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6 C4 t1 q1 R) c" F/ x

- _8 I1 K+ D: E- `3 ]4 ^1 I3 O『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)。
4 i  l1 G5 Z- }) z4 r8 M6 p  z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？』  ^5 q# a5 y+ O" l1 D
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注意: 1 v) j: [2 ?, e- D$ I
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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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5 W! t& m/ M, L" W2. 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3 D4 ]7 T, v8 b
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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:+ R2 N- `: D" {- P; }
相信e條題目都有吾少人玩...

$ [* g/ t/ @( o/ K9 g  ?我以前畫左個chart去答,
! e' ^5 ?& k0 x" N- [. j等我搵下仲在吾在
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3 ~4 u' q+ A- J+ R/ }當日用左37分鐘答１２粒波子，差７分鐘才合格。5 Z" U/ w" @' W( }/ E. H( z
13.........
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% b' A5 B. i' F2 r8 i  r8 _[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:& ]* P0 N* w' ]4 r8 S0 m9 E4 A
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我以前畫左個chart去答,( {7 G- D. O+ t- c
等我搵下...

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9 I; }+ D, c/ }+ ?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:
% V4 E! z4 E2 O唔識隱藏...已經諗到..

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sor !!!....e加改左/ G1 v2 ?! T8 J# O9 ?

1 e, d4 i) o0 ~  j/ f2 n2. 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* [) R  X/ v" F2 ^) J9 D% l( ?1 g

' m' U) M* a5 Q' u( R+ w[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:6 U' H5 T3 }+ Y) 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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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- }+ k( E7 [: v6 _5 r) ZPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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4 c2 U" x4 |1 M8 I. M4 @0 H不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
& V% P. Z6 {4 b! k) ?% f1-6 vs 7-120 T4 w1 |7 e+ U$ {2 k$ q9 Q: o3 I8 s
if 1-6 = 7-12     13 is fake$ |4 c* e1 d# X1 F  z/ o1 _3 o
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if not
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Weight the 2 time
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. S3 x2 ?, h/ o/ V8 t8 MSuppose 1-6> 7-12# Y* l$ S, @: ?
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1-3 vs 4-6 ) U, {  R) D& O

5 O" l3 {+ {8 O5 j. u6 AThen Weight the Third9 U& \# c7 ]% n. F4 [( D2 C
3.! i$ h! t, B- }6 q7 Y6 `9 e. x

6 Z' N; G2 e* t1 S5 c7 b( y& v+ bSuppose 4-6 > 1-32 r( I: T; o9 V6 w
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Just like the first Step! S2 S6 N( N9 a" o& C3 a) O% P; J
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4 vs 5
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if 4=5 6 is the fake one 2 a- C4 P3 @; I
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if 4>5  4 is the fake one : x2 e- t/ w/ k; i5 A
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and so on......................

hello1997

分3組4隻波子秤) _- \* |' E2 k/ v

( l  |( F' R0 ]* o; ]Group A: 1,2,3,4
  _0 F% M: |6 f5 S4 D) wGroup B: 5,6,7,8- H# A1 k& ^9 y4 o: G
Group C: 9,10,11,12( `! n# ?3 d; `6 O. T
Group D: 13
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- g7 I! J2 j/ d4 l4 a, @. aRound 1
7 _9 Z8 X3 }2 u3 U1 ~* JGroup A vs Group B
1 _; a+ W: q) {. l# R* s4 w5 o# d如A and B一樣, 即較輕一粒在Group C or D
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Round 2- n+ D, r+ m. [4 F
再在Group C拆成:6 ^7 m8 q) n8 @6 t
Group Ca: 9,10/ O# E, B& Z, D
Group Cb: 11,12
$ a3 L' e' U  V; b然後再秤, 如一樣, 即13為較輕一粒.  c+ e8 Z9 D# N* D4 y8 u. U

3 g0 n" Z' K8 }; ^3 i( e  |如不同, 即較輕一組有一粒較輕波子在其中, ; I' P3 p3 a7 [5 y2 l& T* D( Q7 d
要再秤, Round 3, 之後便知答案.  S0 N8 q  T) r

5 Z  q$ x- |" K& |( m0 z; Ke.g. #1 假設10為較輕的一粒
5 `( u; S5 v& dRound 1
0 i0 Z2 d& Y( h* W& r% f  u( S1,2,3,4 vs 5,6,7,8 = equal
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Round 2( I! t  S1 G1 H
9,10 vs 11,12 = 9,10 < 11,12- m+ G7 k! [0 z' F0 e8 B5 ^
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Round 3- ?$ P  i' d) ]7 W
9 vs 10 = 9 > 10& h  b; T% O1 n' h2 }# A
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The answer is 10.
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e.g. #2 假設7為較輕的一粒, T/ V; u8 ?" S" Y( g" m6 X: _( r
Round 14 L/ `; b3 s5 i' r! t# t& \
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
! [" A) Q( X- C6 u6 B: @1 g+ h; H5,6 vs 7,8 = 5,6 > 7,8
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- a- O. q% ^, L/ ERound 3
5 w' E  E- f  {) w, e0 a7 vs 8 = 7 < 8
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+ @* T; Y& q) c+ K- aThe answer is 7.9 y1 _+ r9 l8 I- ~: R$ i* O6 k

: ^( m9 ]% N) R0 D) ie.g. #3 假設13為較輕的一粒
! `9 X( X# G. _9 HRound 1/ k& N) v  P' P
1,2,3,4 vs 5,6,7,8 = equal9 ^* B0 O7 @7 n
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Round 2% J5 k9 C+ e6 X5 h% w" A8 ~
9,10 vs 11,12 = equal
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4 S& y1 V+ _$ @! B6 G, RNo Round 30 U& ]$ `! o9 l9 X2 A" v

; H- P1 f! V6 e1 m2 F" v5 _! ?) _The answer is 13.7 g: v& c$ z; y' \( Y8 N

, }! S) U1 ?  Z+ D$ V. ~3 G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
! I7 m8 I/ H6 t2 ?if 1-6 = 7-12     13 is fake4 R' ]* X+ G; H$ w
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if not & o: P2 L* c( |7 a$ ^
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Weight the 2 time 5 Q  ]% K0 m, @" s

: p4 P* P3 c# |) ]9 e* V' [Suppose 1-6> 7-12
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9 W% }  ]. Y+ d+ r6 o" {1-3 vs 4-6
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Then Weight the Third1 ]# r3 O' {* B5 F- e2 t0 S
3.* C& W2 h  d  c  b$ T

. [; f. \6 o! [& L6 G; VSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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' P# e/ m8 @3 I; H! P( D; Bif 4=5 6 is the fake one 3 a4 d5 ~. g! C  M

+ A1 d5 y$ B$ k# ~6 d" W8 Xif 4>5  4 is the fake one / D) w/ x+ J3 x# D! [" P! r( O, f4 V
and so on......................

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問題第二步3 g& U/ v* H3 `

/ k( Y. u3 H3 L: h. I, MWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6# D* C8 q4 ~7 ^! b+ S; {

& E1 P( |8 l! Z- u9 [! ]& f你第三步点去搵 7-12 边一粒???
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6 x! {6 h) s2 h" w! v========================================& |" H: f0 s( i6 ^

; M( M) E6 A1 U! A" D) Z& N問題第三步
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Weight 1:  1-6> 7-12
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- j* E! @9 {# P2 ^1 BWeight 2:  4-6 > 1-3 $ i8 @6 R, `3 n( @) C" o
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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