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
$ g: Z' G! k" r& h& f" z* x
: g% R9 ]+ w7 f' n『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 m( k* w1 n3 `5 Y
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？』6 x; Z) X( {( [- o
* Q2 G+ z- v3 _' Z$ v$ o, Y
注意: 6 n& W. A5 t8 c3 ?$ Q

* _: n3 u' S2 ^" u1. 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
' ^5 U* _& N/ ]
; u. u! c$ f6 {$ y7 {; G, D2. 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
. L8 ?) Z4 G3 X8 D: p/ t4 H6 V9 Q8 }/ K
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 T; }; q; {+ w* i0 I  G9 G9 L相信e條題目都有吾少人玩...

4 }0 g8 ~; o6 G. |' X
我以前畫左個chart去答,3 S9 J$ Z8 I" N4 B1 V3 O" e5 m
等我搵下仲在吾在
) t9 u; l: L4 y$ m% k  z: K$ [! [& Y, D# {/ x5 }) M  w9 C5 P$ o
當日用左37分鐘答１２粒波子，差７分鐘才合格。
4 [) s5 P7 V' [1 S5 H8 [# E13.........
5 H" H6 ~& K( b) a
; V# V1 T/ t* M! |[ 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 v8 `/ I' a6 f5 P7 }3 M
( t# }6 {& a1 P0 r* f5 S0 D
我以前畫左個chart去答,$ ?2 `$ q: G- u# l0 N
等我搵下...

" E' k/ N5 W3 H) Y$ X1 W
0 c: m% d, d2 y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:- B. D$ v0 T) j/ g- L4 f
唔識隱藏...已經諗到..

. [! T$ }: s, R3 R* S1 l9 }; J
1 p& T3 a6 _; l+ O; M, l
sor !!!....e加改左
" z- X7 I' m% h! C" h2 Q# o7 \) V* ?- J2 L& b+ ?5 @& c9 ~
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& Y; W! ~) b3 I! Z
$ N* q$ B) o, j2 `' ?6 ^/ L1 X
[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
. W1 c# K" P  X0 i. v( i相信e條題目都有吾少人玩...

% N$ O$ e6 `" {2 g9 T! n. A
6 F6 _+ i! d! L1 Y. IPlayPlay, Let me know later who has the right answer and I will add points accordingly.4 o/ k3 [9 U- Z5 D0 N1 r0 c

6 V! q9 m; d1 T% aThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
& d# o- B# W* M5 i
8 p" C# |* w. S; D5 S/ T1 r" i% h9 V$ C8 D
PlayPlay, Let me know later who has the right answer and I will add points accordingly.6 Y) z8 W4 v4 X; J7 _( y
5 J. K' J* s& a" Z# P4 f) z
Thanks

7 T2 i: D# ]' {9 }8 Q; P; x
/ r! O" Y- ^* r  D" n# q. W6 {不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 J( o! E% `. Y& x1-6 vs 7-128 r4 {6 }) V3 n- N
if 1-6 = 7-12     13 is fake3 u# ~2 A& f4 f' ]! i
& L) ]2 z/ I7 n$ B
if not " ^! H0 w7 ~' F
4 C7 f* P9 F0 l
Weight the 2 time
- S5 V+ N# q$ Q+ S2 M
% H% l) j) e( Q: y) s, i" DSuppose 1-6> 7-12% G# W* F& t6 t* G% e8 {
2 g# T8 p1 w( K6 E) [
1-3 vs 4-6
% U* `3 }8 }: y1 u* |3 h' g# Q( c: Q" q& {& U* Y+ Y" J6 F- l
Then Weight the Third; j: m, `( Z2 H+ Z" L
3.
! ]9 P' z  r  M) p: H" T
6 R2 }  P( z: l& ?. r6 kSuppose 4-6 > 1-3- T0 D* C, ^$ q4 {! d  p

