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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" @0 }4 R" K7 v, O『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)。! O1 B2 \' _  d- n& ]/ j9 o$ n/ C0 A
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？』8 @6 |$ c/ q3 P* l8 S

7 D+ a1 {8 _0 U  C/ Z# D% q1 K( ]. v注意:
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; p0 H3 _/ s2 r+ n1. 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
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: C2 Y' A7 F" r: C4 j[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:) z1 Y5 |! A: |) B# k9 i
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,6 k* F6 f. M+ [
等我搵下仲在吾在
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; e& s' [8 f& ~8 p0 y: ?7 x/ A5 ]當日用左37分鐘答１２粒波子，差７分鐘才合格。, [7 i) m( J# v/ P; l
13.........
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9 T& Y" }4 h/ ^# u+ s+ ~0 z- ^[ 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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4 t1 o0 h- f2 n7 W# p我以前畫左個chart去答,7 |4 _8 z8 P+ K4 y2 P
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:
+ h7 p" b: s! n唔識隱藏...已經諗到..

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) q9 `8 {( T5 _sor !!!....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:
  S+ k: U: C6 f$ Q% b3 Y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.8 n* E5 I) ?2 M' H/ w, x
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Thanks

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.
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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.
# a0 _$ O9 u9 \1-6 vs 7-12+ b: D. X. R# J: k4 k2 b* v
if 1-6 = 7-12     13 is fake
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7 E6 e" M' E; F& ^2 Q- I& vif not
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Weight the 2 time ' F; g0 }# }3 p- c$ H8 }& S
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Suppose 1-6> 7-127 P7 H+ z+ w# Z
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1-3 vs 4-6
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Then Weight the Third$ j+ P7 g2 K, a# X' H% J
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Suppose 4-6 > 1-3
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) @9 }3 P. Z* A) d, z7 O& k" J* i- BJust like the first Step5 {- ]  ^! Q+ z" P- C: U
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4 vs 5
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& h7 A5 l- J: D+ U$ l/ m+ `! f1 r4 j  uif 4=5 6 is the fake one
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( U: a9 E/ I+ e+ L6 F+ Rif 4>5  4 is the fake one ' X7 z2 }: B$ K* h; d7 T0 v3 I: z3 r
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and so on......................

hello1997

分3組4隻波子秤
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9 H+ Z' J# w3 h% J& O: {" Z( I! GGroup A: 1,2,3,4
4 k0 B, J5 v2 e) FGroup B: 5,6,7,8) D8 Y) }, o0 e5 h  h& y  b
Group C: 9,10,11,12! |1 T1 d8 V! S! w
Group D: 133 H& N- P: r7 m( G  g3 P
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Round 1
. ^% m1 B; T  i+ v7 x- M+ GGroup A vs Group B7 Z- h3 d( q3 b9 y! N' C
如A and B一樣, 即較輕一粒在Group C or D) [- Z7 l/ X7 O; \# ^1 L! N

4 k" A7 s' W3 i8 Q: A' t3 ?Round 2- [% ]' S* e! d; y5 N+ B) p% P6 Y( t
再在Group C拆成:
6 _) V, t6 j; C& `, c1 OGroup Ca: 9,10* M6 _: |" {6 ~$ t3 V* P
Group Cb: 11,125 ?; \  u( _- K# ]7 P
然後再秤, 如一樣, 即13為較輕一粒.
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6 d; x% M8 d8 O( M' {( F1 f如不同, 即較輕一組有一粒較輕波子在其中, 9 R0 t6 R5 Y  O8 J" B( W8 k
要再秤, Round 3, 之後便知答案.
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+ E( s) V( x2 K1 ?7 `e.g. #1 假設10為較輕的一粒
/ r3 m7 |& |' X) ARound 1) S: T2 b! b- G: S
1,2,3,4 vs 5,6,7,8 = equal, g- v3 n8 _7 Q& ?5 n$ D
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Round 2+ v. T: L  I& D( B# e
9,10 vs 11,12 = 9,10 < 11,12+ }4 U" }6 u4 P: j  E
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Round 35 X7 C& L& A- v8 o& [+ c( c, e$ ~
9 vs 10 = 9 > 10, R& T# o1 F& ^/ x7 i

* X- r" K: W+ w7 R! Q3 h# T9 e* A1 hThe answer is 10.
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$ G& S$ w; Y* Ce.g. #2 假設7為較輕的一粒
+ B! U& I5 r+ y  \+ i6 L8 `. ~" GRound 18 k' \- h& A# E/ T, e/ K2 ^
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* X( Z$ e! B2 R  p
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Round 2
. i; k! ~0 l, @2 ^( x( [' }/ j5,6 vs 7,8 = 5,6 > 7,8
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Round 3+ a6 s0 `3 G: G. q; Q6 z$ a
7 vs 8 = 7 < 8- q, k$ U# p, a9 |) e/ k
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The answer is 7.% A. w5 `, ^; G; O; R6 g
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e.g. #3 假設13為較輕的一粒# |! [, K& Z( a
Round 1
+ |) `" t( D1 ~" }9 Y0 ]4 `3 r1,2,3,4 vs 5,6,7,8 = equal" s- R- J' X( I; P
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Round 2
& z: t, e0 j/ |! X6 ~/ r4 S9,10 vs 11,12 = equal9 C  i# {' J9 K3 ?. ^

% e/ Y% u3 |- D; ?6 }, u/ ONo Round 3* }! u/ E' |' R) ]/ P" ?8 M' a' c
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The answer is 13.( E2 p5 [2 ?, C/ Q

! ]: I% ^0 \! @8 W- c/ d+ K唔知我答得正唔正確呢?! 5 T; M" n6 f7 C- A: s3 X
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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:  ]" u* l  s5 ], S
1.
  N, d3 A) @- W0 ]1-6 vs 7-12! V4 a/ R5 }( W3 c$ i1 w
if 1-6 = 7-12     13 is fake9 r" ^' m% U  h0 H4 t8 H5 Z( v. k
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if not   g- O) m5 e. J0 E
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Weight the 2 time ' u# _( D6 p" J5 H

8 Q8 ]- ~- j  T7 XSuppose 1-6> 7-12
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1-3 vs 4-6 % e! [7 g( F4 A# \2 n( P
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Then Weight the Third
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7 U2 o! L5 V* ]3 RSuppose 4-6 > 1-3
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Just like the first Step6 G3 Z; b2 v) h& Q+ ?
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4 vs 5 . W- g. Q2 e. M% v+ O; _
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if 4=5 6 is the fake one ' i2 i- R  q* l  T6 d$ G4 i. F
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if 4>5  4 is the fake one 2 ?$ o' S& l* M" O+ Y  c
and so on......................

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8 ]) G6 S  d" W& Y8 r問題第二步# K# @, J5 F$ J) P. b8 q

+ t: ~+ ^8 o8 l2 S0 o1 @  xWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-67 X9 p+ K9 `3 J, L
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你第三步点去搵 7-12 边一粒???% b* t% o2 I. h
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問題第三步
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' x' H. i) K' R( RWeight 1:  1-6> 7-123 B/ i  S: c* [8 ]
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Weight 2:  4-6 > 1-3
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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