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. V" f; b3 X2 S1 \+ j, ]) F, \" W

% p# A% D" |5 v4 m) I0 |  ]. w* ~『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)。
% H! P' T- Y3 L) c; D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？』
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5 J3 e. \4 n4 {1 D* u8 f注意: $ l7 h# K9 [6 e, X: ?/ [/ F, G
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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
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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
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:$ L# M; T( a1 F+ ]+ z. T$ J/ X' k( B3 {
相信e條題目都有吾少人玩...

. j- O8 \* e/ {- v  W我以前畫左個chart去答,
0 y8 J! h3 r6 Y; i等我搵下仲在吾在/ s) w. H6 J' |7 B1 B

1 h1 P+ Q/ ?# p2 V當日用左37分鐘答１２粒波子，差７分鐘才合格。
) F8 Q+ J2 x2 ^13.........9 y' ]* J3 X! N# x. k
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[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:: d7 i% ?  ?, }8 R

4 \( m, U5 D9 B8 q1 |/ \; [6 ]: z我以前畫左個chart去答,3 Q  R" X) S0 k! Q1 Y$ K  m
等我搵下...

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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:
" a8 o" c* y4 [) z+ a# E) [唔識隱藏...已經諗到..

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9 q: E7 f. `. b5 z. M* fsor !!!....e加改左, n4 A$ M% H! z* V- ?- h
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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
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
& j6 ~- O% }: B& G1 P相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.$ Y6 K& X6 D; G
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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( S/ u/ Q7 Q, K- _" |' p; ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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: `# [" d) G# \) q) y/ sThanks

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: ]1 i: G& m% U' K不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
' D- [: _( j- q0 e) K9 J, q  f! `6 d1-6 vs 7-12
' H% Y. \9 ?/ F6 [' b& sif 1-6 = 7-12     13 is fake  |3 j) H  l% U0 }

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Weight the 2 time 7 H5 P8 e& f) W% V, k0 W8 x8 ]
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Suppose 1-6> 7-12
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1-3 vs 4-6 5 u! G0 }  C9 ^5 F

' S+ l8 \" `! }Then Weight the Third
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Suppose 4-6 > 1-3+ l8 l" S7 k$ n! g: T, ^, N% d  i; R

8 S. V+ [+ T1 x! bJust like the first Step* F" _! A1 P  T1 |, @2 p  p$ k
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4 vs 5
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2 f1 l+ u4 t  k5 tif 4=5 6 is the fake one
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if 4>5  4 is the fake one # Z: M" m! _, A
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and so on......................

hello1997

分3組4隻波子秤- l* _2 E6 U& W+ o( u: V1 I/ K
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Group A: 1,2,3,4
1 R; ]8 q2 M, s9 A: E# S5 w5 x2 f% mGroup B: 5,6,7,8
# c/ C; L+ u, Z. ~% x4 k* u4 L7 AGroup C: 9,10,11,128 h7 b: D% _* m5 ~9 \6 {, Q
Group D: 13# h2 w  P1 B1 ]$ y6 G8 C, |' }
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Round 1
) u/ s# v% v9 ], \Group A vs Group B& v) q3 u# Q% R; s& L
如A and B一樣, 即較輕一粒在Group C or D
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Round 2. W( H2 K2 a$ B! C8 F( v; W
再在Group C拆成:
! {) O' L0 `8 N6 h* [8 a2 FGroup Ca: 9,10
! W! }% a3 b, lGroup Cb: 11,12- g0 Q; r2 {, J0 Y5 V, l
然後再秤, 如一樣, 即13為較輕一粒.5 L  c) D# R8 C6 X
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如不同, 即較輕一組有一粒較輕波子在其中, 0 A3 a0 ?2 m0 h; J7 ?
要再秤, Round 3, 之後便知答案." i! {, q  G1 W+ L4 c2 i

. v" ^# M+ X; ^e.g. #1 假設10為較輕的一粒/ \4 e( E$ c5 F. J
Round 1
  }1 X4 `4 D+ @+ x( O2 I1,2,3,4 vs 5,6,7,8 = equal
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) {, Y# `" i5 l+ D& k7 T/ z+ ?Round 26 ]. h! b, s9 y4 u$ f# G! y
9,10 vs 11,12 = 9,10 < 11,12
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Round 33 b& h3 Z) k# E* R+ j" b- }
9 vs 10 = 9 > 10
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3 V/ r  y1 v% a3 e+ d4 RThe answer is 10.
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e.g. #2 假設7為較輕的一粒3 x" W6 A+ `$ c* h
Round 13 \- S" M! W- _! O2 N/ p! Z
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 r7 P/ P9 c8 f* d) w0 C

! z5 a4 s, c% lRound 2
, X, ^+ h: p  E- |6 [5,6 vs 7,8 = 5,6 > 7,83 j/ @* n4 Q6 P1 O+ I

+ Q$ ?& Y. }$ C/ ?Round 33 m0 v. J; K) Q4 o: [; a6 S
7 vs 8 = 7 < 8
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The answer is 7." F6 [8 G( s& s4 ~
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e.g. #3 假設13為較輕的一粒9 \/ B' W" o, h3 D' d4 D% p
Round 1
$ k4 O; `7 W8 S- g1,2,3,4 vs 5,6,7,8 = equal
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) y. U) @! \( i2 K1 {Round 2
+ E. `& }# Z% o( {; J9,10 vs 11,12 = equal3 R' p8 ~  |# V1 I3 \& u4 \
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! 8 o' V$ ^7 w* G5 M4 U
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[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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) F& x( J. }6 ^( `1-6 vs 7-120 C9 L4 P! S' V9 r% c% x
if 1-6 = 7-12     13 is fake8 }2 `) G! y4 M7 ?2 A1 v! q

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" x( C& y1 U: p& kWeight the 2 time 9 X  Q% D  b( e  d
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Suppose 1-6> 7-121 f9 G* f+ {' H% `5 }9 g; {
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1-3 vs 4-6
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Then Weight the Third! A0 U' e, I% P, g
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; u' X3 j9 [' V/ m  z3 A7 cSuppose 4-6 > 1-3( l0 ?9 Z' ]$ W- ~' ^
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Just like the first Step* E1 N/ a3 L/ l6 s3 T* J) V7 ~

+ y" ?5 T) k, X4 vs 5
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2 j0 c" }; A& O* F9 \  A8 iif 4=5 6 is the fake one
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if 4>5  4 is the fake one # G" I4 E; q: ^
and so on......................

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問題第二步1 H% y8 N1 I& B! L" z. }" X- i

2 s8 K" a5 ]. p+ K% o3 S" ^  c  y" c) JWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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% V: R" a5 Z+ Z. w你第三步点去搵 7-12 边一粒???! j8 x6 n$ T$ b: a; a

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2 @( Y' n' F/ x. k問題第三步
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Weight 1:  1-6> 7-12. B6 ]. \; f2 j$ y0 |* {
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Weight 2:  4-6 > 1-3 $ j6 x9 \0 ^5 k( D% z. |
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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