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( c: a' S6 v! o* ^, ^; m2 O1 K
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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)。* Q$ T5 j4 Q" }$ e* R
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？』2 p* `# c: b6 c
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注意:
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- q/ E* L5 u3 R% V% J1. 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* i$ U7 |$ j; b! O
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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:
! \8 G% C6 C- G; M' U  F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,
( y* J4 B8 q9 n$ c+ h等我搵下仲在吾在( ~7 t1 V. M8 H! M  N
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當日用左37分鐘答１２粒波子，差７分鐘才合格。: G0 U; }0 @4 m& d
13.........  S: A+ y0 O+ ]; p3 R6 L

' j9 C+ h& J" b[ 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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( e* Z% V! d! w2 G1 E: ]7 S1 n我以前畫左個chart去答,
. N* ~8 G  R/ p等我搵下...

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! N- W, I" H9 w- |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:- P# y! ?$ E2 I( E* ?
唔識隱藏...已經諗到..

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( x: B$ B( R6 w$ y0 Fsor !!!....e加改左* L3 ~1 G& d. z# ~3 ]2 J  t0 R0 C

- s. b: I0 o( f: K, ?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:; C, {! t/ x" D. q/ C( B2 L
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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& M% w! |' M: V/ PThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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/ {) k5 G$ d3 \0 `6 GPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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, t4 N: u' u4 y) n7 \: v9 DThanks

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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/ }* R" U4 g9 Z2 m: G5 M2 l
if 1-6 = 7-12     13 is fake7 r2 Z/ \5 v7 C+ f, f
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if not
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' i& ~: Y+ Z6 @Weight the 2 time 8 u; q: M6 w) v: p4 c3 l, F

* {% n; a4 Q, M1 z6 K0 U; RSuppose 1-6> 7-125 V, o3 G3 L; ]; U# u! I
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1-3 vs 4-6 2 Q* a/ q7 [4 Q! F( p: }
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Then Weight the Third
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+ S! f* K; t/ w% O8 B- U8 f( B' A+ a3 l6 I9 e; ]& Z* n* f
Suppose 4-6 > 1-3
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Just like the first Step& K& P, X  _" P- i
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4 vs 5
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. L; X! U+ n! z0 \" |$ l* Yif 4=5 6 is the fake one
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9 N' a& w, B) C5 n* o- `: ^if 4>5  4 is the fake one 3 W2 r8 E" n& f
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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
! _) E- Z/ R4 n  ~1 V& IGroup B: 5,6,7,8+ E" t& v' q0 T6 u0 V0 L, D+ T
Group C: 9,10,11,127 M+ @/ @6 W6 u) I3 }4 R
Group D: 13' h- O5 [: L  K- M
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Round 1
: l" }6 E/ o; V& v/ W5 U* fGroup A vs Group B
$ }+ \! {$ o  T如A and B一樣, 即較輕一粒在Group C or D4 v) k& J, I$ L6 x7 q8 e

, J9 D( `3 W% g! t) `- Z" ?7 sRound 2
) W7 N7 ~5 F* V; s$ d再在Group C拆成:
7 Y& `) D" `% d: o1 f1 d! B. XGroup Ca: 9,10
/ Q% `8 H/ t/ I( D" SGroup Cb: 11,12( m* p' Z8 R7 ~
然後再秤, 如一樣, 即13為較輕一粒.. o* {! g/ k5 M+ x5 v

8 f& O  J& M; m4 r( i如不同, 即較輕一組有一粒較輕波子在其中, ' N5 Z& B! D+ e  O: b
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
0 E8 g- Q5 N* _5 g6 r$ @" x$ oRound 1
! @( L, m8 v! [  j- b( O0 [8 J. r( a; I1,2,3,4 vs 5,6,7,8 = equal
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Round 2' Y" o/ }: |4 d7 U2 I
9,10 vs 11,12 = 9,10 < 11,12
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' Z# |# L5 ^) V' R( g- VRound 35 d+ P: @- k$ A9 A8 ?% }8 `. l( Q
9 vs 10 = 9 > 103 P" n1 |2 |" @- U" ^: R: a
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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' y2 A5 M' Z: \Round 20 f* N9 k# O5 Q! N
5,6 vs 7,8 = 5,6 > 7,8( H  S# l+ e% h3 X6 Z/ Y

  k/ I) a  X) \' {3 ZRound 3# I: o# P7 q: P3 g1 H/ R
7 vs 8 = 7 < 8* B. B, g# i6 }5 G6 C

+ h5 e6 d7 p. ]( i' R  q. r, BThe answer is 7.
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1 `7 z* J8 v6 [% Y$ b+ D2 ~8 D7 H- me.g. #3 假設13為較輕的一粒
4 r9 o. J' ^- VRound 1* ]( Q. o* M. m/ B
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
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( K! {/ q+ Q+ W1 }No Round 3
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) [/ `& u4 ?$ M) `4 V0 V" F( r1 c" R" Y0 jThe answer is 13.
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唔知我答得正唔正確呢?! : @8 s; G" a* b9 `( A/ n0 M

0 Z3 U+ D( v6 ]8 l[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:( v  H; Z7 I! _: K6 Z& X
1.
0 s- h/ T" V8 K1-6 vs 7-12
# l# V5 @# G+ a/ L$ g' `( yif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 9 e& R: ]8 G6 O) Q  d4 O0 d# E6 O

% D! B7 p6 M* B, n) k# s' k* L" z" sSuppose 1-6> 7-12# U/ T& G2 n. X' L
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1-3 vs 4-6
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Then Weight the Third& b$ H, e1 l1 V& H  c( |. ^
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Suppose 4-6 > 1-3
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Just like the first Step
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, L% q: N) Q0 _4 A5 b# B4 vs 5
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) h; z& E) |" D6 L; Z( Vif 4=5 6 is the fake one
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* r$ X0 G0 N5 X$ k8 G2 G5 Iif 4>5  4 is the fake one
1 B) R' E( {8 C6 C! P  Cand so on......................

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問題第二步. f- Y* V, W8 h: t2 I

2 Z/ x2 d% W! DWeight 1:  1-6> 7-12
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# y1 G* {7 ]- N$ m, h, Y; aWeight 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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========================================+ |0 F, X" j+ J2 k  q2 S6 ]
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問題第三步% T" P/ C+ b* W" w! u, `

6 G! v- F; h' [1 D: R1 tWeight 1:  1-6> 7-12
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1 u) f. J/ H+ I; g1 AWeight 2:  4-6 > 1-3
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. A1 N; M. g3 X4 O& j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