1 W' N% {7 Q  h. jJust like the first Step
- y6 D. H, |* U) K2 J; o9 V
& f* o$ X! [& b  l* i' [1 o8 o0 F% {* S4 vs 5
6 Q( l, O" j( W1 _$ w- L8 [# t- G* B, @7 b& Q0 u! X( F0 X" c6 ~2 J
if 4=5 6 is the fake one
5 o' S& I5 }' s/ ?# v' u9 y6 e: h! {( Q) M" E
if 4>5  4 is the fake one 6 S# ^6 m2 x1 w( c$ }0 V

+ `& n" D) t2 A! w4 N/ o- J( ?and so on......................

hello1997

分3組4隻波子秤
5 K& h- v5 }  U& \1 K
* \4 f% {0 \( J0 c+ l( UGroup A: 1,2,3,4. B, O2 x7 u' B* z- `
Group B: 5,6,7,8% t2 t! T1 b, v( m8 n
Group C: 9,10,11,12
3 G: L$ H8 x. i( @Group D: 13+ W% W2 u5 n3 ?" x$ d

2 W3 _2 Z' W  t7 x0 Q; h9 N- u; j8 bRound 11 |2 l' i3 k- Z% ^. i
Group A vs Group B/ |- k8 J( |9 B. S; X9 M
如A and B一樣, 即較輕一粒在Group C or D
+ F4 Y0 d* B+ o: R7 g. K5 x- S1 b. W; y/ h! I! Q7 P$ J, p
Round 2+ Q" E& p2 t$ ?2 y5 A4 j
再在Group C拆成:
0 a9 `# p: y( B0 \, SGroup Ca: 9,10
* O: Y$ `/ l$ f, y5 l6 oGroup Cb: 11,12
( F* S: W. R- Z- M2 J! [2 G8 l# {然後再秤, 如一樣, 即13為較輕一粒.' q9 c5 ~) u1 ]5 c- e

/ f2 R. W. q8 f0 r8 b# F& R如不同, 即較輕一組有一粒較輕波子在其中,
4 h% ?& h+ W/ b! I( @要再秤, Round 3, 之後便知答案.
/ \! I; \' s- O; O/ ~6 U  s8 h% N- S7 a. L; x, S6 w
e.g. #1 假設10為較輕的一粒& p0 `( b  z: q! w9 r7 K
Round 1
: n% L7 S* D. t% y  [1,2,3,4 vs 5,6,7,8 = equal4 r" M0 j# W+ Y' G

7 D: D0 k) s; }2 F6 F$ e* v) L7 BRound 2
( D+ A# K; c$ E9,10 vs 11,12 = 9,10 < 11,12
* ^9 I( i4 E" R% M/ E% q( n- p* H- _1 l& _) F! `' y7 j
Round 3
) s. Z/ t" m3 v- e* M$ C9 vs 10 = 9 > 10
- Q# [) _- r5 g' K" X6 z3 h8 e4 B. }5 q2 {' \3 {
The answer is 10.' B9 Y6 h. t# K% c  l) i

! a- x% D& _2 [e.g. #2 假設7為較輕的一粒
' ^6 T0 R* c+ f, FRound 1
- \6 I3 P4 e# V8 w' D  v# h5 s1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
" ?3 d- x- R& Q7 b" z$ K$ M7 e0 h
5 `7 P- \' V$ l( U" q& jRound 2' g7 U) p; t; v
5,6 vs 7,8 = 5,6 > 7,8
5 G( ?: O6 p2 k* J5 H+ g5 W5 k% m! b
Round 36 I! r1 j& Z' l3 @! b* x+ U
7 vs 8 = 7 < 8
8 p' M2 M( y, ?6 ^4 k  p
# o* r$ y! @! @$ ^The answer is 7.
1 z) q+ p/ j. {9 ?9 h3 a; g: {* b2 ], Z
+ U/ h1 T* z8 f9 l$ J' Be.g. #3 假設13為較輕的一粒
+ V0 \2 b  `" g$ }6 W( lRound 1
. e3 G* H$ u% k0 I0 G1,2,3,4 vs 5,6,7,8 = equal7 b& @" q- Y: k% e* ]0 ]" \

