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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0 }8 P# y; V/ R『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)。4 A$ j( t  l( P4 V' d
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？』4 E# A: C4 T# d3 c, b
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注意:
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3 Z) W* L  S: [1 j- [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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4 Z: m( C, D. x. k( X3 H2 E. H2. 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! t5 Q" a- G, C8 \
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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 21:34:7 G/ I$ w/ C6 q
相信e條題目都有吾少人玩...

0 A4 P9 W# ]- u; Y我以前畫左個chart去答,8 n- f6 X7 w' s* V4 }9 h7 h3 v
等我搵下仲在吾在
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1 R3 s0 u1 Q) Q" {' K/ }5 e當日用左37分鐘答１２粒波子，差７分鐘才合格。2 a8 _0 [* r8 M  b6 _) \$ j
13.........3 v3 g- v3 D1 `% }9 s, J; R
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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:- n) D. U1 [2 _  {

: p# b, G4 a+ M2 \我以前畫左個chart去答,9 \0 u5 ?) K8 G
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:% U% k! P" j4 b" E" v. Y
唔識隱藏...已經諗到..

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sor !!!....e加改左
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( b& S5 c, a. E; s. s5 L! e$ H2. 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. `3 h, J- x3 a% ?* H
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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:0 ~* o; G  R4 z) w3 N+ j
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./ {/ n6 n) Q8 Q7 P* F  t# ^) v

" ?9 z/ \: w$ X0 w) F2 m5 M. OThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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* r7 \& {5 J: i! l' CPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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* |7 w5 o) O* C6 O不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-123 H; Z# m9 K, i5 d  j5 q. x
if 1-6 = 7-12     13 is fake9 ^' O1 N7 ^0 K! p+ g

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! Q/ C5 y; C  k6 \  t% {: z, BWeight the 2 time
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) d4 L0 s; P8 x. c3 Z8 {Suppose 1-6> 7-12: J+ K5 X2 e5 h5 }# V6 K
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1-3 vs 4-6 0 e( W" w) F; {0 q/ a) g' e) j
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Then Weight the Third
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Suppose 4-6 > 1-37 [" y' E% w8 r

, J; T: q8 @* z/ |1 X8 ?Just like the first Step
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if 4=5 6 is the fake one 7 Z# Z. |: t5 o" u

8 V# |: t- w1 J. N$ ?  a' P# J7 hif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4/ f4 k9 Y2 v5 x, p2 I
Group B: 5,6,7,8# a7 d2 |4 c0 B& k4 c( o. Z; e
Group C: 9,10,11,120 |' {( A; ^0 ~* L
Group D: 13; W7 _8 y3 ~  {) Z, O- T0 f% U& E0 S2 |

1 m, X3 M  i+ k% XRound 1) C. |( |6 j0 u% V9 T# i
Group A vs Group B. g) v3 v5 D6 |
如A and B一樣, 即較輕一粒在Group C or D$ ?, t9 o9 l& q( l$ s3 B; ^

5 b: }' w* v- h4 a  U0 b! CRound 2
6 d6 |$ M) U4 }, @/ h8 a再在Group C拆成:
$ N2 `1 [! ]" IGroup Ca: 9,10& g3 u1 I' f$ G; T
Group Cb: 11,12
1 }7 `5 S6 b1 o4 d1 f然後再秤, 如一樣, 即13為較輕一粒.6 e& p0 m2 T# |( C2 l7 y6 q

* k1 ^6 o5 j8 x% g" `如不同, 即較輕一組有一粒較輕波子在其中, $ p2 x' `) y' S, x+ P7 y
要再秤, Round 3, 之後便知答案.
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; A% }( J' G) L- W: be.g. #1 假設10為較輕的一粒7 t  C. E4 ?5 Y/ \( Q# w
Round 1
3 a0 Y' H* r; u3 u" B/ c# n: O  o1,2,3,4 vs 5,6,7,8 = equal4 M' |/ _9 ~5 U3 D
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Round 2
1 b0 P/ h* o' }( `6 k( g9 G9,10 vs 11,12 = 9,10 < 11,12* j0 F0 I% d9 _# _7 `

% [4 ~: H& v& C1 r. c4 j  z- @Round 3( f9 m' }2 x% e# u* W/ z
9 vs 10 = 9 > 100 [' [& O5 A% \/ N9 {1 H2 B0 W

4 f2 |7 O: @9 K0 Q$ DThe answer is 10.' M. f3 U8 q% X/ u' |
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e.g. #2 假設7為較輕的一粒
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9 x4 i+ f  s5 J& g' Y! O) W1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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4 U, E6 n$ W' y, q% v) |Round 2$ [2 e, h3 B' q  F
5,6 vs 7,8 = 5,6 > 7,8; x: J6 e8 }( P

$ o9 M) m, c! p- l4 hRound 3# Y4 X9 R6 p4 k. H, n! u: O
7 vs 8 = 7 < 8$ u; x% W0 {4 G: d* [3 ^( W* q

, X8 c& S; L% kThe answer is 7.
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  X1 n( `8 |& E7 Be.g. #3 假設13為較輕的一粒. Z$ X0 l, _4 r4 x: k
Round 1
7 [1 U" V; ~/ U' {. j4 W( R1,2,3,4 vs 5,6,7,8 = equal) a- |" d, K) w
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Round 24 l4 |  q; J8 }) K. u0 F
9,10 vs 11,12 = equal) V2 p' K0 \1 G9 H+ p

# k3 K8 g+ X: UNo Round 34 X0 g8 x  |$ J: t- ^
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The answer is 13.
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唔知我答得正唔正確呢?! ' e7 t% {  q% t* Q% f8 j
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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:* |% F* y* h7 y) {, w9 V
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1-6 vs 7-12% E& k+ a2 m7 `% t3 s
if 1-6 = 7-12     13 is fake4 f9 ~/ Y: o9 q: O" l+ z1 U+ k* I
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if not
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' j1 Q- Y& {* k) C$ z: _* OWeight the 2 time & w  h: j5 C* D/ N4 Z
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Suppose 1-6> 7-12
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5 `& ?) J) C: }, o' i1-3 vs 4-6 / `' }& ^# z- p0 `9 S

( S$ v  H: g: o4 C4 |: D% xThen Weight the Third
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) f# M- r" K7 R+ Y. c; ZSuppose 4-6 > 1-3
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' B1 s4 P& @' h$ @% W7 j: Z  sJust like the first Step
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; b! `0 a1 \1 l6 ~1 ]4 vs 5
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if 4=5 6 is the fake one 3 J5 ?0 J( w* L
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if 4>5  4 is the fake one : r" g( x7 B  k6 n8 ]. C( [' C
and so on......................

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問題第二步
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, y4 H6 o5 [3 P2 k- l: yWeight 1:  1-6> 7-12; t# T9 Q0 I; C7 E0 W1 X
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6: F4 [' _  ?1 V
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你第三步点去搵 7-12 边一粒???$ D/ C0 ]7 e* Q  m3 G" R) ~. A

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' p; ~: F) J  ]; k& C8 c問題第三步
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5 v' M# y( Z% r9 WWeight 1:  1-6> 7-12
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- g; Q& n9 h" s2 Q* a7 MWeight 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