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/ F% i; m% R! s/ ]% U

$ f  ^  {0 B- a- \; {. N『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)。
$ H: q" M/ q* C8 R- U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？』" v% I0 f; n8 ]# K

; Z1 L% d& B) j, J3 |- F2 J注意:
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) {7 M" p" ^8 Q6 c1. 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( q3 D7 e$ v; K0 L7 x: Z- X
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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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5 U" W0 I" w8 M  d* \- O# E' y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:' B6 _4 G! H5 \7 K
相信e條題目都有吾少人玩...

* Q; B# }0 ~9 I; h% a# s- Y我以前畫左個chart去答,
7 G. L! ]8 @$ Y" W' N6 c0 @等我搵下仲在吾在
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# [# l8 c% l* o$ |當日用左37分鐘答１２粒波子，差７分鐘才合格。. r0 b! g: I0 C/ D
13.........- C7 {/ C( K" Z6 j6 G
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[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:, W) c% i' K) A# a! v" L

# j- e* R! Z' I& A我以前畫左個chart去答,
/ D/ e2 o' I) `$ |5 o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:
4 x- @5 E9 C4 U唔識隱藏...已經諗到..

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sor !!!....e加改左. P  ^( d' Q: @% C! D# i% I
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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7 j9 t) J7 z1 U& u. O. U
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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:
- Z: O* J6 s2 ~相信e條題目都有吾少人玩...

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0 h$ _# \2 {# U& a7 ~' hPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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: Z! ^3 M) b/ V; I5 X8 j6 s( C# eThanks

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.& l! C- {2 m& C1 `% a, S: r
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Thanks

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' _- w: X8 C1 v, U8 j& a  O不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
7 ?+ _* K! v: [! d- C# U1 y1-6 vs 7-129 c4 _3 g: z, t5 k* U; e# }
if 1-6 = 7-12     13 is fake# f& G# }8 J- I9 E2 ]& u% K
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if not 3 L# D- N+ k: q" Q0 g
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Weight the 2 time " U' `+ F4 k0 r2 N0 I, w

' h4 }! `# G3 q, ?Suppose 1-6> 7-121 }" T" k, S  t0 x) Z

* b7 b& ]2 l. I& a/ h4 c1-3 vs 4-6   {# r0 v) Q$ z- N( }

- t/ l2 \: [, z) v& EThen Weight the Third
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/ ]0 }7 [. z+ w1 e. }; e* c. g6 G8 \. x# c/ S+ O5 a  G/ }
Suppose 4-6 > 1-3
  r; D/ R4 ?: }: s8 l: T" I( D( G( }; f. V# `
Just like the first Step
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4 vs 5 : g1 u- ]9 {8 I5 H

$ B) ]: P& L$ x8 W- F0 eif 4=5 6 is the fake one " d& h2 d  f8 P5 d% [: @
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if 4>5  4 is the fake one & U0 t+ K9 p, ~* B

. A( i- V1 u- N% W! E3 d2 v; yand so on......................

hello1997

分3組4隻波子秤* c# f" E/ ?+ h; ^
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Group A: 1,2,3,45 `- e1 t* X  I. L% Y# s
Group B: 5,6,7,8
- c- R1 \) m3 X6 r/ g8 n1 iGroup C: 9,10,11,12
5 P" b' Z9 A7 l3 v* T9 b9 H  |Group D: 13" N/ y# J1 n1 [0 N/ O2 E( T
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Round 1- K% ]4 J6 Z) z. y: j
Group A vs Group B; ^2 p% s" X; `6 J1 ~' A  T
如A and B一樣, 即較輕一粒在Group C or D# c# E3 V/ p: @) X% X

2 ~! x# |3 U8 E) o, r3 XRound 2
0 a+ A$ i  o5 v/ u" |再在Group C拆成:, @* m0 r3 P! u7 `& ?1 g* z5 f+ }6 y
Group Ca: 9,10
" ~) b: M5 i( i! x" c. h$ ^* S6 i& ~6 dGroup Cb: 11,12
8 [! P: L5 S7 Y+ L: I然後再秤, 如一樣, 即13為較輕一粒.. _) D) G3 A% T8 K8 W

