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$ Z8 \; V% O" [3 p
$ _* W# W* ^2 X9 \, 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)。5 G# x1 K7 R% Z0 W
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？』
* O) e* H2 A1 ~% N3 U* @; d$ M/ K
; s" ?# a2 ~  d8 i, z1 k5 U注意: - P- S; t* I- J7 A8 [4 E
5 o) v7 u& M* m, ]  z! o, n2 I
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
' k6 x' r$ S6 c& E. g- K( w& R6 \$ x9 f" O$ }5 G% S
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
4 Y5 P# e$ @: |, ^# T7 d
$ y/ T4 B& \* }: G3 L8 P[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:: }" H- U) w( z5 C% }; P$ H! [+ I  H
相信e條題目都有吾少人玩...

% d' }- r2 n  q3 i6 o# X我以前畫左個chart去答,
+ j% W, V# x# F等我搵下仲在吾在
9 r3 v- P* p5 _, r6 s6 G6 C+ c2 Z1 Y2 N1 z* L* t, v7 N
當日用左37分鐘答１２粒波子，差７分鐘才合格。: D9 t8 W2 F7 ^
13.........9 P1 C' s5 y; s4 {

0 M* {* ^2 [6 @8 F+ ^# Z% G[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
+ T. }7 T5 W: D# h9 Q5 i
7 E5 o8 E. w$ I" G" A- q我以前畫左個chart去答,7 R7 V$ d$ p; ~& g
等我搵下...

3 d# [3 t( }+ c- q+ e& Z2 t
* v! W* i1 s9 W
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:
2 c! L( F4 |9 h( t6 o/ a唔識隱藏...已經諗到..

0 x  z8 w4 Y6 ~, p! V. n% ~
, l. T0 h9 `, h8 L
sor !!!....e加改左
7 O' _) P9 y* ?: N* Z! }. J
( J- O5 _3 Q7 O! e2. 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
$ E& t! b5 M7 Q7 \8 d) d1 e  b+ W, m% I- D$ 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:
& {# r1 W" j% o6 o相信e條題目都有吾少人玩...

4 Z% N$ n9 G: Q" M% \: W* r$ ^* v: H$ `5 m- c! H+ E0 S
PlayPlay, Let me know later who has the right answer and I will add points accordingly.. x& l% [1 Q1 c* `$ C9 q' o3 e
3 J* P1 M& J/ i/ ^) J/ `2 T
Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
6 V$ b2 w, r+ f  {) R) d7 Y6 M+ c' J/ J
) z$ b$ c2 _; }$ o8 I
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
- u! x7 o7 l5 m: L( v0 G0 p9 `7 K/ |5 x9 P
Thanks

' v9 `% Q( |4 P6 ~, `
" E) W6 P6 K; @- R不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
# e2 `' ?- {. C2 Y1-6 vs 7-12
0 }9 l0 t$ \5 h7 g: C" rif 1-6 = 7-12     13 is fake) z$ z, T+ B. Z- G8 l. u9 c; J

9 }6 H% o5 n7 v  w2 g  j2 vif not 7 x3 }& C7 E- h( x7 d

8 t6 |, q5 J6 I+ {Weight the 2 time
6 h" J' a. k3 k( I, q ) Q  i) `: L. i: k
Suppose 1-6> 7-12
6 Z8 W+ a1 \1 ~8 n8 b
6 t0 ]" ^( f4 R; F1-3 vs 4-6
, B: D7 p- W+ O  M- D
, W1 d( V4 `" o! h7 u  ^Then Weight the Third9 L8 [+ F& I4 y8 ^( }1 Y: w9 o! \! ^
3.
  s7 s; C4 v/ }- h0 L- ~
8 ^2 o' Y% H) d0 y% O) H% B6 S+ s9 vSuppose 4-6 > 1-3
9 K& r: X0 {: X1 G+ ]' X! h' A( j: O. m% Q' @3 S1 ~$ l
Just like the first Step4 b3 A7 g5 i2 q6 {& o
8 V5 d& ^7 m1 T; Y' w2 l* d
4 vs 5
7 [( _$ U4 ^- [( y; [) h* r
; N3 v& {+ o3 N8 Bif 4=5 6 is the fake one
9 R, g$ I5 j  Q) }2 q# e8 l8 y6 ^" j3 r5 y4 j
if 4>5  4 is the fake one
! q3 ^; G" S( g& {7 \/ n5 N$ b( ^" C, p0 N+ [8 w+ M' @
and so on......................

