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
; c4 `& o& W% T3 x+ {8 e' K4 o
& X/ n) b7 _) v$ j+ n3 o『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)。
8 o, {& w% z8 p6 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？』
8 [- n# R% S' l3 U" ]% P, p1 Q+ h" k
注意: # I; n: S1 n) x
, w9 i) v7 N/ l4 F3 U- ^
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: j' W) L# a" B7 f0 {0 O$ J$ L0 I
6 T& h4 _# o- v3 a' r, B
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* h+ _+ \- j, `! L) h

+ L9 N6 M7 e% T) m! k[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:9 Y% Q% i( E3 }% V/ M4 A8 M
相信e條題目都有吾少人玩...

& C+ H1 X. q& a1 g2 N/ z7 n2 |7 Y我以前畫左個chart去答,
/ O% ~- o# W( H; v) Q- ^等我搵下仲在吾在
( _; D% _4 w7 h; b( G4 L" t) J9 r* d$ O  U( j6 y
當日用左37分鐘答１２粒波子，差７分鐘才合格。/ Y4 d2 D2 }$ j# Q/ T# b) J
13.........
5 x5 A6 x8 v# V% x
1 c. d; N; i' q6 f7 B% e[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:+ @) l+ a5 w: l$ e( o
, T. r6 F7 G( O, P
我以前畫左個chart去答,
! N+ e6 c+ d+ d8 v$ l等我搵下...

; U1 K8 P7 A9 H( u/ }. e, q4 F  q
4 y5 h! p& c- w3 }1 @1 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:
, x% o! e8 A. _' u8 N唔識隱藏...已經諗到..

7 Y3 V  w- p& O  o7 J& K6 l6 y1 d) U, }/ {/ Q( }1 |' c- ^- u" r2 h
sor !!!....e加改左
( [' T- u9 V. N. f3 W6 J. g* f) T+ I# x$ v9 m& |
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
0 t7 I, d" |  \1 o/ ?- M1 ?* B4 ?! m2 X- Y
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ u$ N  q% I& b( b) P相信e條題目都有吾少人玩...

& E. z+ q8 O% d: X+ G
/ Z+ z9 {, z0 I: M
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
7 }$ v# g- L- e. J) ^4 Q
2 P% e! s0 s3 w/ c- u: g4 e: w: K! MThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; t" `" |6 w- r& y1 j  Q
! {3 o' k! Y8 U  q# C4 a

2 l# P- k1 i$ ZPlayPlay, Let me know later who has the right answer and I will add points accordingly.
4 C0 @! o7 e) ?4 Z2 S0 @8 Y. I1 K' N3 @: |6 _
Thanks

# v3 V2 U6 F3 u  y( k; p0 ~

  ]# C# ^) X5 z4 I不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.0 _; q' a8 O  y/ g3 V' f
1-6 vs 7-12" y; F: J; x. X
if 1-6 = 7-12     13 is fake8 x; f6 H  v2 V) K: K! O

9 V1 a5 H+ c8 h8 g: {  h7 ?' wif not
" y4 k! n9 c. C9 r; U" `
$ `7 D0 W) {6 H% S) V6 CWeight the 2 time
7 ]9 a/ ~' w, [0 Y  M
% d2 [7 W; m* O* FSuppose 1-6> 7-12
- s1 W: b3 M) h
6 p4 s: V. i2 [1-3 vs 4-6
+ Z& L6 H( w" \; O5 x9 J5 U
& {8 J, I# T% d. UThen Weight the Third5 I3 H. F$ M) ?$ |8 S/ X9 O0 ^
3.
' G- x) Q5 Z' f5 v- q# k) c. r. P, @" d; I  R. W0 t6 Q! @# e  k$ R" l  a
Suppose 4-6 > 1-36 L* j4 r/ l8 f( n) S! m" K
0 |: b+ F' f. D
Just like the first Step
( X, E* O$ I: M# e8 P: D4 M3 H! X  u7 J! Z0 c2 L
4 vs 5 9 _8 S) ~5 c( U; c1 H9 g: R
: u1 P  J. s, o' x1 n9 |, B) K* W
if 4=5 6 is the fake one 5 ~- _. Z* r; a' F1 ~# g4 c
& _5 e$ [5 q2 Y" w
if 4>5  4 is the fake one
" h8 t5 Y3 U7 A7 e# S9 m, T6 k" Z! _  n) T+ z
and so on......................

hello1997

分3組4隻波子秤
$ L: n) F/ \  l* Q$ r- i+ C1 |$ q+ B: @7 t5 d( P; p1 p5 r
Group A: 1,2,3,4
# L1 d3 c0 \+ dGroup B: 5,6,7,84 B* Y/ p& `; U; j
Group C: 9,10,11,12) D$ e% N1 G/ v! [1 O  q
Group D: 13
& }- p) n  |. U( m# i( C( i. s6 f4 R1 O; [" t5 q
Round 1+ h% R9 z) J! L: t  E
Group A vs Group B0 \4 r' [3 `) S# g) d
如A and B一樣, 即較輕一粒在Group C or D9 y: i& E1 |, h3 v* E

, i3 @' }4 H( f: iRound 2
9 T% h# R1 W  j- M6 v再在Group C拆成:
# Y* S8 U$ V. t; m6 QGroup Ca: 9,109 y4 ?" ~& A  n% w) z3 R
Group Cb: 11,121 L0 v2 Y3 J# |8 ]
然後再秤, 如一樣, 即13為較輕一粒.
' y  S6 g& K6 M9 i5 T
2 N: _3 ?# e" G9 r2 r. {如不同, 即較輕一組有一粒較輕波子在其中,
# ]" H% G$ i6 e要再秤, Round 3, 之後便知答案.9 {1 e$ H' B# P" \2 G

