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- R* r$ ]9 L0 {0 ]2 p5 n1 j

# e4 v; X3 O& z『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 m7 N6 y3 Q' e" `
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？』! ~/ C. ~- v+ N( R
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注意: + p2 i: Y9 [5 o5 v/ m" B/ ]

$ ~2 V7 D1 W  A. ]) |  g; A1. 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/ F0 f& B/ ^9 h" ]
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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
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1 `: Y0 r9 j% @0 {; j# g[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
/ J9 R' o4 H. _4 L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,
1 j: {& m% T3 C3 M; W3 I! i等我搵下仲在吾在8 u4 y; q8 w9 x4 W  D, U+ o7 p8 e
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當日用左37分鐘答１２粒波子，差７分鐘才合格。7 D: c; V( [/ P8 Z" p9 O
13.........
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- Q# g: |" D6 T[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 \) X& {7 A& I

; b( n- z- b; u1 p; z/ v5 M/ d9 W我以前畫左個chart去答,8 A: y* p3 l5 ?5 f& n# ^
等我搵下...

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2 t$ A; U7 x; m# c$ n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:; }( U. c5 u9 y/ C$ x& r$ c4 C* Y
唔識隱藏...已經諗到..

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% E) a& [- V8 Nsor !!!....e加改左* q1 s4 h- ?' X, c" R! T5 E
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:& ]  N" I( }2 h
相信e條題目都有吾少人玩...

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, o/ V, g  Z4 e& IPlayPlay, Let me know later who has the right answer and I will add points accordingly.% U$ R' t% Q* n. A
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:* [4 W6 b  |+ i* E5 q+ P4 f

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" Z+ Y$ s) Q/ X0 b7 WPlayPlay, Let me know later who has the right answer and I will add points accordingly.. z' P& x" A% {  N& V
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Thanks

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# H. j$ V, N/ a) Y# _& I: J/ S不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
: s' p, s7 Q4 ]% Y0 N1-6 vs 7-12
4 o$ n  y$ r' M8 x& K9 iif 1-6 = 7-12     13 is fake3 y) p$ Y: k- Y, g

  n  @+ d& S3 s5 s. P) T' Nif not
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Weight the 2 time 1 j0 A/ |# d* X6 M0 d

# R8 p6 I7 N( R* o" @6 n# k: ]Suppose 1-6> 7-12
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' K1 I5 O0 Q- a8 J( p1-3 vs 4-6 : c2 C4 j0 W4 X( r  F

6 \/ e/ d9 D# q  oThen Weight the Third3 `6 w8 C; i* T( [& `/ t
3.
  D# o. J1 u  Q) }5 I
* d" ~0 f8 ?5 O' kSuppose 4-6 > 1-3
! n# E2 _( b8 T! r) ]4 i6 ?: ^; O+ S3 J: k( e
Just like the first Step- ?- g6 Q  z! K# v) ^) X

6 s& w  `4 F+ `4 vs 5
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" z7 Z, P# p. dif 4=5 6 is the fake one   I- F/ `3 B- O# ]

' G" f% m. N2 ]1 ^' H3 `' V& |- c& @if 4>5  4 is the fake one
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3 O/ _+ ]$ z) H" M4 E! uand so on......................

hello1997

分3組4隻波子秤- K( H, ]1 {3 ?

" n) }2 I, \5 l) VGroup A: 1,2,3,4
& j! D# _- ?  O2 u8 PGroup B: 5,6,7,8; k0 I1 t9 R8 o9 t* X" ^
Group C: 9,10,11,12
& [2 m% j6 R7 s( ?1 x2 H: ?& AGroup D: 133 {9 K6 V7 h! [6 I3 x! w

