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- F# f1 t" r3 L: M

3 H2 @6 o4 X! Z$ N  X『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 T4 U3 _" Z' F5 Y, Q- J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？』
) y" s; [9 K" Z7 R
6 R1 }7 e8 A4 @  R; a3 Z2 W注意: 4 T& ?8 @2 D" ~1 D% p: a0 I

1 f. B- B" v9 {- g; Y1 e3 B" o1. 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; u# y" C' k' ?9 W. R6 f

, f( o" K2 u3 g0 n6 m! `$ o2. 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9 k7 t7 @8 m4 R' C7 S! R
4 Z+ T6 h% `0 L6 y* Y0 M
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
; E( w* ]7 s- K相信e條題目都有吾少人玩...

7 r& w' {9 R4 @; g4 W7 F8 K/ O
我以前畫左個chart去答,
; Q4 J5 u3 m3 x  d3 j, d等我搵下仲在吾在! l1 w% s$ ~' {
; U1 g' |" ]: l) J3 h* D4 q/ {
當日用左37分鐘答１２粒波子，差７分鐘才合格。% U9 f1 S8 g& Q( a
13.........
" ?/ g: ~; R0 d: s( x* }/ n& Z3 W! u/ j- d+ h
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
3 D" N5 ~" j* A! S: J- a) q7 X. p  i; l4 O. G% u
我以前畫左個chart去答,
- j. B$ [/ i; q# W& T' V等我搵下...

2 g% y( ]9 s% @0 [/ K. W" d4 H: Y: I
' ~% V) d* r1 B8 d# b# |0 c/ [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:
, ?5 i8 e% C7 E  h唔識隱藏...已經諗到..

- M$ ?: @4 ~0 S3 E6 x7 }6 D+ w* g

, |) N0 v2 f' z" tsor !!!....e加改左
5 N2 Y% w1 L+ s. ~+ ]* Z9 u' K. j4 l) c, F/ o
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! U: W+ d+ W9 `

8 @( \2 L+ K: t: g+ n. J2 r[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:+ u3 W# g! C# _; T
相信e條題目都有吾少人玩...

, t8 o1 X2 G: t8 m/ a8 Z! m
0 m' B, k3 {9 o1 b- o
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
8 J9 k' Q: {- r, M) O1 _( E4 s( y1 M# x' O7 V) p  F) I5 o* i
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:2 z. M9 R: V' b7 D* E

% K) N% R& O) l8 d4 e- Z( b: \1 p; e0 B5 o0 ^
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
: H4 x7 p) ?0 d
- }0 [1 e8 v0 [( x/ ]Thanks

* T4 o% E% G$ e7 l) f0 b1 {) H6 q
0 A' h, N$ }- k1 W* X5 t
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.9 E( n+ F0 |% H2 t
1-6 vs 7-12
6 d$ U2 c% ~; ^+ [: vif 1-6 = 7-12     13 is fake
# z' T8 ^4 ^7 b6 a7 C5 J. t% Q1 }6 k% g
if not 3 k2 V* A- r: i# z  `
/ Y( i# f1 d9 S" Y/ B) @) Z$ ]
Weight the 2 time
2 Y) }. l$ h& B, T 5 i) H2 [6 Y0 s' E) s
Suppose 1-6> 7-12+ d( P+ P1 O$ U/ h
/ Z+ N+ w( F* j. b! ]
1-3 vs 4-6
1 J9 {$ H9 x+ z. D, E6 Z
! y* N% W( z' |. [Then Weight the Third
1 J9 F7 {' u% i7 s5 }7 T$ ?8 f3.6 r9 O# {" Y6 i% J" \) i" A$ a

) z4 ~) J% [* R6 z' LSuppose 4-6 > 1-3* p( p" w& c* L/ O
$ V( v; `8 Q4 }5 U. r
Just like the first Step/ i# e5 X8 M4 y+ {. w: k/ B' h

! W# y. n$ I3 O4 vs 5 4 R: X' j& K% u9 h  d
3 s$ U# f  n; q2 g
if 4=5 6 is the fake one
) N1 I( g/ V$ N# M- x+ a2 w# r  H
6 v! s$ u9 q2 u3 F$ sif 4>5  4 is the fake one 9 G9 @* p; A" w& n
( P  E/ K* p0 C, P
and so on......................

hello1997

分3組4隻波子秤" m1 O& [  {) b2 O

6 ^/ {' O3 }* S& F( n. \Group A: 1,2,3,4! {; |" p& w5 ]  c/ z/ a. {, g6 _+ h
Group B: 5,6,7,8
6 O: S/ D! j+ a. Y7 A1 {Group C: 9,10,11,12
( u: [9 H2 m, O  e3 h) B3 n& fGroup D: 13- m: }# p- _4 ?$ N4 A+ B

. J. J! e, L% ]$ uRound 1/ y5 L& |8 O& X. z8 T8 t5 p; e
Group A vs Group B
4 R" L$ M$ o% o+ A/ Q如A and B一樣, 即較輕一粒在Group C or D6 G) g# E3 U; k5 G3 b
$ f# d, i" s+ q  s. ^  Q
Round 2
5 M9 P* e4 v4 G( }1 T* `再在Group C拆成:
6 O- @% v; Q# F1 \2 s/ ]Group Ca: 9,10" o7 M  U& r) a
Group Cb: 11,122 G( ~% M' K' n6 P' d# n- w" M
然後再秤, 如一樣, 即13為較輕一粒.; L. h5 L+ ]+ x) E- [

! m/ O% K1 o% Q如不同, 即較輕一組有一粒較輕波子在其中, ; G3 k/ p6 h4 p4 W
要再秤, Round 3, 之後便知答案.( n+ U4 J3 }( F2 T" E  M6 h

