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)。% {% q: t; N6 c7 u0 ?
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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注意: ! n7 c. G) X- m5 a7 V
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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* C7 A0 K3 b0 ]" t  C7 F* P& x7 ^

& W  p/ Q2 j  }; n2. 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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6 f6 H/ c9 G1 D, q- z  x[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:4 G" J# }7 Q) P; |3 z0 w
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,
* F% l- [8 l7 l& G7 i- U! i等我搵下仲在吾在( A# W$ R4 O2 c& d2 W$ S
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當日用左37分鐘答１２粒波子，差７分鐘才合格。5 W. l* x! m+ |8 q, L- G
13.........
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2 o( I" m& M& Z4 h6 X[ 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,
; N  O: |0 I! H7 ?6 ?" q, r等我搵下...

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# M8 C/ I) t( \9 Q& T9 p1 `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:
- F# Z; V% r/ [% \唔識隱藏...已經諗到..

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sor !!!....e加改左
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9 s0 l* W3 Q' F2. 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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3 u: ]# D8 |# j& Y8 q. E: [[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ o1 R& u! O: u  h" B* H; A& u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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' Q1 I7 B0 h$ N( Y5 h$ vThanks

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., x3 K7 g: j4 u+ e, p: o
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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.
- G9 l( r. Y9 G/ {! S6 U1-6 vs 7-12
4 p! Q" L% t$ d9 \$ g5 D: A. ~# ~. fif 1-6 = 7-12     13 is fake
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; |" d% y# L9 o# M* h; [if not
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6 k/ H. K  f4 E; n2 {Weight the 2 time
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Suppose 1-6> 7-12
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( o7 M! b8 A6 m3 h1-3 vs 4-6 4 \# L9 _; z6 I8 Y/ L* X
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Then Weight the Third  N/ l: M+ H/ }  ~# I3 V' E* y
3.
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9 G" a, p1 |' Y3 R1 L$ D$ BSuppose 4-6 > 1-3
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9 t: I- \: E4 N) ~, Y* R" UJust like the first Step/ K% |! v/ e3 E+ f1 D' Q, B
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4 vs 5
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* g  a7 ?3 Z1 r+ P9 s+ }6 }& Dif 4=5 6 is the fake one ! k1 }4 X. S& f9 z

" z- f- w$ Q) B4 c3 F# k( \if 4>5  4 is the fake one 7 J6 I( I' T; V/ r" g, u

- [; c8 u. |0 E: T( H' O0 s! jand so on......................

hello1997

分3組4隻波子秤% O6 a  N" P% q6 ~2 l
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Group A: 1,2,3,4- q8 @+ j8 H1 r  W4 J3 y7 `+ _- t
Group B: 5,6,7,8  R0 b! X) {' O
Group C: 9,10,11,12
/ c* z- h5 y% {  _& _Group D: 13# r" \* |" W- [

  m  M4 D3 V3 n+ rRound 1' k& `( u0 N- b5 N4 z
Group A vs Group B/ |8 l$ Q7 F5 i" r4 C, j& H
如A and B一樣, 即較輕一粒在Group C or D
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Round 2* i- w; S" o  h6 X0 b# w' m
再在Group C拆成:
/ A7 q( y5 }: V3 }) UGroup Ca: 9,106 g7 f/ C9 V+ u3 o) q
Group Cb: 11,122 L- F0 e* j2 |6 u& h4 a  Y
然後再秤, 如一樣, 即13為較輕一粒.
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7 f/ }+ r/ R' t4 D. n' A. s如不同, 即較輕一組有一粒較輕波子在其中,
9 y3 _- M( V; t* _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
! ~( z# L  P5 r6 H6 z- e1 oRound 1
1 V( x; {$ ~7 ~; ?$ h1 P$ x: g) |1,2,3,4 vs 5,6,7,8 = equal
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0 I5 p) x' i' g& A( t# wRound 2
" q, H4 j) y3 z3 Y9 P: f) H9,10 vs 11,12 = 9,10 < 11,12
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( n; J; Q& O7 Z; ORound 3
$ q1 {2 U' R- l: [. P9 vs 10 = 9 > 10. C( F7 b2 _$ J6 P' v

) q7 C2 E' A! |. Y+ I! iThe answer is 10.
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, l/ ?, f8 g/ m- _# f% Be.g. #2 假設7為較輕的一粒
' |3 S! h. ^7 Q+ XRound 1
7 |' w- I1 \1 D1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
8 G( _0 O! [+ W- L! {4 Z' S' k5,6 vs 7,8 = 5,6 > 7,8' i2 [4 S6 p0 y% G$ u( `, @  L8 b7 T

  A( z2 f, i& KRound 34 o; _7 z0 ~0 m" `- j
7 vs 8 = 7 < 8
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% r" R; X' A6 f" p7 D4 m9 {The answer is 7., D. T  j1 U" `* W1 u

5 ?) K& U: s, [" J- Y$ ze.g. #3 假設13為較輕的一粒$ X5 G: x8 X- n# `" w
Round 1. B/ v6 J# }8 {3 v$ X5 J/ Q5 A' M8 b
1,2,3,4 vs 5,6,7,8 = equal$ B8 o2 [0 e& z  ~/ E

5 f/ o5 Y$ u; H0 ?. t4 `Round 28 O5 }, ~- O9 b* z# V+ W
9,10 vs 11,12 = equal- n! V" i8 ^! ]8 T$ r" A: v

' E# s( B% k, pNo Round 3
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The answer is 13.
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4 m) ]0 _! ]3 K" u% \( g) \唔知我答得正唔正確呢?! 7 d7 N+ l. ]1 d
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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:! u9 M0 o" G- ?3 `/ N8 p) @
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1-6 vs 7-121 R) k: G! w* [  l: K
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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9 @9 J# G' ^/ W# W2 SSuppose 1-6> 7-12
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9 E' O$ t2 X5 f! r1 [- D3 @1-3 vs 4-6
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Then Weight the Third$ X- m6 Q: G" c! g. K
3.
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, n2 r" y5 ?: zSuppose 4-6 > 1-3
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) m4 P: _, X7 K/ K4 Y6 `Just like the first Step
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4 vs 5 / R6 v6 o) `2 P  X( |, e

# W7 E  E& A! t1 Y0 _  `if 4=5 6 is the fake one ; L2 c9 S7 C* X/ V

6 ?# X. ^) M0 a, L/ t. bif 4>5  4 is the fake one
# g, U. L6 D7 @) Q7 X% band so on......................

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問題第二步" X* ^7 H* i+ a; @3 w7 k$ C9 f

& H% r- u* Z5 D# NWeight 1:  1-6> 7-120 `/ n. q" e* o0 S' U- {
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6+ B8 c! z% S  r1 n

6 B  q9 K0 H0 g! h, P8 l( j你第三步点去搵 7-12 边一粒???
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, X9 D. w. U# W* X$ Z" f2 m========================================! g! U1 [8 Z6 B% d; X

7 W  k  a$ W# O+ D% n/ ?問題第三步2 ~+ c9 |4 x5 A5 u4 t2 \9 C5 r
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Weight 1:  1-6> 7-12: h' o8 j* a( E/ {" n; M
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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