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) U- z6 u: g* X# ?* ~% d
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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)。
) U6 d, W, C& k9 J1 M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？』  S9 S* h' Y7 I3 t8 m0 |; ?' J
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注意: 0 f/ U3 X+ Q# Q2 I/ E1 F
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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4 R" }+ V9 C3 ~
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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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, t% M( Z0 R. P[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:# i% ^; h* }) {! L# z2 h
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,& Y1 Q$ U' y( |2 _
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。7 I+ J0 D' _" x& p" f9 t1 }
13.........% e& D+ @2 e& y) `: l4 S& c% y1 S

! g/ m2 |2 \3 {, z5 V[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
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( a4 t8 j+ I' h  C我以前畫左個chart去答,- I0 G- e( q% Y# D0 D4 f
等我搵下...

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& V9 }; B2 S' B) N+ C* k0 }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:
9 U4 F6 x5 K2 @4 D/ |唔識隱藏...已經諗到..

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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, y8 ]% N. O4 O3 B, ]) g
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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:
' S! E  y+ Z, P' _! X+ a8 }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.0 J5 g' d# x- ]

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:4 v- ~" {* B% p$ o0 ?# @

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8 [0 t" M0 N* P5 S0 NPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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3 G9 ]5 m  ]( b+ _( }+ RThanks

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4 j) V& K+ ~' d9 a6 F7 U/ v$ B不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.$ E( \: o! |5 }. `5 n. B1 ^4 \
1-6 vs 7-12" g, Z6 S* L7 t0 k+ U5 \+ l
if 1-6 = 7-12     13 is fake
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) q9 y$ F, g$ p' |5 M; c% C' lWeight the 2 time
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Suppose 1-6> 7-12' C% Y0 W) ?, @+ c+ U

4 h$ V9 x# ~. x1-3 vs 4-6
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3 f. |/ m' D+ ~+ Y; i- I$ ^% OThen Weight the Third0 z1 X6 ?0 C* F9 e! ]
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 & e+ P) V! m7 n: w

3 V$ S9 a0 s# Z6 Hif 4=5 6 is the fake one
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9 z. a: I) ]/ [' V" ^if 4>5  4 is the fake one $ Y& E# a$ i) Q: }* I+ G7 k1 P
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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
/ H) A$ h3 a. J2 g0 r) {& [' r  KGroup B: 5,6,7,83 N% g  x+ x7 v( e% i/ g5 ]
Group C: 9,10,11,12; h) [! X0 l) i  J5 s
Group D: 13
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Round 1
3 o3 J% T* g# e/ S0 k( i' gGroup A vs Group B+ j6 Y/ ^  [* A! T5 D& c8 T
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
0 G& A. v, B, L7 [! W3 _再在Group C拆成:
# \1 ?0 j9 A' F! N' d2 DGroup Ca: 9,10
2 b: p0 J" s* S, w8 jGroup Cb: 11,12
, v. ?8 T. G. p然後再秤, 如一樣, 即13為較輕一粒.3 x' J8 u5 Y6 J. i# K

1 V9 X& r/ y* }+ G6 ~如不同, 即較輕一組有一粒較輕波子在其中, " r. l/ ~( S' n9 v9 R
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒: v; k4 m+ Q7 q0 Q* i# J6 n2 L
Round 1! ?  y4 v" y) T7 Y2 V& D2 g3 Q
1,2,3,4 vs 5,6,7,8 = equal2 `! e# N( S+ K. A
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Round 2
+ V# s4 R3 o) B9,10 vs 11,12 = 9,10 < 11,12( E8 r! _! f; n8 _8 n, e3 j

3 Y9 s( l( F1 n8 TRound 3
# T- f/ X" b8 a8 \% j7 O& W9 vs 10 = 9 > 10/ s7 T$ v# p" T: Z% l) F" `
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The answer is 10.4 h/ d' z" E- V' |

; P8 l0 \7 B, qe.g. #2 假設7為較輕的一粒( f6 X+ w7 P; a5 Z) b
Round 1. D  c6 ^$ R5 S' J' B
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. m/ _2 t2 |2 M& @: L. g% L. d

9 b, x2 ]& r, l( W' J$ m, r2 HRound 2
- {; N! A) |- M# Y3 M5,6 vs 7,8 = 5,6 > 7,8
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: _% Y' W* Y; c7 K( {$ T$ gRound 3
; E  }9 }/ p6 i; f% d0 ]1 v$ C7 vs 8 = 7 < 8
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1 {; v" c. v- \6 M' ZThe answer is 7.* J; ?  b& o) `* x5 k+ M
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal; Y4 ~" f5 ~# J0 O3 k! G
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Round 2% H2 O2 a( ^0 Q6 x& G3 B+ P' _
9,10 vs 11,12 = equal8 b$ v8 l! E& R/ u
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No Round 3
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The answer is 13.6 G: m8 @" Z" d, h

& W4 f& v% }5 a; w" W6 m/ l8 Y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:; C9 ~# E2 i% q& ?3 v, e7 M: d
1.
' k! ~, n1 F0 S1-6 vs 7-12
% D1 v- A3 R% p9 _) I2 Pif 1-6 = 7-12     13 is fake) e) z  C; j' C( D) R
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if not
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( x: k2 U+ G8 R+ |: x# @1 p6 vWeight the 2 time 7 v& R2 _) V# U% L1 y. ?, x: Q" z& X

% T7 ~/ |0 m% C) t$ P, CSuppose 1-6> 7-12: ^  w2 B; U& M9 V

9 @1 B/ t% t: v1-3 vs 4-6 # n# `- o, G" v8 s
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Then Weight the Third
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( N+ c  m9 C/ n- aSuppose 4-6 > 1-3+ Q+ @4 n5 J, D: f# `

/ r8 k9 w' l# {, g# QJust like the first Step- h4 m/ O6 U) {

6 i2 b0 g6 G3 ?( C$ v' S/ x; |4 vs 5
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if 4=5 6 is the fake one $ c( d0 _/ \1 Y8 w, |1 v7 n7 Q1 K
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if 4>5  4 is the fake one
- f7 Y  U0 L4 j# M- R: _9 fand so on......................

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4 c4 ~: z, J$ y1 X" }  q問題第二步
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Weight 1:  1-6> 7-12$ o- {& v( _$ A) W
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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8 w+ \9 h; O  w9 Y, v- q5 L" X你第三步点去搵 7-12 边一粒???2 r$ C7 H  O3 i/ K, Z5 }- l/ F& k
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========================================4 L# K0 B) m/ k" o& D+ p

/ e4 Z+ B2 U. }+ u/ K問題第三步/ Q) f( Z  F. k9 ?4 e
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Weight 1:  1-6> 7-12& T; o: ], K0 U( }9 D; p9 f
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Weight 2:  4-6 > 1-3 . M2 |# {: V8 ^7 U4 g

" u- I- f" _1 A1 E2 j& E; @/ f6 `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