9 P+ H& Y# n6 x5 a6 d: IRound 22 g$ {9 s0 Y/ [+ p6 l
9,10 vs 11,12 = equal) |, v* p. O6 M( s5 E

; E4 L2 D4 C& t) l9 ~, v0 ENo Round 3
  {6 q# y" J# ]! H- S5 R7 U( C  a9 ~5 s7 Y' [  P. z4 p3 `2 s& @
The answer is 13.
% I' j2 o$ t$ U, B
7 k$ b6 a) i% f8 S* z) X8 Q唔知我答得正唔正確呢?!
3 G  r/ P% E0 E# W6 m0 Q
7 P' j: o" i' c" b[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
( x" f! t9 `4 N4 W1 O* c5 c1.
9 l) i% W: i- s; d1 i' F! L1-6 vs 7-12
6 g7 Z  ~: n/ c7 H7 d+ F4 Bif 1-6 = 7-12     13 is fake
2 f6 M! A! h+ z2 G9 Q* q5 {# Y/ c# R7 e) E5 r1 u4 y+ T! y
if not ! S- X2 u' j) ]; k# T! V' W$ M
/ i9 N) O. L) C1 V* l% }
Weight the 2 time 0 J  z+ d) }1 x6 g) `+ C, m
. d; j( D' `0 q% P' o1 \
Suppose 1-6> 7-12
: P, ~) N, J/ {( e8 c) w
) h0 E- }6 v* w1-3 vs 4-6 9 h: X; {( G/ M! F) W! P8 o

& x- }3 m8 N: l/ o5 c/ o( L- p6 UThen Weight the Third
7 K5 O6 i1 l1 x7 d  ]' O8 T3.! l8 p: D3 }6 w2 j; I8 k

# `( s6 k  X4 \1 j8 f' RSuppose 4-6 > 1-3
2 K6 V. Q0 J% G2 S$ C5 k
9 B( a9 U7 `3 t. x, Q3 NJust like the first Step+ n0 k' y- o* H6 ~7 u. {
" H6 c1 _: {9 j& e9 P, v' l4 G- K
4 vs 5
+ d% T3 U3 i6 B- y+ L6 l) s& g9 C, I( E7 m$ J
if 4=5 6 is the fake one . O/ h4 ]# l  t% @1 }2 C6 o

( `* }: C$ m! V6 t0 t7 Wif 4>5  4 is the fake one
7 u8 L: d" y$ f7 xand so on......................

/ s" E' I- I2 P7 e
$ s4 l/ d, w8 y1 {
) K. I: _5 T% y0 R
問題第二步
- I1 P  w1 X- w# U, h* m
: X/ W+ A/ T. T, _$ c' U: F; kWeight 1:  1-6> 7-12
5 I4 u4 \! ^/ J, X' B, ^5 X8 \
% A7 L2 j" l$ j2 wWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
3 c3 k* {. w( a) K- F/ r- M
" z# E2 k( ~5 v$ U' v! R' e你第三步点去搵 7-12 边一粒???& `: J: z/ E: \2 {) K; P
. q+ w1 y" a& n2 R* h
========================================
9 s# M5 z& E# G4 g. C; `" E8 s0 H8 f! U2 z) @; t
問題第三步' q4 u9 ~2 a: `$ T- H) E" K" Y2 h

. c# P4 T* j: _; R+ Y  {! @$ k6 n  IWeight 1:  1-6> 7-12
* ]! k; ~5 Y. C, [/ C: V2 q! Y- I, ?& M; M# Z- e
Weight 2:  4-6 > 1-3
2 v! Z; l3 o% S4 N( M$ }% W& Y$ q5 A/ P) N; X9 j
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