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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3 F$ x# b/ D# n8 v4 x5 f' Y『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)。& b, h5 l4 g- H# |; r0 i
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？』  K2 M- u' E' v% l6 y
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注意: # K9 {0 k3 O3 D( H2 u9 S

. s1 @5 P! C, k3 M. V, L. c0 g1. 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9 h2 }3 ]+ J2 I
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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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, E' e2 `2 u! k5 r5 c[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:5 b! i& z6 ~+ |7 F
相信e條題目都有吾少人玩...

8 p1 L( |1 \' o) l3 N) [我以前畫左個chart去答,$ [3 ]6 V/ E5 T! ^- a' }
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。
1 n4 U+ X0 Y8 W9 \* s! {13.........7 Y7 l# V( o+ z4 n$ y2 t

% y) s' i3 O3 _. {. K[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:$ z' Z! l0 `4 v; O' L3 q( c
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我以前畫左個chart去答,
$ R. k2 c% d$ o, t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:
2 Q# _: V- ]0 @3 y/ `; U; f唔識隱藏...已經諗到..

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$ V2 K+ ]/ U- H2 V, ^sor !!!....e加改左1 i! i  f. b4 Q0 u1 J5 K

. P" E; O5 D& b6 y0 g6 u2. 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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8 m/ Z: e  {9 e9 t" N# M0 w* 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:
4 }9 y$ |5 I- ]2 v7 Q- `+ S相信e條題目都有吾少人玩...

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8 w- N4 g3 Z4 D9 l! c2 jPlayPlay, Let me know later who has the right answer and I will add points accordingly.# B  }- r% _# l3 M$ ^
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: S, T9 O% m) L: p6 q% {

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( k+ T1 H& x4 s9 ]9 PPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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9 \' z1 H5 B: W) HThanks

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' T7 G) m- ~* F* e  Z+ e9 L不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
; Z! m* ~; }4 n& n5 l- J# R1 N6 t' i8 h1-6 vs 7-12
& }/ y: F5 z9 [7 Oif 1-6 = 7-12     13 is fake
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+ y) k1 [: _1 J9 l4 c  nif not
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Weight the 2 time
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Suppose 1-6> 7-127 g  V# C$ U. F8 X
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1-3 vs 4-6
7 ^1 F6 e& ]0 a+ W( j! G0 m2 {* \1 c
Then Weight the Third* H, F) ~, r& l' x8 u
3.
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" A+ X- m9 n/ j# `% F+ K8 [" i  ?6 ESuppose 4-6 > 1-34 \' z6 ~: @; @. r7 F

' ?+ K, O! E. ~: X1 MJust like the first Step
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: u( K. Y+ j" h( s' y4 l( ~  H4 vs 5 ! ^. j$ S5 D- X! K" {
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 7 X6 N9 O9 `, [( W6 p( ~, ~' q

$ ~5 ~+ ^/ ~2 d' U* F; Vand so on......................

hello1997

分3組4隻波子秤
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* N- r: [& v) UGroup A: 1,2,3,4
+ O, ^  X) L1 i: VGroup B: 5,6,7,86 X/ Y9 @, X. K. n/ g: {: j
Group C: 9,10,11,12- i3 B8 N* ^! s+ Y) Z; u
Group D: 137 R) J3 E5 q+ ?

* N1 E" A" Q; @' ORound 1
2 d. b& S; }( b/ dGroup A vs Group B
" ^, H6 O+ s/ }* `) i* g( E+ a如A and B一樣, 即較輕一粒在Group C or D
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4 Y$ b" w) D  r; i$ lRound 2
- X1 ^: S. D5 h, J再在Group C拆成:
6 P) w' w) [' {( J4 BGroup Ca: 9,102 {5 v+ b8 a* I5 a
Group Cb: 11,12
7 g, u' a9 C+ p- n然後再秤, 如一樣, 即13為較輕一粒.
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5 L+ p, [- q) B* F: o- j2 ?6 l如不同, 即較輕一組有一粒較輕波子在其中, - k( F& p3 O# ^; B6 H+ J  }# a8 ]6 l9 _, y
要再秤, Round 3, 之後便知答案.
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) ~  y- ?+ E6 B/ ?5 H0 ^: o" V0 ?e.g. #1 假設10為較輕的一粒& D: k5 x6 I7 @/ @9 r2 l' A
Round 1& ~8 G1 C* O7 f
1,2,3,4 vs 5,6,7,8 = equal. ?) G) r$ R' H+ n8 Z

