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! p) _2 m$ \4 t: D! s6 r
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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)。* f; W  j! y7 z; B
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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. ]9 ?& l: c, W+ P) Q" Q0 u注意: # e8 l& q, T. C: u
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1. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
. z0 i7 A8 b3 X1 p8 J0 |7 @( K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,
- W+ Q# P, u% `; U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。
* U# U* z0 P  L) g13.........* E# m1 J9 v3 k' s* {

% i+ K7 S8 _" t. _6 {[ 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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* P0 }1 E% B+ j1 f0 x& f我以前畫左個chart去答,0 r. B1 T2 I4 E$ M1 c, g
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:) X7 I! ^/ F: D
唔識隱藏...已經諗到..

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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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7 f# e: m8 U9 L, j% y8 M) J[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
% Y( e' l, h% m3 d6 M1 c相信e條題目都有吾少人玩...

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! @$ g9 e/ |4 n- I) W$ G2 ^PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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1 s) X2 w3 d( j- o2 G$ m* BThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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. v4 ~3 q8 `! V& rPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 r+ m5 Q$ O# N, a+ ]
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Thanks

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- U4 g3 w' O4 }. v: N/ F不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 ~; e9 o8 H  o9 N: p9 \% B4 ~1-6 vs 7-12
# ^8 @/ i8 h9 F0 a7 Z* ?if 1-6 = 7-12     13 is fake
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if not ! k$ m1 `1 |9 ?4 a

! y4 T2 f& A. D, |3 ^4 Z3 P! ?Weight the 2 time
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* m: a- N$ \  r, KSuppose 1-6> 7-12
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' [7 v0 v0 K# j: f/ J/ [1-3 vs 4-6 / d+ m8 E7 N' W4 w

( ]3 l5 P# E* RThen Weight the Third3 {& m2 c6 K) ^/ Q7 E
3.
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$ o3 W# {% n% WSuppose 4-6 > 1-31 ~* x8 x5 w4 `4 [( t

% S3 d) I1 x$ [; o& @Just like the first Step
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4 vs 5
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! w7 B; o& f7 ^9 `! Nif 4=5 6 is the fake one ) {7 A+ d7 M, Q! l

# J. t) b( q# n+ P9 qif 4>5  4 is the fake one , b; z+ f' I) c+ X" `

. v$ j! W6 `6 J( xand so on......................

hello1997

分3組4隻波子秤* j6 Y& a& L+ r$ s. L: {
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Group A: 1,2,3,4$ r# I6 _/ E1 w
Group B: 5,6,7,8- A8 c$ c: ~7 L0 D, _0 A
Group C: 9,10,11,12' ]' V; n% {; n+ C3 f
Group D: 135 U- O- `* i  \0 u

1 h6 `! V) W  \Round 1
/ {5 t* m0 W1 b+ E, {3 E3 X6 i" k0 ZGroup A vs Group B
! ]3 |0 _$ k  W. a* E/ C1 J# `如A and B一樣, 即較輕一粒在Group C or D; e1 |; |! C; @0 S" M! ~$ H

$ _4 q2 C+ v2 U- ?: DRound 26 \0 L& m% I, v* ^8 s( M
再在Group C拆成:( A% O  K6 n3 F/ A7 T
Group Ca: 9,10
4 B9 S) y7 `" ?& {+ ^# [Group Cb: 11,12
& A* P8 M+ B5 b# g然後再秤, 如一樣, 即13為較輕一粒.$ }* s  _" D0 k1 u0 L% j5 J; w

. d: H6 \" V  R1 D如不同, 即較輕一組有一粒較輕波子在其中,
% I! f  }2 }. _) F$ N" ^要再秤, Round 3, 之後便知答案.
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( B( f' ?$ [, A5 [  _e.g. #1 假設10為較輕的一粒% z, S( H. Y- X
Round 1
* s8 W& f) f; l* Y1,2,3,4 vs 5,6,7,8 = equal3 V1 ?4 j# n  N2 f" B( ?
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Round 2
/ f0 V! z. h* a  }9,10 vs 11,12 = 9,10 < 11,128 m" r4 R' k- Q( J" n4 K& n! W6 v
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Round 3  f( Y% o' o8 Q; h  q! n
9 vs 10 = 9 > 10' w( W& V  }8 E0 \. Y& F. v  s* C

% `3 |- B8 T' e; `+ HThe answer is 10.- ?0 j* _3 Z, O# P. p$ O
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e.g. #2 假設7為較輕的一粒
5 ?  B* l  J7 Y' G# dRound 1
% D4 W  `- g% I+ C  v1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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0 f/ n; E# k8 e% j! y; s1 l! d+ ?5 _Round 2
9 X8 C! u2 F0 x( v5,6 vs 7,8 = 5,6 > 7,8
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7 h0 r9 v1 n% N$ z. B& c9 ]  ~Round 3/ S* ?9 W; F) N( ]: t6 y
7 vs 8 = 7 < 8
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9 [2 {( N2 P0 p& I* S+ l" s& jThe answer is 7.  z" t4 H9 B+ o8 Y+ t% m+ g+ ?5 l" s
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e.g. #3 假設13為較輕的一粒
; _3 H! j( J* E0 U* y( YRound 11 t2 m$ J( F* q: I* Y: O% S. F8 z
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
0 a4 |3 b! z5 i2 ^' w1 ^9,10 vs 11,12 = equal+ Y+ e" c6 T: T5 i2 C
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No Round 3" N6 I) P( V$ z/ \. D
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The answer is 13.! _' G" L: n$ s* w* E& _- ^
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唔知我答得正唔正確呢?!
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3 A' @1 S% [: n[ 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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6 m1 s2 c9 x6 r1 y' G1-6 vs 7-12
1 j# V2 I2 V# U( B6 e' U; Rif 1-6 = 7-12     13 is fake( G2 W, W+ g% i# Q/ l

" a! h( Q) ^2 nif not
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Weight the 2 time
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Suppose 1-6> 7-125 I; K# o4 g# [' r

% ]4 P  W2 P( X# C7 Q+ x1-3 vs 4-6 # u. T- C5 F* ?9 t
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Then Weight the Third' ~; }6 F7 @2 A- R
3.
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Suppose 4-6 > 1-3. ?4 o( Y( m8 K2 y! M5 L2 @
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Just like the first Step
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4 vs 5 , o3 o* M1 v& P: Z' h8 A

# O9 C2 M; Q0 ]7 ]$ |  r$ cif 4=5 6 is the fake one # N; h$ @2 s: ]5 c8 B

4 J. o0 s  _- e$ b- z( s1 x: Gif 4>5  4 is the fake one 1 C2 ^9 \* j. A3 b( D2 Z
and so on......................

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4 ]9 h0 L* M9 E* k1 G& J- C+ E問題第二步
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Weight 1:  1-6> 7-12, q& @$ C' q0 t
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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2 r) n4 O5 u6 s  ~2 }你第三步点去搵 7-12 边一粒???
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! l# f9 F! E( s( b問題第三步% `2 D) A5 _3 G' D, k5 ^* G% _0 s1 u# Z

1 V" Z8 ^- J# C. r" }+ r6 X1 f* sWeight 1:  1-6> 7-12
6 \) [! ]/ w! y" [. v9 x. x1 G1 E
6 I7 s4 T; p* `2 cWeight 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