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" F  D% L' e4 G! h$ V; ^
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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)。
& O+ u$ i5 W3 b: v) b0 Y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 K* O. a6 A1 @0 q5 D) r" {注意: 8 ~0 N2 E' G0 n& Q0 F

: g* g' ]0 r3 I3 O' D' H* V1. 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1 V  I; J3 y& Q0 X' E& i4 L
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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4 G4 u1 ~% _% t7 y2 x# h3 q

) ]! B  i4 u6 V& p- x( `[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
* z! }5 ?- y$ E相信e條題目都有吾少人玩...

/ `) y9 l2 n+ H. {; t% |( ~我以前畫左個chart去答,, `  Q) j' I# k7 N6 y
等我搵下仲在吾在! u' ]4 p* q9 O6 f6 N8 u

; ]( W) g7 W5 F當日用左37分鐘答１２粒波子，差７分鐘才合格。
/ [' f! q6 z) i8 p13.........
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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:
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我以前畫左個chart去答,
: H8 L8 d' ^7 z9 Q4 h" h, Y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:; ]+ _( q( `1 X6 A* A
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) M6 W/ k4 y3 R% m

" Z4 p. p/ w( S9 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:
$ e3 P: l. H9 Z+ }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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$ d" Z& G& I% t- zThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:( X) y  s: f* p- l

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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

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3 G9 z* i2 o8 X- {: ^. [不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
4 `! E! g. a3 k4 }( s& }; o; s1-6 vs 7-124 }! f4 k1 V+ O- [6 F* i5 h  p
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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9 ]7 ^4 \' ?0 {2 v: }! u4 l! J8 {4 ASuppose 1-6> 7-12* @& ^4 U8 \" @7 B# W
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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+ D+ b6 V* }; ]4 I! D. ^Just like the first Step
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4 h9 n6 e4 T3 j. D4 vs 5 " t/ }" ^" Z1 S/ \( X( f

! L5 E9 P2 b. Wif 4=5 6 is the fake one % s( A/ m8 Z  b

9 {( z3 C; l  C7 y. ?7 Gif 4>5  4 is the fake one
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' a, k; ]" F' s+ cand so on......................

hello1997

分3組4隻波子秤; s9 O( r; V5 G: j" S
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Group A: 1,2,3,47 [$ {4 u3 R5 _. ?
Group B: 5,6,7,8: O& X. \# n1 Y* l' @
Group C: 9,10,11,12
: G" \8 I9 j6 YGroup D: 13
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( R* I5 ^* ]3 [Round 1) f# `# W) H0 M2 D& m4 @
Group A vs Group B* M0 J2 B* Z- p! H; i9 l5 Z5 m' s
如A and B一樣, 即較輕一粒在Group C or D
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Round 2, y/ S& b" b  b' W3 U. ~! g
再在Group C拆成:) @% Z& s$ {7 Q) Z2 J, a
Group Ca: 9,10
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然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
$ y. @# v1 _2 P- y6 p2 u& \* `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
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+ X5 `  G* u. O& f5 b1,2,3,4 vs 5,6,7,8 = equal9 x7 e1 u1 ?7 J. @, ^& a) z. }+ G

& q' m& F% q1 R# U. @Round 2
  j; X+ C6 B* ~- l9,10 vs 11,12 = 9,10 < 11,12
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Round 3
  f' W% Y' x% L! E; `, P/ o9 vs 10 = 9 > 10
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The answer is 10.
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& D' L. Z  y( Ie.g. #2 假設7為較輕的一粒2 s- B8 ?1 P+ L+ q& u
Round 1
* t: {: Q# {" R+ Z, n# }; L7 w1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2% T) v3 i1 p2 A
5,6 vs 7,8 = 5,6 > 7,8+ F+ o, T" N3 |
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Round 38 x; }1 U+ ^3 i' t% {: V  o( d5 w
7 vs 8 = 7 < 8, s# [1 O( ^$ ]4 ?
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The answer is 7.
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e.g. #3 假設13為較輕的一粒7 I& I, J, @; G. O; q8 Z/ U' X
Round 1
8 R7 ~9 O8 B  y1,2,3,4 vs 5,6,7,8 = equal
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/ R$ C  l2 d/ ]& z. yRound 23 F) m5 x3 u( e' S7 v, R( V
9,10 vs 11,12 = equal6 U2 W, u/ [8 j+ N. R% A$ z) g3 X
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No Round 3
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The answer is 13.
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$ T. x) q$ J  A3 r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:/ ~/ L% ]9 I; R  p. S: A" x* n- j
1.
5 U/ d6 Y9 p+ u9 [1-6 vs 7-12
! J- O/ k3 ^) H+ D$ `if 1-6 = 7-12     13 is fake- z7 J! W0 J! f

5 p% p6 n7 Y6 P- I( _5 S2 bif not
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Weight the 2 time
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( s1 J7 n$ T( jSuppose 1-6> 7-12
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1-3 vs 4-6 3 k* ]$ f* a1 @, V" H
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Then Weight the Third
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Suppose 4-6 > 1-3, W9 `/ X- I- u0 b; i

" X: k. E1 g; r2 R7 uJust like the first Step
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if 4=5 6 is the fake one " D3 f5 Z9 ^; N# t
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if 4>5  4 is the fake one 5 M- A& }5 N2 `/ H' ^& p3 b/ I) t
and so on......................

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, `1 P" Y- ?$ a問題第二步# ~& W& v+ {& y5 m+ R! u
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Weight 1:  1-6> 7-12& }  m3 r/ Z) M4 _* {' h
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Weight 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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問題第三步0 p+ `, i3 Y7 u) z
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Weight 1:  1-6> 7-12
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: _( L4 N/ ~% T, w" ]Weight 2:  4-6 > 1-3 & @$ N: x& z! A4 i/ |& N7 v
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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