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2 }0 {( \3 ~. i
5 B8 ~8 n0 t7 l- q6 K6 ]0 O( u
『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)。
* _6 F/ c# ~8 w- }, d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？』( \/ z/ e; B8 \

! E& c3 ]0 d1 @1 W注意: ' x' d7 ~/ \9 g
- @: b/ h. o: e) u( F
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
# Q+ Z/ T4 s0 y  A# D+ @
9 {" _7 D# T! D8 y% V2. 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* q7 u$ b1 [- b$ p0 A

! C% }3 B0 Z; h6 v* B* z+ U[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
  C6 `+ {  o% w. A9 |  `% L相信e條題目都有吾少人玩...

5 Z: H8 `5 M" N4 j/ n& I1 q$ ~% e2 W我以前畫左個chart去答,( Y7 `7 t& r& q% \* o0 a% V
等我搵下仲在吾在
7 Q# a- H# E. o. u& x0 V5 V7 u3 ?" b# Q% y0 S' \9 v
當日用左37分鐘答１２粒波子，差７分鐘才合格。
6 x9 N" @9 d, C0 h- \3 ]13.........+ l$ d8 b0 K- r9 Z! U6 J' t
# g- w2 g6 P3 y, ^4 _" b
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
% H0 p8 h! j' I8 C3 {5 m( L
2 h' B7 F* O& n% i9 v我以前畫左個chart去答,- u8 R/ O1 u7 G$ L) h8 Q
等我搵下...

! Q5 r: K3 K9 U- }# O
2 t5 [# p# U) r3 J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:
. e& Q3 s( |* ?6 T  j& e唔識隱藏...已經諗到..

/ R9 M& }; G5 t0 l

% H. e8 w  @$ \5 y2 I5 G1 rsor !!!....e加改左
# [8 ^+ }$ u1 u4 E$ o3 m" H' R, Z" c& Y
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
6 h  B/ y& K; d: i4 K* T* a) Z" y" n5 i" _
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:0 X6 ~# L4 K- j) ?; t
相信e條題目都有吾少人玩...

' r& P$ W7 X' I
7 B7 C) S: f  ?6 y. ?
PlayPlay, Let me know later who has the right answer and I will add points accordingly.; C% e2 Q( ^' U  D) }
6 f2 Q% x5 O& ?& F2 w: ^6 {
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:, S4 e7 L. e6 W, S6 J3 T) p
7 @+ j. Y, q5 [* v9 e- t' X* D) d

6 S2 n, k* H1 C% PPlayPlay, Let me know later who has the right answer and I will add points accordingly.+ R$ |* c2 P1 B, y( v+ k
9 D& w0 u1 E: L) x
Thanks

$ i; I+ L$ W/ n9 x* _
' ], D. A2 k3 N1 s
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1." ^8 @7 D3 H- w! _' y" R% v
1-6 vs 7-12
  b, b: |7 O; E! I$ y" h4 }# c/ C+ tif 1-6 = 7-12     13 is fake3 I1 p6 M& J4 b, V- m/ H9 q
! M6 t* M. P8 |7 W; ]3 a0 @3 u
if not
% X' j. e- f3 G$ V; O
! i0 i+ |( v9 l& E* {4 ]8 ?Weight the 2 time 9 F/ C+ F$ _; W: x! z9 }
6 [, v7 N# C4 E( b7 }% w' B0 ]: D: P
Suppose 1-6> 7-12! Z" G' t- M& k/ S8 C

