \& u% W& l. h( e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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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