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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『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)。1 ]3 p4 r. Y: G& J8 C9 h. 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？』
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7 m2 Y+ A4 A# R5 o注意: 4 k0 s6 w$ V: `/ b- ]$ [0 \: a- w

2 x  e2 R  k( i, [, ~! F) |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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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  s- m" Z. P; K+ D

% B9 t) d' ?, R7 I0 |[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
: r# J6 A% x- ~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,
5 Q- H6 v! f) b: `) L% d4 M等我搵下仲在吾在. y. D- N( I3 Q. t2 V( c5 ?4 n
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
1 d+ ]6 m6 R# @) 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:
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4 p# y7 o! h: o* H我以前畫左個chart去答,
$ k) Y" h9 g) g9 ~等我搵下...

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$ C- ]; z2 P* X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' `1 C, x唔識隱藏...已經諗到..

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sor !!!....e加改左. f# f# H$ J2 k# ^7 Y- P+ O3 E% s

" G5 x0 P% X0 O6 j% P2. 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; J& L0 O$ |) _% ]
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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:
& g8 P& q  b  ^3 f( e/ w相信e條題目都有吾少人玩...

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/ O# T7 t" J' p: mPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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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2 W% u9 r% j# E& j) P; kThanks

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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 7-125 ?- ~& _$ P, K
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 1 L7 y% J4 H/ ]0 s& \- }; N
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Suppose 1-6> 7-12$ [- V) o1 u$ I, J
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1-3 vs 4-6
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Then Weight the Third: D- V- }5 R+ Q: [8 S5 k# S4 B
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6 f2 j1 j$ b( R0 mSuppose 4-6 > 1-3
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! ^5 F2 w6 a) q, s4 i" K7 uJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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2 X2 U4 F4 V* t5 L: W1 p2 I4 rand so on......................

hello1997

分3組4隻波子秤9 N. o$ k0 X9 }$ T) _
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Group A: 1,2,3,4
8 V% T# L' y4 U. u5 }Group B: 5,6,7,8
' h3 T- b* ^0 [. K: R9 Q7 R+ LGroup C: 9,10,11,12
8 G- v5 Z' N0 }3 EGroup D: 131 U1 s9 {- Y! q3 {

2 P1 B4 W9 p2 ARound 1+ i( g6 }) _( t# l. k
Group A vs Group B3 V/ }. c% w3 i8 {7 l. W
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
. b3 y3 q- l# S6 J% K0 V再在Group C拆成:
( H: {/ g/ B* A5 d) D  EGroup Ca: 9,10
. R# p9 K, a( I* g  _Group Cb: 11,12
& D- q" D0 W, @& k. _" j然後再秤, 如一樣, 即13為較輕一粒.
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+ \) W. |) N. V" H/ f) V如不同, 即較輕一組有一粒較輕波子在其中,
4 l( n( Q6 d9 F- w, ]要再秤, Round 3, 之後便知答案.
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8 K$ A* ?1 g8 [4 g; ]e.g. #1 假設10為較輕的一粒# u- Q1 Y% X; h
Round 1/ L% ^$ ?; W, A) {
1,2,3,4 vs 5,6,7,8 = equal; b) w+ `5 A+ [  K( F
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Round 23 \3 [& Q" O/ ^
9,10 vs 11,12 = 9,10 < 11,12
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  {/ A2 j9 @( f0 X# x4 zRound 3- O+ f/ N: q& R; S4 K/ X7 P7 i
9 vs 10 = 9 > 10
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The answer is 10.
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4 o0 [& a8 o# N: @- `9 F( Ne.g. #2 假設7為較輕的一粒0 ]* S4 O1 b# g5 [$ M
Round 17 M4 X. l8 _5 I# Y$ d+ Y+ {
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ V0 r% y0 u0 O" |- iRound 25 @, w4 ]( ]( Z7 _/ z8 X! |
5,6 vs 7,8 = 5,6 > 7,8+ y; r. g2 d$ G* k* @: t0 j

: |; n# [' }4 N4 K) p4 @  TRound 3
1 S8 r* z+ G4 R, {# i5 U, S+ h! X7 vs 8 = 7 < 89 r; C2 T. C: ]( b- h1 A
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The answer is 7.
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: _# }1 x- _' @8 a/ [+ Ye.g. #3 假設13為較輕的一粒1 ]. c' @! A  f% ^" A) |: J+ z  c- }
Round 1- K# J% z) n1 a! L
1,2,3,4 vs 5,6,7,8 = equal
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% k- `! g4 `9 eRound 2
2 C% x! V' i+ F: k4 P1 N9,10 vs 11,12 = equal
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No Round 3
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6 i/ Y) |  C: ~+ ~The answer is 13.9 I! a+ E0 ]5 m% `- _" e: C/ W8 k

# N$ i# t# ^8 B' k  q' h唔知我答得正唔正確呢?! & t& ]" F. ?/ }: {

& q) u; S% p6 e+ j[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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1-6 vs 7-12- I! `$ L& N5 F$ K  q4 D$ H  ^
if 1-6 = 7-12     13 is fake
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if not
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5 Y- r  r) |2 d& j0 p% LWeight the 2 time
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Suppose 1-6> 7-12" z; f$ l3 a/ b; O" T8 A0 d9 c% v/ K4 q
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1-3 vs 4-6 , o) s  T7 B$ }& N. f7 n* B

1 e4 `) m4 x* ?6 ]Then Weight the Third+ a% m/ |! h0 z& p. O* j0 ]( H
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6 K5 b& }% Q) ~% kSuppose 4-6 > 1-3
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9 d3 X! n) i. q8 X8 HJust like the first Step
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% ^4 P5 |: m' ~- C- G4 vs 5
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if 4=5 6 is the fake one
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6 j% L- p* d1 K! M; A1 N9 {if 4>5  4 is the fake one ' J4 {, A' A+ W
and so on......................

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/ r3 `: _6 t/ e( F# q7 F問題第二步( Z' M6 K! K' ~$ Z! Q
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Weight 1:  1-6> 7-12+ J# [/ T4 B5 M. U

3 @$ X0 U2 l8 z' r3 c* IWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6  @" W5 x, r3 J6 W/ c

" W: u" v$ M! K' u( l7 `; C% {你第三步点去搵 7-12 边一粒???7 K. c+ R( b+ U2 t
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========================================
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問題第三步
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Weight 1:  1-6> 7-121 N" ]+ f$ _2 v  ?5 P* Z& W
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Weight 2:  4-6 > 1-3 * D3 c" J  j) [. f6 Q: @
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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