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( }8 f. ?; l, s8 d/ C  H/ G

  p- M8 R; p  W2 |『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)。
+ b# H; E3 J, X% Q, C' n% g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？』
2 ]) |, k9 N% t" t5 r; c# V! J. W& C- @/ F2 |3 {3 A
注意: ; @9 O1 [/ U( ]/ l
, g% L9 Y6 d9 n& S9 v0 T6 D! {2 F" A
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, l9 N9 R  M# B" \/ |3 R- K4 y

* ?% T/ I& `) 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
6 b4 W' F+ r  i( I9 @' U  t+ R7 T2 r" q
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:- g% [$ g5 b# R" ^
相信e條題目都有吾少人玩...

3 z5 }' |: \5 Z, p7 O  e
我以前畫左個chart去答,. m& @5 h$ Y( K( p( N: T- K: Z. _
等我搵下仲在吾在9 X$ w+ W7 Q. K2 ]8 i, c; J
/ p/ ~- v  G" R  T* |
當日用左37分鐘答１２粒波子，差７分鐘才合格。  G5 `. a; g; r! j% Z% N
13.........0 n* \. v, ~1 L) E# Y  r

: [5 R# q" P3 p3 `[ 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* ]2 l7 e: m7 M- Q( c0 w
1 J+ q5 |4 ]3 @+ B% d
我以前畫左個chart去答,2 k$ a0 Z& p) A9 D8 u
等我搵下...

+ x9 Y0 s& Y5 k
0 y, S' {6 a6 }& p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:* R- V+ f9 a0 H0 I! l; R) b: ~
唔識隱藏...已經諗到..

* {( b4 E) A& ^8 l% T

4 r& G7 c5 V1 t2 ^, gsor !!!....e加改左- o. L' p1 `. Q6 ], s. P

& p" N2 ]* ?5 k/ I' U2. 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
; U+ o& D- r" y% p) |% T, K* i0 Z; I* y3 Y9 M( N
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
; S. m) ^# R  u3 }8 ]. F相信e條題目都有吾少人玩...

3 t" b0 ]3 i" b7 ~

' {9 D$ {; Q& xPlayPlay, Let me know later who has the right answer and I will add points accordingly.
+ K& n4 O3 h" ?7 C7 n+ ?' e, n
" G8 G$ p! E6 xThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:! d( k: S* }4 x2 z8 U2 c: o+ j

6 Z! ?  E+ T( d& m  E8 p* j9 }- \6 s. @5 S; y& {: A" \
PlayPlay, Let me know later who has the right answer and I will add points accordingly.9 L# C+ K0 x% l8 A3 t/ Y7 X% G

0 h3 H) t: q" ]& b8 \Thanks

; s  q$ d( [# P. x$ v0 g4 g

7 K1 N- k3 P) G# `$ Y2 W3 Y  e) ~不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
- V: Q# A* p  v; }$ J% Y) i1-6 vs 7-12
" N' |9 ?5 k. J2 n- |7 y2 N5 Mif 1-6 = 7-12     13 is fake; K, {7 G  D1 T, Y
1 |, ]8 e8 S$ @7 [2 @0 q
if not $ p: }, k: A4 N3 @* _+ s% O

$ L2 L4 O! G9 z! y6 iWeight the 2 time . b" J; t' K5 s/ R) h

# l8 V8 l$ Y) B# A" r+ zSuppose 1-6> 7-12
3 X  s% h5 X5 j9 j0 m/ ^+ M' p; c- @, ]
1-3 vs 4-6 ' J% J9 x1 ?) ~/ w+ T
0 I( Q4 ^6 @" O( z
Then Weight the Third
5 B$ [% V% u* S  Y" P- w3.6 K& Z- o7 j. d' p, W! f3 T

" b' V( S6 y& M+ c4 M) ^  D; dSuppose 4-6 > 1-32 h" k) ?' s5 t! H+ }7 ?  y8 S# L
/ Z$ b/ p- @7 ]/ t$ h. x$ z( S9 e
Just like the first Step
' f8 L" V" u0 q# a4 t9 B! P0 _/ G
4 vs 5 8 ~2 U% V5 }- L6 S7 x4 W+ E* w

# _/ h; ?4 Z  S! x& H* ~! lif 4=5 6 is the fake one " i, e0 q' t, J; p) Q
% W) a* M4 U! ~7 j; _# W
if 4>5  4 is the fake one
: f% Q! c5 B# D. d1 ^+ R( M4 J/ s/ A  }" A2 X$ K9 r8 c- r) P
and so on......................

hello1997

分3組4隻波子秤
) R: X$ M& g0 r$ W# I  k$ H; d( T( W; b" t/ h
Group A: 1,2,3,44 @8 z& r9 N" `( g. v, v  L
Group B: 5,6,7,8# o; ^) K, j5 }! M
Group C: 9,10,11,12/ r5 ]9 h5 f7 r! x; g
Group D: 13
5 D7 w2 ?) g0 w5 b
2 \4 t3 g% H5 _0 r: URound 1
) J6 J6 z# m' OGroup A vs Group B
) f. |5 P4 [" |+ C3 E如A and B一樣, 即較輕一粒在Group C or D5 \) Z/ O' d0 T5 e) {
8 m! P( P6 f: @7 _
Round 2$ @" Q% U1 L9 P/ B  u
再在Group C拆成:8 D+ p) h1 s! K: d' O
Group Ca: 9,10. e7 j( o, D8 a0 e
Group Cb: 11,12' h4 M1 |7 H* h9 U
然後再秤, 如一樣, 即13為較輕一粒.
5 Y6 e: ^' F6 T( [$ K/ S7 u# H2 i7 f5 a0 L+ l
如不同, 即較輕一組有一粒較輕波子在其中,
: k, J" Z2 x; x- Z8 |: Z( q  m" ?( g要再秤, Round 3, 之後便知答案.
) X# w3 Y/ |- Q& W
8 ~* {8 w& O6 j$ v- t+ M' le.g. #1 假設10為較輕的一粒2 Q8 L/ w/ g- M0 H; H; x5 z( \8 `
Round 1
: G% P. U- |, C" _/ c" \1,2,3,4 vs 5,6,7,8 = equal5 f) m5 L( m& ^  i
  z  C, P1 _- m8 E/ h1 {( r1 i
Round 2$ {) g+ F' Y0 J. a* m9 ?; z
9,10 vs 11,12 = 9,10 < 11,123 T7 b: Q; L$ k( f