hello1997

分3組4隻波子秤
1 P7 U$ ?$ u3 d/ H2 ?
& b; A$ A5 d: {8 Q/ f& f. rGroup A: 1,2,3,47 ^' Y# C2 T: G/ @0 V
Group B: 5,6,7,8
2 Z+ v- C: a8 y3 x  j2 LGroup C: 9,10,11,12& c# i. h+ d. e' q' a
Group D: 135 \" O* f, S& ?

" d9 o4 A. n& `$ {) a( sRound 10 {" O4 O  m. Q
Group A vs Group B
8 i# Q' k- e6 ~8 v5 h如A and B一樣, 即較輕一粒在Group C or D
# d( d- P# e0 R' ?( O3 X
  N6 c+ b0 d+ p7 p2 y/ V% P$ {Round 2* ?2 \% N! y) O
再在Group C拆成:
0 B9 ~) d7 }+ ^" f6 W9 e% dGroup Ca: 9,10
: O0 `- v; j  H: }- |8 p% KGroup Cb: 11,12
# n4 N. r. y/ Y/ [& R$ l7 W8 R然後再秤, 如一樣, 即13為較輕一粒.
5 f  V& i6 ~9 G0 f2 I0 Q. [
6 d7 q- ^. I, N% Z2 u% u如不同, 即較輕一組有一粒較輕波子在其中,
* D3 Q" J5 |% G% u% Q( i0 J7 [! s要再秤, Round 3, 之後便知答案.
2 D, ^6 H" c. k* V+ {- T  S" a$ P: f, t8 C; f/ b
e.g. #1 假設10為較輕的一粒
; t! u2 j% \& E8 ]3 t; q& o4 RRound 12 N9 K( w5 p1 u. b4 z! y* k: k
1,2,3,4 vs 5,6,7,8 = equal
  B) E- @, u: g0 I% @+ M
3 X- F9 N6 f* i( v) v& Y" HRound 2
  ]& n+ @; K' u3 t' b  l5 I! T' m9,10 vs 11,12 = 9,10 < 11,12
' }/ m3 J+ ^: G8 }0 S* F
1 ?8 Z& A- F1 u7 c9 q. L6 \+ iRound 33 C4 p+ ?4 k2 E. t- `: i
9 vs 10 = 9 > 10
: g: W( ~! x$ q" J% @1 O/ C
4 h6 u! A9 H, uThe answer is 10.1 i8 a4 W/ ~$ ]$ q3 ^8 L; s2 Z
4 b9 D. u4 P9 p! l
e.g. #2 假設7為較輕的一粒
' R4 W$ Q9 \2 j6 WRound 1
1 P0 x- E8 K" j7 R( |, ]1 ^* q* d( f1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
" r# n6 @3 O  g6 H. ]1 e0 ?0 o2 a1 y! l- s
Round 2( v# R( r0 X' b& F: y" C+ [
5,6 vs 7,8 = 5,6 > 7,8  v1 r% s- B; C/ x
0 X% u! b# f- ^4 I. Z1 k+ r
Round 3
3 Q6 n: T& N9 c$ l" b7 vs 8 = 7 < 8
! G/ B4 m! H3 }& L
* E( A* Z* \3 O* g1 U! Y7 AThe answer is 7." B4 S: C! p/ C% i1 {4 b1 C

