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)。2 l2 C: q, f- ]( U* v! O9 \+ L
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: 2 }/ a1 g  Z; K0 j

8 R  @+ J2 W. i1. 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. s1 {5 l' m! r  p

) A" ^% S' h$ w2. 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) u- {" }) ?* ], {$ \
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:7 |  M: ~! s, F1 x4 }/ T& @
相信e條題目都有吾少人玩...

& Q; e" s/ l; p  U# u& A* _- B3 W我以前畫左個chart去答,
8 O5 ]. t' H& {. U等我搵下仲在吾在$ Z& K% [% X& y

- e9 K8 P  G2 y/ |% [% M: x當日用左37分鐘答１２粒波子，差７分鐘才合格。: X! j* {5 |1 s" S# U6 X$ u6 l
13.........2 ?5 f$ q  ?* W( n! f. J. Y( n6 Z

- N  ]8 d4 y/ ]9 S; Q$ y* F[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:7 h/ C4 h' E, N+ W3 U0 a
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我以前畫左個chart去答,
6 ~- Y( W1 q: b! X等我搵下...

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* }% w7 R5 R( u& l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:
5 U0 v1 l1 T4 o唔識隱藏...已經諗到..

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5 K$ o1 g" q# j- csor !!!....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
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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:2 I6 Z# M" d9 h5 [, v* V' F; `* S
相信e條題目都有吾少人玩...

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1 I/ Z" V$ `& F4 U. p6 ?  jPlayPlay, 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:* t/ K3 t: J  Y' I% R$ I9 N4 `

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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# ^7 T2 f$ }6 I/ X3 [  P1 lThanks

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, l: Y  r2 z1 |* F) U, C# |不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
% w  S- `; i- r; o1-6 vs 7-12$ u2 J$ u9 e: x9 D! Q9 i2 t# E
if 1-6 = 7-12     13 is fake9 E( E. ]/ ]! e' Z6 Y

+ [; h( Y& X9 q3 N# r( t3 Z* Bif not
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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. A( K. Y" I  {( ]1 f, NJust like the first Step8 r- P5 {, T: t( _

* i3 ^" V0 A4 {1 }/ c4 vs 5
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if 4=5 6 is the fake one ! Y  Q( U6 e  D$ e+ h( \

* E$ {- m- h- `7 q; b/ hif 4>5  4 is the fake one % e+ I" B' R( m1 s0 }: p! |0 R
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and so on......................

hello1997

分3組4隻波子秤& G/ y+ j4 }! N, P
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Group A: 1,2,3,4( b! {/ V# H" g) Y' `9 F( U  D
Group B: 5,6,7,8# q+ [% L* O0 A- U9 w5 t
Group C: 9,10,11,12
/ A: f4 m1 ?; V( Q' IGroup D: 13
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Round 15 V" F4 u* l2 j- k, d
Group A vs Group B
. h' d+ s! x+ ]4 \6 a9 ^, l7 i如A and B一樣, 即較輕一粒在Group C or D
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Round 29 Z. B4 d+ f! @
再在Group C拆成:
3 w. b1 T$ o. c% H* @# sGroup Ca: 9,10! p( G6 M* K* {, Y/ u! R
Group Cb: 11,12! ?4 r3 G# m' `: e$ s: l( M
然後再秤, 如一樣, 即13為較輕一粒.; D+ e" G* k. e- e5 X

3 j1 W( [* z$ O' h如不同, 即較輕一組有一粒較輕波子在其中, ) h. q) o" `2 y- k  Y- E
要再秤, Round 3, 之後便知答案.) y7 y' b( \) P1 c. f: \
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e.g. #1 假設10為較輕的一粒" M' I: j! w  Z# S/ `5 {
Round 1; v4 C3 P3 j, }# D
1,2,3,4 vs 5,6,7,8 = equal
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, |' e0 w7 F: b; F  Z8 j- zRound 2
; A8 f" D; S& e9 M9,10 vs 11,12 = 9,10 < 11,12
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Round 3
: C/ I8 N! Q3 }' L9 vs 10 = 9 > 10$ N! S& @: V) W
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The answer is 10.
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e.g. #2 假設7為較輕的一粒; W4 S6 O0 T6 Y+ J8 Z$ O& O
Round 1
& _* T, p; p, j1 M& }1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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  s, v  r# f+ P  G% s% WRound 2
4 I6 R/ W* E' M! q1 d3 m5,6 vs 7,8 = 5,6 > 7,8
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Round 3
; W1 U9 |6 E  v6 w7 vs 8 = 7 < 88 H& a9 `  ?! i/ i8 n2 a4 X

5 F- J. w  l/ DThe answer is 7.
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e.g. #3 假設13為較輕的一粒
, _3 l8 M% Z, ?  B8 j- k1 A1 U" c# YRound 1
' Q0 f, Z) m% N1,2,3,4 vs 5,6,7,8 = equal8 j6 a" h% T0 ~1 l; L  e
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Round 2+ T  v: L" o8 ]; j) P/ d0 I9 P$ P
9,10 vs 11,12 = equal
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* o" _8 q7 n8 MNo Round 3
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The answer is 13.8 ]3 V" k9 C5 D7 n0 ~# ]6 e9 A! s

6 m. A9 x( }) u6 ^5 Z1 N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:
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1-6 vs 7-12& I9 a% C8 ^6 T% I( k& Q/ K( d, s
if 1-6 = 7-12     13 is fake
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if not   X# t. x% I* l8 D! D7 L

+ k4 p, z' i- ?& ]6 [. _Weight the 2 time
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; F7 w' e0 y4 j3 aSuppose 1-6> 7-121 {5 h& E, y9 }% L( O" c* G

9 D- L9 @( a, t0 T9 S' z" k1-3 vs 4-6
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) j! N( D$ x" p2 b! ZThen Weight the Third$ ^4 @, f0 F! n$ u" N, z
3.
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Suppose 4-6 > 1-31 z/ f1 A, {# [9 y4 n9 q

2 v* [/ p' t0 M# X( F- I' NJust like the first Step
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4 vs 5 1 P& D7 x4 @" A

) m' p7 p; `  h# Jif 4=5 6 is the fake one
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if 4>5  4 is the fake one ( j  w4 j! H- O' e- G
and so on......................

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& @) U5 L* \* ^% y0 `! d4 c問題第二步
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/ M. J7 }: @$ J& t( G. SWeight 1:  1-6> 7-12! H0 l" H; t9 z* w% {& }
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6* r" B; k" v! o' U. ^( {' i  B

9 w. [4 k# k% v- V3 k# {你第三步点去搵 7-12 边一粒???, |: Y4 L( b  V3 ~

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問題第三步. u: t) [( n/ u1 K7 o

$ g  C1 B7 H% SWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 0 d" R0 i$ k- Z$ `' }

6 W! Y+ k4 N5 A8 u$ n9 m6 W! n9 ^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