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8 v7 [! F& R: T" f2 b
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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)。
% F/ [& I+ {) J- V. ]0 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？』1 K, a' _: N2 P3 e/ S
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注意: ! R4 y  h# {- [6 e

+ ^, D- N& Z) v. L9 l5 ~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% t' ]7 X: Y2 S8 O' d
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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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! o6 x9 C* M: j0 q7 z+ |[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:- {0 e& v$ U8 ?. G: F; V7 y6 G
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 C- M; `# B  j7 A$ W  s等我搵下仲在吾在
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, H0 V8 ?+ C' B- T* ?( @當日用左37分鐘答１２粒波子，差７分鐘才合格。' O2 z4 t& f" Y
13.........
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* p/ o! {7 a4 x# _+ J& q$ ^/ z! B[ 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," ~% v, @. B$ x4 V( l
等我搵下...

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% _  b; v, F, M5 o6 @0 U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:  g/ D2 ?3 w1 Y" k- a; p
唔識隱藏...已經諗到..

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5 D6 W2 n  i* ?3 v" Xsor !!!....e加改左1 l% C# y8 W- D  l

5 c' F: t8 H3 _& R2. 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# z) i9 Y+ Y" W

% W) g. s0 ^# E" ]- b[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:! @6 Z; A( U% `' H2 r, J' y
相信e條題目都有吾少人玩...

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/ e+ M. B, N. a9 \  R8 QPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' c0 i, u7 d1 q/ u8 Y! k
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: _4 [" j2 b0 G3 y" y* APlayPlay, Let me know later who has the right answer and I will add points accordingly.( T# L6 g) O# ?* q' X' y' F  o
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Thanks

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1 r# K' O. x  _4 Q8 k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
9 W3 T) U) r. ^( B* }' L8 U& wif 1-6 = 7-12     13 is fake
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1 [6 |: H" f7 S% ?2 v$ O  Mif not . y! `9 Z; F; a7 Z# R/ T3 S

% n5 l& D# H4 h( c; ~Weight the 2 time
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1 j/ u! D7 H# @/ Q7 J( pSuppose 1-6> 7-12
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1-3 vs 4-6 - D, V( ?  F. F, R

8 C9 l2 ?2 w4 J; b8 B# OThen Weight the Third
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& ]/ w# |" A" O8 rSuppose 4-6 > 1-3
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Just like the first Step3 {% `; {$ ~+ M, x$ _1 b
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4 vs 5 ! Y# N5 H5 _1 x

9 U# @' U3 ~) a2 s* Tif 4=5 6 is the fake one 1 |5 g( K& W% l+ {; p, a- p

' o' n# v  d- d4 f" uif 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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8 |2 R0 w2 J: t* G5 {Group A: 1,2,3,4
+ C" e8 u( r( ~7 r) G' HGroup B: 5,6,7,8
+ O5 Q5 T! x, v' Q# V- _Group C: 9,10,11,120 v* E- e% N# n2 z" d) j& J
Group D: 13
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7 D% y  \: a: x  w0 z; U% IRound 1
8 N# k% |* B- d/ C4 VGroup A vs Group B$ X; Q3 k; g' {' D1 L
如A and B一樣, 即較輕一粒在Group C or D% r/ C$ |" `. d

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+ b) M* V4 _2 \7 ^8 p$ ^  b再在Group C拆成:
; D- q2 P- t2 m, J) y" v- NGroup Ca: 9,10
# P: S& Z* l9 q9 _7 e) [Group Cb: 11,12
/ @' s  U5 K- p* A然後再秤, 如一樣, 即13為較輕一粒." {* L+ h' W1 u& y/ R

, z$ }- L$ |. {' M如不同, 即較輕一組有一粒較輕波子在其中,
) V5 e- m) B8 h" t- L( H5 D/ c. t要再秤, Round 3, 之後便知答案.
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: B+ K  I9 x) D$ k0 f* we.g. #1 假設10為較輕的一粒- S; O& V+ X$ \0 N, y
Round 1
1 E9 a" w0 S, G7 q# O# ~1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( t, {/ @3 L2 w# y9,10 vs 11,12 = 9,10 < 11,12
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6 B: b* q. l+ T! HRound 3/ n; u$ h, f# h% ?" r- E
9 vs 10 = 9 > 10' Y/ v# y4 s. {2 K4 W
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The answer is 10.0 E" f) }0 W% ?* Z

, W- i( u" O; K3 b" j+ ae.g. #2 假設7為較輕的一粒% ~4 y! Y" I. K0 }1 ~* R
Round 1
% W7 @; o2 D: K9 t- {1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* ?# N2 q0 L2 I7 g7 a* o& m6 K# I. P1 u
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Round 2# K+ H& T6 Q2 Y7 ~: D: y* |+ m& \
5,6 vs 7,8 = 5,6 > 7,8# i/ _) n; C  I' K/ Z

  X# a) a# F9 p) ~2 mRound 34 t+ C1 |7 W" V, y6 D2 v4 F
7 vs 8 = 7 < 8- J5 Z$ C. U8 P7 B# E
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The answer is 7.$ _5 Z" N, L& Y0 q& d5 t9 P7 _" Z

& \! w: C# u; {e.g. #3 假設13為較輕的一粒8 I  B' F/ j, [6 R5 G' ~
Round 1
$ Z0 A8 g# y/ f+ |1,2,3,4 vs 5,6,7,8 = equal$ f+ W+ F/ z( h& Y1 K
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Round 2
. F+ M7 g4 I: g" v1 v4 ]' W# A, T8 F9,10 vs 11,12 = equal
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No Round 30 o$ e3 Q3 F6 j) p5 E7 l( f

$ N) i  w6 H- w" [1 mThe answer is 13.
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! Q, E7 s& z. L2 p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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1-6 vs 7-12* e9 l3 ]+ J( M2 q; r
if 1-6 = 7-12     13 is fake9 M$ V. I; {) L  ]  F% y

6 Q( y6 V$ G6 Hif not 5 O: W, `$ Y5 d0 i$ w2 O7 ]

' o" R( p+ j& ]5 Y0 |) oWeight the 2 time ( h0 I8 V/ q! }' n
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Suppose 1-6> 7-12
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7 `6 j3 r! G3 H" ~1-3 vs 4-6 1 v& B. h$ m5 U3 {
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Then Weight the Third
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Suppose 4-6 > 1-3. S9 @2 E; Y9 @& F2 O9 U* m7 t% G& h$ i
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Just like the first Step- l2 R+ q& }! Q. u# E9 P
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4 vs 5 9 g/ e2 t& Z0 ?
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if 4=5 6 is the fake one
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+ d( I% Y& c9 F; w+ Iif 4>5  4 is the fake one
6 G. B6 Q7 l+ H/ ~and so on......................

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$ e1 r2 A/ C' Z; p# ?  x. q問題第二步
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0 E% U2 H" `/ B/ ?  j: V& lWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6: G9 P. _$ t% j9 t5 k; c4 Z4 E- D' u

9 c& U/ d' j. d' \你第三步点去搵 7-12 边一粒???7 \  I1 t# ^! l* j. n$ c8 ~! Z8 y
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========================================
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1 B9 L; q" O* u問題第三步( o2 S. n- [9 o# m$ M
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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5 S' l- S% i0 X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