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$ P; F$ O7 J# ~' j  a9 Z- Z( H
( ?0 U) R" Q8 T* S: s7 B『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)。
- Y; @  q- e. ~& m% _6 q0 o2 |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？』
% G) O; ]! y0 c6 `" K5 L8 [
& J3 o+ B- E5 w/ V) j注意:
7 M- n4 k1 m. v8 x# a' \
8 [0 P3 P) \7 {: k4 @. j9 P! ?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
" T( n7 ~6 p, a' M# s7 O$ B  g3 L
6 |9 e+ C7 f  J  r+ i9 i( o: P2. 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
" x3 q6 D# v. [1 V1 \& |8 w% X- }: m/ z; T3 _% B3 W
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:) L; ]" n+ [; N# v& Q5 r
相信e條題目都有吾少人玩...

4 _+ x7 x. n; q. q, U' Z我以前畫左個chart去答,, d6 x# O& K% ]8 D3 ?9 V
等我搵下仲在吾在' `) c$ D3 N4 e: d0 C9 Z" L

( l  Q! ~8 i7 l5 ~當日用左37分鐘答１２粒波子，差７分鐘才合格。
- L7 J& g( l( B  w13.........
5 E. T7 i3 u* E, ~2 f0 i$ w! M" C: b; |) z# D5 @- k8 K: d2 D
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
. I% w: ^4 O9 o
/ g7 k1 T: [6 y  W5 t4 H* N" z我以前畫左個chart去答,& P8 y( V% V0 u+ g: y! g9 V( X
等我搵下...

8 f/ A3 n! |3 s# s& V( l: [% l0 w/ f- ]# S
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:
3 |+ I' j1 V1 X+ r+ `唔識隱藏...已經諗到..

0 _: P& l! G! C* H

+ V0 J4 U3 U4 V2 Asor !!!....e加改左; u! e5 \; r2 m8 p

, ~/ E& g/ V2 J6 I7 D+ v2 @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
& |9 e  M: d; V2 p' b
' C, q% ~- P3 |  T; Y3 [[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:* K# O5 A1 S& h* w
相信e條題目都有吾少人玩...

8 x/ O( K) m) f6 W; j1 ^/ L) \+ _2 R. t% ?+ u
PlayPlay, Let me know later who has the right answer and I will add points accordingly.  x+ A* o) P' K/ ^
: _# C. P( h! ]
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
. t5 Z$ x* @7 {8 B1 z& l9 H0 s+ W' Z3 I8 K8 h5 o5 ?- f/ I# C

. Y; W4 V' m6 F8 oPlayPlay, Let me know later who has the right answer and I will add points accordingly.8 k; ^' s! P+ v0 e

- r# V2 o: e  U$ r, A2 }Thanks

( \! I# {8 e, g. g- G  s1 a; B5 p2 z' u" [
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.8 ?2 a* W/ D5 K" x4 {
1-6 vs 7-12
9 A: X: h5 Q0 b9 Tif 1-6 = 7-12     13 is fake& b0 M7 V! p$ J- D$ Q

0 j+ q. `) C  C7 p! hif not # [, n7 p4 \7 C) {% Z
  v2 W0 ]/ H3 W! w8 A6 `4 R
Weight the 2 time ' N! I4 b* q) y: D

. V' Q  f$ x" [1 X. n$ {7 {  @Suppose 1-6> 7-12
' Z+ A" X+ b) A& y& H) U: e' J0 s
5 q6 B9 z9 j! y+ f9 ^6 E3 w1-3 vs 4-6
5 f! k, F( C' z3 L7 p' A5 s* L+ ^/ A2 }/ u6 t9 o
Then Weight the Third
$ q  J2 z$ m( h0 v; ^) k3.
2 R7 q3 T  e/ M! r4 e' t8 n- b
, ?9 J9 X8 ^7 A& hSuppose 4-6 > 1-3
* o  n; ^& V+ d& r1 |* N
* l  k7 k  C# F/ G: B& EJust like the first Step
: A' o0 T( H; c0 E# [5 |4 o& d' g- T
4 vs 5
- }; z! e' b! r
9 b. E. Q/ O% z3 Mif 4=5 6 is the fake one % J( Y0 Y0 I* [+ _% D7 o

; S) g# T  K7 Y6 Zif 4>5  4 is the fake one ) i& q7 ?* j! C' H" \, x/ v2 q2 K9 F

6 O" K# W& ~0 m& a" Z4 A  G/ \4 J! aand so on......................

hello1997

分3組4隻波子秤
& W( a9 m2 u7 D+ q* h% d0 E
* m* E# q2 V; i% V* L$ R' v6 J. g) VGroup A: 1,2,3,4' u6 a" ~/ f' m. f; r: [7 F# K
Group B: 5,6,7,8
0 j- m: `" k! O# ~" HGroup C: 9,10,11,12- _* U- ]: G0 m  U
Group D: 13. N2 ]; [1 J' b- a* Y7 ~# I
4 q) u1 \# X% w
Round 12 G( v4 m7 E: q. o6 ]
Group A vs Group B( f5 j9 g! l( ~7 j
如A and B一樣, 即較輕一粒在Group C or D
- T$ v( b" q; T  v, ]5 _* M
+ W8 N6 |( ~6 |7 F0 cRound 2# m4 d& J% l' h0 {
再在Group C拆成:: S+ ~* g6 Y5 y. B- _
Group Ca: 9,100 x( y( Y  C% @$ Q7 L
Group Cb: 11,12
" \5 `( I/ V4 V$ q0 J然後再秤, 如一樣, 即13為較輕一粒.
/ B' d" F  l0 r# m' M
& ^1 \% ~/ R0 s: |1 U) _- M' ?/ x如不同, 即較輕一組有一粒較輕波子在其中, + t/ [! @+ q- n
要再秤, Round 3, 之後便知答案.
7 c/ S& i6 A0 u, f) j% M- P& ~7 v
e.g. #1 假設10為較輕的一粒3 w7 o& z& f2 U; _1 ]# u
Round 1" d7 F; ]3 i3 S  U' o' O; k8 e
1,2,3,4 vs 5,6,7,8 = equal* w& G& k5 P  i0 c& i' ]9 T- L! R
* Q6 j# k1 z; a. ^7 j* x& Q
Round 2- n1 J2 t  A6 Y
9,10 vs 11,12 = 9,10 < 11,128 ?3 X% ^, O) M7 T# g% w

