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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『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)。
1 \) {8 P0 Z8 `( n& m( ^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？』6 @9 }9 V& ?* y& x0 Q/ c1 X  V2 j
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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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# A- u0 G7 S3 W. O2. 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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8 n) W/ e8 L3 M. _' W8 e[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
1 R2 i! [9 T2 g* C5 s8 \相信e條題目都有吾少人玩...

' i: ~6 u6 [7 }4 k我以前畫左個chart去答,( \4 n( t5 U2 X+ A
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。( u  H) S$ H$ s% r  R4 l4 c
13.........
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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:. U/ A8 T6 c7 U$ o; r7 N

, L4 }" G! P7 s+ d$ H: G0 s, b! W& Q我以前畫左個chart去答,  J4 I1 F3 \' R5 X, i* e  f5 c
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:' q) b! w9 L" b
唔識隱藏...已經諗到..

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8 {5 |3 T3 `+ I7 y2 w  nsor !!!....e加改左
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7 G! c. `5 Y6 l3 r; v9 g7 s2. 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:3 p) q# ]: F# p; M2 x/ `
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.- G( a  J; _' z7 t  f# d
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ x9 A' T% G: h9 _2 A- I) k
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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& d3 L$ L; G% Y( b; S$ T5 ]Thanks

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( `& C" N4 C1 o" d) c7 o2 I$ y) `7 U  A5 g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
0 y% }5 U' a, g; N# t( Vif 1-6 = 7-12     13 is fake
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if not
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. G! F, Z9 k5 W+ S+ K/ m3 O7 ?Weight the 2 time & f5 f$ T8 |+ ]5 n- T% i
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Suppose 1-6> 7-12' v/ G9 M8 x; O3 K0 W

2 F. v9 y% Y( ^7 e9 x. D1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one ' s; }* q" n( K# [

  M, h& \4 v; f3 Fif 4>5  4 is the fake one $ Y; V! l4 F" k. r9 c/ h

( ]9 J& f+ N' |3 Land so on......................

hello1997

分3組4隻波子秤
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& e* v( i1 i3 M5 U  C' l+ K! u# hGroup A: 1,2,3,46 b. h" K* T) r0 [& U" i8 X7 Z
Group B: 5,6,7,8
3 ]1 G( E+ Q& ~. W" r" ?Group C: 9,10,11,12/ G7 H# }, }$ C/ r. t" n# V  _
Group D: 13
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Round 1
& O, E; x0 R0 Q1 b& S# `Group A vs Group B
% _( A3 n/ Z( M% [如A and B一樣, 即較輕一粒在Group C or D
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9 r+ d( x; c' hRound 2
  V6 d' z& A1 \6 Q$ A& b- t) n再在Group C拆成:' M2 r) r+ H4 n7 J  i
Group Ca: 9,10
# Y* T  Y" b$ y, W2 f, a! B  E4 oGroup Cb: 11,12# y! @0 c: ~7 W1 N+ X
然後再秤, 如一樣, 即13為較輕一粒.- C* P2 [# F; g4 p' m

# m, D! L" l& x6 K; u) O$ V如不同, 即較輕一組有一粒較輕波子在其中,
7 Q9 C# i* a: M( U9 l. x% 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
9 `' M' V! a7 C4 C, z4 i- P5 ]Round 1
7 o  j# U) X5 E, p+ b# |1,2,3,4 vs 5,6,7,8 = equal
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# Q) b" ~; c# Q9 G4 |, T2 k- rRound 2& f/ r& S9 o, m/ d
9,10 vs 11,12 = 9,10 < 11,12
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8 ?/ b3 M0 T: |! D5 f" ?Round 3
4 N8 h( i6 [% X  m4 K8 V# q6 @: U+ G9 vs 10 = 9 > 10" u8 _4 W/ N- `

2 a; z* I( B" ~- {) N4 r  M% wThe answer is 10.
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1 f( g2 V/ x4 @6 t0 qe.g. #2 假設7為較輕的一粒5 ~+ g' d3 ~6 p0 y- _
Round 1
7 Z2 g# j' G) g0 X7 K2 M1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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1 y2 G2 S# H1 J* P. t! x* G. `# s, SRound 27 V5 H/ D8 j( o6 j7 ~" ^% G+ W
5,6 vs 7,8 = 5,6 > 7,8- G; t9 `% I; H! h: I
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Round 3
! B/ k" E: {: j  k1 T. u* g, K7 vs 8 = 7 < 8
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The answer is 7.8 f8 O, S3 f0 t( @8 n0 u) k

" Q, r/ _7 z3 ke.g. #3 假設13為較輕的一粒. h, I2 T: c9 |, t
Round 15 P4 `! f- D+ P
1,2,3,4 vs 5,6,7,8 = equal
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2 p2 M3 l8 U/ H2 K; h7 KRound 2
1 c) D( C. r* M1 S+ |! J/ M9,10 vs 11,12 = equal
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No Round 3& R2 [# K; G6 U: M

- p; A5 W9 S& MThe answer is 13.6 j8 v1 ~+ v: _& \# p

( X& z) X, a) N& Y! |5 |- M/ j. G$ K唔知我答得正唔正確呢?! 3 Z" t: {' j9 ]

+ F% C' y. b! B: C0 o% k' k[ 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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: G1 x0 V* A% t- i) D1-6 vs 7-12+ x7 z$ t( q# c9 z! v+ U
if 1-6 = 7-12     13 is fake; _; Y8 m, Q( A9 o

) @0 G, J/ @/ q$ M) gif not + @# I7 R( ?( B

% t- s8 S8 h- h. zWeight the 2 time " q7 l1 i- w3 N: c2 A" V% Y
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Suppose 1-6> 7-12
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& }+ m) |3 b% ^1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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9 A; g' j3 a) M! y& @8 ]if 4=5 6 is the fake one
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if 4>5  4 is the fake one # K( m6 w; B9 H. l% Y( S; n
and so on......................

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7 l1 Z; G7 R0 m: S) O/ d4 U. t問題第二步2 S  O6 z" Z8 t2 q% v9 Y7 t& y

1 [5 f( T' {' Q+ T% ?Weight 1:  1-6> 7-12
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  W: U' _9 ]. D& v; NWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6& K$ S0 @) y7 k8 O/ c( a

" }2 o& }# |9 ]$ n你第三步点去搵 7-12 边一粒???# w$ y$ A3 J6 }, U4 b
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問題第三步, T1 O1 h7 H; r( G2 Q3 e
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Weight 1:  1-6> 7-12
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0 M" P2 u+ n8 s! E7 l- O# \Weight 2:  4-6 > 1-3 / w7 e  H4 p5 c5 e( @

3 h' i) a* q, ^5 I9 G8 s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