, t" t2 w7 c5 R5 S6 I4 W如不同, 即較輕一組有一粒較輕波子在其中,
2 b8 v8 E4 v9 F2 k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
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1,2,3,4 vs 5,6,7,8 = equal
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Round 2
% G/ S3 r$ Z8 {0 w. Q( q9,10 vs 11,12 = 9,10 < 11,12
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Round 3& W$ [- b- o3 P+ y! G
9 vs 10 = 9 > 10
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  ]( @% `6 K- z3 @% D3 T& m* ^The answer is 10.
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& N$ k3 u9 w* A6 s3 Ke.g. #2 假設7為較輕的一粒
; g  E& L/ r7 g# q8 j! [Round 1
6 d" x# E" n" o$ w1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* Q1 ^; w& i# B7 J/ n
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Round 2
# `( z  b) p- t; J5,6 vs 7,8 = 5,6 > 7,8! ]* L* A. A$ d- \0 u
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Round 3
  ~  L; }7 _+ O1 e2 s7 vs 8 = 7 < 8
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The answer is 7.: y  ]; S! e  F' b
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e.g. #3 假設13為較輕的一粒
1 h5 j8 c$ J) Q! x' lRound 1
& c) I7 b( x7 @1,2,3,4 vs 5,6,7,8 = equal2 Q# |! I( G% n4 `' m/ H1 F0 M

- M+ a2 {& ]/ X* o1 URound 2
7 ?! C4 V9 e" k$ n9,10 vs 11,12 = equal& N3 a+ [, l' G% o

$ ~9 \# L  i- F/ w2 ~No Round 3
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) n! a" k# n! w$ KThe answer is 13.) c/ _+ |/ H2 \; ]

* I2 L& q; v9 q8 O& h8 B6 I唔知我答得正唔正確呢?! + ]! M' g' ?# W9 ^/ p8 t$ r

6 E5 B6 s+ c3 ?0 D- t6 X3 o[ 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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* r2 B& X( r% R8 R& A" D8 N3 R+ k1-6 vs 7-12
6 a( S+ e/ A  b: Q/ pif 1-6 = 7-12     13 is fake
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" k" ^3 I7 M0 h% l5 zif not
$ q# y3 C4 u) m" E5 D2 C6 k, Y$ `+ [! A/ ]3 Z+ [
Weight the 2 time
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Suppose 1-6> 7-128 K) K) g) e9 F: s+ W9 g

+ d/ b7 r9 \1 J- N: N1-3 vs 4-6
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Then Weight the Third
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2 B, E" G# o: _- w& b' F/ o1 }4 }6 M4 q; L6 a, d6 Q
Suppose 4-6 > 1-32 p4 }6 l" D! W) S2 R! d1 j& K

  @3 P4 O: C6 i8 QJust like the first Step( S$ l* X& \  w8 ]9 e' z; X

7 ]* D" _9 U9 Z$ `7 f4 vs 5 . l6 Z' b& g7 o  v/ _6 Q3 d, q5 e

( s0 }- N) A& J0 m& l5 n& Gif 4=5 6 is the fake one
( x- F5 r0 j5 b  ^) I* n' M! b# O8 `! D9 H/ ]% i9 L1 S: t
if 4>5  4 is the fake one
$ q1 y- S. M% I* y, H0 E. T6 qand so on......................

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問題第二步% x. G$ ]7 ~4 N5 C. ^  V* q
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Weight 1:  1-6> 7-12
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; n  z& |8 E' v, U# YWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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5 e! l9 O0 I6 ^3 f7 c你第三步点去搵 7-12 边一粒???4 h' f9 ?9 B, ]& C

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* S# W: e4 @  ?" K" ~1 x0 S問題第三步8 c6 o3 U6 e! D: Y  a

$ y' J5 y+ G" E, |Weight 1:  1-6> 7-120 ]9 v( k) e+ V0 @2 K- R" i

( a" ?) ~% q/ rWeight 2:  4-6 > 1-3
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8 E* D0 B7 @# T; v; f+ L% o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