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. t) T4 [; I- x* l6 c) d

) V+ L: b8 a) y' g% n『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)。
, d, c  w1 H$ y+ Q: a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？』
6 m: F: i, c" T2 D1 z
0 Y- J/ E6 \7 Q. {& E6 t9 c注意: . P9 v5 S4 p' U% |2 s; _9 n

4 {1 e9 `1 x8 @) y) _6 P0 g1. 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$ X, t) W+ r8 k$ E' `( I
0 U0 v3 a" @9 _  i: b) U$ `3 B% X  x
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
& Q3 A, @' ^- L9 z, ?% j' ^- a( C+ A1 X* [$ n2 G% r9 s
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:6 f( t* g7 |, F: \8 ?1 F( [$ o4 R
相信e條題目都有吾少人玩...

7 d9 Z. n. T4 k
我以前畫左個chart去答,) v; `, M8 [4 a" D! [! U
等我搵下仲在吾在
$ b- G+ m/ @) E! R
  m$ w# h% `$ v" p' H當日用左37分鐘答１２粒波子，差７分鐘才合格。
' R3 k5 p; I- K  W; c  l, s7 @3 M13.........
. e7 |4 o+ @* F' v4 e
  Z: |  j* o) R8 ~[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
$ f& B! }% E* G8 P. }& R
: ?( c  Q6 b) N3 j' p我以前畫左個chart去答,: ?6 Q) k% @# L+ |& M
等我搵下...

. l4 Y) L0 P% U6 r; P' q9 ~
/ c+ ~  v- T" `- Z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:
; N! w. H+ T6 O! X. A- H+ ?* X唔識隱藏...已經諗到..

6 E: Y; Q/ j& D1 f5 i/ U% O- n( ]# S2 z" [. Y) T" _
sor !!!....e加改左
4 b" {0 Y2 O  R6 K, o& @& z2 Y. c' o6 N
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
/ t* c7 M" m8 ?$ e; U) g2 Z, Y: d' b. x) R6 K$ ]
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:+ g# D3 _/ d" g
相信e條題目都有吾少人玩...

  D+ k2 o) z) C; a, U9 K  I' ]: I, Z, W; c
PlayPlay, Let me know later who has the right answer and I will add points accordingly.: ^% Z  s1 `9 q" d: l

) I. Z8 T. \% k( Z1 Y7 }" `4 M: |Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
. [4 R$ ~& S. Y) h; e9 c, @# p6 `. g8 T* r3 o$ A, z& c  ]0 I) K/ G
) A4 L6 x8 P/ V7 l; C" V
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
  i0 B% X8 c0 C5 f: E. H, d% L5 ]7 V* c1 c7 Q# S9 ]  G
Thanks

, r, Q" t4 I( L+ y& X
2 G! Y& d. [  E6 L6 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* M' @" l" K
1-6 vs 7-12
0 T' o: I6 H! U' Kif 1-6 = 7-12     13 is fake
! @4 a$ c2 F; r) G; \8 X# t: [
# [8 C2 L$ @& g3 P& R* n) bif not
# A, c3 I( z+ j1 [) [: O
% \# n. U( R# B2 T8 U8 ^$ K7 C+ O  XWeight the 2 time
5 L3 x' |3 a& P4 r: R& c5 Y5 \ ' w. l4 D/ G6 H4 C! z4 t! [; v
Suppose 1-6> 7-12
2 p/ }! F0 H9 ]. o5 ~6 q
) X" q) W. @8 ?/ @2 M2 b  U1-3 vs 4-6
/ L, @( E+ O0 a  u/ _+ r  _" x" h, a+ T+ ^; S1 j; R& A
Then Weight the Third: e5 [: d  ?2 c! |/ D" h. }
3.
- c- P4 g& F* m/ F( _# a& a% d& A. }# O/ J3 u1 B" b- A
Suppose 4-6 > 1-3
7 ?' w2 u! X( ]- r8 ]# K6 g$ e
/ Z0 [" ^% i% a6 M4 a1 e$ ?( z! }Just like the first Step) l' i2 |% A+ ]" V, t
3 c! P! R* T- H( z2 p1 P) t
4 vs 5
  w1 j5 z0 a9 y3 {+ A, R/ U9 J! E) t6 V0 b
if 4=5 6 is the fake one # p# q6 t8 [* d$ l9 q5 X; j  l0 q! t

5 h7 V; O. V) E; @! eif 4>5  4 is the fake one
6 G5 ?! X) L' V1 e
( j3 W& h7 V9 @6 [( e; \) @and so on......................

hello1997

分3組4隻波子秤8 |+ y& g8 K: V8 Z" {5 p" q8 V
  ]/ I; o- k2 _3 X7 @! m
Group A: 1,2,3,41 W- o) S4 \: U3 Z0 X2 j
Group B: 5,6,7,84 h: j, f. \( w0 ]0 x
Group C: 9,10,11,129 X& F! V* @, Y# p3 \( s* k; G% Q
Group D: 13
6 Z7 G# w) D4 C: N4 J: }# n5 ~% p5 [$ {, N
Round 15 p* t- K! }/ e6 P) j* `( j- I  ~
Group A vs Group B& e2 D3 q7 L/ a
如A and B一樣, 即較輕一粒在Group C or D
! `7 x. Z: ?2 f- _6 n- Z
( x( @7 j0 g- J6 pRound 2. t. P( v+ n# {& w+ e1 Z4 ]3 u6 D
再在Group C拆成:
! x, B# d( i+ t: \Group Ca: 9,10+ k: u& ^+ D. i# z/ K% p# I" R
Group Cb: 11,122 h' a, L+ U; T
然後再秤, 如一樣, 即13為較輕一粒.
5 W! K, J) Z' v4 F7 [5 f  X( t" t+ n9 {" D% u
如不同, 即較輕一組有一粒較輕波子在其中,
: ]7 U* g' P. ^6 X9 y: x$ A( g. A$ X要再秤, Round 3, 之後便知答案.. i- m3 G# X# D. P3 d) E

