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6 h& k* D5 f$ o1 o( P

$ A/ Y/ I3 a+ ~『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)。& d3 D/ v/ g* ]1 q; v
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？』
) G8 p1 ^2 m( f7 F; c; z$ w' D" r, q6 {: Y4 @
注意: 6 `4 \  r1 X# o
: D( H+ I( V& b+ E; q. Y
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" n% D3 x0 S6 P/ ~# a
" A! ^9 `0 q- i9 c3 D: 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  , hide 字要連埋 , 內容 = 答案2 J+ P, k$ w  ^, P0 Q
% C# c- b$ }$ S, ?8 h
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:# M; L0 J7 [1 E- x/ }9 R& F
相信e條題目都有吾少人玩...

8 c- r6 p! J. E% f+ o我以前畫左個chart去答,
( A4 d" _( x8 E" E$ A% H等我搵下仲在吾在
1 x1 M  A0 p; S7 `3 l' c9 Z% `; y* d2 T4 P" h2 W3 F) E! y1 {& ]
當日用左37分鐘答１２粒波子，差７分鐘才合格。. S5 e0 a* I8 A0 E  `
13.........4 q; ~( K9 S2 r/ o3 I/ V# |
# e/ Z& C" c# \- N: m$ I
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:1 m" }6 A2 \$ ~7 R

7 p7 M* G& O% e! J0 j# c我以前畫左個chart去答,* R& ]1 D1 Q/ P$ H* {8 B
等我搵下...

/ x8 K% m& q3 O6 \# j3 L1 |6 z3 O! A
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:; K) F8 N: ~- n# C2 c. s
唔識隱藏...已經諗到..

. e% \4 \* {7 y
7 ?/ Z# R7 ?$ i' g4 s; Psor !!!....e加改左: B, t. K1 t6 S. }

" p7 N6 f/ o: q* Z2. 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 n* T3 E8 f! x9 W  d5 m9 r" A& h& Y7 e, o9 @8 {% B8 \. W
[ 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+ t9 K4 ^7 ]6 X$ w0 a- |, w% p
相信e條題目都有吾少人玩...

3 ?$ M& f# q% N7 v2 N; [7 F' ]
) Z) |/ V3 h" ]9 M& |) E$ n7 }
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
+ f. }; X4 k7 U0 @' r) ?1 }0 s' c+ ~
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
2 D' c: _" o0 m/ }( \; K+ X) N) y+ C* V

, v* t. E! s& C8 X# [2 m/ P) JPlayPlay, Let me know later who has the right answer and I will add points accordingly.
2 D) S! a# Q$ `4 G' w! `
. C+ t: U: N' Y, c- hThanks

9 o; t6 S  ~/ u5 J8 A" H8 v% B& H5 O
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.$ ?' X2 A8 S- |6 D: r% f' ]
1-6 vs 7-12
1 ?" G: W" i% O2 ^2 s* Y! j3 eif 1-6 = 7-12     13 is fake: j9 \# Z8 Q; S5 t

( L. _6 d1 s9 u5 O1 q) R2 @if not
& o; I! g8 u/ v+ y- R- H& T( W5 q. Z
Weight the 2 time
: F! o0 j1 _$ h! a  Z  i8 \ : s( R2 a* ~+ ]
Suppose 1-6> 7-12
7 M$ g3 z" R2 h/ J: v& c
- J9 {$ f$ @; }1-3 vs 4-6
6 X6 x/ B- O, O7 b2 v9 O, ^* R% }1 d0 f% @
Then Weight the Third6 B% t0 A/ h. G# k9 W' \
3.' a8 [8 M* N! S; z

. [7 I8 z* ^) O2 H) L+ B. KSuppose 4-6 > 1-3; ^' ^$ A* T. s1 ]% ^6 H) N  Z: v

% e' o  G7 |, g. E' q/ O7 ZJust like the first Step- t4 w% T$ j' M+ I
6 u! C. u  @8 G" o! d5 O
4 vs 5 0 [6 O$ y) L. }3 L9 i/ U* m! b( q, p
4 P" R9 o& t4 R
if 4=5 6 is the fake one 4 p8 t8 T* Z: ^- G( d- T$ U; S; f
- Q- Q: [6 k/ i( g; s
if 4>5  4 is the fake one 6 J8 g% }8 B4 }! h) Q

- @2 X9 d+ m* Iand so on......................

hello1997

分3組4隻波子秤
- n/ {6 @' u1 V8 L  [1 M9 G; ^- Z: [) I8 T7 v7 q
Group A: 1,2,3,4' W2 g! v4 S* O
Group B: 5,6,7,8
) t2 k( `5 }. U: [0 g/ n) jGroup C: 9,10,11,12
1 a( m: ?5 @3 _, r% lGroup D: 134 c. f) _8 }9 ^1 o$ l3 o0 _5 G7 n4 S

, p% N* `. n3 b4 YRound 11 l2 d9 b/ t: L" v. @
Group A vs Group B
$ d( o7 E0 o6 A' ], e如A and B一樣, 即較輕一粒在Group C or D" y9 S, _; A% b. }% T0 y# |
/ o" f, U; r& l% T% w
Round 2
% m3 o. r6 E5 S再在Group C拆成:6 W. a9 t0 a% s/ ?$ t0 m' O4 M! i
Group Ca: 9,10+ E' v' c* p# |1 U( ~* T
Group Cb: 11,12: k; r" E- t7 L, Q" [7 `! K4 J- f' J, ~
然後再秤, 如一樣, 即13為較輕一粒.8 E; T5 ?1 W& m+ \/ M