& i* z9 T: E2 O1-3 vs 4-6
, N2 v/ i! W0 D
$ r- y- e! k" f2 w- i8 JThen Weight the Third
2 l. N& s- c3 _: a  N0 ]7 X3.
5 T7 X7 q% F0 ~( |+ G7 L# ?7 Y1 |- e  J- e0 x# m3 w# Q
Suppose 4-6 > 1-3
- f9 w5 d' F( ~# p! \; E2 V% }: R2 u$ ?2 R" M! E/ N* b
Just like the first Step
+ n) w" w5 o6 ^" C; z, P9 q( M+ b  O3 @7 _" ?$ X
4 vs 5 $ N! _) O8 v; n, T
2 D  r) T- }4 [& Y) R+ N
if 4=5 6 is the fake one
+ E  y; A. R. C* g# [7 I, u) n9 S5 H6 E  \/ @0 Q
if 4>5  4 is the fake one
+ L% n8 Q, M1 c1 R. w; l& g4 j& n- @% Y# x; }
and so on......................

hello1997

分3組4隻波子秤
' ]" b, k/ {3 y" R1 C# z7 R( ?: ^
Group A: 1,2,3,4
7 p8 r, q7 d- \- `* uGroup B: 5,6,7,85 M. q5 ~  _4 j- a) T/ u. j
Group C: 9,10,11,12
) Q) @9 Q4 `9 F  P% w0 {- mGroup D: 13
6 u! J0 B: |( y! A" s3 ^9 K1 z+ p. N/ O' K: D! u# \
Round 1
5 o6 k5 }' w: H, p1 y) oGroup A vs Group B
" J0 v  d' x9 X( c* D! [! y如A and B一樣, 即較輕一粒在Group C or D( P( A& H& v  a) |
  V" R3 Y' f  P$ M: v4 |/ Y7 W  F
Round 2
: |) V& B' i2 s8 R( Q再在Group C拆成:$ Y4 i2 t* w# F* q7 C; ]
Group Ca: 9,10$ b8 v$ a. k+ F
Group Cb: 11,12+ {" Q% ^# \( W+ m1 p) P6 G! g
然後再秤, 如一樣, 即13為較輕一粒.- T# h+ D! e6 _- f' G- S

2 _* o* E* }0 m1 g9 q& b如不同, 即較輕一組有一粒較輕波子在其中, 3 Q# g6 g$ ]+ V7 F% N( f
要再秤, Round 3, 之後便知答案.
' X$ {0 K0 X# o& s+ E; |6 f3 b# N) m4 S; s
e.g. #1 假設10為較輕的一粒
7 L  E) W0 J1 X% x0 YRound 1
! _* d. }7 {+ ^. w/ W& ?1,2,3,4 vs 5,6,7,8 = equal
0 F# b- K6 V% f1 [
9 N: C, \2 j( s  k! GRound 2& P# L5 o% H# g1 u; Q7 Q
9,10 vs 11,12 = 9,10 < 11,12+ O( J. d! {% j; k( C
7 }( y3 h" D) t3 S+ V
Round 3' O& M5 Q+ p5 t& N* n3 [
9 vs 10 = 9 > 10, J- g1 k8 D/ t' }5 c

0 @# E2 y( P; P  J; b$ U2 YThe answer is 10.+ C2 q9 s+ `( B# \! G
$ s3 O- s* _( ^, z* ~% w$ ~6 D
e.g. #2 假設7為較輕的一粒+ ?! m5 A7 e8 P2 U, e
Round 1; c4 v+ \4 y9 p! ~5 t* j$ J
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: ^" S! D* V# [- v( N

