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3 U$ A+ ^/ Y1 ~$ V, D- A7 F
) T8 z" R0 j! R. ]
『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)。
0 Y* o. Y# ]& p: G" |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？』
' S% A3 z* P3 ]0 t; v9 z6 ~: j' X. E& I8 }
注意:
% u$ u! ?* F# n) L( \8 s: Y& K2 ~) a, p! q4 g, _! R( R
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2 W. w1 Y% _  K5 q
2 @3 ^. u$ ?2 Y* {8 T( E2 i! 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  , hide 字要連埋 , 內容 = 答案
) M- I& T) I# L& F; F9 j0 J8 y; s5 {" E+ W! W( H( W: z, X. ^
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:  C! v% o# I: U' c/ J( K; c1 d
相信e條題目都有吾少人玩...

$ W- S- j, A# m. [) u$ V: b4 j我以前畫左個chart去答,! d6 f! ?8 l: j' q* k
等我搵下仲在吾在
1 q7 k9 M$ U) _3 h" t
( V0 V0 ?. X1 _當日用左37分鐘答１２粒波子，差７分鐘才合格。4 e9 o. \* Q2 `8 _
13.........
7 b, |0 j& f$ ^" a5 C
1 s% f, s! c; o- A# |8 R0 _0 B[ 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 I: W1 T3 n/ }1 ~3 P" t
5 G" y  |6 F5 q( Q' O
我以前畫左個chart去答,- M7 m* I. s: E0 T
等我搵下...

; l, J6 D6 T. X$ ?
2 q. d' c5 b$ g" 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:
- n. Z$ @" o/ B( q7 o/ v& ]唔識隱藏...已經諗到..

; `1 f; x+ Z, Y4 _
5 v# Y  Q3 J  p) N- ^$ x0 }* Dsor !!!....e加改左
0 n9 ]) E9 o# o, {! b! M; _' \" K& T7 `3 I, G, i6 r
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
3 }6 \* k5 }* j" W9 T# c8 V! \
6 S: i2 r1 u4 b5 N9 ]$ t1 H& h[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
+ P' j3 g) T+ i* i相信e條題目都有吾少人玩...

1 L" V% E" ]+ f" C

: B! d% d/ I/ u/ e1 VPlayPlay, Let me know later who has the right answer and I will add points accordingly.
  ^! e  d/ s/ X" i* T; d: v( ?* a
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
( x* w. r$ z' S/ O. Y; k4 ^" ?
- T1 E7 m7 b0 o1 u* }) R
$ Z, t& X4 u# t7 e6 }/ KPlayPlay, Let me know later who has the right answer and I will add points accordingly.) {: Q$ B4 `# s$ k9 t$ U" B" g. Q

# @0 l+ C& k; U: {6 Y' zThanks

5 ?- Z0 d0 W) l7 r

! d' B7 A6 R- M% s不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
" D1 p, b. d: \4 m$ c1-6 vs 7-12
# e) k* V. y3 A0 Dif 1-6 = 7-12     13 is fake
8 Q6 C5 L* x" ~. s3 N# g
) ~" X/ T2 O' H7 s, V% R0 cif not
/ q/ I1 X4 E2 {/ w3 V6 L  a  C
5 K* B. L* K6 b2 j, f% qWeight the 2 time
; J' X% D3 X' [. F& Y' a4 I 5 b% n+ L/ n( S
Suppose 1-6> 7-12
: B7 L$ V! K  e/ a; u- F" {9 ^3 h3 S3 v0 Q$ k$ e$ D6 i1 F9 z
1-3 vs 4-6 . h  z. e/ k! s* l- [

2 L: R( E% p& u7 z& }. E# ^. yThen Weight the Third5 X, h( {/ Q2 N* U! Y$ ~0 Q
3.
5 D4 ]; x3 j; X* l; Y  H* n4 v  [1 p6 ~9 K3 w: t
Suppose 4-6 > 1-3
& \6 w; L& L1 \  {. @1 K: X: R! A- p) E/ ?
Just like the first Step
: H1 d2 W4 ?2 a; e: R! d, j! E7 d% y/ g
4 vs 5
9 ?% e+ l/ A5 `% p8 c
& b2 \4 D. s7 E0 D' kif 4=5 6 is the fake one ! f- D5 m! j- }5 ~! s
" k# F: K  I! u: s) ^
if 4>5  4 is the fake one
+ U& n  M2 p" l6 q3 n  U
3 ~" i" L/ H. l& v5 Y; _and so on......................

hello1997

分3組4隻波子秤2 M0 d1 S9 J& c5 L# D- N

! R4 F8 X2 {- RGroup A: 1,2,3,4
" M5 O. b# C, B: o" y$ O8 C& ^" \# E- DGroup B: 5,6,7,8
. c) S6 ^4 D! j( `5 k2 P9 ~Group C: 9,10,11,12- H. x! p$ ?5 v/ h* \
Group D: 13
5 L/ {& }1 L* b0 O& }
3 E5 X; m* }3 J, x; W) C5 {Round 17 x$ O( @/ [" `- B- H5 F. \! r
Group A vs Group B
6 e5 e; b' A/ i8 @: k& g3 `如A and B一樣, 即較輕一粒在Group C or D
, t7 F& ^" t4 x* Q8 s0 f
1 S9 ?: ~) {: W" M8 YRound 2
; @& ~; I5 p+ G9 t" h, ]1 e; i再在Group C拆成:( ^6 V9 \6 z$ p, U
Group Ca: 9,10# y) ?0 n) Z% F# G" l
Group Cb: 11,12
- ]) k' y9 ~/ b" j: r+ y( k2 a# o$ P3 N然後再秤, 如一樣, 即13為較輕一粒.
" m6 x8 F0 v! `0 O  g* a. N5 K5 o% b' D. t* V' Y1 u
如不同, 即較輕一組有一粒較輕波子在其中, / p# H8 j! F( r; ]" q6 m
要再秤, Round 3, 之後便知答案.
  ~9 O4 k' m( `/ C+ ^* i0 R- ^( g
% @) [7 `! U% Ae.g. #1 假設10為較輕的一粒9 {0 r9 y) c/ T9 I2 u" `: K
Round 1
  A/ n: v  I2 U' B. z9 L; {1,2,3,4 vs 5,6,7,8 = equal
" v! b( y: C( Y& d# d$ S
3 O' L, t( \$ g: F+ _% ~Round 2: L* G" Y7 G/ }- M
9,10 vs 11,12 = 9,10 < 11,12
0 f" \" ]) `8 e( q) s9 u! w+ `- m' }* d2 r6 m  Y$ I2 G, T( g' l
Round 3
" _9 I- j! w: A9 k9 vs 10 = 9 > 10+ p, z3 [9 P1 K" A$ x

