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
! |1 v) R8 ~7 m9 @6 E8 R. o
( |8 c. L) @' o2 l( R# x『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)。
- G- I# J" o& N3 p6 o0 @* O5 q2 r, ^# f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？』
9 i4 J3 q7 @8 g6 |0 v0 @4 N8 q- ?1 i+ }( U
注意:
, o, E% x* o' D$ |) V% Z6 p! q7 N
- |0 d/ s! m( s9 r1. 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
  E- f/ [! \6 A" A% C) D$ y* G& D# y) E, 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  , hide 字要連埋 , 內容 = 答案
8 |+ I6 i9 Y& J, [3 Y
# ~( Z* t% H$ R% @; j[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
6 k' S8 O0 j7 R% a9 B/ U相信e條題目都有吾少人玩...

+ n  q2 a* ^* N& u1 K* q
我以前畫左個chart去答,
; ?7 \1 P9 x6 z等我搵下仲在吾在
6 f9 X7 }% t8 r) U7 F: A2 n
  M- l3 S2 c3 l; k6 ^' f- n當日用左37分鐘答１２粒波子，差７分鐘才合格。
- f/ C. f+ V8 n3 E; Y13.......... Z! e" G9 t6 _7 u+ W

$ d' L; e  h1 }[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
" Z0 D/ i3 B5 W5 i0 c* Y8 j
) ?) M& H( c& x# s) D我以前畫左個chart去答,
+ |4 u( M8 V* ~+ V) l( h% p& y% Z等我搵下...

! d/ j" @' I9 ~2 ?
3 i) Q. v' o/ s, [
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:1 |5 J  c1 T  r7 S
唔識隱藏...已經諗到..

  r2 G$ f0 m$ v. f4 V5 ]/ C' O8 O  O; [6 a
sor !!!....e加改左
3 m9 f! H0 k" n8 }& W: b
" ~0 ~! Q% b; O8 o0 v' }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
2 x# G2 s7 y- f; d! c
* K6 n" x% s+ A/ V: N, E" X- g[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:& Z  U+ e  p& n8 V4 a: J& _$ o
相信e條題目都有吾少人玩...

* J2 b. C! z. a9 T4 q  c: C4 D. H, {2 u
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
+ G, J3 B6 B% \2 d% e. w1 o
5 }8 w2 L, a+ EThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; x% }/ c2 v3 R7 p
1 d; X- O. H7 j! A8 E7 z7 [

& C+ u" a, t/ L' Z, W- a5 Z) CPlayPlay, Let me know later who has the right answer and I will add points accordingly.
7 i3 \& M1 W! A1 p" [  {" K4 K7 J0 n3 T4 T  }1 P
Thanks

2 n0 }2 s6 c$ X3 L2 P

6 p' A9 u7 c- S& Z: }不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
" D6 k; X+ S& S& [8 T7 a$ H1-6 vs 7-12
3 |& G3 B& i* j4 vif 1-6 = 7-12     13 is fake1 M; f3 ^# L& i* ~6 |1 i1 r; O
1 S# U* P0 |8 q7 O' T
if not 8 i! X* H; S) z
2 d# ^7 H+ I# S
Weight the 2 time 0 q; ~, {4 ~5 \% R$ N% j( @

* `# D& x( ^: K  @: `; @Suppose 1-6> 7-12. c" K  r% y, n& t7 |4 T: Y
+ i0 R, s. Y8 C9 J/ u' n
1-3 vs 4-6 : `/ U3 H5 g% s0 b

6 S2 B- P/ N$ _$ c; t6 H. E& D2 y, wThen Weight the Third% G; {! `+ B: N* n' k4 Y2 ~6 E
3.1 l5 C- P1 O1 V- E; M
  J+ ~' B( @! }
Suppose 4-6 > 1-3
  s) f0 U  O3 U/ l# a2 Z8 S4 @! Z" u/ y/ `! T; d. \+ n
Just like the first Step$ Q9 a0 k8 K5 Z' v
) F5 }2 T. q0 ~. z) b
4 vs 5 0 H5 K, U6 A4 y

  ~0 r3 Q+ t) wif 4=5 6 is the fake one
% ~( D3 ?# `7 ?/ T, G1 k' e, l' w9 Y' o4 u
if 4>5  4 is the fake one 0 h4 q2 ?; ]" C" j  i- q- C

. c) e3 P2 i( Z* u2 G) f3 Qand so on......................

hello1997

分3組4隻波子秤: m$ J! j/ u* ^8 A& a

" A' E4 ]) e9 {4 eGroup A: 1,2,3,4
+ i- U! Z$ I* C1 i/ r$ `Group B: 5,6,7,8/ ^8 J! w- Z1 R3 D/ ~; E: P1 z( l8 V
Group C: 9,10,11,12; X( o( ?3 L. @
Group D: 135 m/ ]# W1 m" W
. K7 Z& F) F4 R# r/ W
Round 1
0 f  E2 e6 o' rGroup A vs Group B
" |- @3 S) D# C( o  s* M如A and B一樣, 即較輕一粒在Group C or D- A) W5 L0 ^( y: \& @' _4 J0 O, Y
- X9 d1 }* y- s) V5 @6 |3 g. F0 `
Round 28 `: R- H& }5 L. A3 a5 F- S: K
再在Group C拆成:# j5 i5 o, ^: k
Group Ca: 9,10
) A6 F; \' \+ y4 SGroup Cb: 11,12& _0 Z6 S$ q) p7 T3 `5 n
然後再秤, 如一樣, 即13為較輕一粒., M+ B8 i# C# x# i8 p  E
$ P. o3 C- `6 }, f, j1 ?
如不同, 即較輕一組有一粒較輕波子在其中,
4 `. m' G: J( d, E要再秤, Round 3, 之後便知答案.8 p9 ]( T( x* b
& e2 F4 O* ], G  n+ S. |/ @
e.g. #1 假設10為較輕的一粒
& u% k/ K4 Z3 `# nRound 1
0 h. h( z5 d7 m/ o% n0 ~, P; F3 K1 H1,2,3,4 vs 5,6,7,8 = equal
: I4 m! w+ n$ F
5 C; W" p; I6 _# gRound 28 N, D; p  V5 X- @( q3 j
9,10 vs 11,12 = 9,10 < 11,12
7 ]; [3 _6 J" X5 d; v7 R; B( G/ e6 l
Round 3
3 k; p& G6 l* d9 vs 10 = 9 > 10; z6 W$ Q* N& e2 K8 Q" o

