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6 l% P& s) d0 O& z. S# v
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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)。: J7 {7 T8 F1 ^7 b- k0 G8 Y, O
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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注意:
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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; E0 _. i5 h; z8 m2 M

7 \5 \: v: S1 B- T: R) C2. 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+ a5 c( h% n7 f
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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:
" m6 d2 G) p8 o! J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# i2 O( O( R2 T# i等我搵下仲在吾在+ I  q+ W& {- V# c% m* _4 }
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
6 H6 z. o5 x' v, d13.........
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; a$ O1 L; c; S( n- n% d3 x; T( s[ 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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& w0 s6 N2 I% j' t我以前畫左個chart去答,
6 ^' u1 I, ~  i  B9 v$ R# n等我搵下...

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9 {( R  ?5 D7 {8 {4 ?1 R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:
# `" o8 k  ?% v4 J唔識隱藏...已經諗到..

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' Q: ^3 Z. o% J. usor !!!....e加改左0 @" t4 F  W& S3 \' y- t
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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' B1 `* Y! Z4 j  a- N' x
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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:  T8 V! W5 V9 }3 q- _  e$ N
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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:5 R# i/ ?* b$ _3 z( `
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.1 R# Y8 }  W% T  g( o1 s- i+ I
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Thanks

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1 j- ^  w* A+ L) O) w" E2 p不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
7 v6 A1 x7 V, ]  o0 O1-6 vs 7-12# v# t3 o. t% {# {0 L; u
if 1-6 = 7-12     13 is fake
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if not 7 w/ f0 ?. W' b3 |

6 C5 G' j5 d' n5 ?; EWeight the 2 time ! T* B) Q7 u. n- E/ k: p8 u

. z7 S- _3 o! k6 z5 A5 uSuppose 1-6> 7-12. S* J$ a( t* p0 X- d! X& d3 ~

# h( k, m9 Z! F. m4 }& X1-3 vs 4-6 5 G. l# w, m4 o6 t1 Y. |

4 T  }- |( V; m1 H6 qThen Weight the Third
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! M; {0 f  l+ QSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 4 `1 m: x2 A; C8 D+ {" A

& J* ]( r% {7 C' \( U) Vif 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2 I  z- a5 q9 Q& j) n; i# a. P
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Group A: 1,2,3,4
, E. `7 u# u2 _) x; AGroup B: 5,6,7,8* G: w( Q& h4 x2 \
Group C: 9,10,11,12$ y6 @) F3 r% {7 q! ]
Group D: 13
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) M; y5 h, D9 Y6 _' H: ORound 1
& _! A  n% D, z( A, O, [) DGroup A vs Group B3 f  N! k( q. M. i3 Z
如A and B一樣, 即較輕一粒在Group C or D$ m. v  k' j& a# m2 R! x& g! G

* P4 c$ V7 t: n# v# LRound 2
: A9 x  Y" I7 [! p( l" D; x再在Group C拆成:+ }; f1 j4 }5 c9 w# h
Group Ca: 9,10
1 V. M5 |) ^8 M4 W  B$ ?& c0 wGroup Cb: 11,12' I9 g" n) u" s8 _
然後再秤, 如一樣, 即13為較輕一粒.' _  L$ ~/ S' ^0 a6 I
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如不同, 即較輕一組有一粒較輕波子在其中,
/ v6 V% E2 |, @要再秤, Round 3, 之後便知答案.
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! g7 _' l+ X, D- m( b/ x# w' y, ke.g. #1 假設10為較輕的一粒
7 C9 |) T, G# |" x; G% XRound 1  e! I8 i" _. _$ ^9 I& e$ ]' K
1,2,3,4 vs 5,6,7,8 = equal
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& T2 E6 [; t2 P, FRound 24 _- D4 C3 y2 p9 G. u6 g) ?
9,10 vs 11,12 = 9,10 < 11,12! e( V/ ]. _) |9 w

9 E0 o4 v; C& h# CRound 3
! P( m' G% [3 T* q: d9 vs 10 = 9 > 10: K' m% |+ D" @1 r* r$ k

& m& U) c: u2 P  ~9 uThe answer is 10.4 E/ W, ~0 U# X. p; U
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e.g. #2 假設7為較輕的一粒
/ N9 `" z' }. X& M( mRound 1
* D7 o( z  d! T0 w& k  }* U1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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6 w  g4 V1 p7 R; }% m3 mRound 2
8 P9 w' I' M3 ^) |; J. t5,6 vs 7,8 = 5,6 > 7,8
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Round 39 Q0 ~/ x; \5 R8 D3 L
7 vs 8 = 7 < 8; z" Y9 D/ _- R
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The answer is 7.6 y% K! e: H& B: x
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e.g. #3 假設13為較輕的一粒
  ?$ ]6 B% e9 I, f" G$ ?Round 1
; V/ s; @# j8 p8 h# B1,2,3,4 vs 5,6,7,8 = equal3 {3 c2 t" M! z: p- I2 M% S
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Round 20 d& z1 m) N2 v9 ~: I, o" |. }2 S
9,10 vs 11,12 = equal
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No Round 3% I+ ^! Q5 g8 J! G/ W) b# \

/ O* U1 L5 g; D9 Q0 X% t% n4 OThe answer is 13.( `' Q: F4 b& T7 G7 s" t
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唔知我答得正唔正確呢?! & Q! i& M/ I+ f: Z9 w
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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 7-12
! m* C1 o& x% W& i" A6 Rif 1-6 = 7-12     13 is fake) K! @% F6 A) t! M" Y9 k; ]

9 z0 Q% l- [" `0 K; W5 nif not
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Weight the 2 time ) E) m. t* A, n* q9 X5 H6 \/ K

) N! _% g$ W. E0 u1 x9 k' n  E+ pSuppose 1-6> 7-12
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* U. N" N9 V2 Z. Y# w1-3 vs 4-6
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4 k! A. d8 d/ g: j! Z" \% e; r- jThen Weight the Third$ D0 x0 w( _& q4 b$ \3 N
3.
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Suppose 4-6 > 1-3
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* C2 c0 s. o# A: w1 L$ n( _Just like the first Step
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' A' K7 Z, [- c& c/ [4 vs 5
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8 D  W6 I! M# o0 xif 4=5 6 is the fake one ! |% e0 e4 ]- [$ p, w) @
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if 4>5  4 is the fake one 6 A; r4 n& m4 ~2 H; J7 d
and so on......................

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問題第二步
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# Q2 ^: c1 H$ N0 w  c5 _% JWeight 1:  1-6> 7-124 G; F" M, S& H5 c# n' e  g
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-66 m* X& C+ t% Z' K- C1 T7 u3 |

% @  ^8 r9 S) d你第三步点去搵 7-12 边一粒???- [5 i) z4 h7 ^. @

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問題第三步
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9 ?* o! T# S* X- c! z, h' F# Z; @Weight 1:  1-6> 7-12- K7 q) E; Z/ A& ?+ L# k

+ U1 k0 K% G. n: H: k$ r9 e1 B8 bWeight 2:  4-6 > 1-3 & z/ c! n1 w$ s

5 J* C/ L; e3 H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