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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8 [# l# S$ v( l' Q' ~+ W* ]) @9 w1 x『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)。% L( g+ _. G3 ^; `
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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5 T- w0 J- T- O. y. Z. m8 e1. 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  Z8 A6 G3 R' T

( t6 @, t# g4 K  X. C6 j6 b7 m2. 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0 |7 P- `) l0 {, Y3 \6 Z" 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:) e2 ^* a9 `6 m3 ~7 f3 j
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,
8 O( s# k! }7 c* ~5 _, t7 Q等我搵下仲在吾在: l8 |9 K3 U1 D8 d( w1 c

: X0 O( ]( v* J& Q. f4 {當日用左37分鐘答１２粒波子，差７分鐘才合格。
. e+ ^$ U7 y$ }4 x$ \. h13.........
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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:, ~. M: |! I+ J
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我以前畫左個chart去答,
$ X0 f% m+ J) T6 {% Z5 t( _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:, R9 Q/ u$ e, p' G6 E% w2 `
唔識隱藏...已經諗到..

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sor !!!....e加改左  k# U; {# ~2 |8 k
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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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  v2 J. \/ q8 B+ l6 e[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:* B1 e# o3 @8 `: z, j) Z/ d! S
相信e條題目都有吾少人玩...

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& X* H' r2 n# D2 ~0 ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.1 v9 k% U( ~: Y

  n0 `: b: a: \8 K4 f' a5 }! \8 LThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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! q/ n; W; F6 W/ Q7 A: GPlayPlay, Let me know later who has the right answer and I will add points accordingly.9 [% c7 @' v: V; b
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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 7-128 M1 J5 r0 s4 i  G
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-129 ]( f0 J; t' W" ]* d
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1-3 vs 4-6
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Then Weight the Third
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. k  X& a; Z' U+ G0 o& L# K* OSuppose 4-6 > 1-3
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+ T( z( B& r9 z# N" u5 l" zJust like the first Step0 _/ ]- A+ _  U7 @3 |: H

, M5 }- K% @; ]2 @4 a/ c4 vs 5
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! F+ j1 z, \8 X) r! cif 4=5 6 is the fake one
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: V) @* C) _3 }/ \5 Tif 4>5  4 is the fake one 0 O$ ?/ p$ N! E  d  Z. f* r! m
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
1 Z: D: z5 M: A3 h! k, m# QGroup B: 5,6,7,87 M3 E7 _1 y  ^! Q+ k6 H# s6 F" s% E
Group C: 9,10,11,12
! }9 Z1 H* }4 ^; Q7 gGroup D: 138 H* }6 _" Z0 q1 \6 ~

) e; E. i4 q4 x5 s& WRound 1
0 O( ]* L+ H( u: D9 u' IGroup A vs Group B( Y) y( G' t& \. a5 R1 _
如A and B一樣, 即較輕一粒在Group C or D
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Round 2* o( F' m3 a6 \% S7 R
再在Group C拆成:
: X, F# u$ @+ v% N  s$ vGroup Ca: 9,10( y6 g; P0 j, z, [
Group Cb: 11,12
( M) b4 o. H$ I. q$ K  Y6 q/ }然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, 6 R2 I& ~% w( a3 }0 x
要再秤, Round 3, 之後便知答案.% d9 C# O( A, y1 v

. Y0 D8 Y& G4 S! Ue.g. #1 假設10為較輕的一粒
2 e4 H1 v/ k% N; {Round 1
/ V+ Q4 e" [: A% l$ r1,2,3,4 vs 5,6,7,8 = equal( N3 o8 q4 b2 H3 u" x$ N: _
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Round 2
9 p; x4 l+ ], U% n9,10 vs 11,12 = 9,10 < 11,12
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Round 37 ~, ?; t/ `; p" d% v
9 vs 10 = 9 > 10# T- k- J9 ]/ `7 `' h' V
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The answer is 10.% r  G& ?% {3 P8 t) s% H
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e.g. #2 假設7為較輕的一粒
' }! Z8 _/ T7 a9 O2 ^  zRound 1$ _  W+ k. N) d! ~
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8$ {2 }! R: F. o1 h7 g+ D( |: }( m

( ]0 x4 V( |* S  q4 qRound 2
/ B- Z' _' d  a5,6 vs 7,8 = 5,6 > 7,8
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Round 39 U7 ]0 w2 l/ Z7 S( D- s
7 vs 8 = 7 < 8
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. l% J9 F  Z" A7 U3 K* WThe answer is 7.) ^+ D* P/ P' g$ D8 n$ ~  Y3 k
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e.g. #3 假設13為較輕的一粒  d- r! D* x1 m; R4 r9 {+ s2 m
Round 19 k2 v& A! a! v
1,2,3,4 vs 5,6,7,8 = equal
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: r! B8 `, e6 t; S+ S, V2 k. GRound 2
  d( d8 B3 c/ f, ]/ l7 J9,10 vs 11,12 = equal/ w! w5 E; B& h8 G
( r9 w3 T5 u+ w+ d8 b
No Round 32 P/ c1 ]. `7 ?' ^8 z
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The answer is 13.+ U! r. ~, I6 x3 h. _- Q# b* J! q
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唔知我答得正唔正確呢?!
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1 \' u- `% ]4 ^2 z6 \$ m6 V0 M% R[ 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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, [8 n: E! O5 [( p2 \+ o% o1-6 vs 7-123 ~$ d; V  L4 n3 x5 T
if 1-6 = 7-12     13 is fake
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2 ^0 H- u8 q( D, {( s) Qif not
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. G: k  E# f6 ~! vWeight the 2 time
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Suppose 1-6> 7-12/ N( f9 o9 b1 n$ A
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1-3 vs 4-6 ) M9 d5 D6 Q, W# v( ~& D# g
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Then Weight the Third
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Suppose 4-6 > 1-3! u& F$ s: _9 n; H: T5 E

" M* e9 Q; y3 X3 R+ I" m$ ~# bJust like the first Step2 H1 C7 [0 {1 B
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4 vs 5 1 N( `+ V" k; Z

. T, u' @% K+ ?( A/ Hif 4=5 6 is the fake one
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if 4>5  4 is the fake one
3 e. U  H4 B  o3 W( u* T+ Qand so on......................

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' y, B  s" L- @% k問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6! c1 y+ d2 {, z6 ]
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你第三步点去搵 7-12 边一粒???
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========================================
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6 a$ q! L* s1 N. \* x問題第三步
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Weight 1:  1-6> 7-12+ D, p4 z: v$ V
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Weight 2:  4-6 > 1-3 - D" w6 ^) V  j; h9 f7 M$ S# y

" P) G: s$ A6 l7 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