' e4 v' c  o- i; m/ b, KThe answer is 10.4 N8 Y( D; ]; t8 N5 x1 x
0 k' l2 D* ]( n( V) _& j
e.g. #2 假設7為較輕的一粒
  G% Y1 C  C. b9 ^3 R. ^Round 1
5 q- e2 h" U7 \1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8$ a8 O7 y  M7 I

: a/ h, J3 l8 B3 J% U7 URound 2
4 D* s4 W* E% I  q" G' R5,6 vs 7,8 = 5,6 > 7,8
" Z2 x. Q' f. ?  d5 T5 t) F- Z" e  y* e+ I. k3 l7 ^
Round 3
5 s: s! e- b6 c# W7 vs 8 = 7 < 8' _* e- G) o* h7 Y' s

2 M" b" |2 h  X# w, @; CThe answer is 7.
: W+ @; B5 ?1 a
4 S) I/ c+ l. we.g. #3 假設13為較輕的一粒
% D( l/ A- q/ ]% k" `Round 11 e  Q! e% u9 {! g) `) [7 L/ p
1,2,3,4 vs 5,6,7,8 = equal
$ i; g* t; K5 I# s9 E  w6 g0 c) f" ~: z5 ~, r
Round 2
' t1 F" @+ q) X- \* n; Q9,10 vs 11,12 = equal0 p$ a* d/ Q' t* E
4 m6 W+ t6 A# w* n" ^6 b( y) b
No Round 3
2 N! ]/ }' X. M) l& H6 M+ b8 E4 q
The answer is 13.2 u  M+ f! z' B$ Y. i& j$ n' g& w
5 l) C: P& W) O: D. g
唔知我答得正唔正確呢?!
/ E2 o6 S- m$ a% ^, t% j
% I( X) U2 Z6 a: u4 \; z: I[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
8 P* u  R) m; b: C/ Y1.6 d) |" G0 Z5 r0 x# K$ M7 r. B) l- q
1-6 vs 7-12
) X# k3 T9 K8 I+ _( b# Mif 1-6 = 7-12     13 is fake
% S0 @& {5 J! z3 Z: r$ e
1 x8 q& V1 l$ aif not ( N3 M) s* N2 a4 `/ y9 D

0 F6 S0 V/ A! \: ~! BWeight the 2 time & J! d" @" _, U9 c7 x2 ~

! x! h9 _  u0 ]+ C% A3 T' [Suppose 1-6> 7-12
0 _& w2 ~# l7 F  V  e1 l7 q+ m9 p3 h( P
1-3 vs 4-6 0 r' M7 O' d& x) ?/ c( T

( |) W+ C8 S+ o& X: n, jThen Weight the Third; H* C. ?: q7 `1 \" X/ [, x$ @
3.
/ x2 T& ?7 c6 Y( y( F
3 t: N% x# j) g8 wSuppose 4-6 > 1-38 F7 [; ^. q0 H0 q$ x  B' R
) z0 P; G  i* y( d0 T3 G7 }! M. ~3 x
Just like the first Step
; u5 g% s+ s9 [
( F) z) Z5 \& l1 X9 D+ ^/ i# U' c4 vs 5
3 D/ E7 U: S* ~( K5 K% w% Z; U3 D3 K; z
if 4=5 6 is the fake one 9 x+ @$ E; E1 n& R/ e4 s, J
6 @0 o0 s9 Z8 i8 H
if 4>5  4 is the fake one 8 o- c9 O- _& D
and so on......................

: R2 l6 I5 Z4 c+ e9 e5 M
, R4 o9 R& U$ L5 |

! Y5 T+ T2 u3 [5 m問題第二步- ^0 n* Q  q/ @' `; L; R+ w( K; ?

1 u+ t6 b# D2 q' M  s, W/ UWeight 1:  1-6> 7-123 S6 R1 {  w7 b9 e  f0 q

# a5 U( H' @9 c3 p7 z0 b) JWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
1 b9 s6 A& \) \2 E6 P# ~: O4 h' M: c% R$ g
你第三步点去搵 7-12 边一粒???
+ r" g! J& u" ~/ s2 z
# j3 V9 g- M% ^========================================% ?5 j: w5 O0 i5 d

( [/ U1 @( B' \' P; H1 a% V問題第三步5 p( t( \0 r0 l7 b) K; s

) \" q: @( S% O: L9 X4 P1 C( CWeight 1:  1-6> 7-121 a+ E/ Q; R; x  _& G3 N4 U  P
0 P- r1 i/ h0 \
Weight 2:  4-6 > 1-3
: c0 ]6 }$ E! h$ |( C8 t3 p- T2 m# S# a: `" R
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