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
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! ^2 k, ]/ @% M0 I% f『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  B( i+ G1 b) z3 ^7 f1 S: @
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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: S, l' F+ h* f2 i注意:
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3 L6 N3 m$ j7 ^# g4 B1. 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 T( {. i9 D2 {* T5 t
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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" z" v0 l$ {7 k1 a% b5 G: y

8 ^& Y* Z9 w9 s9 b% T[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
* O' n% T9 y* n2 P, k6 p相信e條題目都有吾少人玩...

, b2 w% p& I* v( {9 }4 m! h/ L我以前畫左個chart去答,
& y. W: J" s. z8 h等我搵下仲在吾在7 t$ ~+ ~9 n9 X
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ h6 v4 M, ^. A$ ^1 G13........., K3 e: N. q% i% G, F: }8 r

: k7 P  O( ^3 }[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 ~7 V3 A( M3 c

2 k# F5 t* x% s  c+ D% X我以前畫左個chart去答,; F& S8 T; d' k
等我搵下...

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/ j" e6 N6 C$ U, Y8 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:
/ F* w2 ~* T" k2 T; ?! C唔識隱藏...已經諗到..

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sor !!!....e加改左
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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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3 A6 i, Y2 q; r8 k- B' r: T3 ?0 c[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:- I! {- T  `) w) |0 r0 g
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.
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# q* Q+ h* z' H% X! ~Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:# X/ M2 L9 k, v1 g5 c
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.. _( q+ L4 X8 o6 |; V* C) ~
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Thanks

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# T- A; s+ e5 Q, {8 G# q$ A不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
/ Q! j+ F. r3 B' i% [1-6 vs 7-12
7 s$ O( H% K, W: c; mif 1-6 = 7-12     13 is fake& y+ N' ]- q3 @. r4 C$ o6 Q( c. t

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9 L* q3 E' a( c& aWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 . \6 a3 W) e" `+ w0 [- e. T

: f0 b: o0 A+ F9 lThen Weight the Third: G# J" V- e% S/ M  G
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Suppose 4-6 > 1-3
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Just like the first Step. k. r1 ?9 D% I  x9 o2 N  A
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4 vs 5 & i6 K& z( }2 e1 F# t0 ^

( U2 M: D/ e  ~if 4=5 6 is the fake one 3 a5 w! N+ r* @% G: Y' ]+ t
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if 4>5  4 is the fake one   B' ]. G5 u( n3 v" r. F
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
: T7 q* @3 r) o- MGroup B: 5,6,7,83 [: C( _1 N, Z
Group C: 9,10,11,12
1 d- j9 N+ n! {7 A  @1 fGroup D: 132 J# ~$ b0 i1 ~  a
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Round 10 Y' q% }" N; H
Group A vs Group B7 n$ p; R" \* L9 c4 V! `
如A and B一樣, 即較輕一粒在Group C or D
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+ m4 h5 t) U7 V  yRound 2
& ]$ Y. n' U( F( k0 L6 T% L再在Group C拆成:
  N4 Y# E: f, W4 D" D6 A) MGroup Ca: 9,10
& C6 L5 N* D/ T7 iGroup Cb: 11,12
- w# p" a9 a$ Z  ?  m然後再秤, 如一樣, 即13為較輕一粒.  R+ B, Z2 _: L- I, g) ~. G: i
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如不同, 即較輕一組有一粒較輕波子在其中,
9 E7 V' ^) a( D" m3 n% ?1 ^要再秤, Round 3, 之後便知答案.
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+ [  O/ L5 W( p& e: B5 ae.g. #1 假設10為較輕的一粒
# `, ~* E4 o8 dRound 1* {* O4 r7 D" _; Q1 K
1,2,3,4 vs 5,6,7,8 = equal
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Round 2* [4 L7 M* Q4 W1 C/ [5 C
9,10 vs 11,12 = 9,10 < 11,12
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" u$ r; {/ o# c8 B7 j2 V: S# _Round 3# Y0 N* t2 j. a# _1 Q' j2 _" i
9 vs 10 = 9 > 109 _9 T7 A# D6 {& |
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The answer is 10.( [* v& q7 h5 e1 Q1 ]

! s" _" t9 K# S' k" U4 v) Ee.g. #2 假設7為較輕的一粒! h# x3 k; c6 ~9 j0 p* K
Round 1# a- r8 t8 G$ {5 x# u
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
1 K$ l0 g: p9 I5 w! J0 `5,6 vs 7,8 = 5,6 > 7,8
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Round 3
% H8 l0 g) Z  X* }! {* [/ C7 vs 8 = 7 < 8
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The answer is 7.  n- }/ J% _6 @( v' u) S; B

- A2 {( w6 A8 E9 R; Ye.g. #3 假設13為較輕的一粒1 Z6 a7 {. ]4 ^  P  r
Round 16 p; c: i# n2 V! S# j9 U9 h6 j6 F: @
1,2,3,4 vs 5,6,7,8 = equal2 n9 ?& g; q  S! `; ^
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Round 21 b+ p& Y6 d( I7 [  h' M
9,10 vs 11,12 = equal: u9 t: Y0 B" X8 B, A: }
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No Round 3
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" |3 z3 S) D/ `' kThe answer is 13.; M3 Y; B; w* G0 E6 V1 Q# S. J
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唔知我答得正唔正確呢?!
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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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1-6 vs 7-12
+ q% y- N2 s: }& iif 1-6 = 7-12     13 is fake
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if not # @' P0 [( u2 L+ _, Y
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Weight the 2 time
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Suppose 1-6> 7-124 M' z0 a% Q/ N- B8 m8 _
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1-3 vs 4-6 ! f0 s+ x4 _" z* r9 j

8 U7 B, l/ z- JThen Weight the Third) Z, b: ]! W; \) T
3.
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/ n" {! P/ {+ y3 [/ bSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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" N" n( K0 L+ `7 d+ \- Kif 4=5 6 is the fake one
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1 H# ?9 }5 l" l% A" s9 C+ O; Sif 4>5  4 is the fake one . y3 H/ P0 G6 P8 j4 W4 V+ Q9 h
and so on......................

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問題第二步
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% K' Z" L- d1 sWeight 1:  1-6> 7-128 }5 v+ i1 y  P2 {+ f0 ^

# `- [- m) K5 j* lWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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========================================% N) k3 {- Z; i9 ?! F! M

- o; }- Q. ^) f4 U& L4 K: e' X問題第三步
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4 U! E4 V4 }! mWeight 1:  1-6> 7-12
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; W1 T; T/ @: C9 K  S$ t# r6 VWeight 2:  4-6 > 1-3 * O) J' y6 I: |: J
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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