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
* X7 f/ o6 [- Y  E7 l
, o% l& h8 ]) ^6 q『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)。
) b9 E$ P7 @( ]/ L* k: q& [7 Y) E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？』
" x" _# V5 P; [8 v0 s; x& g
, N* b( _1 P8 h+ f9 ]6 h2 t8 r注意: + R/ r$ o$ j- _3 \, L

+ C+ _. {1 F, ]3 o7 Q( v1. 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
; u6 Y4 m( O  w2 d( [# J, H+ [) m3 ]4 y3 H! G$ N3 X+ U& H
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
. E) x2 @+ n! [3 A! ]6 i; @% u5 J& @4 g' ^+ O" ]
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
3 C* C' Q+ q8 I  A. K; }  B5 e相信e條題目都有吾少人玩...

4 K+ L+ ?' b( y% l& z9 Z我以前畫左個chart去答,
) s8 ?3 }  H$ c2 E, \) i7 y等我搵下仲在吾在
+ |8 }: b0 }" @0 v. B+ A6 x& L8 r4 C3 o2 w7 K$ I  ?# x. L: F2 @8 p
當日用左37分鐘答１２粒波子，差７分鐘才合格。$ ]) ]$ i: _+ z' ?. L9 u/ j
13.........
# A) d6 P+ Y. E
+ v4 n, c8 K2 A4 Z$ d$ I- W) g[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:' D+ D1 l! a0 J

! V0 C$ v: @! {5 M% x  B我以前畫左個chart去答,
: O! `. U+ J; R. v2 h5 q等我搵下...

  F7 ?( D$ _: \5 ~6 A1 q5 \7 l+ T$ s+ u+ p: c
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:- ^0 r- n; J# u: \
唔識隱藏...已經諗到..

4 y4 n/ e3 |  O3 i
- j6 b4 o  U8 b, i4 z, Dsor !!!....e加改左
  s5 Z: u. e& t0 @
6 {+ v6 I+ {0 N+ z+ y2. 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# q% n1 ]  M6 L) G4 y
) k' S6 q5 `# F7 u6 _, W+ Y# Q
[ 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: \9 t  F; g2 C( Q: I7 y  [
相信e條題目都有吾少人玩...

5 i% A5 k% n$ j( _+ t+ \% e8 Y) k9 j( Y- }5 k* A& P! [
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
5 c% v. F5 F  z# c7 C
3 U, W. p+ X! c3 E0 q9 Q& E* VThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:( k# `2 k7 |: v6 ?* l

4 C5 v' }3 m7 b3 o* \+ @" F% o7 N- K3 X* i6 o
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
6 c" j: N" d1 P4 V
; |# K, O; x( M# L* d$ q4 dThanks

+ y" P9 ]$ N8 u% h7 E
- ]8 H: C& d  V% O
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
- D$ S' w2 \, Z0 E1-6 vs 7-12
( d) C6 e. U3 ]7 K8 f( ~4 yif 1-6 = 7-12     13 is fake/ Z4 t3 ?/ a; f& `4 J" u  a9 l5 }
4 W  _8 C: D- E9 H0 h0 x
if not + z/ }) a8 D) d; V
( b, {0 I" e$ t0 _4 ~
Weight the 2 time
( A: k1 K- [* r! u
1 {* I8 u, E. x6 i$ _- J( KSuppose 1-6> 7-127 ?  @% J3 {- U' H
  C) r* H9 K% ^5 c4 Q' @; m
1-3 vs 4-6
( c+ {/ U! o2 A7 }; e. \" g) U: F' I3 {4 H3 R7 K
Then Weight the Third
% W# m. q+ H! g# `  a. y3.* o* E( y$ o7 [. l& }& z
) S. V% w4 L* t! b
Suppose 4-6 > 1-3
. _; v+ [1 O" ^/ b
7 f( l/ `8 ~& n, O& X' _- C2 l, sJust like the first Step0 j+ P- [, H3 d$ H

5 z& i% g5 O3 W- ~" r4 vs 5
. K  P5 J9 O7 Q% z% O" m4 r7 j7 A) Z8 b( R! T- X
if 4=5 6 is the fake one
- p2 }& P9 P: a' k# L. a5 _+ Z% E
" p  n' F4 E5 ?  {1 sif 4>5  4 is the fake one 0 u% R7 ^- P1 G, r. t* G7 z3 H) X  }$ |, g
4 Z' v  N0 F* ^) }% v
and so on......................

hello1997

分3組4隻波子秤
5 A- V1 \: h  h
5 f: V+ j- U2 ]( PGroup A: 1,2,3,4, g: D# F. x- c2 M
Group B: 5,6,7,82 S, a0 n) l6 ]0 g. c7 W& i; i" {
Group C: 9,10,11,12
: N  X' ^$ R4 ?Group D: 13. S% \* `! m9 W3 R
0 @% l' T. a% P+ t" C3 f0 ?+ j
Round 1
, d+ H9 b9 o5 E- o. WGroup A vs Group B
* O% V6 e' v" m6 ]如A and B一樣, 即較輕一粒在Group C or D
. q6 G4 Z& E* n! O' l: O  q! C6 e$ u( ?  D; M# C* l! \6 U$ U
Round 2, q* m4 a3 w$ W: m% A
再在Group C拆成:4 |( {; M& m  {& \5 K8 P
Group Ca: 9,10( j7 |/ H/ l8 }0 D" t
Group Cb: 11,12
! |( J& F& w1 _& _( R; r* ^; _然後再秤, 如一樣, 即13為較輕一粒.
7 c4 W% E! X$ k  @0 x9 U) z6 Z: A" v( X. D' F  _
如不同, 即較輕一組有一粒較輕波子在其中,
) g4 t( J$ E* _) N4 k要再秤, Round 3, 之後便知答案.
/ c1 h" M) {+ l" Y6 V  P) A2 O' F! p- F/ C. Q5 h5 x
e.g. #1 假設10為較輕的一粒
$ U: ~# |0 b2 C6 k9 y0 s0 Q* eRound 1
* J; Z* m. i- @/ U( E1 w1,2,3,4 vs 5,6,7,8 = equal
3 E. g4 @% M$ M$ N, A/ r( E2 o0 K' R6 E) H* G
Round 2
6 O9 g1 y/ w" E0 y+ B$ k7 Q+ ]9,10 vs 11,12 = 9,10 < 11,12
& V* s# P4 P) S  z. X6 A) R$ ^6 ?
" M% w1 [% i& Q) K1 v( ]4 NRound 3
, b7 c9 v8 l* C/ A  i! a9 vs 10 = 9 > 10. R  x5 w) H! \- E; s) V3 M

