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1 O( j6 t% Y  e! v$ b0 R! z! C4 |

7 G9 c0 M3 z3 k% A& y, G+ P『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)。% D3 H! m& i0 M! y" A! a3 t
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:
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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
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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, s4 o/ c9 w/ {$ Y/ @* T
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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:$ ]4 l8 k- V# l' |2 ^# a
相信e條題目都有吾少人玩...

9 o' Q( u% c8 o我以前畫左個chart去答,
& ]2 h, w" I) I等我搵下仲在吾在9 D& e, N5 E. F3 Y/ Z$ g5 t: ~. h
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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:! {+ u6 }- D7 C) ]
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我以前畫左個chart去答,
+ U8 ^6 x1 H& u  Y' 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 {+ C8 d: M6 o( J9 b/ k$ q唔識隱藏...已經諗到..

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# _( ]7 u9 a8 msor !!!....e加改左
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! C1 g: Z% [, m7 H) G2. 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' u, x& f% m& A

9 j: d6 T$ J2 |[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' W: P" [7 s4 J% h) `1 [- d
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." S. v7 E$ b# [  J$ [# S
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:# |! J" m' R2 ^( k3 n7 b

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.0 i0 t" Q- E4 I3 f9 ^2 `9 g
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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 7-12
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if not
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Weight the 2 time
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: v5 J5 _$ h% Q& {* z) |Suppose 1-6> 7-124 L4 t# a4 Z: t& @3 q% {# y* J$ \4 u+ r
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1-3 vs 4-6 5 G& |( u0 i0 q2 {

2 w/ T- r' R, ^, I$ SThen Weight the Third- U! J! m5 ]' f5 s1 l1 ^
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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, K* m% J1 r* T4 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 % U9 T. ]5 L' y. s2 j

' e( Z( O( L. T' wand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,45 k1 S" d9 {8 S4 Q& N" [
Group B: 5,6,7,8" A. Y! Q( J% B/ o) K* |  k/ s5 I( Y
Group C: 9,10,11,12
0 a2 p3 d) `2 l( b2 T9 e. qGroup D: 132 d$ h% c% f( P0 ]$ S

3 [; n" Y( m6 [) pRound 13 x" S& s# [  x# X0 S
Group A vs Group B* o% K! a, t  o$ D1 G" X
如A and B一樣, 即較輕一粒在Group C or D$ B' x' L# W2 j9 {9 C0 R3 V
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Round 2
3 i! \3 K9 W8 j6 Q再在Group C拆成:
) G' g8 L9 V5 DGroup Ca: 9,10& d, a3 Z2 ^! V! u9 E! @  B
Group Cb: 11,127 p; @5 m. V7 T8 |
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,
' i5 e" S( w( X要再秤, Round 3, 之後便知答案.
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1 ?7 z( i/ e1 e1 O$ Q/ ze.g. #1 假設10為較輕的一粒- q- D- O2 @% e
Round 1" L- b, Z! n6 M9 U5 M# c
1,2,3,4 vs 5,6,7,8 = equal! l- j4 h. B4 k( ~/ p
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Round 2
" f( V1 w1 y! O. g9,10 vs 11,12 = 9,10 < 11,12
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9 vs 10 = 9 > 10$ ]2 Y) e, M# X; c1 J1 V

& D) B2 h* k0 @4 m5 ?( |The answer is 10.) r& J% y& x# J/ f0 J! q( {

  g- Q1 Z8 x& h! C9 a$ q7 R' te.g. #2 假設7為較輕的一粒) U( T) [( q1 m7 @
Round 1
$ k! J7 K' w" K# l9 R7 E1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5,6 vs 7,8 = 5,6 > 7,84 R: X+ s5 {$ G% f+ d6 u

7 y7 H' E* @# W1 R" j* wRound 3
: T5 T; E: B5 r, f' n, l8 x! P7 vs 8 = 7 < 8
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6 [. \2 h& [& E0 AThe answer is 7.
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: v% k4 }" w0 n6 w1 ye.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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Round 2. V4 @$ E- O. _5 ]5 F3 Z! A( l0 u9 z- o
9,10 vs 11,12 = equal
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No Round 3
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/ o) G  w  N6 d$ h2 P8 RThe 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:/ t4 p" c; p3 S: M3 {* ]% W
1.
( Y) |/ q* \: s) B! B1-6 vs 7-12
) ]* v9 G# T' y4 cif 1-6 = 7-12     13 is fake
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Weight the 2 time # q6 M8 D* ]/ M: x) P  Y; [5 K' c
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Suppose 1-6> 7-12
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, K+ C8 s0 R$ e/ ~1-3 vs 4-6 % Z, i( s# _& A, t7 V, t8 f) U
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Then Weight the Third" B. m! O$ e# r
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Suppose 4-6 > 1-39 r, V: e6 l0 t& u2 n3 m' N
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Just like the first Step
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4 vs 5 $ \& @, e6 ~. c. N* d
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one . \. L$ i3 W. W( ?# }' Q
and so on......................

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問題第二步1 [5 u2 S+ _0 }. D8 y8 Q  O
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Weight 1:  1-6> 7-125 E) I$ d0 u+ `% T
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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 Q3 b$ A: w/ I9 z' C

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* x+ @0 H7 j1 x/ s$ l" A& b) P1 T+ k問題第三步& q; T) z0 q" H; b3 O2 j
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 ( n; r' c/ c- R. R

$ H- k+ _) T( D2 o4 L' v1 Z: [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