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
! i# m3 k9 U  D6 r1 ~9 n5 F3 O- G0 ?& ?& t$ H) i7 J
『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)。
, }- G9 \, m) X, Y; t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？』
) ]' U3 M8 J/ G4 E7 J/ u$ p1 T" g' j* {1 h5 G
注意: ) I. K  d6 m- S/ q8 _( ~% _! t8 B
7 `5 O1 R+ f/ F3 r, L
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! L& C8 Z( t& u8 U( }0 I
2 `0 W  K" D1 ~9 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  , hide 字要連埋 , 內容 = 答案8 B, e* C. V  F' n3 N+ n9 Y3 n
: H, j' a" W& X. e# ^4 A3 {) }
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:4 S# \3 A, T1 A. `
相信e條題目都有吾少人玩...

& j: r) m! a4 D我以前畫左個chart去答,
9 O8 r, t" ~0 d9 r& l* Y7 j等我搵下仲在吾在- [1 T2 P- c! g1 q4 f
3 }  G* J+ b5 {3 x
當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ {4 s0 U: \  T  h8 Q8 C13.........% c0 f- L- ], Q! {  W) {

+ T5 Q6 K, K! H/ G+ p0 r& L: f' T[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
' t2 d$ k$ E9 c; w
' c5 J; A4 N) \" s% c我以前畫左個chart去答,- L0 [/ l1 |1 D" Z* s1 r
等我搵下...

( F0 ]7 H  R3 U9 n

  P- n, q. j" {9 d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:
: ~; Y7 B  c4 l唔識隱藏...已經諗到..

& V5 }1 O2 @+ `' B" Q
/ [6 E0 j/ h. w# b2 x' |3 c$ z) q
sor !!!....e加改左  g; W7 _+ G* ?5 r5 U4 |( l

$ Y+ {7 ^' Z# ~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 ]( `. I4 y6 m& u; Z4 E) C. y
- X/ p) P( N/ L[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
- ^3 g3 E$ _; h# q7 C相信e條題目都有吾少人玩...

) x* ]8 `* d& B: T+ `4 e3 N. n% A3 O+ n( [' Z7 |
PlayPlay, Let me know later who has the right answer and I will add points accordingly., t/ Q2 l9 r+ t* @

" v( f; c: V6 ]2 QThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
% g6 g3 @# @3 ~  C  i2 r- O0 L: _. w7 J; |
! e- ~" V6 _5 }& w0 I
PlayPlay, Let me know later who has the right answer and I will add points accordingly.# W/ j$ x0 [3 e) x! E$ {4 @

; ]  v( {9 N: ^Thanks

0 g1 B  l4 ?2 P5 Y' u! a: b3 \8 z4 q* r2 [+ P" W) Q
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.6 t' B+ F( O( O" M8 s
1-6 vs 7-12
8 @7 j6 W. F# t3 Pif 1-6 = 7-12     13 is fake
) R( X1 u( `7 R& I: f2 b5 q
9 d0 \( W. H/ T$ ^' R* Fif not ) _# z! [( n5 X* C! f
. O6 X& I/ x3 w& v0 r8 G; M
Weight the 2 time ( I; L# G* y; c, w
' x7 s" Y/ F6 n0 z) K& Q, p
Suppose 1-6> 7-12- `3 ]8 ~& o! Z, o6 d
6 T" X6 l  b9 H4 O
1-3 vs 4-6
9 ~: ]. K# y  h( z" s, p, y& k0 o6 [1 r
Then Weight the Third
, f2 q: W, T9 S( B0 \3.0 Q% e+ t  ]+ V& V+ X
( P) g8 S+ {$ n1 [0 t5 |2 i
Suppose 4-6 > 1-37 z$ b$ d) X4 j2 ?
2 \9 C/ g# Y, O/ ^
Just like the first Step
/ \7 K7 S$ k) _+ I6 h% e8 B1 @% b; w8 `* D
4 vs 5
  Q8 T! {+ D. H# ~& u0 y* [0 k7 V1 n" {; o* G5 [1 H
if 4=5 6 is the fake one - ~; ^* ^1 U" R

. d& ]* g* |0 V: e4 k2 \if 4>5  4 is the fake one
4 M4 C! @# Z$ \* d- W. ~: M- `- C7 X
and so on......................

hello1997

分3組4隻波子秤
+ g: o) N7 ?/ b- b2 W, f: C% p
- h3 \! I8 p' QGroup A: 1,2,3,4
  d8 X2 n) d' uGroup B: 5,6,7,8
# w* S: }4 }( j, X$ `/ iGroup C: 9,10,11,12
, C% m& h. h) E8 v/ V) pGroup D: 13
* g$ ?7 }9 a# f% o# T5 t* B( ?/ _" a" n; o' [& P
Round 1
8 x* l8 h2 N- A* ~Group A vs Group B$ n& Z( w) [9 d% d2 q
如A and B一樣, 即較輕一粒在Group C or D7 z3 m8 x# |# t5 b) f2 }( `

# C( n# H; ^" Z1 r5 ]; J# t6 J/ ]Round 2% u4 a4 u) J3 `9 ?
再在Group C拆成:" I  s/ A+ M0 v
Group Ca: 9,10
. w$ G, R& A$ u1 A6 YGroup Cb: 11,12
! h! n/ h6 Y, g) H6 j1 ^: h  t$ W: {然後再秤, 如一樣, 即13為較輕一粒.+ `  z& y2 T" P9 ?, W

  c" o; e8 I4 a) o如不同, 即較輕一組有一粒較輕波子在其中, % E0 I% J5 D( y0 [( ]( z
要再秤, Round 3, 之後便知答案.7 w& h7 m6 B5 a# S9 X

