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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* l! ^  ]2 q2 Q( v『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)。
# Q2 c8 Q% p& I, n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？』% ~  X4 |! m  R( R: |' y0 Z5 C

& B! O7 k- ~7 j$ b4 ?" |注意:
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4 F/ Z! C, @* z2 \' Z1. 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  G2 J- V  S" o" W

, k* z; Q+ M2 ?& t9 w8 n" d* Z* P, k2. 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& j$ N9 q( P  `: o2 s# v2 C

3 I/ ]& z# `  e[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
# k( M( O" `. {: x6 [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,
: F( V9 U7 B, @* G# y4 U, a等我搵下仲在吾在
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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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# a) C& H( r6 @, P+ ~4 |[ 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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! t4 I2 D- j, }7 T+ F我以前畫左個chart去答,  B! G, x( }+ @
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:
6 t4 G9 X; T3 x- B唔識隱藏...已經諗到..

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sor !!!....e加改左
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# @4 t4 x/ O- o3 L8 O2. 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$ o* }4 a) p" b
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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:
) ]/ I2 [9 r! Q, I相信e條題目都有吾少人玩...

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% f  I  K" v8 j1 ?: |( PPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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# k+ h4 |, g& G- E5 [" L1 b8 ^Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:* \  v6 a& M" I' A$ {  U

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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5 y, p- A, d7 B% MThanks

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+ j5 i& A  t$ O: E; P不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
/ ?0 _$ _" @( c+ z( y  M, @1-6 vs 7-122 ^" m- K' u; z7 q' t( {) F2 s/ A
if 1-6 = 7-12     13 is fake
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0 o; n$ l$ T) X. t  _2 {$ [4 `if not
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4 o# `" A) n8 \; _  ], I! S1 Q# Y, VWeight the 2 time
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Suppose 1-6> 7-12  h( }+ N8 o. t1 e
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1-3 vs 4-6
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Then Weight the Third! v; i% \5 _: \- n" F4 F0 b$ G* X
3.
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Suppose 4-6 > 1-3
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0 @& V' A/ M1 b+ q$ N# EJust like the first Step
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; G4 h8 k" h8 }- t0 M. m! ^4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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& O; i% K% ?* W" k# R2 Gand so on......................

hello1997

分3組4隻波子秤% {" S7 f+ V: X/ @1 `) g
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Group A: 1,2,3,4
1 ]; L+ b7 T) XGroup B: 5,6,7,8
6 z/ ]( n6 Q; v+ k  @  WGroup C: 9,10,11,12
9 C! C) R0 w" \Group D: 13
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Round 1
* B2 V0 y7 o0 e4 U7 N3 ^Group A vs Group B9 j! x' G$ O8 V3 ]3 @# w8 _
如A and B一樣, 即較輕一粒在Group C or D
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9 g! j1 n/ R$ Q  XRound 2. o* r) D$ l9 [: ?0 }1 g% z$ ?$ c
再在Group C拆成:
$ l4 q- ^% c7 ~. z  }8 N* J% ^Group Ca: 9,10& D" X1 ~2 T/ r9 E
Group Cb: 11,12# c( n5 G" U; r" I  Z- f4 p
然後再秤, 如一樣, 即13為較輕一粒.6 }; |; y+ w! T- R" P) A7 k) Z

" G' M, z% D" |* z+ h7 r如不同, 即較輕一組有一粒較輕波子在其中, & l7 y1 a9 P+ _2 o1 H
要再秤, Round 3, 之後便知答案.
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. ~$ z9 H9 D2 D7 be.g. #1 假設10為較輕的一粒# n: p+ `" x  E" o; I- I- |
Round 1
) r) W/ i# G/ g& H0 @1,2,3,4 vs 5,6,7,8 = equal# g% p& x" y4 v, `
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Round 25 h" q& |$ Q# E. R
9,10 vs 11,12 = 9,10 < 11,12% s5 }$ d3 }* j3 d6 X5 Z7 `
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Round 3
$ N1 D; d: W* [0 J5 [: I  R9 vs 10 = 9 > 10
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The answer is 10.2 i9 B- v5 A( M: [6 i) {

1 Q; B' ]' q" _5 u: F( s7 R( xe.g. #2 假設7為較輕的一粒+ I4 O, J1 \2 C  V: M
Round 1. H. L" W# |9 K3 M; y
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,83 q: R! v+ c# Y+ _! B, F

- x9 G  v7 `" F+ ~Round 2
8 ^+ U, U& C  E" W5,6 vs 7,8 = 5,6 > 7,8# k2 C& }2 ~+ a! F* w" M

; e3 E- B$ ?; M# Y9 D& |Round 3
+ \  ]. a( Y# C2 _7 vs 8 = 7 < 8
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0 q2 a4 F4 K" h% Z( K& }The answer is 7.! o" T7 j. ?9 A1 Z7 J: l
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e.g. #3 假設13為較輕的一粒9 d0 O. K0 Q5 m
Round 1( n0 O+ a: ]+ M
1,2,3,4 vs 5,6,7,8 = equal7 k' T+ u5 }" W; ~3 ?: P
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Round 2
% W7 h- x' J. e6 s9 z& R2 p3 K9,10 vs 11,12 = equal- S7 B* _* V2 p4 g* y* x/ g2 _5 c

4 r' q+ w1 C. Q2 ^. A$ GNo Round 3" r- e/ I* ?9 L$ ^
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The answer is 13.
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/ _" d2 }" o+ r) t' A唔知我答得正唔正確呢?!
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& M+ h' a: D1 s# k2 E3 E  G[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:5 T" p' M; l$ i0 O
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1-6 vs 7-12, A4 _8 s* w9 V% V
if 1-6 = 7-12     13 is fake- s+ j7 _/ y* X% i& |2 j- r2 a
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if not % N0 c) T0 B1 i8 q; h8 J/ p
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Weight the 2 time + u! p5 V9 u) C- G$ L

2 V( n& A# m/ l, ySuppose 1-6> 7-12
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) v+ p6 q: C2 K1 P+ V4 c1-3 vs 4-6 3 P  V. D/ O  ~( K8 |; Q& s% f
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Then Weight the Third7 L: W) ?  z) E" ?
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Suppose 4-6 > 1-38 b# H6 b7 L% U! j+ d6 a4 N
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Just like the first Step7 B2 h0 Z! X/ J  E
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4 vs 5 9 J7 L! }2 q! e; H

. q% z4 z6 [3 Mif 4=5 6 is the fake one
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8 i# D9 F+ I" C8 h6 D9 k" [if 4>5  4 is the fake one * D( z% B- _# T  n3 T
and so on......................

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* L' E5 {2 k; i. c/ S! a9 U2 e2 F問題第二步: Q9 u; b& }1 x6 ]* Y
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Weight 1:  1-6> 7-12& X# }5 v6 R  ]

% o4 O: j6 ?9 v& vWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ _. C! G  J# z; y# K
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你第三步点去搵 7-12 边一粒???- k5 Q; k# g# W; `, r

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問題第三步
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Weight 1:  1-6> 7-12
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, j  O7 m2 c% L8 s: F( `5 BWeight 2:  4-6 > 1-3 : \4 i9 R/ B3 V  B

; W" Z2 k, |9 b% V4 y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