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
/ B0 _- t4 v& M3 d1 |! g  @0 ^1 O) M3 a, [
6 l. [- m/ 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)。/ E1 m9 f% D# a7 W4 t7 `
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？』
1 k* P. \' \+ h4 e! {- Y0 N, n
# M- d. y7 h* u" V1 Q% y$ X注意:
% k$ N, p' t# \. o
4 r7 U* ^7 C1 g: K* |0 s2 U2 I1. 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
, B8 s3 |8 X/ I% W# X  C  u- p. f; Q" n8 l4 l; k
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: S5 D( K$ A* N) m  w- ^1 R1 O) f* T' W
" h" i5 y/ q3 m& Y9 o" P. y
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
" L  t4 M  l9 ~8 u" ~# Y相信e條題目都有吾少人玩...

" M4 M) J% N  ~$ ~我以前畫左個chart去答,0 C4 w5 h5 {! s
等我搵下仲在吾在
; b  q+ w  ]! P0 M* y2 j) V, x! c' @/ E# `2 x$ I" x) v( `, |* F
當日用左37分鐘答１２粒波子，差７分鐘才合格。. K8 Q& k! E  i5 G6 W- i3 _
13.........! e5 m' n. v5 @9 ]% F9 C
2 {6 H' [5 G: Y
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
, w# X1 n1 g5 k1 T0 Q) l. e1 g  d" A) ?3 m" Y% ?( A
我以前畫左個chart去答,
( V, s# ^' D5 D/ A等我搵下...

7 X  ~/ w* `8 u; z6 A3 o
+ I4 q- y+ C2 L( q2 A" 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:4 E5 Q" [8 G# l/ o. Q
唔識隱藏...已經諗到..

9 O* u% r( X+ m2 V, \

# ?$ M& l& T7 n- M6 U8 a- `. `& usor !!!....e加改左2 K0 [( w. p4 X: h
4 J# s' R2 k, R3 r+ t( C; w
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
6 \4 |# i1 |- i. L6 B
5 K! g* [% @+ t: 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:' i. S" U) G6 V' L5 h+ T. A
相信e條題目都有吾少人玩...

' G3 E9 e% t* U! |1 h/ e

  \8 d. d% n! y1 V3 o" i! y4 B' HPlayPlay, Let me know later who has the right answer and I will add points accordingly.
9 x" D! r# g0 Z& ~- d9 S6 q# i, `; @
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' C: F5 l( `$ }5 l: z
# M5 K0 Z/ i" B  k. ]2 h3 I& ^9 B

2 X2 M. h$ T3 y, P' sPlayPlay, Let me know later who has the right answer and I will add points accordingly.! B8 E+ k4 m) V% o4 B, R3 X
8 g$ }0 H  m1 Q! D6 t# \$ d
Thanks

% l4 [. N# R* E" @$ {  s/ P2 w
+ Y$ G% l4 a, L6 b' x) [) T不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
/ R# ?) g$ [  \- T1-6 vs 7-12( ]9 T2 u8 s0 w) I; F* L( [! _* Q9 W
if 1-6 = 7-12     13 is fake5 C5 h: X4 ]' L! p: o

: Z, j; R5 z# u; H  {7 Sif not
( k; h0 U6 y( b1 S* R- f4 F9 \  o; r9 O; W
Weight the 2 time
6 ^8 h+ W; M  i5 r2 w" d1 D( q; a9 Q* r
7 n9 J5 ^0 A2 r* F# U8 `7 XSuppose 1-6> 7-122 v3 l) }7 n3 e1 ?6 {$ p$ @
9 u' n! @! [: I8 {+ M& _9 I* e
1-3 vs 4-6 ! K# {  o/ o5 g: j( O% P7 i% c
" `2 T& V% P) w  N
Then Weight the Third
9 C. l8 I2 v2 D* \3.
4 x$ l) p0 i( h5 z- m
) _2 L+ ~) o' f' x3 `) \Suppose 4-6 > 1-33 w. e: J' Z0 x$ K, ~/ `4 n