: }% {3 j) P: l1 ?1 s" Y3 DRound 1
* `) s0 V% y- t1 u  S( c4 RGroup A vs Group B
1 k/ t1 M" N8 R. g+ ]4 s3 h如A and B一樣, 即較輕一粒在Group C or D
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Round 2
( Q3 J8 D  m: i5 I' d3 n- F再在Group C拆成:
7 G8 |5 g( V( _. rGroup Ca: 9,10
# d8 D1 `6 W5 v+ H/ m/ [Group Cb: 11,125 m1 l2 Z/ R4 v3 e7 r
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,
0 D& C. v1 ]$ g. ]要再秤, Round 3, 之後便知答案.1 W) s. l7 @& t8 b  J  Z! r
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e.g. #1 假設10為較輕的一粒
/ w$ Q3 C- z1 A, H0 ^Round 1
- {1 G2 O; T. M& ~. K7 r1,2,3,4 vs 5,6,7,8 = equal0 M/ P. ?9 Q' f0 G5 `  m4 p$ m" e3 N6 V
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Round 2+ }: ?* m+ Y/ M. D4 C
9,10 vs 11,12 = 9,10 < 11,12: H9 K: |; a' v
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Round 3' F8 P9 g$ _# i% F8 X4 j
9 vs 10 = 9 > 10+ q$ X: }% L( m
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The answer is 10.
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4 I% b; l  b  p7 r; J. q1 z4 fe.g. #2 假設7為較輕的一粒, J1 s# [- d3 H/ ^
Round 1
& d/ w& N$ O. l* `4 X/ M1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
4 P" v$ p8 E' L) A2 R7 T4 [* N5,6 vs 7,8 = 5,6 > 7,8. A# \, P' x: w$ c

. U1 W& \! z% T' y" c( C7 t8 pRound 31 Z6 n6 @7 e% H) A
7 vs 8 = 7 < 8
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/ M! {: o/ e6 G* e% R! c8 \The answer is 7.) y7 C: X0 m# [1 x( i- }
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e.g. #3 假設13為較輕的一粒4 x% L  ?5 e$ a: C& Y" o$ j
Round 1
. z; ^( _7 X# x1 v2 \1,2,3,4 vs 5,6,7,8 = equal
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Round 2
: B* z7 z* z% k" E3 [; j- Q9,10 vs 11,12 = equal4 e6 x6 W9 f# j$ t( W; G8 r4 [) b- s
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No Round 32 ?: u! v  q4 Q) _' z: m4 n$ u

. m2 C4 x; |: D. m3 B3 Z5 _) CThe answer is 13.
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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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* J" r* L% ~3 b% y% R* r1-6 vs 7-12' J! I- G' |' q
if 1-6 = 7-12     13 is fake. A( ^" X/ x7 C% D, y

$ f2 ?6 z# ]. j9 [if not   L0 J; y& K! K. W( ]
! D2 r; G- ?1 H5 @$ _8 C( d
Weight the 2 time 1 `/ N$ S/ M5 a; ?

$ L$ o3 x$ q5 }: `+ KSuppose 1-6> 7-12+ r6 P0 p8 j8 z9 s, T& t9 Y) ]" @
7 l* I; y. n6 T0 T
1-3 vs 4-6 ( \/ G& w; `8 Z9 Q( ]1 G1 u" G
0 ^/ m- Y4 ~7 d, o9 v
Then Weight the Third8 j- _+ G6 Z* C. ~
3.
$ t7 P- g4 L$ {! j( t3 T
  F$ K9 V; ?" F3 Z' tSuppose 4-6 > 1-3
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& V/ A1 I% B2 W1 wJust like the first Step1 O, _4 G, t. E- L3 b

1 x; L' I3 m( C- E4 vs 5 $ A1 _" p8 [: @+ n: w: q2 Y

0 Z2 @% G4 D( e; Y, J* d9 A8 aif 4=5 6 is the fake one
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6 }$ t) y! n$ Oif 4>5  4 is the fake one , M! Q3 D9 h& g( |  M
and so on......................

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) {! O8 ]- p, r! d* {3 J問題第二步
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Weight 1:  1-6> 7-12, F6 T* [, F8 q$ m4 P

. k) p# n: n. n' mWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ z5 T, h% A' f. ]0 d9 X你第三步点去搵 7-12 边一粒???0 u  N! C0 g. F( u
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========================================
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) v4 m8 ^) Z& X' k問題第三步
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" E: j; p$ i6 k5 S6 y  S, pWeight 1:  1-6> 7-12
+ m7 \6 y: S8 L# _1 v, Y! n( R, S' w8 N1 A$ L0 J
Weight 2:  4-6 > 1-3 ' m0 }- ~1 a0 p) V, Q+ T
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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