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- A: N2 Q, Q

3 ?" G9 S7 B4 m+ L2 ^4 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)。
& M9 [: q, x: i7 g' T6 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？』) w4 \  v: E  a% _, R

, ^, N9 V5 i7 c  N( s6 }; R注意: / Y: G$ \" s, k; X
4 I! P2 E, E' V# k
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, \( i$ I, D

' F/ b9 Q% q' E5 B( M9 f2. 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
7 n5 E6 D: J- x$ B4 e; y6 F. f( U) r* I% l
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:' e; @. m; K& W- u' b' h* E
相信e條題目都有吾少人玩...

+ O% g4 y+ }! h" e9 K7 q
我以前畫左個chart去答,& }8 b3 s3 @3 o. @/ X
等我搵下仲在吾在
' |* w7 K! X8 j: J  G4 w  w$ ]1 g8 U( X. x7 N1 ~6 u
當日用左37分鐘答１２粒波子，差７分鐘才合格。& M2 [  B+ h% N
13.........' k  `( C; }3 Y( `( Z9 K

5 t/ Z6 g6 [9 @; 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:
. }2 \7 l7 b: b) ]% @: p8 T7 f" l$ Y& l, y# O* D
我以前畫左個chart去答,
5 l' z: C; |& Z9 h0 Q" L1 |等我搵下...

4 R4 _4 j& N# z, O: Q4 @
) O6 k6 q  @9 v6 n9 a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:& u* j2 m& J$ a
唔識隱藏...已經諗到..

3 o' `( q# _* N# H6 ]) i5 E& n2 V* `! q: M/ m9 k6 v% e
sor !!!....e加改左
6 q. ~% v, l, H
( ~' Q3 ]6 E: W. z4 D; \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
+ b' ]4 ^% B- S- p
: ^3 ?0 \3 _# j+ o9 |+ e[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:; s! |3 j* l' R  c/ m& G# R
相信e條題目都有吾少人玩...

4 F4 \! i+ |# E7 U5 I
* ]! p8 U. \  OPlayPlay, Let me know later who has the right answer and I will add points accordingly.
" t/ H: ^2 G- z# {9 O- |
1 _+ ^5 @+ U5 y6 Y  f+ CThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% t3 `, ^7 D4 Y

6 k/ C7 q! T% Z$ n
0 q. K' p* r7 w$ n7 cPlayPlay, Let me know later who has the right answer and I will add points accordingly.
$ S- ^' e0 C. s0 h6 I8 E( h3 z, @- J; c0 K+ J
Thanks

1 T" p" B0 y* ^* H$ G0 Q# n5 J
& ]& G8 \9 }, }3 P. [  \$ P& C
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.% V( k) ], [/ H3 F
1-6 vs 7-129 `6 y2 S$ v4 s, j7 C
if 1-6 = 7-12     13 is fake
3 K; e- b/ z# b4 L% X5 P3 }1 `
6 B7 i% @% x' l  i" j0 Eif not
. Y. P; x, J( R0 N, |  R, P$ e$ Q7 H8 V: b. n! @" f# C
Weight the 2 time
/ a2 \2 t; J# }. z( s! J- `; M
9 h; b# k* S0 w: `! \Suppose 1-6> 7-12
9 A* H& t( h- U( d3 C; b! v* U* b1 R1 B, J' r, U# l1 X7 S
1-3 vs 4-6 7 _' y! c4 ?& T0 H+ w! @( A& t

6 P* b3 n% j8 k, L% D6 }( Y7 b6 M+ ZThen Weight the Third" F, M, ~9 y: n* R
3.
# k" f' r( o8 s- n, |4 N) j) D3 l& r  s% Z  j7 ?7 J8 g( v4 z
Suppose 4-6 > 1-3+ U* X; g" t* R% H+ `

& C/ I* u& H% [/ f- {3 G# l. FJust like the first Step& |  x" q  o) `1 W! o. }. y5 d
/ d% O7 h+ J, d; c& n
4 vs 5 9 g( t" R1 H+ a; Z6 I7 Z
9 m4 W8 g$ m2 L/ n) p# V. w5 n
if 4=5 6 is the fake one $ }+ I0 p3 q2 o' w" Q; R

1 \  `) x& \7 Cif 4>5  4 is the fake one
# o( r5 J: h/ Q3 R& y  r  M9 \
' B* t; Q" j, _and so on......................

hello1997

分3組4隻波子秤
% I. t% U" [2 o  B* a% H7 {) h. ~: X' A8 }7 z: ~0 G; ?8 b$ F
Group A: 1,2,3,4
% ]4 j+ z+ J, @" m' ^9 P7 l7 A6 uGroup B: 5,6,7,8
9 T0 y# q8 m% }" a$ y9 JGroup C: 9,10,11,12* i1 X6 K7 a, c2 Z4 u& G1 p$ J
Group D: 13
9 B. X2 {1 g) V1 X& W1 z* z& s- o5 f
Round 1
$ Q2 H2 a) D+ d) w+ n1 C, ]3 iGroup A vs Group B
* C% L3 `( x4 q) \0 b) J3 k6 _  [* u如A and B一樣, 即較輕一粒在Group C or D3 }* b2 y+ q% g& m7 h

