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
+ k# y' M$ a# V" x" P  c- c
1 L( G) ~5 x1 T$ {4 {『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)。
- T# p; J+ U: @2 ~/ k1 ?/ M2 ]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 Y) @/ w) z6 \  b

; l8 B# l8 N, {1 z注意: 4 b" M4 R- G4 J) @
& j! I% U) y% @. f5 Q
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# O/ M! S7 e1 v/ J7 J' |
% ~3 X- g! y, Z( i0 a: k& Q
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* _  U* ~  o8 Y; i
  o7 [$ c: K4 Q3 C( W0 J
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:! z3 T  Z  l3 ]5 X5 _
相信e條題目都有吾少人玩...

; }/ d( R7 K% ?$ ?8 [2 {9 K( N我以前畫左個chart去答,
# m! R% G% ^$ {+ p' b: }0 P) d; s& n等我搵下仲在吾在" s0 Z5 P. x! s# F

1 f0 J9 B- K" @& t當日用左37分鐘答１２粒波子，差７分鐘才合格。
/ e8 Y1 X+ C" l! ~+ ?7 t( X# Y13.........
3 o0 b( k1 ~  r: i0 P" g. X" T) ]' O& B6 z5 ^" N
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
! ?- ^# q$ U" h, t* D* O$ m4 M& O  r" r/ I  p
我以前畫左個chart去答,+ r/ {: ~; G* Y
等我搵下...

( P4 |7 ~' a% {

5 q3 L! r* q( e9 T# ~% |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:) |7 `3 l3 d- q2 A# x9 O, v
唔識隱藏...已經諗到..

6 C+ L5 u1 d  @2 f: @0 @$ G% r- B( d7 |
2 g9 d+ T9 A/ g( _# ^: Usor !!!....e加改左
5 l/ b* _( f, w! M
2 U, h# _2 A/ o& s  H# m4 d2. 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% I6 b. [6 D6 e) i: t2 }: e3 |
% L8 t* o) x& v
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
5 b  O. d6 q* v: w1 f5 u) {% G相信e條題目都有吾少人玩...

, `2 H) D# Y) L- A2 \) t+ x. o: {4 A7 F/ N8 Y
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
* w5 I' T. {3 n" q( J/ `( g/ I% H9 [' h- A- x; s, Z: r- g) l
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:7 ]! d4 x* |- H: K2 ]
5 V! G# ~$ V$ A7 W
/ F* _- b  Q" ]1 U
PlayPlay, Let me know later who has the right answer and I will add points accordingly.# X% h* H8 a! Y+ x5 X. P+ F; g
) v: w' i0 @/ w9 J$ m  Y6 d
Thanks

3 y, g9 j1 g, m) L; R2 _
' E2 Z8 k) _: c. g不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.! @: ?/ o# u' [0 U5 q' k
1-6 vs 7-12
; H& v7 {& U( [$ Mif 1-6 = 7-12     13 is fake
# |3 j' K) L5 T2 y; `" B4 l) T
if not 4 w5 k$ d/ S+ n# G3 Y
% V+ I( K& v$ P2 w
Weight the 2 time
% v5 J7 E" b$ Y$ I1 R8 J* Y, E ; p) W, ~9 t4 h) _3 H! G' q
Suppose 1-6> 7-12% i/ G( j2 \& w

  O" W  W+ R; X5 k4 E1-3 vs 4-6
0 F1 Y: ~; E4 W
8 Y5 z5 Q, U! q" r8 ?Then Weight the Third
- V+ Z: H/ g, U- A/ ^- I3.# s# C  Y$ |" a, L+ s0 d% g' }
: {  T2 H! F7 m
Suppose 4-6 > 1-3/ _+ S, |' a5 K' R

8 X8 |+ R; |5 g, SJust like the first Step
5 S0 L$ t' `' h+ V3 }$ a1 A; C( ]0 {8 N' H. }* ~' D4 N5 g% t
4 vs 5 % b, J3 y  q9 A/ A! F$ |$ }2 d: _
+ C0 U& `7 e) \  P
if 4=5 6 is the fake one
4 v# _9 b0 v7 Z
7 X" U& X% ~! [0 v& x+ Sif 4>5  4 is the fake one
1 R7 S* a5 u( e7 O: L+ y# I& Z3 d: X, O( \% W  M: `7 P! g
and so on......................

hello1997

分3組4隻波子秤: i& c+ E( {& O2 K
' Q5 @  @' C- G3 M: X2 C
Group A: 1,2,3,4: v; A/ s- z- H  J, s5 S
Group B: 5,6,7,8
" o; N" o% [* T% k8 p& k) GGroup C: 9,10,11,12
7 t. ]5 L. C( D- F" }% [" gGroup D: 131 i) O+ _4 u1 w, D  ?& V2 X

" D5 T/ o, x9 |- V8 J/ ARound 1
+ c3 H5 m0 F  w2 {3 O% FGroup A vs Group B4 Q% M) P2 E0 p: W2 C  Q
如A and B一樣, 即較輕一粒在Group C or D
4 I9 J- k& n0 s2 m6 s
! \, x1 v) ~  ORound 2, w7 q+ v1 k4 x- O  Z5 U
再在Group C拆成:( z3 o8 D0 k+ i# d- D
Group Ca: 9,10
4 i  P( K# U' _7 }0 a+ bGroup Cb: 11,12
: _- T. E  K' z/ H* q4 c然後再秤, 如一樣, 即13為較輕一粒.8 {" k+ v: \+ [; H

