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' w% m) a6 s# x3 W  N
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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)。
; T$ F) g1 _$ n' o& e) Z* t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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" h9 h' {6 Q- S6 a' E3 k注意: . w2 b' r7 A) T

) Q) F6 e" @3 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
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9 }" y0 f6 g6 _1 G; 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
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0 ]% ~1 B$ g7 k, C2 X' R[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
" ?) @' W' d+ h, i* x2 o! G相信e條題目都有吾少人玩...

- a0 A! U* J) h( \我以前畫左個chart去答,0 j: l. ^! d" C) F, q; `
等我搵下仲在吾在
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! g. Q% B; q' [/ s9 J# O  v+ D9 \當日用左37分鐘答１２粒波子，差７分鐘才合格。
( z. C1 H$ z% ]' q: w- M: Z13.........
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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:/ s8 ]$ t$ a% j
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我以前畫左個chart去答,
) K& A% q; u; F7 H4 N" J9 @( b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:9 g0 _- [7 c" b/ Z) v- Z4 @
唔識隱藏...已經諗到..

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sor !!!....e加改左4 N6 @+ X3 s0 M; [1 t) j7 S

' P& n  X# M/ I- z) X/ [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
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' W* I. A, _6 B0 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:3 j3 b5 s+ `' B# p0 c  _
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.6 l6 v' k* j0 _. {# B" V+ k
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Thanks

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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Thanks

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" m- m$ Z- X! Y8 L& `不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
& Y4 \# s- {  z3 c% @. K1-6 vs 7-12
/ s8 v% t, a8 A5 s+ e7 Zif 1-6 = 7-12     13 is fake) S8 H8 b8 @- j6 Q3 H2 k" b! T

. z3 @5 w) O  X; @; C; i/ j8 F; fif not
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' J/ N6 \4 t+ m! SWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 9 K  j' _( n6 P4 e% I
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Then Weight the Third
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/ g0 f  E8 {( y& |Suppose 4-6 > 1-3& J% w: {* h) A2 R3 e

2 q# U" D0 M1 I( _# sJust like the first Step' ~' g+ F9 R, \! B( _# `+ D

3 U8 E6 A: ?( x: G4 vs 5
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/ f/ U2 Y, [2 _* X/ f$ O& wif 4=5 6 is the fake one 0 c; K, O6 \- _, p0 S# }# w& d& ~
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if 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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7 b8 T9 [' x* o, B7 V/ IGroup A: 1,2,3,4
7 m( T. e- a$ QGroup B: 5,6,7,8
/ V/ z5 o% A3 t& Z: XGroup C: 9,10,11,12. E, D% Q' t" u) ~0 m3 x- g* j8 d
Group D: 13! o: h0 P. b- f+ k: E4 n

/ {' e0 U& v: G. {  mRound 1- ^& C1 w! X7 d; {
Group A vs Group B2 U: _- v- n0 m; W5 @1 f8 ?
如A and B一樣, 即較輕一粒在Group C or D# l3 E; r7 M) ~+ j

- B2 F, V% x- h5 z1 O  XRound 2
1 p: }" A0 |0 y8 `' y; Y/ z- O再在Group C拆成:; P) r5 W0 z& @$ j0 K
Group Ca: 9,108 g# a. u! y0 k
Group Cb: 11,12( P+ `0 Q1 F. M. h; J
然後再秤, 如一樣, 即13為較輕一粒.
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6 R( _3 D; B8 O/ I1 R# |3 V如不同, 即較輕一組有一粒較輕波子在其中, 9 ~( W. C8 A3 _7 _6 j' @6 f
要再秤, Round 3, 之後便知答案.' y2 T5 Y) m$ k5 P

% {9 r5 f6 |5 {' V8 |; x# ?e.g. #1 假設10為較輕的一粒
( ?- \& {. ?& K3 n! \Round 1
* u1 ]8 x, Q+ i: u$ ^  e1,2,3,4 vs 5,6,7,8 = equal
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Round 2
" f' P( i- q4 ]$ c; r9,10 vs 11,12 = 9,10 < 11,12
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Round 3( ?0 o( B- O% Q3 |
9 vs 10 = 9 > 10+ k. T# g8 x% N! |* K. g
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The answer is 10.4 M7 M- t4 Q! H) V" b' ~' f1 G

6 D6 K* s3 Q" D" f" P: Ie.g. #2 假設7為較輕的一粒7 T6 a: w) x" ]( N2 t
Round 1
; I3 e% _" M7 ?! s8 z1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
: Z- P( L( m8 \( V, Q5,6 vs 7,8 = 5,6 > 7,8
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/ Y" Q# X: W' e( ?; {& lRound 3
/ w$ z% G- g+ I. c4 v8 s7 vs 8 = 7 < 8% i7 M" e! O0 O& I0 I2 f
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The answer is 7.
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: Q+ Q7 E" ~/ b4 _e.g. #3 假設13為較輕的一粒
* P  ~4 a2 G' l7 I0 eRound 1
, G0 O$ b8 u# j4 q0 |' A/ e4 ^1,2,3,4 vs 5,6,7,8 = equal
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Round 2
! b* X$ R" |$ \$ l- d; L2 M9,10 vs 11,12 = equal
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No Round 3" m/ s# @2 k: i7 V; S; m
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The answer is 13.3 H) b- t: L% D9 m2 q1 y: a. K
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唔知我答得正唔正確呢?! & F: h: g! b6 v  b  x# {) Y
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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:; o9 x/ \) c2 @$ z* \
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1-6 vs 7-123 J) P) L0 N( P% V
if 1-6 = 7-12     13 is fake
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if not
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4 J$ `) F$ B0 r7 VWeight the 2 time ! }) b/ E9 o  g+ q& ^( z3 I
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Suppose 1-6> 7-12
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. |% l3 f- |$ p% N3 ~0 a4 E& E1-3 vs 4-6 ; \, m+ J- K* R0 P
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Then Weight the Third
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Suppose 4-6 > 1-3
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: K' a4 v9 M+ J5 w5 ?6 J( RJust like the first Step4 [0 u# K; p1 X7 g2 d2 \) ^* ]

) Y& @% T& w( L& J. |4 vs 5
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if 4=5 6 is the fake one " }8 P6 o/ W" s; _8 ]
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if 4>5  4 is the fake one 1 v6 `! D) ~9 A; D- p
and so on......................

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問題第二步4 K, X3 W) d! j

1 w& t! q$ f3 zWeight 1:  1-6> 7-12, G0 ]0 h7 Z0 O  g

( u: H  X" }  K/ t2 BWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6! L) i3 i  }6 f- h0 Q% Q2 D; j
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你第三步点去搵 7-12 边一粒???* F% ]  s- d0 C/ ^7 I& V
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問題第三步/ {& W/ K8 x, D* k$ C/ I2 H9 w8 ?

- q$ \* @7 L/ l" B+ Q0 kWeight 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