5 F& ]' ^9 R7 S  x2 J7 t$ jRound 31 l+ G2 s# g+ S0 O. k" q3 a
9 vs 10 = 9 > 10
- R2 W" {' o$ J9 H( b2 {; r7 M8 ^% L2 v4 w$ p: o  c! Y$ W; Q
The answer is 10.
$ z2 Z1 @: a- v* n* R; r; ], d7 P& }9 A3 T% h
e.g. #2 假設7為較輕的一粒
9 e; {# }1 L$ ^; W( P! F0 PRound 19 i. o1 t& U5 P' G* j8 ~- k
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,89 U) {# h) [. j' Q" M* k2 _

) [, N( [$ {  b* iRound 2# o' C* F0 \5 x1 f6 h* D0 J
5,6 vs 7,8 = 5,6 > 7,8
' k4 `% z4 H% A, e: J5 E% r* u
! ?1 P- ^7 x/ d4 LRound 3
2 p5 }& ~/ i. m# d4 v( ?% O: j7 vs 8 = 7 < 8* j" @% @% f) N+ Z6 t! d

- r6 q- n( s; w- J9 xThe answer is 7.6 D9 I9 w  `: k5 x6 q: Y

2 F  b( V# S/ _, [e.g. #3 假設13為較輕的一粒
$ L  \1 g( s" M9 w# C2 {Round 1
* t0 A  }5 p( c& r& D( x5 u( e1,2,3,4 vs 5,6,7,8 = equal
8 m1 e* C* `. @' z2 X9 [; y
3 A* D4 K5 z  e2 hRound 2- A9 p' ?: s8 L
9,10 vs 11,12 = equal
1 C, q; B, E# l; K0 D( ?" ]# x
+ L6 ?( x" s/ [6 H$ r5 p: sNo Round 3% g, u2 Y* X7 V7 S( e  D
+ t, o1 z1 y$ \9 }
The answer is 13.
( W5 x: G; Z9 ~: H( d6 U6 q8 \  Z2 D. p, S/ F
唔知我答得正唔正確呢?!
- s) F5 a7 p5 W8 ?2 [& C# @
% q( s: c/ h* a[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
3 p5 ?6 c5 Y, B& v8 o! C6 f# Q1.
! B: w) q+ a+ C+ ?3 e: M1-6 vs 7-12
7 B6 ]& Y* _4 A! U! G9 Mif 1-6 = 7-12     13 is fake
$ m( h% j4 B/ }. H; |6 C. x6 S0 x+ _, ?$ u. _) U- r
if not
1 {, O$ o0 H' A# V; _* ^5 B" X
/ b/ k2 I- }" U: @4 u9 }' b% ]Weight the 2 time
2 L  @! i5 D4 [3 \1 p# s' ]  j: h: R
Suppose 1-6> 7-12
! b. U5 W3 t. W# p+ X
- G' W$ T+ Z, v9 M  X+ k/ x$ c1-3 vs 4-6
2 F. ?9 K4 t/ a/ ~) W7 L' ~5 f( L/ d/ V/ Z
Then Weight the Third
  r, R3 P5 D4 m  |- x2 C, a8 Z3.4 Z" l% b$ e! S5 T- X

9 U. a* V" o6 w. b8 t2 wSuppose 4-6 > 1-3
- A# O5 N+ i+ t( o- M+ O% u- n8 l. g; s6 }, H+ B: {
Just like the first Step' U5 Q. z3 k6 K5 ~  z% X
5 \2 y6 T& S/ l- F" i
4 vs 5 4 I$ M& o7 D% M" C$ [$ Z3 P$ c
1 B# @1 P- P9 B& \, h
if 4=5 6 is the fake one
9 R0 Y( J$ t( h1 V3 d0 M4 l( n$ X0 f) k8 C* o$ b6 \2 L. F
if 4>5  4 is the fake one
4 l, R& t: p( H8 _and so on......................

3 B& R* i, }1 q& q1 R; ~5 F
, C: t% O0 o: f. L6 W7 C* N
* s3 {* ^9 g5 p2 l1 H! g
問題第二步: E4 o8 Y9 a+ A' m' S+ x) k
. x. l6 g: b6 t4 @0 j, x3 ]/ W6 }
Weight 1:  1-6> 7-12
, a5 p; p- K6 L* D% L0 y7 h/ H, q- \
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
3 S! \9 `5 i. v  \4 x% ~
% F; T6 j2 }' \$ Y+ Z3 p4 N你第三步点去搵 7-12 边一粒???5 V0 F% [* n( V: ~
; [! }  o, O# a8 t0 O. a
========================================8 ^4 B( I# G( A* D" F& R: [
8 R# E# J. f7 E; P
問題第三步
) ~: G. `, Y# R$ e' r' Z! U0 O/ c+ ^# k% q) x
Weight 1:  1-6> 7-12) q" Q# n+ T2 @/ f9 a' S, S
. _9 P* }- n2 Y; J
Weight 2:  4-6 > 1-3 6 Z2 d! d! O1 v' k
( t# M( |! }/ b) G
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