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7 _1 q0 \  ?; i

2 ~2 e+ i. ]0 l2 ~『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)。, C2 U, q6 z" p$ c7 q4 {6 }
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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注意:   G1 Z% ~% W9 Y! E
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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' P! W/ w' W# A3 [3 S

3 c# d" W- j0 z2. 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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4 p9 ]0 `  C4 k/ ]* @) M[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 e; b5 e) r3 N; F相信e條題目都有吾少人玩...

5 [& n+ y2 L. a  O: F: S我以前畫左個chart去答,/ H4 X1 O; r; ~
等我搵下仲在吾在( @6 W/ H' |! s. G9 C* u

4 I$ W! x9 L% ]. b% W當日用左37分鐘答１２粒波子，差７分鐘才合格。
6 q$ C1 y5 o) E* b- T13.........
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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:2 |( {8 q  P; G. _5 n5 L2 u
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我以前畫左個chart去答,8 p+ X  G+ H1 z, C" h
等我搵下...

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5 R4 @+ `" K/ \7 o# t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:( }! }# ?( t0 h2 Y; [% G3 k
唔識隱藏...已經諗到..

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sor !!!....e加改左" v' D. @' H& Z+ E0 H  [

8 P% t  m% [! C& ?! s7 R2. 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:: g* n4 ?; Y" @" D, n
相信e條題目都有吾少人玩...

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9 z" d: ?& W% l6 w: P" fPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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4 B' z( d" h+ ?- B! @- T4 AThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:( J- @2 m3 T+ U* m8 f% ?" w8 T
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.# G6 o) J2 x% p  q* N$ Q3 n

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/ E; ]+ h, e( `1 v; c不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
# M* ]7 `, a) E. P3 S: ]1 c( k9 P1-6 vs 7-12
; d* f/ `8 _+ b' fif 1-6 = 7-12     13 is fake5 c" ?8 b5 l0 `. S

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* Q2 Y! k# Y- r- KWeight the 2 time & K+ f; G7 O4 e, {, E7 g

, i. `$ Q: R' `, m  @8 RSuppose 1-6> 7-121 \; P$ l  r% ?. d, K+ e

' |+ t/ A9 t5 L; F1 j1-3 vs 4-6 , Y* S9 v. N* L1 b

, _/ y% f2 X' f( y- y" zThen Weight the Third2 U, [. x3 D+ p* m
3.
. _; B$ n) L3 D) N8 W5 D9 z6 Q& @5 }6 R) k( L
Suppose 4-6 > 1-3
  H$ a3 g+ W6 J
7 r* T0 i8 D3 U% u# l, pJust like the first Step
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( `& _7 Z: m( g1 Z0 `0 ]: c4 vs 5 : B& y1 Y) Y4 }$ L7 W& G
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if 4=5 6 is the fake one " g1 G' t  ~) D* j" R! \' o' N
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if 4>5  4 is the fake one : q0 v% K, o! G) a. {$ Y- q

& F( c, s- D: Z% Kand so on......................

hello1997

分3組4隻波子秤
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5 e/ z' B( d2 Y; Z6 I* ]Group A: 1,2,3,4* o! C1 D' `: S
Group B: 5,6,7,8: l. Q4 M7 i1 I' V
Group C: 9,10,11,12
) [5 b/ p, u9 n; KGroup D: 13
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Round 1* b& I3 W% l  x* e: I3 x
Group A vs Group B# |2 R5 W6 P: Y
如A and B一樣, 即較輕一粒在Group C or D
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( Z' Y# W! r$ b- }4 c7 BRound 21 J6 p$ u& c- v- e0 l! O
再在Group C拆成:
  p6 f0 E# y$ C& eGroup Ca: 9,10; e  z8 n, C* p) D
Group Cb: 11,12
* i# l: G! x  K/ C然後再秤, 如一樣, 即13為較輕一粒.0 M' O' u- o* ^. z9 t. F' b
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如不同, 即較輕一組有一粒較輕波子在其中, 4 w+ k( x! c; {% J
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
/ V1 a- X5 S# }% y1 k2 t- f4 |Round 1/ G' m' U. G$ ~, l. ?1 @
1,2,3,4 vs 5,6,7,8 = equal
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' K2 {1 l- R1 R' b! CRound 2+ J' q1 J- ^* V4 K) P+ T1 j
9,10 vs 11,12 = 9,10 < 11,12- j+ c( V  m( Z6 e

