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* p7 Y1 G+ q9 k6 E

, I! o4 P  C+ R  D0 K9 @. i『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)。
: Z$ q+ H) M0 A; \  U" X# g2 J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？』( m3 E3 i( D& I
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注意:
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, P) P& C9 ?7 r1. 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6 I3 g* A* A) ]- u* h# N& m

2 C& _8 p0 p1 L0 I- 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  , hide 字要連埋 , 內容 = 答案
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8 B7 M+ C7 m/ }# _! W[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:* C7 u6 d) C2 q% D# y# ~
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 _  T2 F* R* [5 t: j5 x; f8 i
等我搵下仲在吾在% `! Q2 r; s- O7 a% b! d- K  ^( R# Z( m( b
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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3 t* N* B& a- G7 |3 ^, [( U[ 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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我以前畫左個chart去答,
5 n7 C& `$ M6 i# h1 x; p2 P, Z等我搵下...

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% H6 I+ P: |8 b; H" R- g" s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:4 Q/ R' `" P- w0 _1 ?* U" a( V: n0 k
唔識隱藏...已經諗到..

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sor !!!....e加改左* [, @, P) A/ V8 j8 z* @' w( _

+ f1 |3 b0 ?3 W0 o# L! |- D. J% `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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: ~# h# v9 u7 Z. \[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
5 n, L+ p3 Y$ U  |+ ~6 V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.
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# _& ^0 q5 G# r  j# h) |  B0 SThanks

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.8 u  U: R8 v/ F+ c! i
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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

1.
/ \/ _! z% y4 Y2 o/ g4 t1-6 vs 7-12% z& H' }* y+ J4 U- y3 H
if 1-6 = 7-12     13 is fake( \' R: }: B+ y8 S6 B

6 c. S2 \& \6 O. ~' Bif not - {/ u- O- S3 W/ S* S3 a+ {

% F: X( E* p: M+ z- X1 Z& qWeight the 2 time # i4 ^% n( ~! a: P, I6 K
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Suppose 1-6> 7-12
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2 _! S# E; _( h3 E" I  m/ [1-3 vs 4-6
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6 _* E. s3 h+ o  U+ u5 d) iThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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: }3 y( ~3 g6 c( Y0 K2 Kif 4=5 6 is the fake one
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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$ a5 n0 P. `  o- E6 u$ F: `3 w

; c0 w0 f; \9 d6 q: Y0 ]Group A: 1,2,3,4
' I2 U* c8 l# Z1 l$ ^6 O0 iGroup B: 5,6,7,8
/ w. ~. F" D) B8 n8 ]& k/ wGroup C: 9,10,11,12$ ^3 l* a5 b& v/ I; Q' D' G" s
Group D: 13
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( @/ N' P4 G4 N  q0 A/ e" v0 v' aRound 1
! L2 _- Q+ T5 x# oGroup A vs Group B' [* K2 W$ ]- Z2 W2 X# t7 H  N+ H0 j
如A and B一樣, 即較輕一粒在Group C or D: Q: v0 Q% L" R

7 F0 `, i- S4 }) r* V4 PRound 2
" E% o+ Z. g  w% I$ ?再在Group C拆成:
3 r- u) z  K8 AGroup Ca: 9,10
! P; _1 ^% f+ p. o2 m' f" [) MGroup Cb: 11,129 P8 n( Z9 V, @- S" H
然後再秤, 如一樣, 即13為較輕一粒.5 M1 `4 n. g# _$ A

1 \  a6 _6 e3 _0 R如不同, 即較輕一組有一粒較輕波子在其中,
) t1 a# i% A0 q1 c5 t2 t2 C要再秤, Round 3, 之後便知答案." v% O7 Q0 D4 y( c: x
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e.g. #1 假設10為較輕的一粒. V2 r2 y  l3 |8 M2 C
Round 1
$ |" d* Z5 d4 j2 G1,2,3,4 vs 5,6,7,8 = equal
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. z2 t. M6 j  _; R) K2 iRound 2- b% K: l  d# T
9,10 vs 11,12 = 9,10 < 11,126 F# J# f6 R. v, V) D
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Round 32 S# o7 b5 q9 R) N
9 vs 10 = 9 > 100 z( s4 Y7 r( |& ]8 V
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The answer is 10.
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e.g. #2 假設7為較輕的一粒% f8 f- Z9 z' `/ i9 s
Round 1+ M+ }/ k, n9 L! l) r/ o9 Y* s# Z
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
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% J# z. ?/ T1 zRound 3. N+ _7 f; ?; c* ^# z  T5 Q- k
7 vs 8 = 7 < 8
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The answer is 7.  q( t% h$ R- |) ^1 J( \

6 x: b0 Y3 h& t. qe.g. #3 假設13為較輕的一粒
9 q8 I' g# K- S% E8 i' `9 {Round 1
; |3 v3 c# Z( t. v' ^1,2,3,4 vs 5,6,7,8 = equal
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Round 2
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The answer is 13.
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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 7-121 }# P; z8 k! I- X
if 1-6 = 7-12     13 is fake2 ?0 P5 t3 U) m" F
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if not
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Weight the 2 time $ M1 a" Q! u' ]  E$ R
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Suppose 1-6> 7-12
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. D- }, u8 W7 `0 G1-3 vs 4-6 " z/ B  k) h2 D1 Q. ?0 ?2 M7 ~
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Then Weight the Third$ @! |9 V% l+ t! ?% Y- H* ]4 v
3.: Q9 |! X/ u3 j2 V9 u% [5 t

* Z8 U+ f1 X5 d9 V! l  ~) HSuppose 4-6 > 1-35 j7 b. [$ _% u; T3 s
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Just like the first Step1 `- v+ X% h# v9 n! m

) d1 a4 O. S6 L. Z+ A5 b4 vs 5 9 V' k0 Y3 W( ?* ^# E# z
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 5 r' Q* t! B: L5 ?7 s
and so on......................

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$ V, r2 j( ]+ y, N問題第二步/ ]/ X3 K4 P0 I3 @' l7 V
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Weight 1:  1-6> 7-12) }- T9 t, u" g/ s( u
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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# i# w- k, j' a+ ]  S$ @$ P========================================
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問題第三步& \' A& b5 q" t

) N) o% w2 D7 ~5 [) qWeight 1:  1-6> 7-120 x& M/ c# K- o- c6 C" M3 X

0 b0 m1 ^& j4 M/ K+ RWeight 2:  4-6 > 1-3 8 c0 {4 m, _  `8 R9 O2 u
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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