) [5 [" v. n* pe.g. #1 假設10為較輕的一粒0 U! ]+ [- i$ e& w. i% q3 D3 p' g- s
Round 1
) b# _( e8 j# }: k" _1,2,3,4 vs 5,6,7,8 = equal- R) E2 Q/ ~" V9 h

- ]& m7 l# A% SRound 2
0 |( ]$ N+ |" S( E# F, i9,10 vs 11,12 = 9,10 < 11,12
2 @7 q% Z9 @, `. Q0 D' a2 x+ p- S' C- {4 h7 {! |. T/ l- j
Round 3
8 _6 e5 l1 k6 Z9 [, k) h! P9 vs 10 = 9 > 10
( j# s: H- k- @
  n! E* W9 V" ]' |The answer is 10.* ?* |3 |4 G7 i8 Z  M/ @2 X9 v

8 P/ l+ H6 D, ?. b+ X7 J3 [1 ae.g. #2 假設7為較輕的一粒
9 _( l( D# J7 |# X- `Round 16 p& L* o. b7 b5 H
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
0 T3 P8 F2 G" j! z" @5 ^0 ?3 z1 r; ^. h
Round 2
1 y+ v$ a) j$ {8 d" X/ S& V2 \, H8 m: N7 p5,6 vs 7,8 = 5,6 > 7,8
, O& B' ?% b( J; I7 p
. m* h( N: r7 Z- ]+ j8 yRound 38 b1 ~; J, g) t) g9 O9 l% C: T- O/ P% h
7 vs 8 = 7 < 8# F" S- j  q% j+ z2 O2 o

% ]* |# h% C7 f7 L7 lThe answer is 7.- q$ X$ `" n7 c! N1 ^  J5 i% |

7 c5 r0 b, Z& h1 e* |; p6 y# Oe.g. #3 假設13為較輕的一粒1 z) l. k3 q$ ^( X2 q2 U
Round 1- D& x0 Q, d) X8 M7 ~) |
1,2,3,4 vs 5,6,7,8 = equal
! W3 O9 i0 o) H% Y, j  e4 q. x+ X7 I/ j4 s* p2 ]" U: T) Z$ @
Round 2* [! P: b$ `* @- f. _, w% z
9,10 vs 11,12 = equal
2 ]# o9 S$ z! t4 u# i( g3 o- d7 f& b& X/ Q- E" N7 r
No Round 3
$ O. h5 F: u$ x$ ?  f' u, ?5 S3 w9 b. g9 B4 G9 t
The answer is 13.
) r+ N" ^( w: ?, F' w" M( p- o' X% f9 Z
唔知我答得正唔正確呢?!
% F/ O! w8 d4 L& j: e) l5 _  O9 p- |" m. R2 y" y
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
2 \! i' c: {. m- Y4 u" Y1.) V0 g/ S% b% ]) J% k2 ]
1-6 vs 7-126 I' D1 _7 r# b1 R' e8 M! G9 O
if 1-6 = 7-12     13 is fake  m  B1 X1 y# i8 d6 A

: ~1 r2 J1 G. b1 g/ Pif not
% \9 L; s9 l" ]1 M
- R( V. z1 X$ o$ z& i. A2 {Weight the 2 time   M, N# p1 r1 d4 E
# ~- g/ J: c& v. i- B% l( ?4 g
Suppose 1-6> 7-12
6 w+ V4 N/ |9 X1 _: F0 {9 A4 q" q  p2 ?( Y! u% M! N  l6 ]; a5 a
1-3 vs 4-6
) G( e: e! {$ R/ O4 F: A* i/ N6 _5 b) U  G9 S
Then Weight the Third" V( M/ u- O6 n' L
3./ u9 C5 i+ O* Q- x' z4 j: J
1 }4 g; x2 j/ B# C* F
Suppose 4-6 > 1-33 m- P9 p- E9 U( k# j. e' n/ b

& L% d1 l, X- c" `: \Just like the first Step  t8 q% z6 j( U( V' ^

- ~2 X( G" C! u" V6 \6 ]- X7 U4 vs 5 8 _/ y' i$ ~# b- |$ i+ j; ^
  P+ `* \6 F  c* P% ~6 s: |
if 4=5 6 is the fake one
: \" v; Z! p1 t0 n
- Q. h6 }  R. X& M) p8 Fif 4>5  4 is the fake one
& c% l: s7 k* Y5 u+ Pand so on......................

% C8 J( u' W! F2 i9 x  U
; Y4 }( ]9 p8 y6 U

8 K1 w2 d7 s0 X2 I; R& U. ?問題第二步+ w; E! t7 P! W. y) {9 l" g2 f$ e

2 ]' N; a( @: ~, JWeight 1:  1-6> 7-12: f6 p" h) {4 n

; V, t  W3 c" ?/ n* N( E# a) u( sWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
1 _9 x' w; k: N; U' z" k; y8 R+ Z) H' Y3 i- L/ V8 o
你第三步点去搵 7-12 边一粒???7 d( l& e: m- b# O/ A8 B

" x0 m: @. e0 n/ ?1 Y, b. n6 g4 x0 d========================================
# F6 L: @% v1 [' R# C; D: P
6 A- m# p: I2 M5 b. D3 p0 \$ r& ]8 A問題第三步
3 `# ~( i+ i9 b& B& x; Q- Y( U, g: }6 e5 Y! a, B
Weight 1:  1-6> 7-12; `. U2 G8 e1 q! |, c. f! [1 c

" c3 k& E! V, `' ~: w& c$ aWeight 2:  4-6 > 1-3 2 ?1 k# Z2 R4 e& U, `4 d

0 |9 P5 q0 z; e! O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