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)。
( a: a. |; n5 C% N6 ]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:
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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# V: F9 m+ _3 C5 J# O
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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+ n, W/ }1 M5 Z! g! ?

- V" N% M7 [5 k( Z' y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
! T4 e$ L+ E6 Z9 }+ j; k7 o相信e條題目都有吾少人玩...

0 d, @  E+ X$ P' U% W我以前畫左個chart去答,& a. J) z5 w9 F& M* _
等我搵下仲在吾在5 @' c; C% }/ P8 I6 e) H; w
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
( k3 a1 B% X+ n1 A13.........
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6 M7 a. P0 l: r+ x: D+ Q$ g4 E[ 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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1 ?! i7 V+ l" b, B, H我以前畫左個chart去答,
6 f9 }( X+ n) X, D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:
1 m- a, Y( Q( E7 Z+ i- y唔識隱藏...已經諗到..

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sor !!!....e加改左' N$ e1 t% C) t) c2 U

! A# e! F& v" I4 e9 V2. 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:
4 F& S9 s$ a( b5 d5 Q, r6 {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.7 o! ~3 l5 o( w4 }% z

0 V9 X. ]! O) B  U0 ?+ ZThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- B" [0 s7 b6 ^) b/ A$ Z

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* ]8 ~& \( q% SPlayPlay, Let me know later who has the right answer and I will add points accordingly.) n  E9 l) i$ v  q0 |7 ]
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Thanks

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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 7-12
. u8 Y+ _- W3 `) o/ [2 |if 1-6 = 7-12     13 is fake
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9 Q& b; J+ e+ |/ fif not
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9 S8 w3 t, k3 u' p! K7 r0 w  eWeight the 2 time
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; b+ N6 C& }1 b+ K/ Q% F' h; GSuppose 1-6> 7-12
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1-3 vs 4-6 $ w) s- O3 g6 ?& X: p
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Then Weight the Third  n1 G3 }/ I; G, T: Z* T
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Suppose 4-6 > 1-3- ?/ u% v% o" i4 h9 a

( e3 x1 ~# Q7 c  A3 F0 q. J! HJust like the first Step: B. w# C2 c# Z6 T
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4 vs 5 . X5 a& {% D: l  c

0 `1 w3 R, z* u0 T% s! F4 F8 W0 qif 4=5 6 is the fake one 5 }9 j; p& N! f) Y# ^# C
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if 4>5  4 is the fake one
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4 @/ W" Q* M2 G: Mand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
, s5 r+ o/ l1 h2 w* B. NGroup B: 5,6,7,8
, `3 n! Q& a# x5 G8 nGroup C: 9,10,11,12( s/ z/ y! t1 O2 ]
Group D: 13& R# y% J0 }3 Y
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Round 1+ E1 Z, z0 C1 W* S- m( I/ W4 g
Group A vs Group B
( n  c6 s- `" o% o# D如A and B一樣, 即較輕一粒在Group C or D* c! s4 d2 x- r3 Q: c
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Round 2$ H! X  E& c6 q
再在Group C拆成:8 x0 j4 z( ~; B4 I+ X8 U1 N6 K
Group Ca: 9,10
3 j5 A, y. c. @* k* p5 q+ tGroup Cb: 11,12
+ Q5 u/ X( @6 x8 P然後再秤, 如一樣, 即13為較輕一粒.
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. {* d; e- M! k7 w) n' ?4 N0 k如不同, 即較輕一組有一粒較輕波子在其中,
" Q! |4 n( H2 n) m3 c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
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1,2,3,4 vs 5,6,7,8 = equal
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Round 20 j9 j' O. x& K& h  F6 [5 w8 z/ }
9,10 vs 11,12 = 9,10 < 11,12& [- M- D" o1 Z; F8 @0 K

- T0 ~. \6 F2 L8 S$ l( b1 ^Round 37 `4 B; a$ A8 h. I; ^+ y
9 vs 10 = 9 > 10& d3 }9 r, X1 W" r$ o$ r
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The answer is 10.3 j( p1 Q0 q+ Z$ B. T

$ B% w4 S: i$ Ie.g. #2 假設7為較輕的一粒1 x8 F) K* l' F" l* D8 h
Round 10 p1 c3 C# @/ _. F; Y! d7 {$ @% Y
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. {) X3 u. u" b8 Q0 L. Q* ^" a

; J+ ?! H& U' [+ n( m6 v) aRound 2+ c) R' u$ H! q( {* D4 l6 U7 l4 Y! G7 m
5,6 vs 7,8 = 5,6 > 7,8
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7 s! M" ~6 e, ^) S* p0 XRound 3
. |$ W0 D' P) {" l, L# ~7 vs 8 = 7 < 8! l% l+ z0 u) ?, h

% A# N$ f) o* L& QThe answer is 7.
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e.g. #3 假設13為較輕的一粒0 j, u; g" r& b4 \3 y' Q" O* U! r
Round 12 G1 ^# j" j8 M5 v6 H5 i8 C
1,2,3,4 vs 5,6,7,8 = equal; I. h) N9 K4 _& s6 `) @2 _

9 j, z' g7 |2 k$ w$ W4 tRound 2
! k# o3 N5 [4 h' p3 O2 N9,10 vs 11,12 = equal# J* v/ O9 U# [" ]5 Q
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No Round 3
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The answer is 13.; n+ K& H% I' z: p7 K6 F3 R, v

( q2 y, H4 v2 l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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# }, X$ p9 _; r! D+ |( {* X1-6 vs 7-12( l- \, d# c. H
if 1-6 = 7-12     13 is fake& P: o2 i, o0 c
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if not
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Weight the 2 time & h. j: j! j& U( }5 p

# v# @. B9 a5 C3 y" h  G1 mSuppose 1-6> 7-124 G9 J& O. M5 f3 K+ |& u3 u& W
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1-3 vs 4-6 + y. C5 b3 G8 ?2 l' m

9 G. N) E/ t% jThen Weight the Third% m- B1 N) U) d. T; ~. ~" g8 X( \( a
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$ O+ \( I) \1 T' _Suppose 4-6 > 1-3
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  @5 Y' J" q( Q2 a9 @9 nJust like the first Step  ]% T+ U+ l9 P3 A) c3 h5 }& d
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4 vs 5
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: j1 n; o$ M( tif 4=5 6 is the fake one
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" s* @2 y8 W; C6 |if 4>5  4 is the fake one & ]  p, |* C+ K- L" [. S
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12
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& m9 Z8 Q! e! dWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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9 z/ ~, x  \6 a2 ?" y4 O! u2 W: b& R# I你第三步点去搵 7-12 边一粒???/ a: m# V4 Z4 r
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! t! B3 M0 m2 R( Q問題第三步
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( U$ S4 p" j9 JWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 2 w. @5 F2 t: k9 }' f5 Q; a. N

$ ~( _) Y+ H6 p# p& ?$ U1 w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