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! n6 B2 S# \* Y2 T  ^3 N0 ]2 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)。* Y1 Z# T  M, L# a
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？』9 N' ~4 n3 @1 K) C$ R
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注意: * a. ]9 v9 u2 G. l8 i5 ?

8 f# q1 F! ^2 [7 i& L: P1. 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# A0 I& b" J, P: Y8 V) M

1 _3 \2 s( L0 f2. 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. B3 X' o+ q  R- ^2 Q
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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:. [3 F" E3 S5 D$ E+ |
相信e條題目都有吾少人玩...

7 y/ n% m, H) A- x2 H我以前畫左個chart去答,
/ y0 @3 G% w. P* v. @; a9 E9 ]等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
* a  \- q3 u+ u8 Z13.........3 d) `) G  h# B( C2 \1 o

; x. o" B2 P. t1 g9 a[ 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,
' @  L( {- T% H/ j$ d( ?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:
5 ~( U) D; I- `' d2 Y8 K唔識隱藏...已經諗到..

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sor !!!....e加改左
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' E6 K& }1 P' v  Q2. 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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* K7 s( k+ r" l9 E! I8 y* ^[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:# }+ O, x) t- Z, U# V! z
相信e條題目都有吾少人玩...

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6 z" o" ?3 n2 A" bPlayPlay, Let me know later who has the right answer and I will add points accordingly.: C9 c! m+ l" _/ n8 b8 {

$ D- e* K3 T6 WThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:/ h5 R! w2 Z* X# \8 N3 t, z
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.# o( i4 k! @( g2 S: L

4 c3 H6 K9 e0 f  x5 S) g* Q  r0 jThanks

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2 b- Z6 L/ d0 T5 G2 J+ J: R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' x4 C- Y6 p/ M; T9 n
if 1-6 = 7-12     13 is fake
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if not . Q  K3 _! f, S$ Y! R' n

9 N) s8 q" Z2 z3 ]& L3 E( @6 Q& GWeight the 2 time
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/ ~. R  A, V  i( \Suppose 1-6> 7-12
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' w  b& s* H( c# A% O* S1-3 vs 4-6
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5 f: B+ U  N! Q' g7 D- U! X8 MThen Weight the Third. F7 s  r. F. I
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Suppose 4-6 > 1-3
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* k( b  i  L# S+ t" CJust like the first Step
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" G$ F" O5 ?& g9 v! t2 \7 F# @4 vs 5 7 t! a: [" ^9 M; B1 I9 a

$ _: _5 C- v; l8 Y+ oif 4=5 6 is the fake one
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; h7 c1 Y; e- v: s' E+ U4 }if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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% q, @8 y( f! R+ [7 nGroup A: 1,2,3,4
% |# A5 I0 I, i% U/ Z& LGroup B: 5,6,7,8
  S& \4 F% g* ^: xGroup C: 9,10,11,12
, J0 I# Z* m! y0 N0 C/ W+ XGroup D: 13" D2 f1 m7 |' U

4 e& e6 b0 M  M5 QRound 1
3 s+ ~: @3 D0 H8 Q3 B1 l3 p  Y" xGroup A vs Group B! P; z4 h1 X9 t, ?3 A
如A and B一樣, 即較輕一粒在Group C or D* E6 j/ {( }2 L  y1 j+ G0 Q

3 c5 l# H8 L, h0 Y- o" I& bRound 2
0 c: Q6 P8 a+ E. H+ t再在Group C拆成:
- W! ?1 C9 t* x0 zGroup Ca: 9,10
  ~: ^2 `: t; h) j( H* L0 b0 MGroup Cb: 11,129 F5 ?5 u  H' _4 {& K* u# I: X
然後再秤, 如一樣, 即13為較輕一粒.& q/ {" K* u/ e4 c
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如不同, 即較輕一組有一粒較輕波子在其中, " l  s" G! u4 p- J' [/ B# y
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/ a5 l0 F4 a  q  g# U7 k
Round 1/ @. y4 w! }0 b7 D. Y
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( B' K! [) i: v4 T' o( C9,10 vs 11,12 = 9,10 < 11,12
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Round 3! A% ?$ Q5 a$ D5 a1 ~  m
9 vs 10 = 9 > 10& Y3 R0 v% l: I! r9 Z
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The answer is 10.- W; l! M2 ~( z" y2 ~
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e.g. #2 假設7為較輕的一粒
4 t# P6 i* M& Z, S% \! g8 cRound 1
+ \  n/ c! F/ u# J4 o0 E1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8( a4 B6 c7 L1 a) A# I/ Z
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Round 2% r9 R8 t2 _/ d' E+ Y% U
5,6 vs 7,8 = 5,6 > 7,8
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7 O/ S( b4 @1 _4 Z5 X& P1 v! \) ?Round 3' N$ \5 h4 Y* W; b- h
7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
8 Y! L3 C! s0 e" r( J2 G' ]Round 1
8 i& O# w$ H7 C$ ]( D1,2,3,4 vs 5,6,7,8 = equal
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Round 2& B! r. L* l( X- j3 J8 l
9,10 vs 11,12 = equal6 A; K  d! z3 ^) e4 M
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No Round 3
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The answer is 13., M- O& Z+ x$ s' x# r& Z- g$ ?
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唔知我答得正唔正確呢?! 7 p5 W: C8 T. G9 f, k7 Z7 u; i
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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 7-12
3 B8 c9 G6 X8 b. H2 @/ zif 1-6 = 7-12     13 is fake! [9 k: Z0 f6 e/ D$ A1 i1 `

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+ X4 ~/ z' ~' J% nWeight the 2 time
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/ [2 |4 q+ }9 o8 i$ ^Suppose 1-6> 7-124 G6 [1 k3 b! u: s7 i( E
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1-3 vs 4-6 $ J. H, D& D. D+ @

; I- o$ ]5 M1 h+ iThen Weight the Third
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Suppose 4-6 > 1-3
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5 h; N. y+ ^0 T1 c0 NJust like the first Step
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6 t4 h; v/ @, A8 o& j# w, B4 vs 5 4 |6 h) z' j* B. Z- U' G) N
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if 4=5 6 is the fake one 1 M, d0 {# L$ C- c/ y5 Q

( }) s! ]# \& A! h/ Aif 4>5  4 is the fake one
" V- p! f, ?8 R3 T8 O. s7 @( O% @and so on......................

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, }; z* I! \5 |: Q; t: a* L2 z問題第二步4 i9 B' v; [& T) B$ }# W

* s: \+ Y: d6 n% l& |' fWeight 1:  1-6> 7-12
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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???2 x; D1 O$ j9 S7 N9 ?; F

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問題第三步, i$ ~, U( ^9 j0 t0 _, H' ?4 Q

8 R' U/ c: l, h+ `. j5 L5 ]/ u( i- vWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 ) _9 K9 X+ I7 I9 t  Q& j) ?; ?

9 t7 E1 h+ W/ l/ S4 T: h4 V; w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