2 A. k7 z: u2 a0 J$ E5 r" L7 F如不同, 即較輕一組有一粒較輕波子在其中,
0 K7 n* n7 F; R9 Y* {要再秤, Round 3, 之後便知答案.* u9 ~7 K4 s0 }' }" e

) v0 Z& x: ?) Z/ \1 |& T8 \, ]e.g. #1 假設10為較輕的一粒
9 s7 A9 O! T7 o7 l3 i' b: lRound 1
( y- a# @' C) p5 `  z1,2,3,4 vs 5,6,7,8 = equal
! u; @& {" h+ _! P+ g
6 S& |- k+ V; T! [Round 2
6 P9 U, ], E# a9,10 vs 11,12 = 9,10 < 11,12
. S4 Q7 l+ n2 W4 O  h5 P' B: k) M! @) F! Z1 o; j3 m. l
Round 3/ w+ V1 K: d# x8 ~; |
9 vs 10 = 9 > 10/ a: T0 R: h$ R( x" u8 J! }
; T: M: p2 ^. X" N* _9 A& F) X
The answer is 10.
# k) N2 B& F. |% X2 m* e. R$ x, Q  a5 _' t1 l/ P% C, }) {, b5 C8 c
e.g. #2 假設7為較輕的一粒- u2 q4 o/ {: b
Round 13 u7 Q. X! r9 V" \2 J) I& B2 i
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
" H7 F2 x" C5 N5 l+ \
# B* Q6 B! c; |& N9 X. D/ zRound 2
$ O+ N4 b$ ?% P9 R5,6 vs 7,8 = 5,6 > 7,8
! Q9 c! A4 s9 s0 i' Q" H/ e. T; }5 U7 x. J" i( k3 v
Round 3& q  C' w2 h2 g) c% p* P( U  O
7 vs 8 = 7 < 8
: c0 M' O: ?3 n, Z. S, L( ~; J
5 B. G' Z3 X) \% j0 B0 K. MThe answer is 7.) v( o4 ?2 i3 o+ _6 E

" E1 e' K7 ~% \- _/ B) K+ Ee.g. #3 假設13為較輕的一粒5 i3 y; Z0 j. y8 X6 o8 ?
Round 1& `5 g! N& z: J6 Z
1,2,3,4 vs 5,6,7,8 = equal3 M) E  p) j: M- i

+ G) {# e5 `' m! oRound 2
" ~; c" f$ M6 V* ~4 X; B4 K9,10 vs 11,12 = equal
* S/ b$ C3 s  {! C
3 c# p: D9 b4 W8 y+ m2 B6 g4 ]0 hNo Round 3$ r6 D& J2 Y$ K3 W1 l

9 h  Y2 o& v- M$ i9 B; pThe answer is 13.7 i# Z5 W* b, ]# b) b+ J
, _$ M" s! f5 L5 N5 j* X
唔知我答得正唔正確呢?! : O9 {/ r4 E! Z& H9 t5 X( i
5 M7 T2 W. L- R* U
[ 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 }, d& e# n% c1.8 s! B2 ~0 I5 @0 e+ w
1-6 vs 7-12
2 S( i( Y7 m8 W1 Oif 1-6 = 7-12     13 is fake
$ {: o  A8 s+ w" a* W1 e& F2 C  [3 w" p& r  [$ O3 u* f9 O+ K4 M
if not
7 P6 p/ G8 y& h2 c
( r0 o$ m3 o8 {. _Weight the 2 time
) ?; X) `: k- v) @
' e+ r$ H# Q1 t7 ?( K) vSuppose 1-6> 7-12
+ O* B0 Z& P" e$ x5 z) l- V
0 {% t# u  i, d! n2 ]( r1-3 vs 4-6
+ N0 P: P9 P- C7 q) x1 }9 l  F1 J( x" x" j: H* G
Then Weight the Third1 ]$ ~/ `3 J" d* M  B
3.
6 N4 D: B1 p4 Z- J& u  F( G
, U, j; _! h  ?+ U3 QSuppose 4-6 > 1-3
  C/ c7 j/ y% m$ C# z% z
( y% u0 k; Y) d5 G% f/ R3 rJust like the first Step
5 q7 g' W" d' u& x
5 Q  T& {, K; |7 V4 vs 5
6 v& T: Y; u" V! I' B6 @2 t
& d! j6 t7 A& g" n8 Xif 4=5 6 is the fake one
) l2 f& u3 ~( ~# V+ U
( c) [: m" [) R- @if 4>5  4 is the fake one
6 m4 ]2 u- k0 |' v/ Uand so on......................

/ r7 Q& D; Z! Q9 q  T& I  g
; _7 Z; e! n2 v1 T; q; W" j7 y: ]/ L: K
3 p2 W+ k6 p1 a" }, C. c問題第二步
$ k' O% J, _% p' L9 D7 g* w
" i! E* @. l7 T: I/ EWeight 1:  1-6> 7-12
7 E! K' H: x, @3 Q9 l  _; t, Y7 D/ V- y+ D' N
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6# G3 \& Y& d* J: W; W) a
4 @- k" N7 ~( z: y& L) m' g
你第三步点去搵 7-12 边一粒???
! P' Z% U! S/ s% V" f% C" N- R. f. N3 L" z, r
========================================+ n% x% o, [  }6 J; u' ]

/ W7 k  @8 k7 |" u. J問題第三步
0 e: `# a- W! B5 N8 B$ o+ R# l1 B$ A9 k( j6 ]
Weight 1:  1-6> 7-12
) a# a" c: d. w0 |+ M1 C
, j& j& w+ S# y3 v+ TWeight 2:  4-6 > 1-3
1 V% u2 J' |% @6 z9 u
; d% U; y' x+ g: ^3 P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