( E# @# K+ z& P. q& R' iThe answer is 10.4 l/ J% o' H' e, C  b. Y
9 n' m* \' g1 J3 E
e.g. #2 假設7為較輕的一粒! C7 e! W' I7 z6 G
Round 1
& a, `9 n6 s& y3 f  h# r7 v4 g1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8  c  j! G3 u* r# Y$ X% ]) I, F. g, }
7 {! Z; k1 K1 i
Round 2
  H5 y' H  t( r. O9 f% y# g! x6 O5,6 vs 7,8 = 5,6 > 7,8/ o$ V( D' L* j! @% s% x
, Z6 q( H9 B: l/ i+ {, \
Round 3
* j! A: M4 V; u+ ?( n6 c' q! s3 ]7 vs 8 = 7 < 8
7 U7 p+ t: O/ d# d" y
8 R) n- l' ]" P. F5 X( hThe answer is 7.; W: I+ j, K8 _+ w2 i0 _, Q
) n8 C0 V) u  C- I
e.g. #3 假設13為較輕的一粒
3 [6 p; J6 v; I' u; I5 ?Round 12 u9 U! x1 p& R( t! m' Z! i4 \' J
1,2,3,4 vs 5,6,7,8 = equal
8 [. d, [$ {' y& E1 ~, f" o, o+ n7 `( @: q
Round 2
' {, i! Z, H% I0 g9,10 vs 11,12 = equal
# k7 T3 {7 j: T# G2 E
) }* i6 I5 w2 h0 y8 _No Round 32 k9 g- ^5 Z3 P9 d
- m( F8 O7 `: U/ ]2 ]1 B, g
The answer is 13.9 A1 W1 G; t) l; L& q; c# a: E
1 Z4 v6 o7 K& p
唔知我答得正唔正確呢?! " ~; J! L7 z* Z$ R8 p; y. G; B

' n) e/ N+ `$ j[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
! S  C# s0 l+ [& A1.
6 \. n$ J. s; ^/ Q3 n+ P, \5 F1-6 vs 7-12, \( E9 {4 ~4 v5 H
if 1-6 = 7-12     13 is fake' Z0 T/ o* @. M" }

  D2 r. ~/ Y; L+ zif not / h' C: s6 H9 Q7 S4 N
1 R: y' \1 c' w& q1 Y4 n; c; l
Weight the 2 time
4 n* E5 y! h+ {$ F6 Y7 k& j6 K1 O  _# d' |. A4 U
Suppose 1-6> 7-12( F0 H; S8 h' Z$ z( |8 B. E9 _
, {  A. A9 v" m1 _
1-3 vs 4-6 ) g3 r! {2 V2 J7 ?6 J" q8 I
0 ?( _# Z3 V3 M, X9 n  e% H* M3 E0 a
Then Weight the Third
, o9 a' h) H! T; E4 z' l( p3.; r$ x( z+ ?0 [* z! l0 H2 j
- z- ?/ w0 Y6 b! T/ d
Suppose 4-6 > 1-3  e5 t9 s" J0 ^- F
- z8 D6 _1 V: n0 ^. D
Just like the first Step
! B( g: ^$ f; k- C
$ V$ \* T' R$ c9 U" j; t4 vs 5
! T6 _2 l5 `: o  |! k4 Q* q( N$ N$ F, V! J" @
if 4=5 6 is the fake one
) s- _  P  Z, G
9 J9 b/ Z$ ]8 ]. K6 xif 4>5  4 is the fake one
3 M6 I; `0 |1 q3 J* N" \4 h+ ~and so on......................

' ~; c/ b! ^8 r8 f
. }& D& ~1 T& B: V
* M0 d' p9 f5 R' a問題第二步7 {0 D( l& D% M& f0 ~  }# k  O5 ^

6 q" @2 b. P4 ^9 e5 hWeight 1:  1-6> 7-12
; T- d7 O6 W" a% g" p
/ C' u( O+ u' S( v- d$ mWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
! M: {5 R" l+ `1 t/ O( U
, V% l7 U& j5 u; w0 E& F你第三步点去搵 7-12 边一粒???
  s) w! t- [& j& h( z- M2 W; N' p$ I6 d( n0 g) f. e
========================================
5 a$ q( Y9 {0 i$ s# n: ^
7 L, r  B  ?, G7 m$ T問題第三步
( b% X! U, V- I9 N# A+ v1 U1 k: o4 l, N8 A- z6 C
Weight 1:  1-6> 7-12
! \) H% k) l  w! O2 Z/ }0 _
) A. z# h# N+ `+ W$ ?Weight 2:  4-6 > 1-3 % v! [. d6 H$ ?9 S
* d* [" Z! ]7 F2 {5 T( e2 d
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