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8 m  L8 I% i: A4 _* M
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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)。) q, f: |( A! E! L
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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, z9 P9 q* k: q' ?) H# Z注意:
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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( d1 G$ S3 V: W4 i
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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' U$ R# l/ t6 \* R7 D
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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:/ D5 p% y4 r) [6 o' g
相信e條題目都有吾少人玩...

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我以前畫左個chart去答,
9 S" C* i: G! c, y等我搵下仲在吾在
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! g- C- u" S7 U7 W, w; P. Q當日用左37分鐘答１２粒波子，差７分鐘才合格。
' c/ X+ s$ v1 `% T( 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 m3 T) c2 B1 V5 i% T5 j- O7 m
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我以前畫左個chart去答,
1 I; N# Q$ O3 ]等我搵下...

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& `- W5 f7 o1 D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:
0 t/ K. K" x4 E* }% m, W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
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$ h2 T+ [/ x& E[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
* I4 {8 R5 \  l" W7 c相信e條題目都有吾少人玩...

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: a& k' X0 v- A( JPlayPlay, Let me know later who has the right answer and I will add points accordingly.% c+ u  }! F- v+ R6 d' d

) N8 ^3 _2 r; G' R1 T( gThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: F! q: A0 o$ _4 J; \

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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7 U" Q. `( O) F. b5 C1 k1 @Thanks

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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 7-126 D" I- _! ~6 S( O+ }
if 1-6 = 7-12     13 is fake
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if not 6 n5 C  }6 K  ^% u6 \$ S* a
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Weight the 2 time ( b. O+ n+ {8 n# q$ I: J3 M. Z

9 Q( ^' k7 V0 q# E) E) d# z) RSuppose 1-6> 7-12# s, G1 O) L/ h5 n/ X0 N

5 b) a) E6 J! @" E2 c1-3 vs 4-6 * W( L" w6 k1 ~0 J* f
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Then Weight the Third
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Suppose 4-6 > 1-3' T' X0 E/ P5 _1 h) i6 r
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Just like the first Step
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4 vs 5 * q9 N% |( p( ]  x

; {' A  H" f" t3 U; W3 T3 m1 |if 4=5 6 is the fake one ! r9 }& m$ s( C* N. p3 l4 R# y

) f' i/ _2 |( Q* Yif 4>5  4 is the fake one : Y9 A" A2 t# V

+ \0 a  t; T- y; E8 tand so on......................

hello1997

分3組4隻波子秤3 L5 G8 \. O- }, c$ E, C8 L

, n$ ?) t! d. I1 E1 EGroup A: 1,2,3,4
' `9 c+ @8 U" m9 r  TGroup B: 5,6,7,8$ R* |7 j: w9 i$ ~! w
Group C: 9,10,11,124 }5 b3 J5 F. q$ M* j6 X3 @
Group D: 13" G  L' K" T, Q% _) H
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Round 1
$ Q  f) S3 Q+ S4 H' _( zGroup A vs Group B
6 q& H1 q% t6 p. B) M如A and B一樣, 即較輕一粒在Group C or D
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Round 2
! W' l3 R7 r6 a" f. s' K再在Group C拆成:$ i. D% C# c# D8 N( L5 @, F
Group Ca: 9,10: E! \! e8 U" e/ ^; m2 S$ j
Group Cb: 11,12
& I" J. l+ ~  W+ K  N5 V然後再秤, 如一樣, 即13為較輕一粒." h" K4 C8 A8 V* t

. R& S, A0 [- X  f4 N6 y  Y  m如不同, 即較輕一組有一粒較輕波子在其中,
8 U  A6 w  }$ [+ [4 q6 i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
% K: W! B) Z* m! x( Y$ xRound 1+ V8 s* I6 p1 p6 v/ e, ?- |
1,2,3,4 vs 5,6,7,8 = equal
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Round 26 ~6 V4 f" k, ?' a- b" n
9,10 vs 11,12 = 9,10 < 11,12/ e& V( E  Y, y# J# \

- C8 E5 x# [7 j9 s  b4 w+ tRound 3
* V$ k, I( M" `- K* G, _+ m9 vs 10 = 9 > 10* u. y- m: O; G

: c* ?. Z* u; f) v6 ~% c9 X* T& jThe answer is 10.- Z4 o  \& ~5 N% g+ L7 z, H
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e.g. #2 假設7為較輕的一粒
4 n. Q5 h& z! Y! y, jRound 1
6 \  Z4 e8 Q* T% D! t. B0 }1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2' a: I! N9 h  E# O
5,6 vs 7,8 = 5,6 > 7,88 q" T4 f  R: P

% k$ O: X- V/ M4 cRound 3" J5 ^, \0 p% u" I& A& R9 s* V, f
7 vs 8 = 7 < 8
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) ]+ }, L; P" Y5 XThe answer is 7.$ ~$ U. Y: _$ `2 B( I3 y
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e.g. #3 假設13為較輕的一粒0 w" w$ w4 l% }, }3 g$ ?
Round 1, V! w  f* L3 `& {7 r
1,2,3,4 vs 5,6,7,8 = equal
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7 f- }! M: W, R7 o9 L# x- h  sRound 2
0 X# n" {. S, R4 Y9,10 vs 11,12 = equal
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No Round 34 H7 q% v" e: d- c

, a6 \, z, i; v4 N8 g3 UThe answer is 13.
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6 _; a7 F( b- |3 T. x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 7-127 ?  |5 ]- c) H" \9 r1 ~6 \7 Z
if 1-6 = 7-12     13 is fake' a9 G6 Z0 d( C. p, h$ n0 u* S$ L

% |' C/ d- T) P+ L. ]& o, B6 a' uif not
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( \) L+ \3 J; }2 dWeight the 2 time   Q: e8 t# y! Y8 M
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Suppose 1-6> 7-12
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5 o8 ^, j; a7 ~; t: l) j1-3 vs 4-6 8 p- B6 `# ^! L; W9 N

& R; K  c1 Q* p3 w( m( j+ ^Then Weight the Third
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Suppose 4-6 > 1-34 N; v) L1 J: s6 R! \- s
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Just like the first Step: @0 r0 u) ^' J' N1 h
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4 vs 5
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) y3 A1 i9 m: @7 b0 O/ f  ]* |! ~if 4=5 6 is the fake one
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1 H3 L5 g! g& e6 ]if 4>5  4 is the fake one
) R7 p7 x5 x; T7 n; U; G7 M, Oand so on......................

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6 V1 w( M( |8 o問題第二步
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- x( l2 W  Z* eWeight 1:  1-6> 7-12* p- P; i. ~, K+ Q  P
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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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8 A: ?: G' T* O1 I! h" L========================================
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$ p2 H8 i; T0 L' }/ L! L問題第三步% C- E& A; z* P
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Weight 1:  1-6> 7-12
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' S% V  H' H; j7 v3 a& iWeight 2:  4-6 > 1-3 ) C6 X6 n# t8 l9 c* @; M
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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