! m+ ~- q( k* k+ _+ K, c3 nRound 23 k  k4 a7 [5 V0 W+ e' U
9,10 vs 11,12 = 9,10 < 11,12) ~: o* |; Z% s  v0 @2 G
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Round 3
$ p! C- s, [/ H! `: P9 vs 10 = 9 > 10& A1 q8 A4 z$ |: j( `% S) S, u9 t

2 s% ^8 e2 r$ E& `2 v% g* W$ m9 WThe answer is 10.
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e.g. #2 假設7為較輕的一粒+ H4 u/ k1 a" D2 M9 L+ z3 w
Round 1
8 b, i! }4 S( `2 X1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5 |( V- ^7 `4 A: R& C3 t' lRound 22 }% ^3 j5 q) r* H# L
5,6 vs 7,8 = 5,6 > 7,8
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( s4 w0 u* \" K- s) O/ qRound 3  o9 R) Q4 \8 y- R4 A
7 vs 8 = 7 < 8
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/ P( i8 [; q, Z8 CThe answer is 7." D( ^- D. c; e0 M! e; r

  @5 C1 U( k9 N  _  w. w% Ye.g. #3 假設13為較輕的一粒
5 O: x# d# ~# J) r8 b. S$ x) GRound 1
/ D4 c# F7 u& a( c1,2,3,4 vs 5,6,7,8 = equal
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& ]3 J7 U& v1 v0 v( K; rRound 2
8 b6 O% g, z( E/ Q4 ^5 v9 U! Y4 d9,10 vs 11,12 = equal
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No Round 32 L0 }# q! `3 ]4 |& L

& d/ a" ?! q& Y5 vThe answer is 13.7 f% Y4 N, O- r- w& z# u" h: h3 ^  @4 F0 m

  _2 N6 _' ~  b. E唔知我答得正唔正確呢?!   @& Y/ T- U$ _# l2 {
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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:9 @) o4 p9 ^! C3 Y
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1-6 vs 7-12+ ~1 m% {; @6 Y0 C1 L
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 7 W- s5 Q  P4 R4 Z6 L2 C
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Suppose 1-6> 7-12+ _6 K& x2 M! x" A5 E! C; q

4 u  [: j% ~7 e5 c1-3 vs 4-6
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; l) a* ]8 `3 xThen Weight the Third& e0 Z  q& _5 }" k1 q
3.
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6 Z" a, [. b- h  c& xSuppose 4-6 > 1-3& V7 f( }8 Q9 Z

+ F. z) X# d( D. O2 Y/ K8 ?2 G6 G; KJust like the first Step# X4 X% v" n/ }( y9 O: |. w, v7 J
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4 vs 5 $ G; H1 x; T5 F2 e2 X4 D
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if 4=5 6 is the fake one + q0 _/ Z' M( Y: T

. l2 E' K. z; B9 ]) B* X" Y( Fif 4>5  4 is the fake one   F! r5 x: i/ B4 P- e% \5 }
and so on......................

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  `! A/ l3 _9 q) h7 ^" Z0 P; v# a問題第二步
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, z# i' ?. Q! a. jWeight 1:  1-6> 7-12
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Weight 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???8 `4 R! q: ~4 v5 [% N
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========================================
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問題第三步9 L" m- i# D$ ^! [) B

2 A: ?# q  M; {7 v# o* IWeight 1:  1-6> 7-120 Z; `+ d9 m6 v. f
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Weight 2:  4-6 > 1-3 , E5 s/ C1 b4 f1 y+ D2 O6 ?3 P
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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