* \* ?+ l7 T7 d3 E: pRound 2/ f0 T+ r. q( G# P9 j, y4 a. [
5,6 vs 7,8 = 5,6 > 7,8
$ g# p1 K+ t5 Y; M  j& {: `  M- y( i: x- O$ B+ c
Round 3
' b1 y; K- M7 H. S# }% x  x7 vs 8 = 7 < 8" L+ ]4 m! L, h, u. {2 A/ n' S
" ]/ t# ^. o& s( o
The answer is 7.
) e$ b/ n7 U' b7 S7 P, v( H' A& y, ]: U8 u- `" t
e.g. #3 假設13為較輕的一粒
7 i" {% n& I4 T4 _Round 1
$ {8 T* P0 |6 G6 b5 `1,2,3,4 vs 5,6,7,8 = equal% T1 v# {0 T# ?2 |0 g7 y) k& T
# P% z6 Q4 z  X, u, C5 |6 L
Round 2( [+ j: W4 f) Y5 ^- \9 ]* a
9,10 vs 11,12 = equal, r, m2 v0 E) U+ S8 I
- B! A' _9 C! s, }8 r- y9 I* F6 ]" _
No Round 3
$ s) c9 n1 Q, t# M3 ]4 K$ E" q$ x/ j7 y# ?. @
The answer is 13.
  s: Z0 N; A7 F1 N1 A# w2 ?1 o% p5 H" |5 w% a3 y: A' b! `
唔知我答得正唔正確呢?!
4 G9 T7 H$ Z3 V) ]. f, F. [! `& S( ?) K5 L* 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:5 F3 A5 V) U1 f8 }* L
1.
* c% ?/ y, O4 m& `3 O+ f1-6 vs 7-12
8 x6 W/ t/ u. J# t* i6 ~" N% Dif 1-6 = 7-12     13 is fake
. q  }% r% e8 c3 _7 j2 d
% v5 K3 G; w% I2 U0 t' j% Z( oif not / p- J1 X+ z8 S+ L/ N& Z
3 I6 `' ~4 R7 c% h* t
Weight the 2 time 4 Y; V' q: w; n3 o: o5 M

3 c4 i8 t: N3 L; M+ \& @! l" P3 B, XSuppose 1-6> 7-127 I/ q/ K7 a! ^
- m' C1 l! U1 Z; {" V
1-3 vs 4-6
3 D8 D4 Q0 F0 F& U
% p5 i5 n; [8 v$ Q" H4 R; @  NThen Weight the Third
; F, O/ r( o, Q+ i! r2 M- H9 k- G3.
+ O8 w/ b! G$ c
3 \) X9 c. `  {& T2 b, p/ _Suppose 4-6 > 1-3
" h) E5 n/ V/ y' w8 u6 U6 ?1 ]) K$ W8 ?$ j/ X9 i
Just like the first Step
2 \4 ^. L2 x; G  L# P* `# x5 z% T( I1 g2 _; ^' Y
4 vs 5 0 D: }+ n9 I! G/ V) T3 I, b7 f
6 f; W. `( P/ R: _/ @. U
if 4=5 6 is the fake one
# j9 N6 r. w; n$ |9 E- E! k* @4 V* Q1 J; k7 U
if 4>5  4 is the fake one
2 O; S9 N; i8 b% V2 Mand so on......................

  z; a+ k, e% S7 }+ q. \' W

0 i6 Q# F- O6 w* B& v/ S, c' A9 t+ w
問題第二步% w; {! E$ p8 v  ~6 A

  H/ M1 ], @* z+ w* m: sWeight 1:  1-6> 7-12
" d+ s* p3 t# a# M( `
/ s! I& ?3 S6 E/ xWeight 2:  1-3 vs 4-6 , if 1-3 = 4-68 m# p3 ?  b* c& X
; }; Z. O2 v) s( |
你第三步点去搵 7-12 边一粒???" S7 d. G/ x9 ^: A) b( l
% P. f7 A9 j$ k& b. F
========================================
( v: E( s0 u  o
2 X5 l, C, X2 i: e% U5 p問題第三步
1 L/ i- @0 z7 y6 N4 A6 d8 h9 \. F. O
2 x" V' `+ g$ K- DWeight 1:  1-6> 7-12$ Y. X' X/ W% Z& v: V
; P3 q( R2 P! ~, T* L) @- B5 o
Weight 2:  4-6 > 1-3 - s; W; _6 A8 @: e; [  s4 ]

  Z, `* W5 X. X, t% c1 L; ?+ n+ Z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