9 b% w6 n1 W& ]2 FRound 2
# U( V( O, @: \- S( Y4 x再在Group C拆成:
. _  x$ |  S* d3 ]; G2 iGroup Ca: 9,10
+ a, Z8 [' Z; B: Y' U# e- PGroup Cb: 11,12- F" X3 F' n* Z0 L* c" M* {
然後再秤, 如一樣, 即13為較輕一粒.
- ]; }9 M. a0 f% K% E* {7 v
- D; D  C9 V7 Q如不同, 即較輕一組有一粒較輕波子在其中,
% P+ Y4 y6 C! h# I% Z/ B2 \( L要再秤, Round 3, 之後便知答案.
5 [" y; S$ m( E. X; n5 N8 }' a# n% K( x/ v! i, ]. g: h0 U
e.g. #1 假設10為較輕的一粒
2 K. ~$ S6 F/ r4 _2 g6 J6 nRound 1
* z; \$ X! ?* S3 ?1,2,3,4 vs 5,6,7,8 = equal6 x+ M, V* u& H% w( F0 U
5 H: @/ w5 X7 s2 p2 q' X
Round 2: T6 t* a2 Y- T
9,10 vs 11,12 = 9,10 < 11,12
2 R1 W7 {' n! k" F0 D! c7 K  R3 q( f% d$ J" r# j- G) w# \6 ]
Round 38 ]' v$ ?; z" x) J+ v
9 vs 10 = 9 > 10& P" o3 K$ T9 |, L9 V+ v
( X8 x  U2 K8 z' @4 O
The answer is 10.
& G8 e- x) i( b' A, f8 V4 \1 u/ B
# @& {3 e! X; F" q! s* X/ Y/ le.g. #2 假設7為較輕的一粒0 L& ^5 l! s) f3 A. r
Round 1/ @% z+ Y$ B; Z2 `6 V) ]/ p% c
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 r/ n5 a  p+ t# x2 Q
6 v, y6 s2 H3 O
Round 2- G4 }, @6 n( J( A0 X
5,6 vs 7,8 = 5,6 > 7,8; E8 q0 h! H+ L0 A* _

! \& w+ D5 H$ x1 {Round 3
  s& E: ~, `) C- |. e$ m. H7 vs 8 = 7 < 8
( j  _* R/ f4 t* ~- ?% E
9 J$ k* H; e- {% _/ E$ FThe answer is 7.
+ J* c. O" M- K6 q- H% C4 ?0 H% m
4 C' D9 W; [4 L" z& R) m4 Pe.g. #3 假設13為較輕的一粒
. P* e! N( h! ]9 a5 M  \2 ARound 1, e; D+ O6 W: C5 c
1,2,3,4 vs 5,6,7,8 = equal/ u9 }8 x" @. P- p( h" b

& W+ @. ^/ s/ R5 y5 rRound 2
# S- X6 v* q6 d, j3 y$ x1 p0 E9,10 vs 11,12 = equal
6 R% w; Y7 O% t% t5 c
2 K* q0 J4 N+ o5 ~No Round 3; u$ k( B  s& D# B( p6 Q& A" t
$ A% j: m6 ~8 D' K1 w
The answer is 13.
* O) E+ x  [, W5 j& l7 ^. {; x- r8 f, A3 P0 l, C
唔知我答得正唔正確呢?! % ?/ j2 ~  u, y8 q4 t! W
6 D5 O3 I' X: S1 y# E' D2 Q5 b2 @( T
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
1 z3 k( b' O/ I# i% b1.1 e! Q8 G1 n! O+ ?5 C) y+ K$ c
1-6 vs 7-12& r, ]6 R. F) u6 g* m
if 1-6 = 7-12     13 is fake9 f. I# r; E* y! D* [0 ~' x
7 M5 \& }( b# R8 B4 j3 u! v
if not
8 ~# ^& ]% P, I, }  v9 Y1 a2 h' _* U) ~9 K: q) x2 E& s/ u9 x
Weight the 2 time 3 g$ k. N- Q2 A0 C% O
/ Z- `' m8 `8 m  {
Suppose 1-6> 7-12/ ]. w! S% G8 n. T
: V; y! B: _8 [* h
1-3 vs 4-6 & R# `4 ~$ N2 M( N4 B

5 _+ y; A- @6 W) }- ^( MThen Weight the Third
. [( V$ I) W, z3.
2 u: K, ^; ]- V6 @& o: i' F2 g
1 B! K- w6 G5 Z2 f" }Suppose 4-6 > 1-3  I  Q9 _& Y, a3 w2 L
4 U# `- @; F0 `! J/ c
Just like the first Step& u- T* A2 W' L
0 \4 D2 d7 o0 [1 [
4 vs 5 + f8 l& n+ j+ r9 R
. q2 ~+ X9 }) ]# k5 s5 ]
if 4=5 6 is the fake one ! L& w/ B3 }$ e
: Y1 V# R, u2 j! E( i0 I
if 4>5  4 is the fake one
- S- n/ i( \7 D, xand so on......................

. n8 h5 |3 \+ T0 I! X. a$ Y* @2 `5 H  |9 @' f

* r, F' Z2 S; N# s* `問題第二步
9 N3 u3 D8 Q1 N5 |8 \
6 r- P, F8 e8 p2 S' j, M6 tWeight 1:  1-6> 7-12
' |1 Z- N. U7 g4 H1 D9 N/ L; S& ~8 V' ~
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
1 m. \$ P) R  Q; h& m9 i7 G! c/ A  J  ]; n5 z" v( P" C5 J5 S
你第三步点去搵 7-12 边一粒???! R5 {4 x1 B( i  s
& K6 J+ d! X) q- p" \" q
========================================1 n6 d4 B6 u0 q6 o

5 t1 g# e# K4 o7 i問題第三步
3 c' U! o# F6 k1 \# f% G2 {  p+ S3 \
* n: w+ z' e" x) hWeight 1:  1-6> 7-127 |: B' }3 H- f3 \

' u7 L! k& O/ k2 MWeight 2:  4-6 > 1-3
8 G1 T: Y1 c& P% O/ Z$ `8 U. g7 k: F; ~1 B6 X8 u6 X
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