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)。
0 K3 |) R% z$ @( C  _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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+ Q  [7 @; |8 m. p* B6 T) S- P注意:
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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
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% k$ D: h7 A. i' n! H0 S8 D) v2. 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" S) C3 Y  }/ n# w
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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:# }( I+ |% \5 w* ?
相信e條題目都有吾少人玩...

  S# f. J( a8 T我以前畫左個chart去答,, J: x  l) X1 r
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:' E( U2 X1 Y) K/ D
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我以前畫左個chart去答,# V. ]5 T! U/ p* t9 q
等我搵下...

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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:
4 [3 g2 E3 p0 o1 R% k: |) l2 L唔識隱藏...已經諗到..

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: P* x9 ?: t4 m9 X: I# Rsor !!!....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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% e, ?  @  B* \2 f5 }3 v6 Z! M" f[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: Y% u) G0 c7 i7 T
相信e條題目都有吾少人玩...

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9 V+ v/ E2 `# l4 t- a1 XPlayPlay, 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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+ v0 V9 n3 h# r* d% DPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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  T, B2 F/ d& S: \  P0 c* i4 sThanks

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9 S5 p; f/ b6 N( f! d7 A0 b* H- I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
- x9 E) u8 x. Q" a9 Iif 1-6 = 7-12     13 is fake
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1 x( ~, g& J- }& v0 ?if not
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" y5 n. P) ?, X0 lWeight the 2 time 1 ]( @9 u) c% A) [

! Q2 E7 _% q- [9 d9 gSuppose 1-6> 7-12
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1-3 vs 4-6 % F. |6 K+ a2 K" G9 L

! _$ M+ r0 q! a8 e2 \Then Weight the Third1 S& [# b9 h. T! V  Q% C5 u
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 9 X5 x( h# ~( Y

( T' d. x) i1 \: M% f/ Z7 xif 4=5 6 is the fake one ; n( D% U3 O  R) K3 [& w9 n, f

6 W: U9 I8 O+ h7 dif 4>5  4 is the fake one
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: {7 B8 p: c; W7 j9 V8 N, Nand so on......................

hello1997

分3組4隻波子秤
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  ?% O% o; S2 |  FGroup A: 1,2,3,42 |9 E) j( D$ z# t
Group B: 5,6,7,8
5 X0 E8 I6 Q5 y3 lGroup C: 9,10,11,12+ O, R. D1 N; Q
Group D: 13
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( i7 T+ B: `- m: n' JRound 10 b- x8 K$ _3 {- Z) x* m' \
Group A vs Group B& I* U% u1 C" m( v! i2 z/ N
如A and B一樣, 即較輕一粒在Group C or D. f  y8 P% D' Z$ ~5 {

1 S4 D% M/ c' T* B$ gRound 2/ x6 w; ~( o" N
再在Group C拆成:
" U# w$ C  N7 Y3 l5 S2 L8 Z" VGroup Ca: 9,10
% n% Y/ A" g* b! K9 EGroup Cb: 11,124 j0 k: l, g5 O0 p
然後再秤, 如一樣, 即13為較輕一粒.
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9 u* F( \# A/ O: p3 P如不同, 即較輕一組有一粒較輕波子在其中, ; n4 F$ s( m  r; C5 d$ i+ ~
要再秤, Round 3, 之後便知答案.9 o; `! ?6 q1 w6 K( E+ G
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e.g. #1 假設10為較輕的一粒
  [% i. r& P  Y3 yRound 1! l* M- R* n; O+ ~4 @
1,2,3,4 vs 5,6,7,8 = equal( j1 ]; D8 U  [( Q* L
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Round 29 `% }6 {0 Z. L4 `) B
9,10 vs 11,12 = 9,10 < 11,12  @5 U/ D8 N& F; r5 m  o" n

4 |* i/ K$ L# F) H$ NRound 34 c  U/ h6 T- A$ h
9 vs 10 = 9 > 10
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; p0 H- u# N9 M+ I* R* BThe answer is 10.
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( a+ R# N, o0 ^4 Te.g. #2 假設7為較輕的一粒8 B" \. Z% t  [( X0 ]
Round 1' O* @9 y9 o; n% K6 h! i8 V
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. l. M5 V. `2 U$ G' [& d" [
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Round 2
1 B/ X  A6 O+ d" n1 z5,6 vs 7,8 = 5,6 > 7,8  C, {- F' A- G, E: Y; k
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Round 3
5 }! {' @0 b9 T5 i4 G; X! ^7 vs 8 = 7 < 8# B' G4 s# ~( o8 q
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The answer is 7.
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e.g. #3 假設13為較輕的一粒% ^; ~6 A# j& [; Y8 d
Round 1
' z* o( e" M9 ^' u1,2,3,4 vs 5,6,7,8 = equal
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Round 27 Q* `5 g* B( y- h, j" F/ |% Q
9,10 vs 11,12 = equal
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No Round 3; ]) q5 t9 _0 `* g* P

/ r) d" C4 |6 ]The answer is 13.
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, v; |& p) Q2 d唔知我答得正唔正確呢?! 7 T, z0 q3 c0 b% M

( U2 M4 q0 u4 D) Q! {[ 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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, N$ {. H8 n# @( I3 l+ p" m& ]1-6 vs 7-12
* ?+ h5 m$ D; d# L5 tif 1-6 = 7-12     13 is fake
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if not + K" O0 P3 I# E: A5 v) ~% s5 d

/ o4 ?) X) [- m! vWeight the 2 time
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Suppose 1-6> 7-122 }( n5 k7 x5 m: [- Q

; ^/ \$ p) v1 t6 }0 K5 m2 p1-3 vs 4-6
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  |/ [) A/ Y0 wThen Weight the Third
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6 `$ Q0 ?0 h1 u5 t( o+ }Suppose 4-6 > 1-3. F/ x/ {) v- _! i" v- ~

; M% e1 a3 F  F, i4 v7 Q: NJust like the first Step
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8 x# g/ C9 \' i/ ~  Q4 `4 vs 5
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3 _, _/ ]/ Z* r7 U- [if 4=5 6 is the fake one 0 K* N2 k; g% u; @
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if 4>5  4 is the fake one
! @, P; @# u5 yand so on......................

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6 E8 T2 C) J5 C% o. b2 n問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6( ~' H0 U: R' f& o* Y- }7 F
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你第三步点去搵 7-12 边一粒???; |$ g) u5 z8 g9 w( Y  f0 u8 d

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問題第三步
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Weight 1:  1-6> 7-12& y/ u8 Q! k+ h8 w& W6 L; Z4 S
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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