5 h& E& Y8 m( H/ _% w如不同, 即較輕一組有一粒較輕波子在其中,
8 R7 J/ I! u0 Y0 W& e1 A, A; Q要再秤, Round 3, 之後便知答案.
7 p8 H0 ~) d; U! s: ^
8 i! w: S9 Q2 H' k* h& ke.g. #1 假設10為較輕的一粒5 X- |5 L7 L/ f  _1 L4 G
Round 1: l7 P2 N( l3 _1 H) ?
1,2,3,4 vs 5,6,7,8 = equal$ Z. p/ Y/ |( ?4 j. Y
  t1 u: O) Z6 p7 q
Round 28 ?$ n. T/ g, _$ ]3 \/ L9 a
9,10 vs 11,12 = 9,10 < 11,12, g8 m6 M1 `9 f" _2 ^

8 x2 A0 J# q3 L+ D4 L& n, B+ SRound 3
* t0 u% q# \% U+ L( f9 vs 10 = 9 > 10
- f/ m; D6 J4 P3 n% C! p1 q! n4 |0 x" i' Z1 Y) w6 q
The answer is 10.8 M1 r; H1 U' e: l

: D: f  R- }: v1 Je.g. #2 假設7為較輕的一粒1 g) O) A" x. J; j
Round 1' v% _( }, ~. [
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
! p! }. J- l; [% K7 H2 r- ~* \1 P) V: d
Round 2
' O% M! X  A1 ^" G) m5,6 vs 7,8 = 5,6 > 7,8
$ y2 g2 b% G9 u1 a6 H  q0 S+ C1 e
1 D4 Y% D4 A) ~% b! N1 D0 t# WRound 3
0 _# A+ D# ~6 x: Y: Y7 vs 8 = 7 < 8
  g" I: z0 R5 }5 G) b' q/ F' \- T& q7 }  ]
The answer is 7.
; t- F0 u% i; ?( r3 T4 P- U) c/ h; X+ C" |
e.g. #3 假設13為較輕的一粒
! B! a2 _  w+ J  z% F' F7 t: SRound 1
. x/ o/ _& b& ]- X5 u) o; V1,2,3,4 vs 5,6,7,8 = equal
4 t0 @2 ~) L1 b- m1 I) e# X3 Q1 I1 H% d& D
Round 2: j+ M) \1 d" ?3 L) X2 h
9,10 vs 11,12 = equal
$ U: v6 D" a. i" X% j
8 F8 ^. |/ {0 w2 m& x1 Z# _( zNo Round 3
/ x9 i# F" }+ E3 G8 A: M$ K& ?6 @$ n- ~1 [  C7 a/ @1 M
The answer is 13.1 n+ j- F' \$ {

+ c4 i6 A* [4 M' x( U唔知我答得正唔正確呢?!
& F) p/ X# [, L  {
3 A+ x2 f5 B4 o  O$ Q0 E9 s[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
& I2 g$ ^, e8 \# c5 G  i; ?1.& T: m" o% u. m8 \
1-6 vs 7-12/ Y- F' z9 Z8 _5 ^6 s
if 1-6 = 7-12     13 is fake
# j* ?4 E, s, q  ]  L4 z% ~1 t9 K- y# p+ ^+ @
if not
8 \' F$ m. K% F; b, O3 ]0 u7 e+ |) S1 ^
Weight the 2 time : E( f; J: E. h

( H( R1 y8 ~- N+ K! ^Suppose 1-6> 7-12
7 j* ]! V, \* q/ [
3 o. K- G6 e& t# H) |! A1-3 vs 4-6
3 j& Z2 {5 o, c" T# r+ b+ U, R0 C7 o% i
Then Weight the Third
; p# q: P3 F: t7 T% j3.
' S$ v2 R, W) t! g' W
) e2 T; t  J. ^, y5 c# l" iSuppose 4-6 > 1-3
9 `  Y0 o3 L' f2 o3 N9 q1 D; P- W% W: u" ]
Just like the first Step
- a9 @" {, l, H4 ]% k! V% \1 r$ l' T
4 vs 5 7 w0 g# Q+ z0 H# T' L: v3 m5 N

$ s! q8 F7 {  i, k. Rif 4=5 6 is the fake one # a) u1 s) F) i+ ^4 w- W. @5 m

* T; V( D( D( B; Aif 4>5  4 is the fake one
# @" U& ]! f/ r# x  m6 Eand so on......................

2 z. \& P0 M. P" ]8 ~6 g: f+ Z, ?4 A2 B; L# {4 d1 j  g
" k; B8 m# M9 ~+ M$ @6 S$ A1 f
問題第二步! \0 P. d$ i# H9 m" b3 i8 d6 b

9 l" Y$ a, R& r$ S4 {Weight 1:  1-6> 7-12
* z" O! A# q% H5 w0 |
, @9 v% W2 [7 W+ O7 cWeight 2:  1-3 vs 4-6 , if 1-3 = 4-64 n) F4 ]: M8 _/ K; D1 O+ g* i( |& W

  ]4 g1 y! Z( C5 W: F9 U你第三步点去搵 7-12 边一粒???
! _: C/ v2 @9 O: E
. d- }7 H6 H* C* q1 S( w; E4 Z9 K========================================
" r, e2 P: L1 m; b$ G, S
! y( |* o7 D0 I問題第三步6 z2 R- n. @) U

' }0 h( c" S5 G+ ~8 y* NWeight 1:  1-6> 7-12
/ k( A+ {6 M6 ]  I! l6 z
: D1 l" f6 D$ x/ A) r  FWeight 2:  4-6 > 1-3 , O# a, `1 _, S# E! i9 ~
4 m2 ], O4 U# R% k2 q
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