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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: y# P: J* o2 k0 _3 j. S『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)。
5 d. \9 Y$ I- {6 z+ o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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( ^& G6 g) ?( ~6 @/ C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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4 |' `4 x% \# I* |6 D+ m- J8 m2. 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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+ h" W7 g: B  Q" e' x8 O[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
1 D' E& `# a* w' V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 W& u# Z( |( M3 a等我搵下仲在吾在
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4 E9 f3 P3 |/ x: _6 O當日用左37分鐘答１２粒波子，差７分鐘才合格。' k+ J( a7 z) |
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:9 c0 ^# c8 G# P# E) {

) \( g0 K! {: L# O我以前畫左個chart去答,: |: W. J6 X& v. B
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:
% o3 |, ^6 z3 v  X唔識隱藏...已經諗到..

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/ f) i& D( |9 p" f$ s0 w5 h+ l0 fsor !!!....e加改左
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9 T! w. C7 w& W2 B8 F3 N, _* t2. 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6 y. Q; T7 M" _: c6 k
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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:' `( v8 f( f6 o( b/ ?
相信e條題目都有吾少人玩...

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; t0 ]+ j! a; X1 lPlayPlay, Let me know later who has the right answer and I will add points accordingly.4 i7 _( N$ p) d; U$ _
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& s( j' `! F' A  \! 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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6 D* r( Z7 V2 W( BThanks

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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

1.
- c0 A* H" d! g$ e% D1-6 vs 7-12
/ @0 w! p* U% u  f0 {if 1-6 = 7-12     13 is fake8 Z% S% Z  a# a2 f
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if not 5 r6 E0 u7 L5 g1 W0 ^0 X
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Weight the 2 time
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" A# E( s" G1 F+ Y- r5 G8 @' {  VSuppose 1-6> 7-12+ F' ], ^/ a( A) p
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1-3 vs 4-6
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Then Weight the Third- D: v" Q0 W2 ?, d/ S& T) x; w; Q9 c8 N
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Suppose 4-6 > 1-3% ~0 x" K8 m* T+ S9 Q, Y7 H% o

3 t- R+ z0 `  {9 G* s2 J; T; w% wJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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. r+ f3 y+ q/ Y* [if 4>5  4 is the fake one ( e. e7 ~" p* F2 K' J* @
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and so on......................

hello1997

分3組4隻波子秤5 w* V( }7 z) \

& P2 X# z5 i+ I( m# CGroup A: 1,2,3,4
7 c9 |  D2 e: X1 p# j6 xGroup B: 5,6,7,86 F) R6 X# ]0 M2 [7 D8 T5 Z6 v
Group C: 9,10,11,12
2 Q' P6 _8 u3 c2 U% u% GGroup D: 13& k$ o7 `% I& C3 G% Y

8 o( @8 G) a7 B* S# w: zRound 1
  j& f4 N: S" s* w  |4 i; T% R  XGroup A vs Group B0 f# i: k: D1 ]  m1 y
如A and B一樣, 即較輕一粒在Group C or D
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Round 2: Y; X5 I' E* t
再在Group C拆成:4 w+ B) ~$ k. E9 `
Group Ca: 9,10
$ @4 R4 S$ u5 T3 VGroup Cb: 11,12
+ c: m! a5 @# q6 W" p7 C# ^然後再秤, 如一樣, 即13為較輕一粒.7 |* x7 [$ \1 R; M
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如不同, 即較輕一組有一粒較輕波子在其中, 8 [% p7 O) f7 ^, {$ s
要再秤, Round 3, 之後便知答案.; x; M- \+ O* [

$ L7 T& Y" T3 ?6 l7 je.g. #1 假設10為較輕的一粒, b( C% A: m$ X" d8 w
Round 13 w, N8 s# a' p; v* Y4 P; A7 h, A- H
1,2,3,4 vs 5,6,7,8 = equal
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% k8 S7 J# F8 s- j, z6 F1 x5 h6 cRound 2
5 e. a. P; E8 S  l7 c; G; e9,10 vs 11,12 = 9,10 < 11,12* H3 B) I5 {. k3 [5 ~

1 u! z: ]  E" t0 DRound 3. z$ T( N1 S; a( N# ]+ l# ]# i
9 vs 10 = 9 > 10
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3 ~. T4 b8 n# v7 w0 I3 PThe answer is 10.2 h3 z; f# w2 r
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e.g. #2 假設7為較輕的一粒
' T+ |; G( i# b! j- y; F9 E% RRound 1
9 B8 H9 R  `$ q0 v6 n% y1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8( S: E/ k' F) j# ^% ~

- c7 e3 C7 ]- i- H7 j& SRound 2
* ~2 l' R# M( _/ N$ g* T5,6 vs 7,8 = 5,6 > 7,8' J$ [: B8 F/ D! d4 `4 P0 L/ i/ ]
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Round 3
/ d) a/ p! o! b! r# _: G; |# {& o& I7 c7 vs 8 = 7 < 8) p9 X4 n# T; E
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The answer is 7.
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, V. I, y% X% q/ m9 f  C# `e.g. #3 假設13為較輕的一粒
) Q* }$ n- c; `. z- ERound 1
1 n" r, o7 l7 c7 r0 p1,2,3,4 vs 5,6,7,8 = equal8 r  g: t1 x$ K4 a# U/ w5 C
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Round 2
9 o1 {: y. M* U: c3 S* E9,10 vs 11,12 = equal
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$ h; y& Z& P4 H* ?7 i7 e9 s# kNo Round 3# J+ j# v, z# X, D$ i. m- m5 _8 S
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The answer is 13.% l4 G- U* D1 G( T2 ]1 Y4 E+ E

" {0 G% y- Z: L5 F唔知我答得正唔正確呢?! 9 k1 Y  J) L! w- P. T+ o. N
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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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) i9 P# i. Z) s; _2 g" I$ S1-6 vs 7-12
2 o, B9 k9 N4 ]7 o8 x! n+ f& {( L9 ?if 1-6 = 7-12     13 is fake
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if not ( R' M2 V/ H% p

, c  X( d$ }% a: WWeight the 2 time 2 J. k2 f9 @% a2 L% q

$ n0 m/ G1 C: c" qSuppose 1-6> 7-12; ?+ Z( K' O& y) @  m9 E1 k$ w
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1-3 vs 4-6 8 l9 z. o6 p( L, q3 ]
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Then Weight the Third
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Suppose 4-6 > 1-39 t; Z6 e, E' y6 [$ L
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Just like the first Step
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5 A1 M1 |( f9 A5 p- Q- F4 vs 5 9 u6 o& L8 V* @' t2 ]2 {8 y

/ ?: h6 @7 D+ K4 c6 Qif 4=5 6 is the fake one # K) Q$ W/ s3 N2 L
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if 4>5  4 is the fake one
" y3 X8 R8 z8 R" m# S$ S! kand so on......................

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# ?# z, v+ S/ ]5 ~4 M7 k問題第二步
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Weight 1:  1-6> 7-12
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) ?# F2 a# a. X3 Z1 YWeight 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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========================================9 e; K; b/ v0 B( o6 G& ?- q; }# _

# V1 @  C* W( ]' p, l, h問題第三步
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/ w2 T* B* c8 V/ lWeight 1:  1-6> 7-12
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# @+ O0 }; D7 D/ v8 UWeight 2:  4-6 > 1-3
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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