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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% s. G8 Y! V% U0 k0 P/ G. p: R『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)。0 j$ T4 T) ?. O* R* [4 ^
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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+ \: ]$ y0 ?* q7 N* |9 q& W) K注意: ) w; `. K& P& H2 S7 z% i

' ]' n( E6 r& I' s  h1. 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:( |; D" s! P2 J' w3 l( G  r+ `% \/ a
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,
8 {7 w  E/ H4 q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。  ~1 u" A5 N2 {2 C) }8 a# B/ u
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:
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我以前畫左個chart去答,) A( g7 h9 d- U2 K& i$ u3 z
等我搵下...

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) D) S4 Z9 ^! Z5 r# V4 y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:
" A+ x2 T, B6 ?4 a* Y2 K3 ^唔識隱藏...已經諗到..

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: p5 e: N; o3 ^( @8 e' Asor !!!....e加改左( [/ ?+ [" f3 _
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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$ S0 r, i! Y& ?& T3 k, m0 U
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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:
% u1 k/ e/ @) V% V- o# l! t8 \相信e條題目都有吾少人玩...

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" |& o; Q& d% R- g3 p; C+ hPlayPlay, Let me know later who has the right answer and I will add points accordingly.$ c. K, z- t0 F0 a" S3 M
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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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

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1 m( w* J, A# m* X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
5 K) N! a9 I- o. ?4 i! U7 G! Cif 1-6 = 7-12     13 is fake! R; ~8 g) r1 y& F! S; s  G& m% Y
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if not ( b9 l- V8 _$ D* n& @7 T) i
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Weight the 2 time 6 v; q" L4 {4 Y" M  o% E

! s& S, S+ G. e+ M. B* PSuppose 1-6> 7-121 V$ y' a- c# H' N* W7 V3 H
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1-3 vs 4-6 * k+ d, A( Q% W' h

: I, f) Q  s! c6 t: [Then Weight the Third( e6 \, d- G& a' i
3.
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0 r4 C; o  {, w8 rSuppose 4-6 > 1-31 Z* G4 p; C) Y; b2 m& ]
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Just like the first Step
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4 vs 5 . i1 Y6 G" p( t$ |/ |" p
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if 4=5 6 is the fake one - o- ?# J" O+ x2 s

4 K$ C6 ^4 v8 A% ^6 d% }# n) e+ mif 4>5  4 is the fake one ; `' V. f, J- e& l

: e7 X& x- E6 f% Wand so on......................

hello1997

分3組4隻波子秤/ C+ O" w6 O8 A% i9 q- O
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Group A: 1,2,3,42 i0 ~9 k( o! }' U
Group B: 5,6,7,8
+ H! Y0 g/ Z4 ?: K# [Group C: 9,10,11,124 H, P2 P4 H, ?+ M) i
Group D: 13' h: u% U* z, I# s( [5 M

3 o; Q$ Q- f5 @. |( Z1 tRound 1! b% h& R4 A' a) f* p% i
Group A vs Group B
' H! K4 q2 k4 C) \- Y$ D如A and B一樣, 即較輕一粒在Group C or D& R8 W2 b2 R+ j6 g+ B
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Round 2( {0 I" _5 Q) {
再在Group C拆成:" ]3 s, I$ z6 H/ W
Group Ca: 9,10
9 X- \  h7 _/ o& ^! o) h: s2 C. ?Group Cb: 11,12
) O1 o0 C0 q9 {* T2 k然後再秤, 如一樣, 即13為較輕一粒.+ O9 y5 R! R! g; v+ x) ~

" [/ R4 t) Y8 z* I, }' s如不同, 即較輕一組有一粒較輕波子在其中, ) R* W. i% m2 @$ Q" U4 R3 y& x
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6 [$ ?& T) k( w' W; d6 A8 \
Round 14 w: A( R7 k. D2 d
1,2,3,4 vs 5,6,7,8 = equal
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Round 2. C# h* e! a5 m. m( s0 h$ c  K
9,10 vs 11,12 = 9,10 < 11,127 w" K5 J% N" p7 s
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Round 3
0 p# t+ A/ T. M; D" Q7 D+ h9 vs 10 = 9 > 10  J& B( z' D( d2 C$ p' R6 k
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The answer is 10.2 W2 x  ]+ N* v/ j* {) Y; {
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8$ z( v6 A. ~8 b# @0 H* ]
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Round 2
+ b8 \: j7 J: F1 Y* \% k  M: S5,6 vs 7,8 = 5,6 > 7,8
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7 A! N" O0 {; v$ |9 J2 XRound 35 v8 ~. Q- _1 ?1 O* v
7 vs 8 = 7 < 85 z# V' S4 {2 A' S$ s  l
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
: M6 Y4 I* i; G* O& b" @: |Round 11 Y0 p$ p0 x* U, D# V
1,2,3,4 vs 5,6,7,8 = equal
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0 m5 h4 ]/ V! h7 FRound 2& X: n% K' S" E( b5 q# `
9,10 vs 11,12 = equal+ y8 N# N$ z2 [* u
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No Round 3
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  h9 \% e1 [) E5 C0 g' y2 J  JThe answer is 13.) m; L; F' O' V' N# Q) }( X  ?/ n

- t8 W- U3 U1 w" U唔知我答得正唔正確呢?! . `. J4 a! u  U9 r

, _- I, F3 d! v$ X$ K1 E1 A[ 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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! a. e" [, [; T8 r$ P; V+ r1-6 vs 7-12
8 J- c6 H- Z( Oif 1-6 = 7-12     13 is fake
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if not ; m: S% j' N% O6 n

9 J: D% @. u. H5 r; D  pWeight the 2 time
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' Z4 V* E! V2 jSuppose 1-6> 7-12; [: S7 M: m1 I  t- z' ?7 ?0 ^- @# ]
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1-3 vs 4-6 7 t( p7 s: d) p+ g
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Then Weight the Third
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Suppose 4-6 > 1-3
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; B0 ]9 R  S5 k. KJust like the first Step0 A0 ^2 e9 K, ], L

. R# A! f* }% E4 vs 5
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if 4=5 6 is the fake one
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& X) `8 o/ j  E9 k. W0 Uif 4>5  4 is the fake one
/ M  t8 f) U' d0 J0 E% Q2 g4 xand so on......................

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問題第二步
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) n+ Q4 h. q: f9 @Weight 1:  1-6> 7-12
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6 N; L" @; G2 i7 g6 e3 FWeight 2:  1-3 vs 4-6 , if 1-3 = 4-67 P0 W) L1 }. S+ @6 j) r
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你第三步点去搵 7-12 边一粒???- y8 q' K9 \% g# g  ]

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問題第三步# i7 U( j" ?$ n

( j. A9 t; d" ~  B7 `; s2 qWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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* p% D# u* E) T. z* 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