6 b, a: d$ v7 g3 u. U2 Je.g. #1 假設10為較輕的一粒3 B* g& P4 `4 K0 P
Round 1
  _+ `$ t* T* u1,2,3,4 vs 5,6,7,8 = equal
* @$ d- w8 R# y
! H; V# d9 ?5 @Round 2: S- K5 ?3 @- n8 _& Z4 W5 d9 o
9,10 vs 11,12 = 9,10 < 11,12/ ~! f4 @8 D; A. Q/ b0 T
# w$ S0 s1 e' o' Z: u8 o
Round 3) X4 s+ F; F% c0 r, @: H9 q
9 vs 10 = 9 > 10( \% [% s( r% n" E9 o

1 A8 a/ S+ r2 g( |7 JThe answer is 10.
. p* b, h" }/ r# D: m8 z5 n! l7 i% N
e.g. #2 假設7為較輕的一粒/ i1 n7 F. h6 k, d  A
Round 1" `$ j# y' @' {& S, q
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8- Q8 B, |; `( ?: M4 n

# W, z# h( J' k; w' _Round 2
# g5 N" H( g( q+ `0 E2 y! A% s5,6 vs 7,8 = 5,6 > 7,8& v& v3 G, o" I% [+ {  q9 m

3 z, m) @* z8 m7 L# Q( URound 3
8 n5 a: i. ]$ X. {& h) K7 vs 8 = 7 < 8( r9 p0 s$ k8 |# {* J1 |

+ ]4 f5 C. ?" q, d" z& k. dThe answer is 7.
% t+ A0 P! \! T3 K, [& X1 Z* b+ R6 w+ \% b6 o1 \
e.g. #3 假設13為較輕的一粒5 P8 W  U( g! M# K) Y: Z
Round 13 i0 }. |- I- ]5 o9 h" j
1,2,3,4 vs 5,6,7,8 = equal
! G" m$ t: y) I/ k& m5 g5 e* R7 D) M7 v8 z) {
Round 20 ?- z! y% ^8 ?5 Z& `7 t: j
9,10 vs 11,12 = equal! H/ l1 ]$ |/ L4 V8 O( L& ^7 ~

, n. b& @+ t. V0 G2 D" ]# RNo Round 3: U; ~1 K/ a6 C/ {( Y+ F

# h5 U' d3 `) e" o; XThe answer is 13.. k" R3 \) z* E2 J8 f- k

& |6 }4 k* E' w9 c$ }4 H) {唔知我答得正唔正確呢?! 5 \6 \) B0 t3 s" {5 e- a; v
. R- n# s9 t( y6 N! q' q& z
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:: v& {0 I7 D; L6 N
1.& U3 E- ^* A* L( F1 t7 w
1-6 vs 7-12
2 j5 |4 z( }, a# G$ a9 ~if 1-6 = 7-12     13 is fake  ?( f& c, X3 Q$ o" z* T
" \' {( Z8 r" X) V
if not   r8 z4 N  {& I' M- G0 ~

7 ?2 |; U3 ~- M) o! ]) AWeight the 2 time 1 c& x0 ^  e( A4 g1 B9 v
  E2 |8 ]+ U7 \) i0 s# K
Suppose 1-6> 7-12
0 X/ E( ]6 R# f% p$ B# O; h  D) l6 m/ L6 }/ Q& t6 j
1-3 vs 4-6 9 r7 V% R3 m* t8 ?" Q

/ V% G7 {7 U/ F  [) w. n: Z* t! g9 `Then Weight the Third
# c9 P( Y; P0 C7 `7 @, c3.
) u& H" u$ Y! l7 w. O/ @9 N% @" s4 U0 h/ U* ^5 q
Suppose 4-6 > 1-3  }  V! c  Z9 a- t6 _
- E" b2 C  X) w5 Q# [) _% c* x
Just like the first Step# u7 _! p% G& t& U$ Z

' S& o+ D* w3 Z/ H  c) H  o4 vs 5
5 H7 H1 O4 S7 T) I- g
9 ^2 H& r" [  L) xif 4=5 6 is the fake one # h/ @6 Y- L. t1 n( \" s* L3 V

# f4 a$ G, e; v- k8 R. iif 4>5  4 is the fake one
, j3 a3 {" V# w1 G8 x$ fand so on......................

' ~2 G* W! ~3 a! K$ N% K

+ d( {4 ]1 U: X) [/ b0 E  |8 a1 c, \5 Q
( _2 H+ c' {6 `3 U# I問題第二步+ t) f0 w1 b/ Z: T

! t- P$ h1 d+ N- r/ nWeight 1:  1-6> 7-12
! e. J% M+ j5 W! x( {; \
; Q5 _/ P+ d  ]. k8 ~: [Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
  A  l' R+ b6 `% [8 X6 c' Q
0 J% P6 ]8 z+ Z1 F0 q你第三步点去搵 7-12 边一粒???
% o3 G/ g1 k3 R/ D/ W7 q' ~0 y" v" Z2 [/ p! p
========================================
1 Y+ X  P* }& O1 ?$ J9 l$ a' v" x7 v
問題第三步+ |* y3 o; m) l; N- `

% I4 H4 l# ]& z8 N2 m2 O  N& P4 dWeight 1:  1-6> 7-12
# D$ S- u6 E/ @2 t
7 s# \# E& ~5 i, u6 P4 ]9 SWeight 2:  4-6 > 1-3 ; {2 }7 e8 W3 x6 c
, W1 \2 `2 q% u5 k2 L
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