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2 s8 ~( h4 h- g( q& C& }0 N
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『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)。
3 {! C( K- Q1 }+ U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？』4 J! q5 p; j$ j$ E
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注意:
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' M. B$ G7 t( P* F) \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: a7 ~6 G& g# K  `! j! E

0 ]# ?* t, L' I% {8 }/ |% L[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:4 s4 b7 u  W+ ]( e# p
相信e條題目都有吾少人玩...

! X! m1 |" ?) g( |, i% t我以前畫左個chart去答,1 C( E. d" t9 {! l
等我搵下仲在吾在! n9 D, I  ]  S  |1 r8 o

! n* G) z! T% b7 ~當日用左37分鐘答１２粒波子，差７分鐘才合格。! _2 n0 u; B* d' u; h( T0 T
13.........
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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:/ ]( l$ r3 T* e- x( A

4 n2 \/ {4 s. @5 p我以前畫左個chart去答,6 }1 ^& Y& ?: \7 ]
等我搵下...

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+ T* x% A3 z, _3 x7 h1 g+ `$ l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:7 A, y' t' w# R) o1 ]( Y6 k  Z8 H
唔識隱藏...已經諗到..

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# {- z, H+ ]  b' Q) X; X
sor !!!....e加改左
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" ^, U  [- L9 \( f0 p! K) Q1 g+ h2. 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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6 X. ]- |1 \1 Y; O% ][ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
) r+ T! s8 N1 K0 r' a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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2 M+ x: J+ G: `; S8 ~" nThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:# |/ z7 U# Z3 [  I( {' B6 f/ @, E: }$ Y
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( B  m7 x, R' u) a' @' _PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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! {" K2 W& d) c* d1 ]3 g& `+ pThanks

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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
2 r3 a6 s( I$ t# o1 H7 |* zif 1-6 = 7-12     13 is fake0 S  J4 S! c6 ?/ }+ q

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Weight the 2 time + }/ G9 `% z9 t/ e5 R- l

) @" j7 Z! _& Z; PSuppose 1-6> 7-12* n- S$ S1 d8 a! _

3 X7 l4 x9 a+ b6 b6 R; c' ~& E( B1-3 vs 4-6 ) v. S6 K0 l0 o. C

' X! j! B3 D" O; N" f8 sThen Weight the Third* o8 v7 x- k# R& r" ^) x
3.2 E( B* X* d+ n- _7 t; J# R

6 i) C3 z: p4 l( }Suppose 4-6 > 1-3* j6 J/ `. `/ t. h: u
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Just like the first Step
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4 vs 5 3 n; T( l& p8 J

% d5 A- C  t' @; A. Oif 4=5 6 is the fake one 9 e$ V0 r; S7 P2 m# F4 ^4 B
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if 4>5  4 is the fake one
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4 F7 ^9 E4 B8 J+ I( \1 a; }# m4 Y0 j  f* Fand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
* j8 f( N! s% kGroup B: 5,6,7,83 {0 d" l+ c* `# B
Group C: 9,10,11,123 R  ~- u. t7 K& ]/ d: O+ m3 ^
Group D: 13
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Round 1
4 Z6 f' l, h9 R8 SGroup A vs Group B
7 n  {$ D: \) @# }6 X如A and B一樣, 即較輕一粒在Group C or D
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; B# n* }' v) ~8 ?. CRound 26 G$ j( `2 {, @. ]' @/ k" Z$ W0 M
再在Group C拆成:2 ?5 `/ v+ y; o: Q$ B7 T& a
Group Ca: 9,10
/ L8 c) V$ {9 F( k1 C4 M8 hGroup Cb: 11,12, {# G1 Q/ X# X+ O9 Q( d) Q$ T6 Z; ]4 R
然後再秤, 如一樣, 即13為較輕一粒.
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1 M, ]1 S' {4 D0 E如不同, 即較輕一組有一粒較輕波子在其中, 8 J1 ~! W6 \0 i0 V6 N) O
要再秤, Round 3, 之後便知答案.6 L9 S& Z* `! @& o2 N, f7 O# E+ n
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e.g. #1 假設10為較輕的一粒
3 D- B3 b3 G7 b# Q# w5 v9 HRound 11 C2 x  V4 x' f1 a
1,2,3,4 vs 5,6,7,8 = equal. c% H+ k9 H: k* K) G
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Round 2
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; e3 e- o& @: k" c# H* D1 |Round 3
# u) s  ?$ u: L, a' |# j9 vs 10 = 9 > 10
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7 n3 A: L; S' Q) zThe answer is 10./ q' B9 ^2 c7 S) _* ]2 s; t0 {8 q

, m* l& c7 S3 S, v+ N! b* \" H: Ye.g. #2 假設7為較輕的一粒
3 g4 W2 _2 o+ @8 L3 Y7 @. ]Round 15 B" x  U" Z9 c% A
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8) J6 |' A, z4 e2 S
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Round 2
2 l8 q" ?/ n$ b( W& y( {" P5,6 vs 7,8 = 5,6 > 7,8
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Round 3
  B4 q$ L; @7 D7 vs 8 = 7 < 8
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& a% C+ P  K; p! [The answer is 7.
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* C( s0 B0 j6 s( J* s$ Se.g. #3 假設13為較輕的一粒7 t% g, o2 {  h, u9 u4 k
Round 1
) b7 B. G' N. ]; g1,2,3,4 vs 5,6,7,8 = equal
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  _  b% u% g; ~# d/ s2 IRound 2
5 e' P: Z+ b8 l% X! r/ r9,10 vs 11,12 = equal! M% o, S8 o" o; \/ R% i0 t

& D8 u3 t, B- d4 [2 M& y" GNo Round 3  g  L1 u2 u3 J; L( r
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The answer is 13.
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- x( T2 C7 a( _唔知我答得正唔正確呢?!
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' _  f, a# X; E. }3 T- i[ 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# Z8 T3 ~: s% h/ e( W* d7 g
if 1-6 = 7-12     13 is fake
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if not
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) q7 B# u# I% {7 }( hWeight the 2 time 9 h0 e) U6 I3 s8 b3 F" T: @1 m
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Suppose 1-6> 7-120 F% r% T6 K2 h0 R. ^

% A/ P: \2 u. u6 p0 `1-3 vs 4-6 5 h% T3 v1 L3 A3 z- ]  ^
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Then Weight the Third+ F* p7 _  {+ o$ {$ `3 h
3.9 u' S2 B& D+ ~0 F4 Q; O

" G) u$ L. n: rSuppose 4-6 > 1-3
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Just like the first Step
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. U" N1 w( Q; }1 s( F0 M4 vs 5
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if 4=5 6 is the fake one " @8 A' \4 A" v# Y( s6 Y

$ [1 {% L  i# a2 B& @0 R( I4 e; P( x4 wif 4>5  4 is the fake one
# b  g7 W$ j/ J  a& n( Z2 Mand so on......................

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2 o' z& T- _1 A5 [9 ?問題第二步
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Weight 1:  1-6> 7-12" p1 w) k5 b5 M2 A9 L

8 _( {, m& `3 E5 D& w& C$ i0 `8 r( _Weight 2:  1-3 vs 4-6 , if 1-3 = 4-63 h  y; V! v( K4 F6 F7 M$ Y
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你第三步点去搵 7-12 边一粒???
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( T! E& t; Y# s0 ~6 P問題第三步3 ?9 m1 j) y9 d
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Weight 1:  1-6> 7-12! }4 q( t* B1 T. o' R' A2 Q. v
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Weight 2:  4-6 > 1-3
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& [/ h: N! G' {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