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. {# b& y& H/ V, n- n3 K% K

( p$ c; \+ l1 @. a『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)。
) B3 p! x# \* b2 M* H3 C% {& Z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？』
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注意: ( L3 A3 I5 ?  t- k' y/ t

+ C# V. \% _2 _1 q: u# U) T1. 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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* x4 {2 a! d/ d0 y$ ]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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2 A2 Z+ u) B7 `- o: D% A" o[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:1 f* @5 s8 ~7 ~5 B) r" R2 O/ s
相信e條題目都有吾少人玩...

0 B9 q0 D' m4 N/ a( g" s# Q我以前畫左個chart去答,
  E/ O+ ?( L6 W9 ]+ D: U# k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。5 D: J3 V% B! ^6 D
13.........
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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:
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我以前畫左個chart去答,
0 E* ], B7 j2 K% {" t2 H等我搵下...

+ f- s* G; H. i( v

- n5 \! R- d. S4 c* ~# q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:/ M# E( K# C1 C7 {- f2 `$ f8 w3 `
唔識隱藏...已經諗到..

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sor !!!....e加改左- T; ?6 M+ L8 |* n

; {, e! K* f! \$ W. }( A7 U& h8 \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+ F1 q" f$ O5 n& ^
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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 ]: X" H& g8 Y6 c& r3 B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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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$ X0 k' v4 q0 U* FPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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+ v# w# E  @. I1 V) \6 s% H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 7-12. _) T" N9 F6 O+ N5 l% {' ?$ ?
if 1-6 = 7-12     13 is fake5 G$ n- K3 C6 d0 p

' `* `- Q* l  I5 z5 k. zif not
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Weight the 2 time
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* {  {. M- q8 t, m' ?' }Suppose 1-6> 7-12
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8 @7 z7 k* ?6 p' ^. }9 R1-3 vs 4-6 ! c) r# @; T2 r

! T$ _- j' N$ y0 e3 A+ F$ f! }$ ZThen Weight the Third
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/ d' k& S# C, a; V$ K- x2 VSuppose 4-6 > 1-3; H9 _% f# a5 V9 Y! R  v. P+ n
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Just like the first Step! o# j6 Q. x; F, y3 h

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( F2 ]! C' e- h3 x: L0 Mif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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* K7 V9 P2 z5 S- S8 A. S, aand so on......................

hello1997

分3組4隻波子秤3 `  I9 V0 [# R' N6 m$ D0 h8 [

& F- ]; H4 D0 O1 [4 NGroup A: 1,2,3,4
6 B! w0 P' b( F; \5 W% GGroup B: 5,6,7,85 ^$ o1 `+ l0 B0 v" t# F5 j
Group C: 9,10,11,12
% X% x( r! \- Q; b# {' XGroup D: 137 }0 d# e  L- k2 H

3 U" x( m# W1 |/ X( ^  f7 |& bRound 1
# t4 o2 p% T, n$ ?2 ^# JGroup A vs Group B
3 F& }( A0 Q+ b6 e# p如A and B一樣, 即較輕一粒在Group C or D8 U0 z6 @: c/ q. P# Y

$ \( j5 E4 F$ x0 t! oRound 2
* m. k$ i  G# d% _8 b# f5 O再在Group C拆成:' r; @3 H- S9 z. a" X: Q0 O
Group Ca: 9,10
; U" U, Z2 @& M; P' jGroup Cb: 11,12* u1 t& H1 |' d  @+ Y0 I: A" K
然後再秤, 如一樣, 即13為較輕一粒.
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' t! U" P; ^$ i( d如不同, 即較輕一組有一粒較輕波子在其中,
" Z! o, L2 `/ h0 S: z" v; @5 J要再秤, Round 3, 之後便知答案.+ h5 f5 G6 O3 m& q5 T% X7 f) @

3 ^1 k1 }; q% H, |9 [# e% xe.g. #1 假設10為較輕的一粒0 T2 j! y0 z; \- R
Round 10 n7 A* R; Y, J
1,2,3,4 vs 5,6,7,8 = equal
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Round 24 u2 D& }$ h, G7 l$ \8 }# Y! w
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
& g2 p( o- R, _0 ]: C9 m9 vs 10 = 9 > 10
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0 Y7 e+ C3 h% G2 ^5 }9 Z6 OThe answer is 10.
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5 p5 G+ l% q9 E( B1 c3 x# Ge.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 k  k6 h0 o9 X7 H. o% s

: n' C/ \2 _: y$ o5 ^Round 2
- h0 c% d" Z6 r" S4 b1 g7 j8 _5,6 vs 7,8 = 5,6 > 7,89 Z4 e4 y/ R- X' ?

1 E& A/ m( D) r/ mRound 3; E5 o4 |: |7 L6 L' F$ O
7 vs 8 = 7 < 86 {7 t0 g; N7 }7 Y3 M# O" n
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The answer is 7.
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e.g. #3 假設13為較輕的一粒' p, F2 `" Y& ^
Round 1: p- h! j8 E3 J: z: X$ [  m
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
5 Z: }0 ?9 r! Y8 r! P4 v9,10 vs 11,12 = equal! K* W$ F. [/ j/ T/ G
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No Round 3
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3 ^! L/ O5 a1 A1 U0 w5 rThe answer is 13.
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. r5 |9 z' O2 [, z7 H唔知我答得正唔正確呢?! 4 l: e6 ?0 y' ]: b

9 \& Q' ]4 ^' Q' R  M6 m[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:6 I/ v+ O) D3 d) Q9 `  t7 r' k( L
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1-6 vs 7-12
- R7 h5 f/ V& A: h, r. ]if 1-6 = 7-12     13 is fake- f# ?' z. M# v* f! Q+ I
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if not , u! O0 S( P& {* j: z7 P4 k6 N
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Weight the 2 time
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Suppose 1-6> 7-12. {5 o/ I* C. E6 Q, F
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1-3 vs 4-6 ( |0 E+ O8 c* F# _0 n7 c
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Then Weight the Third2 f0 q6 @2 L2 X: }# h3 Y7 C3 u
3.
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Suppose 4-6 > 1-3# F  T  K; D- ]2 L  b, B4 P

; {3 h0 e2 |; J- u/ C( OJust like the first Step1 N- R2 Z( ~) m# {) ]
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4 vs 5
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6 [# r6 X1 w/ e( r( {' M- q% Gif 4=5 6 is the fake one / q" Y; [1 M4 L' R) v" d
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if 4>5  4 is the fake one ( u' q4 J/ \% I0 `, s& Y
and so on......................

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  j  m% @" s: `+ r/ X/ ~& n問題第二步
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Weight 1:  1-6> 7-12
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  {6 J3 t, p* _; `0 MWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ G* [6 e1 D5 v/ U) M0 i0 ^" T' ]

) [) f4 b/ A) u- D, O你第三步点去搵 7-12 边一粒???6 b7 [; O; {1 j4 J/ t6 {8 N

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- [6 E/ h# [1 L6 ~問題第三步
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) V: X3 ]; `# A3 i  d3 K% [Weight 1:  1-6> 7-12* m# T. @& I4 [: I7 a- w

3 H! o5 W1 x( Y. {5 tWeight 2:  4-6 > 1-3 8 a$ C; O9 z1 c9 X( Y" k8 D& W  D4 j

/ L9 U7 x' k: k/ o1 h' D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