  j4 M) V+ N7 P. G8 l0 \! C9 N: SRound 38 I# [; a% b, d
9 vs 10 = 9 > 10* B* ~* r( X; h1 v. l% [
( v- _, i9 q9 Y7 U+ k" A) f
The answer is 10.. ?: }) q9 j8 [% \0 z

5 J! Y+ E; D  R4 J0 a2 ye.g. #2 假設7為較輕的一粒1 m0 @- e4 e0 t% K/ @; W1 i/ n2 u2 P
Round 1& z+ r" y8 R+ a3 ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
9 y) i5 U! J1 m' m) J" s) C+ p+ U( L- W5 D+ m8 w/ Z
Round 2
+ [( R* {& e4 S$ `( N% u4 G5,6 vs 7,8 = 5,6 > 7,8
; s. B1 v5 W! m  A8 d- s; E( }( o2 @5 d% c
Round 37 _% Q) J: ^- C: M5 L& y
7 vs 8 = 7 < 8
; ^1 m9 [3 o, y9 ?' G" E$ Y; o7 P3 z
The answer is 7.
" u6 Q2 |) Z; v$ s7 f
* H1 p; H- _: a3 K0 U0 s8 l5 f9 ce.g. #3 假設13為較輕的一粒
3 _4 V: J% V/ M3 X/ J- P& JRound 1- d0 |) n/ k$ M6 b; ^7 A1 y* S
1,2,3,4 vs 5,6,7,8 = equal
/ k; Z5 N8 A/ [' ?
: ], W# r+ ]/ k' t4 E5 jRound 2. Z3 o- \3 H2 a2 T1 B) N
9,10 vs 11,12 = equal
+ x! e$ e% j6 `; E
4 ~- C4 ?; Y8 V5 u) |No Round 33 o) b6 }5 s- e. J7 ~
- k1 o1 c" i& i% m
The answer is 13.' ^8 |3 s) j3 K
2 L: _2 [2 [) p4 {! {; L, o' Q
唔知我答得正唔正確呢?! : A& Q& O8 B: H" ?$ L7 v  F
7 ?" [$ p  g) g3 C( N
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:& P" J$ c5 `% S" ~& E. h; r! [
1.9 o4 p" ^9 j* u! W8 v0 `. J- C
1-6 vs 7-12/ i2 U+ f- W5 Z3 E/ F" c! M& G' f
if 1-6 = 7-12     13 is fake
2 f. Q; F% a  _6 m
2 l3 B/ ^4 j+ f( r8 _: qif not
2 F7 g" ]' l0 P
1 w9 k; E2 _3 h8 wWeight the 2 time & z  d1 [2 W! @  |. w# Q% j2 }' t
8 ]: w2 u4 ^" h. [
Suppose 1-6> 7-12
% l, E7 S  j$ c! q6 x6 I
4 ^# }# m1 }; N# O6 t1-3 vs 4-6 6 e: ^& l. b  j8 [. b0 v

1 d- @' s* e  M$ RThen Weight the Third+ d+ @( B7 }; C
3.: [& `: y) ~% U1 y: ?/ k
: R  d- [4 o' ^& j: e
Suppose 4-6 > 1-3$ B; t4 \* @0 F
, d' V3 G( B2 }9 [/ E1 [; C
Just like the first Step
. q2 @7 _' \- k! c5 V
5 H7 \1 h; c' g4 ?& h5 N8 |4 vs 5 7 J( s/ |9 t0 S, g- H9 x  o
0 {7 Z5 |3 n- B" u
if 4=5 6 is the fake one
% R! {/ ?2 Y& q* ], \8 _0 K+ o
4 H0 _: {$ Q4 }0 _, Q! F/ h4 b, {if 4>5  4 is the fake one ; x6 g6 {% D" h" g, P1 o9 l
and so on......................

$ w* p! g: b0 ]  a  F7 w$ H& T$ d- y" A
) E) B/ M* A/ c$ }7 |/ p/ H0 {9 E6 h4 s5 b" l" M
問題第二步
! `- x* k$ C' F+ g4 n: m& E  a; K. B$ q" r4 _
Weight 1:  1-6> 7-12
& T/ j6 c! D; q, V% Y- F% Z8 ?2 ~2 d) @" W! t
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
; \: g% I0 m7 ~' }
/ s. t! @% }9 t$ R你第三步点去搵 7-12 边一粒???
- f& X" f8 a! P1 ~0 C/ S  Z
" l* Z$ A: r9 |& h. c========================================
8 o, H7 b* Z$ l5 {# H7 h* W* r) E; C
9 W3 Q6 D2 p2 z1 J問題第三步
, J/ g7 Z3 O# y! }& o0 e
. W; I( c; G2 q' `& f0 N- KWeight 1:  1-6> 7-12
. i; `( P8 f$ @' ?8 a# h( {3 S, N5 s) f
Weight 2:  4-6 > 1-3 . S2 d# k9 e9 A1 G+ R% X0 J
9 j9 x0 {3 A; k) O$ O
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