: L" \) x7 U* T1 O, r% lJust like the first Step
& E& \& T2 o# h. d1 I
+ t  f5 G% J. P" R/ y4 vs 5
" g6 P. B* Z. H" x3 U! y4 e. Z9 k, r; S) f2 {9 f% O
if 4=5 6 is the fake one 0 u7 f" e3 d4 u) W' ^% r
1 i" H. g# e  z
if 4>5  4 is the fake one * A8 ^5 q( k' @

+ b8 I. D$ ?8 u4 L) n) d/ vand so on......................

hello1997

分3組4隻波子秤
6 U# F7 i, A. I$ ^& y2 S3 \5 W/ j
Group A: 1,2,3,4
9 F# ^! d( y( w8 [Group B: 5,6,7,8* n* D. W% e+ d1 d" G+ v. v
Group C: 9,10,11,129 H- }5 c1 Z& M: _3 _2 ~6 Y- ?
Group D: 13% z; w4 p0 F; b& P- b

5 a" B9 d/ z# ERound 1& J% Z$ n- p. A' n% r
Group A vs Group B
6 p5 t/ d) V0 u" [9 @+ F如A and B一樣, 即較輕一粒在Group C or D( e& c8 f9 b( x

$ G: z( F. f  D$ A- `  ~Round 2
6 ^' V$ N( }' b9 c& N0 z# f; E6 }! |再在Group C拆成:
$ n+ T+ W6 G! Z* R+ Z% n; V; SGroup Ca: 9,10" T& }# s" p9 r! }, ~3 @
Group Cb: 11,12
5 U7 [4 _- X  X然後再秤, 如一樣, 即13為較輕一粒.+ L% g3 _  X6 C: p

' ~( N$ P, X' z) g如不同, 即較輕一組有一粒較輕波子在其中,
, O: ~7 {' t! d; S9 E要再秤, Round 3, 之後便知答案.2 \  D& v- E5 ^* p2 h
4 V) k, }+ z2 U. f& b
e.g. #1 假設10為較輕的一粒, k2 O' u# r2 |" g9 ^# |! |  {
Round 1
# E% Q2 g# X. t# A$ P1 ]: I' L1,2,3,4 vs 5,6,7,8 = equal6 Q/ Q% e; |! Z0 E% C: D1 X# _

* G6 n& W9 ~, |  o6 ^# KRound 27 Q! H- x4 B( Q6 J! u  {
9,10 vs 11,12 = 9,10 < 11,12" w' D6 B5 Q4 l5 A) x
% u1 h; l/ ]% z3 f9 E7 S
Round 3
& M/ f/ t1 s2 f. ~* R+ B% [9 vs 10 = 9 > 10! k6 l/ ~: b' I$ m) M2 o3 W' E

1 Y# M3 b+ g0 D$ E6 C* C2 \The answer is 10.
- e' ]0 ?( T9 {: v# k! V# L% c! m7 f- j2 |4 y
e.g. #2 假設7為較輕的一粒0 Z0 \) X, S' X1 u. L
Round 1. F0 ^) ]! x0 k3 N' e
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,80 J  X) c8 z. ]8 o" K! e/ ^

) P7 W  k5 a% g8 \: W. D- ~( nRound 2; n6 R) |1 I  W* G9 a8 D
5,6 vs 7,8 = 5,6 > 7,8
" ]3 i% ^2 M) `5 [! T4 t: H; j- G" k9 J9 Y3 a4 T% G; F
Round 39 U, X' \0 r! @2 B7 e
7 vs 8 = 7 < 8$ C/ h: W1 l& r  i1 A7 M
6 p) Z4 P+ R+ M+ k. E# m
The answer is 7.
6 S: M" @! P6 I  i, U# R+ [  e6 K' A7 t" d1 p
e.g. #3 假設13為較輕的一粒2 ]& K$ w( d% J+ {' d" e
Round 14 w) J( c2 Q* m5 N
1,2,3,4 vs 5,6,7,8 = equal3 t9 i3 k, v+ ?. d% y/ I

