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 K9 l: \) `7 }* U1 ?6 M4 c5 q* C9 U  X. n$ G
『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)。8 V9 \$ d7 G& Z6 p
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？』$ l5 L, A: W& A6 O' v9 K. I* }
7 h) D# f# s: f' v( k
注意:
- t! o3 S) U( Q
+ S1 @) I* |6 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
- _5 g& W: v0 C' e5 h# T# K3 t" ]1 Z
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$ P# g: o& s5 Q# n. W7 a

0 W0 K: U8 n, O# e+ T: j* Q[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
1 {( z$ r# `' R相信e條題目都有吾少人玩...

1 i' Y( H* A% D9 D2 X  G我以前畫左個chart去答,
/ Z4 @- x" D, F, H等我搵下仲在吾在4 q- I! O5 a6 r

2 }% A, e/ [$ Y1 I1 }5 E當日用左37分鐘答１２粒波子，差７分鐘才合格。
) D& e1 j: l# H, T2 G* W6 W) }13.........) e. P1 s4 K, Y: V0 d4 i
" |, Y& e' \- ]2 O# Y! r5 J
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:) p- S& W' t# d- \; v

$ G+ l; P* _2 X7 s, F3 y+ R6 {我以前畫左個chart去答,' {- o, f* f5 T# c% M) [& L- M) k
等我搵下...

9 P+ u* g. L" s( b5 i0 F. I* h& D# i% f
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:& m" S5 ~/ L* _  E6 P- G& O
唔識隱藏...已經諗到..

* k4 w% `% N! f& h& J% I5 \0 {

. N* j, g/ T, C/ e' p& Usor !!!....e加改左
! N' u6 j9 J; r+ M% a" p6 V  k( o: T7 c8 l0 }! P; w  L5 p5 E
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/ z  G7 C! ?! d

- k1 ~3 {" u$ \7 p  Y[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:  V/ g+ a3 z5 N% R8 i
相信e條題目都有吾少人玩...

1 N+ c) ^! s& ?: Y8 h" b6 o! f- s3 G" V2 i
PlayPlay, Let me know later who has the right answer and I will add points accordingly.2 i' }( h5 L( m8 G! W0 H0 C

1 N- `* X2 F6 q( e+ V6 ?* f8 }. L/ ^Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: Y1 B7 @0 U5 \4 G+ C
% H  _5 C1 F7 n2 n+ O
3 d. r; ^1 o2 v8 ~" i) V9 u. T
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
( M+ s* |$ [/ k/ J) G1 Y* @' B- T8 d3 @" v8 n. K/ q
Thanks

$ u1 ?- x5 [3 J) s/ R- l6 [0 K( F* [3 @% l
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.0 }5 H, f1 W, ?2 e4 q" }  r. b, T
1-6 vs 7-12* u" u! s8 K7 r* a
if 1-6 = 7-12     13 is fake" F, q% ~2 d$ I, d3 U
% g! v2 P$ t$ l8 E
if not 2 Z. I; y% x& R, t9 d
+ j! g% V& ~& Q, G+ u5 O
Weight the 2 time
/ j' r& e: `* v. a
  A9 l- m  W% A3 r3 e0 K$ R) ?Suppose 1-6> 7-12/ h9 E' s9 i: P* D. E: T
9 [! R" {* p' O  q$ A$ t
1-3 vs 4-6 5 u4 o; ]- k2 |) g& o

9 c) e: ?( r( @9 i# f/ U7 CThen Weight the Third
7 P  M* q$ Y) l% e3.4 c# ~, ]& H) @- ]7 d! B; q) l( K
" }8 U  I1 b& e' C, R
Suppose 4-6 > 1-3
. W- Z' R4 g% \/ u/ ^/ _4 g+ M6 D" x! ^8 I
Just like the first Step
' s1 B6 s8 Z2 R2 h: M+ Z* x7 C& N3 L5 Y& {; M- R. ^8 R. l
4 vs 5 4 t0 w+ P7 P8 w, h* z! Y+ t2 ?

5 H8 y& t' v  D/ k% o0 \# {' @' rif 4=5 6 is the fake one
. V* p) z9 X* H" c# U2 G
  q# l) l- g7 O. f0 mif 4>5  4 is the fake one 1 g; U0 l) G$ w" N; c

' Z( z8 P& P* |/ ^and so on......................

hello1997

分3組4隻波子秤
; a1 b8 n2 g* r; V
6 d' R" G$ a6 S" r+ Z/ Q6 ~Group A: 1,2,3,4
5 R, A! Q8 z: ?" w8 DGroup B: 5,6,7,83 U( G' \; z/ M
Group C: 9,10,11,12
9 \. g9 O, }5 i* QGroup D: 139 D/ J: N4 |. \

8 B; k: j/ N+ n9 R1 I! |; jRound 1
- Z9 b- q& w! n% sGroup A vs Group B$ G6 s7 W$ s( |" m2 q
如A and B一樣, 即較輕一粒在Group C or D
2 v# G2 ]- R7 h2 k# {) [
6 F+ D: B3 \0 ], l3 S7 R# WRound 2" V4 X+ s" v- a5 ^
再在Group C拆成:, s" l# {7 v# B. R
Group Ca: 9,10
8 s2 T6 K. R) G' [Group Cb: 11,12
$ L9 W1 e; d; L2 E7 s( o. E然後再秤, 如一樣, 即13為較輕一粒.
" x. v" Y6 D" y- p" }. k& v0 @9 L# y7 N& F; n# u
如不同, 即較輕一組有一粒較輕波子在其中,
! y( W5 U1 S) M- R0 o# r# `/ ]/ g要再秤, Round 3, 之後便知答案.( M' \9 B8 H8 }! k+ S( z* w
/ w& `  [$ f" Z% O6 N& o! ?1 b0 j
e.g. #1 假設10為較輕的一粒1 l9 x( o( L. h; e' L
Round 1. X# ], }. y8 f8 b
1,2,3,4 vs 5,6,7,8 = equal
: }: F  I5 ]$ `! [& N( }1 A% k8 \) o# t1 e: v/ }0 K
Round 2
: H, K# N, |9 y9,10 vs 11,12 = 9,10 < 11,12
1 ]9 ?4 Q( j/ _( x
' s3 }% X2 @0 s) K! t$ o; ^; fRound 3
6 i2 i; C& o" N7 k4 p; _/ ]) ?9 vs 10 = 9 > 107 a) E3 _; }) f3 _* z6 J1 H

