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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9 ~" _  d5 j5 @『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)。
) j( o9 k0 O9 [  c' S. J. z: 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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注意: ! f2 S, y6 M' {% Y$ y: [8 j

# J5 R4 R- H. l5 z6 m' ?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1 M! [- D$ h- H. q6 Q+ u9 s

& E2 g0 M+ E1 O' ~* ?5 T2. 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6 A4 {" ?# V, I9 f7 l8 l  e7 I3 J

: Y9 d* u. ~4 T& `! x: e1 P[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:. V3 i; B) Y0 o6 N! J1 }: {% R# K4 v" ^3 {
相信e條題目都有吾少人玩...

& e! z0 M6 v: g0 Q+ W3 {我以前畫左個chart去答,
8 Z# d  |9 G- z. Y2 E3 Q8 g等我搵下仲在吾在0 ]' u3 k- d+ x8 t4 q( N8 D. l
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當日用左37分鐘答１２粒波子，差７分鐘才合格。7 B1 a* L7 T4 k: Z- ?. ?0 l
13.........( u4 @1 U+ I/ @( m0 ?
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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:8 I4 B, a0 T$ S, j7 {# G7 b( L

) n. L0 r$ u2 ^6 H1 d1 Z我以前畫左個chart去答,0 Q  U! ^6 |" D; D0 W. g: @( ^
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:( F8 L% _' m; C
唔識隱藏...已經諗到..

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+ }8 q1 q) R+ Bsor !!!....e加改左1 L4 Z7 J4 K  {3 X% ]4 N& Q
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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: C( X  q% X/ n  v# j

3 u0 v6 L3 Z1 v; A- }[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
% `5 x5 E% {( Z& L& _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.# x% B5 W. w1 r9 [9 I4 |5 w

% E, o# u+ G( r; z+ xThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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2 u) P* A) F: c/ T7 n; wPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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/ M# b8 i" e, O2 |& E1 D不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
2 I3 Q/ K9 x0 y1 J1-6 vs 7-12! K0 f9 J* a0 z. r4 f; q3 l
if 1-6 = 7-12     13 is fake
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if not * }2 i. T' N1 D

0 {+ s* P5 C3 ~; a* v( zWeight the 2 time
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Suppose 1-6> 7-12" z6 V' S6 s/ |
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1-3 vs 4-6 3 A8 W  _& Z2 G  N) N& x
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Then Weight the Third
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8 D1 R1 t& }( R$ ^7 x* k* t. r" GSuppose 4-6 > 1-38 \4 v! }8 r6 ?0 E! J

) ?( i1 B. C3 N9 N+ bJust like the first Step/ s/ s' D- Z& k; h  z* O7 I: ~- w! K/ R

5 ]$ P0 E# e+ I7 N' x4 c4 vs 5 9 n/ @3 W  X' v2 p
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if 4=5 6 is the fake one
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! `. q& n( ?* X' E/ _& Z0 Eif 4>5  4 is the fake one ( L2 z( G, }1 g# e$ a
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and so on......................

hello1997

分3組4隻波子秤$ f$ j' r0 W- B
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Group A: 1,2,3,4
* Q+ {% [0 ~. W  S5 B* ^Group B: 5,6,7,8
" x, q6 a4 v/ j/ _Group C: 9,10,11,12* m! f; t% ?1 T1 g' u
Group D: 13+ ^! \; q: ^% }# U5 Z

7 n+ Z6 d1 X+ B& ZRound 1! c" `2 K2 g, F! j8 O
Group A vs Group B
) X( a4 @5 D8 u3 d# b! W如A and B一樣, 即較輕一粒在Group C or D4 w* z" y# n7 I8 \4 a