/ i# x$ b1 D& ~e.g. #3 假設13為較輕的一粒: m9 I$ e# m! G) V
Round 15 M2 c$ N1 O/ S/ l% L) z$ p
1,2,3,4 vs 5,6,7,8 = equal
2 d  w* y3 L1 H0 ~; ], d- r5 q! j' a7 U- K
Round 29 V4 ?1 N4 x0 ]2 d1 V0 u
9,10 vs 11,12 = equal/ s. s4 d2 B/ d; s' R5 _

8 r- j) x- e) X- k* r/ {' A7 ^No Round 3
, ?, S  m2 w2 x. e3 L; U
, o4 ]) T/ s# p1 j' {$ JThe answer is 13.
7 H' C1 Y: F& n' R& N( T$ a# h, x  \; m! d
唔知我答得正唔正確呢?! 2 K1 |/ O: a! i4 W5 a9 c" Z( c
9 z: ~" n$ Y& p: s" ?# d
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:7 P4 G9 S- P+ p" s6 c
1.; j3 I2 W: o+ F7 E5 ^5 p. l
1-6 vs 7-12
9 @' r9 c& A' u& J9 Pif 1-6 = 7-12     13 is fake! @% W* x$ H' P) K6 @/ R- O+ S' G

& g( ?1 U' j& w- B8 dif not ; M8 a2 S+ i% f3 n) ^
' Y1 E, b% `8 q3 R2 v! K, j3 O/ d
Weight the 2 time 6 e0 L$ P& V$ k$ r  |

) v" B9 h0 F) C- j" Q# tSuppose 1-6> 7-12! s2 k5 L1 w2 |$ B4 C& S
  \! c  M7 W2 i& ^. n
1-3 vs 4-6 $ ^) Y% f# ]: d+ d. s7 {* f+ S
* v( ^9 J+ g$ k6 [; U
Then Weight the Third) _" p0 i/ A. M% T
3.
4 \/ u: v8 ]: P  b- A" K: s. [- ~0 V+ j; A; z
Suppose 4-6 > 1-35 }0 S4 E) G, {9 H8 ]3 h! y
6 d  h) i5 E! e! q& u
Just like the first Step
  [3 }: g& H2 H% z! P8 e- ]8 _& g
7 c- y' U" a) m" z' }4 vs 5 ; A6 W0 T* Q- r, J9 H. n  B" D

, W8 L$ x' z: J0 B& R1 E6 Aif 4=5 6 is the fake one
9 H! b. T. D& `0 q: P1 T2 s
0 n2 J1 a' O0 E% Rif 4>5  4 is the fake one
0 Q# Z+ R0 j$ o" [and so on......................

4 e- }' u7 Q: ]9 [5 u

* l7 C8 B# s6 h8 R- y
& I( }/ P" H9 u- ?; R$ ]1 B6 H問題第二步
# _8 @4 }& c/ x7 J& z+ _4 k: j9 t/ v: i% U+ E5 k( I- a
Weight 1:  1-6> 7-12
; W; M* s9 T! J) ^7 f/ q0 W/ e0 x6 o. N9 y
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ _/ J& I( P, [8 J( T

3 C& S- B8 _% v你第三步点去搵 7-12 边一粒???, r1 M) D" X4 i6 _0 a5 e- j- q2 i

6 U4 \/ l9 d3 |( \========================================9 a4 z5 [1 h. z- b/ B" f& E# E  v

3 Y7 L) S9 r0 R/ u問題第三步
5 V; X, f- ?7 A* U" L+ Y- q' F( x& C4 Q( c# ~, }) V) ^1 v
Weight 1:  1-6> 7-123 [$ o0 B: j' w0 o( Q" _
" P) V1 u+ q  j+ }* S
Weight 2:  4-6 > 1-3 3 o9 q8 Q  m. m- s- P0 b1 }
' [+ x  X6 s0 f. M, n. P
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