2 O2 H0 a! K6 b! Q# M! TThe answer is 10.
) V# O# l/ d- |' K* S9 K3 f
: {# g" n5 \- z2 }% I) }; H( Me.g. #2 假設7為較輕的一粒
% j- o9 L/ W8 }, Z7 w2 hRound 13 B: i0 h5 S, }+ E& |2 \; g! s
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 H6 W# i! R4 k! T! L
; ^+ L: P) _3 Q; b! b! K2 T
Round 2* H$ u6 M/ y" X6 M8 d. Y- K
5,6 vs 7,8 = 5,6 > 7,8/ x1 J# o- Y- k

5 V9 P( U1 s) z2 E9 z' V( eRound 3) j) U: g" o' f+ D$ h
7 vs 8 = 7 < 8
+ s/ B; A0 _' z
3 a. o  W& F+ X( x' D, Z" }' X" FThe answer is 7.
( r& Z  z1 U6 k; |- O& H
" Y) N! i1 s0 v+ s) ie.g. #3 假設13為較輕的一粒
( S0 k. f! T6 d+ t: _( TRound 11 L  Y! b! J; R" I% M
1,2,3,4 vs 5,6,7,8 = equal. s6 {4 F: a) T0 r! n9 e

+ P- d2 J$ A2 p/ Z1 q( JRound 2
4 U+ e' L2 ?, }3 e( `* q- K, h6 j9,10 vs 11,12 = equal
( A1 u. Y& z5 @- H% d1 [/ M9 G9 X6 H- f" V8 C
No Round 30 g0 P+ m6 |. k8 x9 i7 \" p
& p/ Q; f' M* _( Q) l
The answer is 13.0 c8 D5 D* ?: v1 ~
) R6 v: k5 R: S( z
唔知我答得正唔正確呢?!
! H+ R) _7 ]- e' Y  F  [' x: Z. C; H6 K
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:0 j. X9 ?1 m8 _; u, ]
1.
0 s4 e+ m) t# j* s! R4 x" p2 I1-6 vs 7-12
) j9 H. V5 N/ T- eif 1-6 = 7-12     13 is fake
2 I" ]4 E& ]" V6 O4 B- @* o3 Q  O- K% ^! u* F* U  v
if not 1 q7 S0 ^- r+ {
! b* m+ A; l5 `
Weight the 2 time 6 ~- O$ h2 `  ?' A3 P

$ j/ G, \/ g% G" h6 dSuppose 1-6> 7-12# c5 @6 q. J, C$ m& m

4 d7 G* d4 v6 G1 x& o. o1-3 vs 4-6
5 W6 b9 W# N, {5 s4 q) n! H4 d8 D0 g. [; e# e) R4 P3 i+ f+ E: z
Then Weight the Third2 ]8 P# p, t" n- y+ _
3.
" R0 M3 j7 o5 g  X
$ k+ \& C" e$ D) W" e# Y+ {( cSuppose 4-6 > 1-39 r5 J5 A7 F  n+ `" u8 q# W

2 F) |% \) e# d; c( i; GJust like the first Step' r- g# k4 k4 N( e: E
) b' H1 Z* |/ d0 v2 K! U! i* K) J
4 vs 5
* X; K8 H5 h: J" z) v% y0 E- x+ A* \2 W
if 4=5 6 is the fake one * v5 {6 {( J6 ~8 t( k

% Z) \# C8 o1 d1 {6 q+ Pif 4>5  4 is the fake one
% Z5 i0 m) r* X# M# ^7 jand so on......................

( \/ T3 K0 O2 Q/ U

" G6 n, |# P5 \2 V! S8 S0 J) ~$ L
6 r& G7 U2 ~) }6 @問題第二步
! A3 U+ G; v+ l  `* C
) d9 h4 @5 \0 i2 p* IWeight 1:  1-6> 7-12! b8 w/ V+ V) a3 g+ e

! E, a# f0 T. B: M$ c/ l  JWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6) o9 i  l9 G% J7 Q0 j) D1 u
/ a, U4 e/ p! o. P, \' S  O
你第三步点去搵 7-12 边一粒???' `/ d% W4 |( Q

7 V; S) _& M0 j$ e% J$ d# ]1 l========================================
  a0 J. `1 s& J* m6 L
( ]7 E6 C/ Q' Q" o8 H7 o8 t* Y問題第三步- N1 |$ M0 \# P; b7 U3 c, k! W
% [3 Y% V6 \7 Y. K* h, ?; G" b
Weight 1:  1-6> 7-12+ n+ P  }# V/ Q2 P2 _  Z& W

7 M6 x- o% j$ g  [Weight 2:  4-6 > 1-3 ! g0 q9 N& c; Q/ e: ^! [9 z
) K) p! `/ O& u" v% `" ^0 o2 V
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