& C2 w$ D  O3 h: C, }2 jRound 2  w  s& i0 z) s+ W1 M7 @
再在Group C拆成:
# M+ J; y" i) `# ~1 |& GGroup Ca: 9,10* t% H* P4 ]1 l: D/ c1 z
Group Cb: 11,12  g3 Z; p- K# m9 \/ P( C
然後再秤, 如一樣, 即13為較輕一粒.( D( M8 F9 g# f# q2 R
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如不同, 即較輕一組有一粒較輕波子在其中,
" H0 K- v* X0 j6 ]* \0 v* l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6 d6 H* M4 Z2 `
Round 1
; t0 p5 A( d( S3 k# V+ G1,2,3,4 vs 5,6,7,8 = equal
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Round 2
& E( J1 m# W- Q! g4 y5 f: j( y' m9,10 vs 11,12 = 9,10 < 11,12  [/ i& P  m2 _5 t

9 T6 s9 E% B) C; {Round 3" l/ V* o+ m9 m# _  x; l4 J( h
9 vs 10 = 9 > 10
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- ~1 _: ]) G; u: D' O1 `The answer is 10." F) \. B+ u$ Z, P& B6 K: i6 i

/ R5 M# \5 p3 B0 i4 t; q& ve.g. #2 假設7為較輕的一粒* }5 R/ P8 V7 D) r+ U9 o
Round 18 ~$ @0 X. [. ~
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 26 |7 ^* j$ x9 l- f/ }  t8 K
5,6 vs 7,8 = 5,6 > 7,8' H( T' c. L- i+ @0 m6 }

! K0 Y: ?) }, `9 k* iRound 36 W; A8 \. E: c
7 vs 8 = 7 < 8
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; {: M$ t, s. q3 U: bThe answer is 7.* l. {) U" p  |9 _0 n

) Z% @8 v. |+ N9 J1 l9 he.g. #3 假設13為較輕的一粒0 q$ Z1 F  u2 \$ w
Round 18 E7 Z2 L8 T" y- l* a
1,2,3,4 vs 5,6,7,8 = equal, c) Y4 N% j6 e  P  X6 ]" l5 `8 P
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Round 2
$ L1 D0 T) Y* l7 Q! f( P9,10 vs 11,12 = equal
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, i9 t. j1 n# V4 ?* x8 D4 BNo Round 3
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The answer is 13.# t! L( h" k! v2 i9 P$ l' Q: u

; C7 z. k  T, G* ^( A; M& a唔知我答得正唔正確呢?! 7 g1 G: B- k7 ~6 g0 g5 N

3 X/ A7 `$ C. P3 N[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:/ I0 o9 _$ c* J) a- K* \
1.
6 l6 Y7 w6 b- T* s" }1-6 vs 7-12* [7 b- @& A$ h' f8 ^5 J) \# R4 D3 j
if 1-6 = 7-12     13 is fake+ @& |( D! ~4 C( e; {, }

* m: k3 `  x; L/ bif not
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" F2 y. ?4 j$ B9 B8 IWeight the 2 time & c9 X6 \  }+ V2 e: Q: k" S

9 K7 v( g) R6 P6 aSuppose 1-6> 7-12' {" Q$ n# B& F1 p
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1-3 vs 4-6 0 r. k( w/ e: H: _- P8 t
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Then Weight the Third0 D% s9 s& y* u  \9 y1 P8 R
3.
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Suppose 4-6 > 1-3
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Just like the first Step5 b4 k3 J0 E" X' J( y
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
1 Y  r; J- r& ~3 l8 Dand so on......................

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問題第二步1 S9 K7 u. m0 }9 Q, B

) |, `/ z( I. c/ Y4 b- W' LWeight 1:  1-6> 7-12
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3 ^  C6 Y- m; ^1 U# m/ C+ w: [Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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) E0 T4 V! f) g6 L! |+ o) D你第三步点去搵 7-12 边一粒???
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問題第三步
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8 d* ~, N0 q; D# o7 m9 C! NWeight 1:  1-6> 7-128 c8 R9 p- f; k9 s9 \
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Weight 2:  4-6 > 1-3
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2 L% a& j3 t5 V+ K. t, a+ H: R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