: V% x& v1 ~, b. z- r* y$ xRound 3
* J! b* z% O+ N! f; S2 S+ m; y% e9 vs 10 = 9 > 10
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3 @% x3 F: q* `6 OThe answer is 10.
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e.g. #2 假設7為較輕的一粒
  R% W, B. i# ^6 oRound 11 ]# T8 m: [* J
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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! L3 R& r  n- v7 }% g3 Q7 w" BRound 2
, L( g# s, g) ~/ _; I4 q+ p5,6 vs 7,8 = 5,6 > 7,8& ^9 Y. r2 \' [5 ^, Z
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Round 3' {0 c  `- s) a; }+ C  V
7 vs 8 = 7 < 8/ l; f% Z9 W! G
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The answer is 7.$ v/ J4 \! `3 R# g2 d  P
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e.g. #3 假設13為較輕的一粒4 K2 Z1 D$ R$ g" u, l  [
Round 1( d5 s- D, R8 P2 ~5 V; X
1,2,3,4 vs 5,6,7,8 = equal, U4 U; k/ ^' k0 p, N( [! v5 s

2 i1 K3 \% W4 CRound 2
* |+ p0 m4 G+ w8 V& b- k9 q- ]" S9,10 vs 11,12 = equal, F) r7 \: S$ K2 B7 f' U+ e5 @

/ O8 O3 ]0 d9 ]% ONo Round 3
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6 F& I" M+ A$ B# B9 p+ j% O$ EThe answer is 13.
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- m5 f9 [" }# b$ U3 y  A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:% W; h0 `# F4 d- j
1.
' \% @, N; y/ f1-6 vs 7-120 o9 |5 y) W) o& j
if 1-6 = 7-12     13 is fake
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6 D4 V' [+ j7 T/ d) @5 Nif not
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7 W% R4 z. ^9 X- `# wWeight the 2 time 0 k7 x; A1 f0 g( Y' m7 j. S

: c" r! [+ a/ @" l% A; x( R" ~5 PSuppose 1-6> 7-12
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! C# N. k, I6 ^) w5 Z$ _1-3 vs 4-6 - e! q: F" L/ @1 L" r$ B! c7 W6 H

  s; }6 ?/ d3 I& N: l0 C( W7 |Then Weight the Third% I; x' f4 c( w
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Suppose 4-6 > 1-39 r* B- B' [6 r* B! O0 G5 \

+ b! S( Y: G% X1 r* d( p* n1 \Just like the first Step8 N3 W7 ^+ a9 K* b; `* C7 g/ ~) ~

5 Z6 d# M- U! T% E4 vs 5
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if 4=5 6 is the fake one % ^. n2 @0 p# _
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if 4>5  4 is the fake one 5 u& T) Y2 |' \  \
and so on......................

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( Z7 l$ O5 P) j" }+ `1 r2 w. [問題第二步
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  _/ t  s) K4 W6 X8 F. ~! O4 ?0 KWeight 1:  1-6> 7-12# w) A* h; Z  e& c: S; ?. ^$ N, m

' E+ b. l6 U4 bWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6. E0 D* j8 O- s* u6 w) y' \
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你第三步点去搵 7-12 边一粒???* K* U# U* F3 }$ E9 y0 V$ a
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問題第三步; z4 y' _6 H) b: Q- E9 R# S
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Weight 1:  1-6> 7-12
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. t! S. r# i; h+ Y- fWeight 2:  4-6 > 1-3
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# c1 q0 V  ~. k* e( [  J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