7 O) k& D- ^3 R1 W; W% j/ le.g. #1 假設10為較輕的一粒9 \4 Q; H! R3 \: @
Round 14 G; p, I# l8 _; D) ]% Y
1,2,3,4 vs 5,6,7,8 = equal
4 n9 ~1 Q- u7 \" y) C/ x! P+ p
: T: `& b0 q0 \/ ?2 L5 M' g. ZRound 25 s9 T7 I& |& _1 f2 k. i* K
9,10 vs 11,12 = 9,10 < 11,12
0 Q: X, y; Y  g! t6 r, s  i4 j
- f2 K  |3 C7 O  T2 O+ J3 K# tRound 37 g7 x2 K4 U' A- q9 `% m7 G
9 vs 10 = 9 > 10
' f; W5 b- E1 H% a' ~1 D, ?" s
% I8 D! y* l" }8 ]The answer is 10.
  K1 o' R# i$ Q4 o& K. a: f- A4 A( S* ]  `
e.g. #2 假設7為較輕的一粒; X5 J4 Q: z- O: M
Round 1
* ~' L# v8 ?( T3 k1 L1 H4 {1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 |8 H8 x% n% Q: n6 I
" U* b' T' x7 V, E) N
Round 2, D: W& J  s/ N
5,6 vs 7,8 = 5,6 > 7,8& `4 ?8 H% R1 T8 N: G1 M* M

  U9 |5 X2 h- m) G! RRound 37 f& F) ^3 S. Q) y$ {, N
7 vs 8 = 7 < 8) m( A$ u% `" g. X5 o
7 Y2 z5 R3 H3 y
The answer is 7.
4 `) T# m- ^3 A
# _: C/ O: d+ x: |8 d* ]e.g. #3 假設13為較輕的一粒
& Z$ [1 d9 E. L3 b& `' k  v. r" `Round 1; S$ j' N5 N( p- F) L
1,2,3,4 vs 5,6,7,8 = equal5 y- z2 k: I: ]/ z" g4 G) o+ ?; ]

, ~6 J, U, j8 v' kRound 2+ T  [5 O0 W) }7 D* K9 o$ ]$ n( i
9,10 vs 11,12 = equal
4 ?5 w( r% b# f, v1 X6 c5 T* f: S: B1 ?. t% s5 F
No Round 3! U6 e3 ]) ^; d

0 U! w- W$ r# w- HThe answer is 13.
9 r! ?' n( j" M1 P
, G: E' P* _- W6 u  N3 v4 a唔知我答得正唔正確呢?!
0 P6 {2 I2 O1 x3 j8 g3 @# G
2 _" ~5 L$ {" K- }% 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 M8 b  _9 Y; `9 `( k1.
# f( ]* N# n4 P2 N' s1-6 vs 7-12
& ~9 Y' I& t( m# Gif 1-6 = 7-12     13 is fake
+ ^9 W* f3 N( I' `' j* R  C& U* h
' B( o6 T- a5 `! M8 J6 q# ]if not
4 H: Y' V& z: o( m. E% V, c# r1 V4 k
Weight the 2 time
( U. ^& }' W* D, S3 y. c9 K2 E5 U7 p9 U9 r( x( ]& Q4 r6 M+ N$ s
Suppose 1-6> 7-12
5 `( I3 E8 M  x9 ~/ h/ W* A, R& t0 m: T3 B
1-3 vs 4-6
6 S: l2 t# o5 D7 o) K, T! {! Y; e/ n8 g( G* Z: u3 T0 o. P7 ]. U
Then Weight the Third9 T! C7 h2 h! x9 o; N' U
3.1 Z, J+ M# T3 ^4 |
: t5 L" i8 P2 B7 P( C7 x
Suppose 4-6 > 1-3$ N$ G& Q. `7 r/ \
* i; }0 i" A0 T& \
Just like the first Step
/ \; j7 r7 P) o; }! w* a" v( ^4 k' e
, I. l: ~- d: a3 R" R- \8 c# }4 vs 5 & K4 C; e" G3 u! l

0 w1 \, o& \* u8 ~3 j8 S8 o. M6 sif 4=5 6 is the fake one
! n6 ~8 h# V2 `0 O7 N3 n; P7 ]& B
- G" {5 F  `: b. W7 R( O8 vif 4>5  4 is the fake one
) g: z0 W9 E: k. z1 Gand so on......................

1 I4 b2 A8 Q; Z8 W6 J* s6 @% g
& j% ^0 h1 X" O: s7 w& U/ k' K) K
問題第二步1 I" l+ g9 N* p

5 g6 ~9 P/ m  q& {* j8 lWeight 1:  1-6> 7-12
6 E+ ?; [( J+ k) C; }- s; z3 c# u+ w
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-69 i, B, X7 ?, `& w+ k' n1 O$ N
- ^3 F8 g& X! l$ {
你第三步点去搵 7-12 边一粒???0 F, j* b8 h- ^8 m9 i
$ r: D4 j& b( l( `! x* G. A& ?, a
========================================
) t1 }: b* o4 t: e5 {, n) {  \/ \# R% ~+ ~" E
問題第三步
6 @% C; a* {8 Z
  e' T2 A& n0 Y$ n% d9 x# WWeight 1:  1-6> 7-12
+ A9 F. X( d  H! y' R( w5 _3 f. |* W. o
Weight 2:  4-6 > 1-3
. q0 u* t5 j% C+ ^* P9 R/ W" r% K0 p7 _3 G+ a1 c0 V6 ]
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