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9 Y6 b5 _  H. W, t# f/ }
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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)。
$ r& \, N+ F; F! S* i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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  i, [$ _* }8 z; u( }/ t) ^注意: # k$ k  \( @; Q. F/ U# |
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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5 C( V$ d# D+ F# r/ A: N

8 L! a# q5 d! [/ b) A8 ^/ [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:
) g4 C1 y* L8 n( a相信e條題目都有吾少人玩...

5 S* \3 ^. \9 p+ a, R$ f我以前畫左個chart去答,8 w6 U/ V3 S( W. }" \8 V
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 X7 t/ r1 {$ o) z. z/ R
13.........
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: h. b$ [0 T: s4 t! |0 H0 |' i/ E[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:( G/ Z$ D: R& g/ ^  R
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我以前畫左個chart去答,
" Y; ^% {, W) H- _' B' W" K9 l等我搵下...

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8 t2 g8 o2 Z, l; K% v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:& Y) a1 h) \' W" y  G
唔識隱藏...已經諗到..

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sor !!!....e加改左
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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
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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:
- |4 Q8 E$ n) r3 {7 ?: M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.. D3 v5 s% s% _1 V9 j

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:3 P, \# s  E" m) S$ o, Y# M6 L

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& R8 A% I. P4 U8 p9 N# r5 |PlayPlay, Let me know later who has the right answer and I will add points accordingly." ^/ L. |/ I* N* X+ I. r6 L
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Thanks

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  [* Q: D9 Q0 b% a- _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
3 E! J9 O8 H* B5 J3 Nif 1-6 = 7-12     13 is fake( z* o7 M' W0 l5 F$ q; _" J

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. ?! N  z* [" n" J# |Weight the 2 time
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, F& x0 o# S- E$ YSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third7 `$ O; u! y: i& c
3.
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Suppose 4-6 > 1-3
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- n  a- q+ A0 `& m2 a& MJust like the first Step
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6 Y' V. j, [# I* [: m& `& A6 D4 vs 5
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if 4=5 6 is the fake one 5 D7 n# d; Q8 K1 U# {  \2 l
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if 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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7 R8 X. n1 z. y6 W4 ?& g5 _) aGroup A: 1,2,3,44 n( N8 K. o% R5 o7 b6 p
Group B: 5,6,7,80 w; K. c2 R' A/ o
Group C: 9,10,11,12* S7 O/ Q5 i: K' a
Group D: 13
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3 `+ r) S; G0 h! kRound 1
1 R* B& ~. T- ?5 f  k2 q9 K& PGroup A vs Group B9 B$ J9 _, M5 K) I
如A and B一樣, 即較輕一粒在Group C or D
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Round 2& l2 Y; h- Q. a; D9 ~: K
再在Group C拆成:3 g: S4 k+ g/ E, T4 d) X) @
Group Ca: 9,10
: Q& v& f) u' U; fGroup Cb: 11,12
5 s, h; A  m* L! O1 C然後再秤, 如一樣, 即13為較輕一粒.
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/ F( g$ Q7 n0 d' }: h" g如不同, 即較輕一組有一粒較輕波子在其中,
3 E" v0 R( g: M+ \) b% e% _# h6 Q3 c要再秤, Round 3, 之後便知答案.+ h% P! U& c& y$ K0 S9 f7 _2 T  H+ m
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e.g. #1 假設10為較輕的一粒
! Y" H3 m- `" u8 tRound 1
/ S) T% W5 `: c: w0 ]. N1,2,3,4 vs 5,6,7,8 = equal4 v: J7 }( \- o( v" M9 g+ t4 _! u4 o

/ `3 g& k9 X9 k+ f! d& KRound 2; |5 |6 K) {& G6 f) B
9,10 vs 11,12 = 9,10 < 11,12
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& Z- d- w: v! ?; j) ?9 S' D- h/ wRound 3
0 T- W# e% q9 L9 vs 10 = 9 > 109 C, h2 A- |) O( Q& |9 f" ^1 J6 M
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The answer is 10.
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e.g. #2 假設7為較輕的一粒9 w/ f( T1 d) v7 i8 n4 h
Round 16 T2 _( ?& i3 o" F, r. ]; E
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 25 I' ~- B/ Q& J: F* H3 ^" V. L
5,6 vs 7,8 = 5,6 > 7,8
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1 G1 ^& W. M; }/ vRound 3
0 z" ~' j! D8 P$ B# I6 u7 vs 8 = 7 < 87 `* R$ [( \4 M" `* u0 `# Q

; M4 g2 W/ X4 h& B5 R# fThe answer is 7.% w+ S% z) X" X+ \7 f1 I0 O9 U
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e.g. #3 假設13為較輕的一粒: Q% U! @) m" h! F" _# U0 d- v
Round 1
5 _1 d0 ?( J* Z  x; g) b& K1,2,3,4 vs 5,6,7,8 = equal
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: o! |0 {" d5 `( B7 J! {  T  QRound 2
; C. @% D$ X3 ]% D. Y% k$ }9,10 vs 11,12 = equal5 ^5 K- X5 @4 Z( w+ I) q0 U
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No Round 31 _8 u  |  F% w3 u, I! s4 O( m
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The answer is 13.4 @9 ]* b. v% I
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唔知我答得正唔正確呢?!
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7 `8 ?5 _5 C5 v/ P6 w" y) g[ 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% F) V, v) A, Y2 @
if 1-6 = 7-12     13 is fake
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if not : k. y& V2 @' R8 `  ^& \! \- q) m

+ H( ?! O2 V/ B4 I' l7 tWeight the 2 time
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# e1 t/ Q, _6 O8 X8 _Suppose 1-6> 7-12
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8 P8 Z9 F7 Y& V8 _, G1-3 vs 4-6
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$ L' M+ V  ^- ]# {Then Weight the Third
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Suppose 4-6 > 1-3" Z) S# q6 N% e, j7 I
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Just like the first Step+ y3 m1 Z4 Y# W2 j# {7 l
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4 vs 5
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( f* _$ D/ {/ K5 T. z6 @if 4=5 6 is the fake one
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if 4>5  4 is the fake one : S6 c" T6 Q0 Z3 x& ]. |
and so on......................

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7 O4 }+ ?% ], O- V& m* a3 K9 e問題第二步
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Weight 1:  1-6> 7-12/ k$ e6 u1 p4 J& H
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6  L0 W7 ~3 p  r( @1 Q& \# C
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你第三步点去搵 7-12 边一粒???
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========================================5 G5 A( `& t9 i2 D! X! Z
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問題第三步# Z: d$ m6 C% r4 E3 w
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 8 a8 n5 d0 A2 v: j1 v" J& _$ Y1 C1 H

# X" C& E  M3 E6 o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