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)。6 r9 E, i4 N8 ^3 o. V) p
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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! c( a# U$ ~" Z注意: / W& d, I. ?( ]' Y+ L

9 ?& i) I  x* m% O; j1. 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
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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:  B* L* e' g0 ^. ^. `
相信e條題目都有吾少人玩...

- i" \+ Q: u1 L' Q我以前畫左個chart去答,: p  q# |+ C) F. n( d. |; h
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。
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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:
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我以前畫左個chart去答,
: f$ z) m+ ?" M9 @: s+ F5 q  j等我搵下...

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8 B8 u& C' \5 Z4 L$ l! ~) h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:
7 v8 d: d9 \$ D5 P唔識隱藏...已經諗到..

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" n, ?0 ~2 k" A7 u( T" K. ksor !!!....e加改左
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3 [& n" `6 _- g0 _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- C  h# |( @/ r% @' D% ?# e/ L
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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:" q0 Y# \, ~) \& A. \7 ~: a. C/ j
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.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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, k" ?0 t# W$ C! A! Y2 uPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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

1.
* m) l5 W. c: b6 X$ k" U0 Z1-6 vs 7-12
: X1 _% p, r  n- ]if 1-6 = 7-12     13 is fake
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Weight the 2 time 2 }. Q( y( l. R9 K. F/ h( }

9 Y! r- H  G' W" J' D& `Suppose 1-6> 7-12
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1-3 vs 4-6
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/ B  {# r7 }& u; ~Then Weight the Third
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; Z9 a; ?/ c  b$ y" Y( zSuppose 4-6 > 1-3
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Just like the first Step' p( L: A. G) K- o% M' Z
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4 vs 5 , ^$ E5 m3 ^+ S! ?6 N

+ e- }# E! `6 E) t8 C1 aif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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6 ~# |2 R( X% m% Dand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4. F2 J$ h5 o# c* W2 D6 n, s. G% L
Group B: 5,6,7,8$ X# d5 O3 g# T, o: y$ F9 [& k
Group C: 9,10,11,12
9 O6 y' U8 p$ D5 uGroup D: 13- ]9 O. D3 x1 ]+ l" I- \% i$ `. c
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Round 1& c0 z0 h( n# ^- [3 z" B; ~
Group A vs Group B* M* c4 z7 @  F8 ]  W0 O9 ]: o% o1 c
如A and B一樣, 即較輕一粒在Group C or D0 {  X5 g  [8 a" ~) E% i& n
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Round 27 i; }6 k* X, `0 N
再在Group C拆成:
* w9 I! u4 r$ R; K7 z: AGroup Ca: 9,10
# f! ]4 G) a+ u$ q! dGroup Cb: 11,12
" M1 r7 [+ ^/ W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,
, K2 l' w1 o, w* P( X" ]) Z要再秤, Round 3, 之後便知答案.) L1 E# }) P" G1 @* F, s4 j
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e.g. #1 假設10為較輕的一粒: l: U- S5 ?0 ?) z. G& w! m
Round 1
! R6 M% g5 _& w6 ^1,2,3,4 vs 5,6,7,8 = equal* s. C0 K0 u. o/ ^* R# h3 M+ u

* E0 w+ x2 w+ ^Round 2$ t  A5 u9 [6 B% }4 Z
9,10 vs 11,12 = 9,10 < 11,12% K- V5 X2 z( P+ P* U9 @3 Q

" H. W+ K4 x; C- l) [% H) ]Round 3- P0 e# J* B" v$ u% c/ X
9 vs 10 = 9 > 106 C/ P# C. |5 s9 a$ ]/ Q+ M
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The answer is 10.1 m7 g+ W% O% S& d) J5 m0 P; X  K( d
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e.g. #2 假設7為較輕的一粒" g: ~9 f7 X9 U, J! g" k
Round 1
( ?. H  m' A+ b2 O! Z( {9 K1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2% }2 i4 Y! U( i0 y& b
5,6 vs 7,8 = 5,6 > 7,8
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Round 34 X1 f3 z# f  [9 ~6 f: o# t6 L
7 vs 8 = 7 < 8
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( o! {) D" o- k6 v: B* OThe answer is 7.
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0 `" V( m* X  z1 we.g. #3 假設13為較輕的一粒
' G* B- f% p# g" k/ vRound 11 L$ n3 t) q9 k( A
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
+ O9 I1 S4 z) U& l9 C0 S( _( O9,10 vs 11,12 = equal
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/ h7 w# y+ f5 T8 y2 TNo Round 31 v8 P0 S2 u$ {. a, U' f- a' O
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The answer is 13.
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! Y: d4 N6 z8 p2 X/ m8 |( @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:; C# ~3 ~: [/ L6 p1 F. g0 h6 _
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1-6 vs 7-12% z* [2 f/ N3 ]& i( f3 O7 N
if 1-6 = 7-12     13 is fake+ N( K1 D$ [0 E

4 w! A# N+ w$ M% |" [- r( s: iif not
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Weight the 2 time
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Suppose 1-6> 7-124 ?9 H8 {5 u$ P3 d0 ]- @3 Z6 `
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1-3 vs 4-6
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Then Weight the Third2 r6 y8 X' v0 o5 |+ {7 g
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8 H/ v* ^/ C  e1 w" T" K- kSuppose 4-6 > 1-3# a# s9 T% o! n7 D& {4 q
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Just like the first Step0 v3 @0 S+ n% {

% y1 K; }) \7 j  G% h  c4 vs 5
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if 4=5 6 is the fake one
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8 _3 |+ J& ^% E! ?% uif 4>5  4 is the fake one 8 c8 V+ e7 D. ~. a+ n  m+ u! O+ w% j
and so on......................

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' Q4 v" a8 t# L' g問題第二步
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Weight 1:  1-6> 7-12: Z6 e- b" E6 l2 [0 b
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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( C4 t. m2 M7 @4 G. a; f9 ~你第三步点去搵 7-12 边一粒???
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問題第三步6 \; z$ k# l! l2 w: E. B

" A, C' v* t1 l8 p0 TWeight 1:  1-6> 7-12
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Weight 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