+ k: Q2 V( B- ~. f! tRound 2
1 I: S$ W+ a  v) r! p2 e) v9,10 vs 11,12 = equal6 G/ a- V% l4 B
% g4 d/ s7 Z' x5 T! w( J
No Round 3
* u, J) m+ u" m0 j" L1 S
5 _: m5 Y' o- t; N/ U8 }The answer is 13.
& D( e# q$ o: Q2 [# X" y. ?5 Q$ Y
唔知我答得正唔正確呢?! 3 ^8 J$ P  t- f8 ?9 R
6 V' R* Y7 o  n+ k% P0 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:0 M& o: t) I8 v( A. T1 {
1.
5 L0 [( i7 K4 u' h- r# P1-6 vs 7-12. g  a/ u. z; n, F* m
if 1-6 = 7-12     13 is fake
+ S0 D# |$ r; k" k4 v; F3 i- v: Q6 z* g) n7 z
if not " h! j3 x1 E. y2 o* F  F

& w0 N4 @2 R- o2 h% G$ yWeight the 2 time
1 _' z2 b" d+ P! n7 O% d8 Q# `+ g' P. W) \' G9 ]. x
Suppose 1-6> 7-12
2 p8 o) n" ^: I2 o3 p
) ^6 {; o* ^$ V( v% q; z1-3 vs 4-6 / `3 N% {0 F" z1 G
5 K* l  |2 B4 v4 }/ I% L
Then Weight the Third9 _% R- n' Z$ Y  x" ^! H7 w* u) b
3.0 t7 M# a6 |# K; [' S" K0 l
" k8 x: \/ I; q  v7 h$ B
Suppose 4-6 > 1-3
" ?" O# N( H, i. [: t
3 ^0 `9 H# C8 l: DJust like the first Step
4 l0 M. o5 A1 u1 B2 R* I4 |) V6 B0 `0 z5 G0 G# S; _# x* y
4 vs 5
1 R! ]/ N% ^8 z' _* \
1 }- s: \! i, Yif 4=5 6 is the fake one
. h. `0 _" e* ?: ?0 e! f- t+ }: p& |
1 y: F$ J$ q5 Z! pif 4>5  4 is the fake one
2 U# \9 v2 _8 [* M( s& m9 u  C" @6 xand so on......................

; N( w! z8 U! |: H6 U7 T2 d$ p$ a

; D& `7 k6 I4 b8 }( Q' X1 r; B7 A1 @5 w( p; J7 J0 O
問題第二步
( q/ w, T3 }3 I5 ^5 d3 I. ~8 H* l% Z- }1 {: ?+ P2 l& V
Weight 1:  1-6> 7-12
/ Y) |2 m% D7 C) R
/ o* w- @1 B6 v  z% V. {Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
2 z- e# m3 W) [0 }8 a2 h! W8 h
* E/ V- D$ f6 N# Q! ?( ]& j2 x你第三步点去搵 7-12 边一粒???
+ F. o7 h- S) w, _
3 \: y; B, K6 Y; s========================================7 X- W, l0 [, d, \! j) e: C2 d
/ y7 J+ `( z0 L8 o& x
問題第三步( o3 Q% J; |: R0 |1 Q2 `( d5 z( p1 R: W
: {* Y& R, O" }8 K- \
Weight 1:  1-6> 7-12/ l8 |0 E% m/ z' J
* z+ I; ]! _$ r( l6 s" Y
Weight 2:  4-6 > 1-3
% p1 y7 Q3 r, v2 Q/ r0 y* w
/ _5 {  B. `9 }% d- J: d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