% x+ z! H! E% Ge.g. #1 假設10為較輕的一粒7 N, Y7 i" N/ `
Round 17 p, B9 ^8 `% ^* b  b
1,2,3,4 vs 5,6,7,8 = equal
" b- x- r. j  d. h8 `" c! \
3 @8 g- S0 ?& n7 D2 \! KRound 20 x) z3 i) Z3 c0 d: w
9,10 vs 11,12 = 9,10 < 11,12
( L; {7 W# M) F% J1 X/ j  x+ m6 f" }  u. M
Round 35 T0 v  L" j4 _  X
9 vs 10 = 9 > 10
& k2 p  c# V  D+ D7 h( v+ Z- ]4 q" P& y# n  j. [1 ^2 `
The answer is 10.3 G" h- Z' i5 Q' c) G9 L. p

7 N: h' p" o7 W4 K9 j- N! d* l; qe.g. #2 假設7為較輕的一粒) h( e. ]  W& l% c' y3 C
Round 1
( V1 U1 I; p- C$ {/ f2 Z4 h1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8  I" p2 v2 k0 d" a9 S8 Q- E

! J# r( b7 H$ ~Round 2
& k) q8 }0 h0 c( M* N5,6 vs 7,8 = 5,6 > 7,8
+ J( l8 g. ]3 D' U" ?! {1 `; }' x
Round 3& w, r: J/ J& j+ w5 _* w
7 vs 8 = 7 < 8! A0 l& N- B: v, C- @

. K( u. h7 V4 a7 S, {' P$ EThe answer is 7.
. _" O# ?- C! ^. y5 |$ Z3 R  D  P$ H/ R# p3 \) D& U- y5 a
e.g. #3 假設13為較輕的一粒
. m" c% U8 t$ L) \" R0 h" sRound 1: i" c7 \5 V/ X, ~# ?
1,2,3,4 vs 5,6,7,8 = equal
! @9 V8 f; m$ x( n: K( z
/ [) b- u" E% X2 Q4 f% ]* A6 aRound 2
7 x# }3 Q9 j+ N$ \6 t' K. h9,10 vs 11,12 = equal7 P2 v+ ]/ i1 u3 p
1 V1 g1 ?/ q) O, G( d/ x0 f0 I
No Round 3; u6 n1 Y, |9 `" T# A# T

# Y& l+ j, {! c. M- Q7 sThe answer is 13.
$ |. M* ]7 ]7 i" `; y
; o7 [/ r/ o! }. W$ S; ?唔知我答得正唔正確呢?!
; c& \) K$ J5 f$ q3 H+ ~
$ ^7 j( ^. y, y- R9 O. j[ 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 r- Y' P6 A7 c: U! q# Q
1.  t* Z* A4 K: t
1-6 vs 7-12
' S" K/ m% R! W& ^' iif 1-6 = 7-12     13 is fake7 j- y- g! Y" Y; p6 S, q8 h, T' A
1 E$ ?6 w( v2 ]; y, ?
if not
- O8 \0 Q7 I3 |' O$ i  r  g7 |# C4 `1 d
Weight the 2 time 3 Z$ h, P0 J7 N, M; E. J
/ H9 A" K8 @% {) g3 z: q6 P
Suppose 1-6> 7-12
* c  k- O7 u1 H8 z3 ?7 i0 x" Y
$ `0 b; W. M* R+ A1-3 vs 4-6 + B3 U: H6 I) P# a6 w8 u. k

, A! z  s' ^/ x9 e) ?Then Weight the Third
& F6 o, O: D6 R+ R+ R) S3.
. K* A- q" d0 \  h, K: [7 G% i
- A, {5 O" \7 I' _1 G  JSuppose 4-6 > 1-3
9 [0 o2 D( W" d3 k1 V. M1 Y/ @: Q3 o! g. ?( M
Just like the first Step
: \. t. k5 V9 F8 W1 ?% D/ q
+ \, A2 I) ?, H5 t2 |4 q4 vs 5
* g' t5 m1 ^( n- Q! U# B, t1 C  g
if 4=5 6 is the fake one
( M. N! [) ], X& t1 |# U8 O/ P: b5 \$ o* ?: R9 `2 [
if 4>5  4 is the fake one 0 ~  [+ W. U5 Z$ X
and so on......................

8 \) ?- A4 E% V+ w' U0 |
3 ^/ P: x+ M& O6 P6 r* J
9 k# w& q1 W, Y; l
問題第二步
1 s+ T) I( K8 l  @$ Q- s4 {; V$ R1 s% Y# s- i9 q* l' w
Weight 1:  1-6> 7-12
5 a, t, v8 @, P: v5 V+ D( O6 H1 U6 `6 J
$ U) D! Z/ `$ B+ a+ D( z, zWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
' i# _; m7 z) j$ J1 D. C) m0 A/ }" K0 T- i7 `; }
你第三步点去搵 7-12 边一粒???& F2 w- L, |8 E  B( l  N
2 W1 L; t0 B: F$ n/ e
========================================
/ ^. `7 z, k3 q- ^' n1 G
, V* R2 ]2 ?' D( Y- w問題第三步
6 V  B/ c8 {* q: J
. W$ @8 S# t# @, V4 L0 M8 HWeight 1:  1-6> 7-12* n& {1 T6 D% u# ?& v5 Z

+ D9 R* Y/ W3 W' n* t* o0 W+ s6 ^* ]& {Weight 2:  4-6 > 1-3
4 G* m8 w  r; R* \2 |+ R7 X" _
& V6 X- q4 T" A6 T( y% m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