2 @3 [! e, n% p+ ^The answer is 10.
+ D) @. s0 G* i8 Y; w. Y3 L9 u1 J& J8 Z, r7 \
e.g. #2 假設7為較輕的一粒$ F# G, L2 W" S' x2 {; W( f
Round 18 @0 W$ w4 A2 G" C; Q4 [, l
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
+ D: _7 q3 ]3 @* X
( a! E- }, M' nRound 24 Q$ R+ L8 u- j6 |
5,6 vs 7,8 = 5,6 > 7,8
2 q' ]) f, I8 H9 W
5 S  _4 J& s: Y% M3 K( K8 t, ZRound 3% H4 j0 D: _5 q; F. |1 ^! E4 p
7 vs 8 = 7 < 8
* P0 C  w  ^$ T3 r' L- h1 r: ], O' h/ K* y
The answer is 7., w. {; i/ U: v
& a$ M' _! n) V6 L
e.g. #3 假設13為較輕的一粒6 q  h' p& I& D+ y3 z. w
Round 1
, r  n1 n# O1 t. y$ S) U) g1,2,3,4 vs 5,6,7,8 = equal4 e; e) s. Y; U

, ?7 w# B9 A9 Y* k* b+ _Round 2
5 G9 G: F! H' S  L9,10 vs 11,12 = equal0 b6 t! r, [: Y. y. {0 e

+ g9 z8 N3 Y, I0 J0 B* P9 I( sNo Round 33 o# V. W* g3 n0 |  d$ \; ~

3 v4 h5 u/ E+ g3 ^5 H+ @. JThe answer is 13.
" V+ Y- I1 C8 Y+ ]6 w% r: k- E' P& |8 a. }/ }, A3 f/ q6 u- K
唔知我答得正唔正確呢?!
0 [% X8 E3 q1 g7 S0 ]! K7 R$ w7 t7 o8 n, S, [* P" o( m, _# F
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
9 J9 ^; ~8 ?. \1 {1.6 A7 l7 z7 y7 Z3 z* n; I2 x* ^
1-6 vs 7-12, Z, a5 F! S2 ~0 h3 B% Q5 d
if 1-6 = 7-12     13 is fake! ]- S; J. H! Z3 E8 L; [

! k$ o  [5 Y) l' B) B6 L) kif not % Z" ?5 c- e- y9 i) ~' k" [1 R3 [

5 M" m0 [9 @9 `4 L) fWeight the 2 time
, D+ z2 @+ r. }9 P
7 \7 a, p9 I: W0 Z" VSuppose 1-6> 7-125 A( i( }- q- G( o. s7 t

8 m+ `" H* h  W4 q4 O( G7 K7 ?1-3 vs 4-6 5 b* J& ?7 |+ U& X& u% Q! w1 \7 d
4 n( G/ k6 ?  `( N
Then Weight the Third& H" n  C7 Y+ s0 I/ a4 D
3.
6 n, c: b1 X3 O
: L$ X! z: w/ g4 V# V% y- J+ }& gSuppose 4-6 > 1-3/ K- ^& T1 M! x8 A! [# T
( D7 }$ Z! c1 G, P2 k0 u2 D
Just like the first Step
) C: j% h& b& M
/ k1 A5 F/ q/ ]4 W" O4 vs 5
+ `/ M5 e8 b: L/ _+ v% C: w" p2 Y+ \, Q7 d$ z/ C+ d- ?8 G
if 4=5 6 is the fake one
" x0 h! r7 ]% R# ~! n9 g5 c3 U) T9 ]# w9 d6 s2 L
if 4>5  4 is the fake one
1 P* s/ K( j6 C4 hand so on......................

3 q9 N5 B% Z8 C9 I, ], u6 i4 y
' _( ^; |& T0 m6 U
1 p6 x) I( ~/ E0 y) W
問題第二步
- o/ Z# X3 {) _$ K  B- k$ J
6 d: ]2 g. `: D9 W& w0 {3 a9 gWeight 1:  1-6> 7-12
5 x/ C7 {/ ^1 j5 g- x0 N% f) Y0 I9 @% m0 \
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
; n" c$ ^, Z6 @) \) b; {: }, X' ~; l2 R) `( F1 q" L& V8 J- e
你第三步点去搵 7-12 边一粒???8 y$ b! i4 Z5 I/ T4 T

3 {1 O' y0 h5 o2 {" e$ Y% n========================================% G1 b1 g) \* g$ I! `* p* a, f
: b( y# B0 l7 D0 q3 a, }
問題第三步" o: w! q6 c5 c3 w( k! M
0 L: Z- B8 G6 z  g! h
Weight 1:  1-6> 7-12
) s/ ^  m- e  `# L9 [" R4 D$ U# ]! k
Weight 2:  4-6 > 1-3
  I0 ]' p; G' q: S( V& M) Q( b8 I  y
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