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# A5 P* j$ D: T% S

1 n: B# m1 L8 @$ r8 M0 S『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)。
- N( K1 b% ~' S9 k) v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？』7 C' f) k- Q$ V  p1 u. X  }
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注意: , A9 s' ~" w) D+ ~# M, p' a

1 W9 C3 w% I: w1. 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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0 Z6 F+ J! g2 o# E  A: t8 d# ]( `* z5 s2. 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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, m( z7 N  f3 h% h0 Q[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
: j0 C* @7 g8 o0 l4 r/ d# e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,
; t) _5 P% z) f8 _( O  B等我搵下仲在吾在# Y8 l' k: ?. G0 ~$ z; O0 v
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當日用左37分鐘答１２粒波子，差７分鐘才合格。) m* l1 ?- I  ?4 y2 V3 v8 F! v
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:0 g9 A& a" r* t# u9 {8 l1 h6 S
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我以前畫左個chart去答,
2 u3 s% v& F3 `" b4 a/ j7 Z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:5 a+ s) e& O% d
唔識隱藏...已經諗到..

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sor !!!....e加改左( Q$ Q) z' M* ~1 Z+ v

+ \6 a7 G' }6 ^7 q! ~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! \. k) b4 `8 w$ U, \+ J
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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:
9 w* q/ S7 x1 B( A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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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ B. K6 [- U; U. s/ R
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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8 V: W5 y4 }0 _# |+ M6 q' m4 KThanks

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' Y1 m- s! B, R1 m5 B不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
3 R$ t7 ~6 A4 V3 P" a; i# P% _9 M1-6 vs 7-128 g! H1 L( ^3 C/ @" Q$ L
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-12& N* I& |: s+ X

) G! `  y0 d0 W9 h* E* Y; s1-3 vs 4-6
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Then Weight the Third
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; T4 A. t9 v! }' fSuppose 4-6 > 1-3
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# @; p0 W5 l' F5 d6 |Just like the first Step& x' {5 E: N7 R4 |! i

9 H6 O* x% p% l) `8 r5 P6 I  W4 vs 5
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* k8 ~$ @, t) i* Aif 4=5 6 is the fake one ! z6 f  j  a  o" c# w7 x* H
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if 4>5  4 is the fake one ( z6 {6 A% S) C7 d' s4 W; q

! k8 G, K4 _  t& w  o& ^and so on......................

hello1997

分3組4隻波子秤, j- F% u' ]" b
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Group A: 1,2,3,4
* H* d7 G6 }& x6 M& _Group B: 5,6,7,8
- ^+ d2 R0 P# B' WGroup C: 9,10,11,12
/ _) v/ m- M! `/ a' u: |Group D: 13
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' v( v2 ?2 r' KRound 1
+ n3 L0 Y$ ^* q/ \* Y$ MGroup A vs Group B
: A+ @) ~$ q" a2 d1 p/ g' u4 n如A and B一樣, 即較輕一粒在Group C or D
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' N3 |9 @# H/ ]# t* V5 F/ v1 X6 \Round 28 z" p; `* u: {0 g! Q# o( R$ `
再在Group C拆成:9 g  G* i# `8 c8 `
Group Ca: 9,10
$ U% s, M2 M* _0 I3 j% x4 RGroup Cb: 11,12
/ H; j* K9 i$ v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, * H1 n0 g9 E' {- s) s! p1 B
要再秤, Round 3, 之後便知答案.4 r4 q( p, H5 {0 o3 f7 a. }7 x# |

$ A0 B' B! Z3 G" `$ s, e! y% ke.g. #1 假設10為較輕的一粒
4 _: |( r* I4 S# u3 _Round 1- [/ B/ s0 T( k8 g' L1 M6 X% A
1,2,3,4 vs 5,6,7,8 = equal
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2 r. L2 N; o! i; s! {" _3 k6 L6 KRound 2) d. `- _1 f, m$ x+ o+ w- W; ~
9,10 vs 11,12 = 9,10 < 11,12
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/ I. U2 k9 s- T; ~1 {9 `- eRound 3$ ^" g1 G+ z5 m* i. y
9 vs 10 = 9 > 10. S9 X& q# Z  ]; D* `% u
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The answer is 10.
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+ |0 ]9 M1 d" J8 ve.g. #2 假設7為較輕的一粒$ G4 V. T( f/ p( H
Round 1
( j: ^9 y6 v* D' {1 Y1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,85 \1 v( k9 t: ^8 r- {4 i5 B
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Round 23 G9 _. M9 s$ t$ ]( t
5,6 vs 7,8 = 5,6 > 7,8& r! h2 F1 }# K+ M7 e0 B

7 S$ |: M; |6 j5 P: X9 XRound 3: N) p' w3 p1 C+ D2 I
7 vs 8 = 7 < 8- x% a( m( _& \: W9 z8 E

  o& K5 T& q) p/ o7 f4 g4 v2 _$ NThe answer is 7.
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e.g. #3 假設13為較輕的一粒) k7 P) @4 b5 x4 U  H4 m
Round 1
& ~* y0 @1 F$ d3 P* N9 d3 G1,2,3,4 vs 5,6,7,8 = equal
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- G0 ~  l& Q' i) o' @' Y1 TRound 2$ x5 j* x! O. E
9,10 vs 11,12 = equal' P+ W" X# f" Y  J# Y1 y

) l6 G% T3 Q/ X8 INo Round 31 T9 T) b0 k( ~8 x: }

& H- a! E9 _" c$ _. C6 CThe answer is 13.8 U6 i* A0 K7 }, G$ P3 d0 g* h3 t0 h
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唔知我答得正唔正確呢?! ! W, \" q+ g3 @- A- {% m

0 b/ s5 v0 X2 E! }6 t[ 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
/ d7 ?9 a- C9 K% O1 |) e, `/ W  oif 1-6 = 7-12     13 is fake3 g5 M4 a* h+ V
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if not 3 s# X& C: P  a% T
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Weight the 2 time ; o  ]8 l" _$ ?, f

5 B6 X  g2 |' v; n) Q3 A  H; H( i& RSuppose 1-6> 7-12
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" y0 e$ V, x) l. F- c1-3 vs 4-6
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Then Weight the Third: l' T- N& f7 ]. W2 k  I
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" }' v. `7 q4 LSuppose 4-6 > 1-3; D9 m( G$ N% ?4 u$ {
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Just like the first Step& z$ O/ ?1 J, n6 J- ~0 x

6 m; f% o# e' R$ P4 vs 5
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, P8 k! r2 [) c9 J0 g7 Y+ p, N9 r, [if 4=5 6 is the fake one $ U3 M: K( [, `( c7 Z2 w2 E# Z

% @9 l# n8 q4 F" m% zif 4>5  4 is the fake one 0 M: J( y- t! ]* ~2 U# W
and so on......................

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問題第二步; L- v8 {. [8 y' Q' [
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Weight 1:  1-6> 7-12
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& S, ]2 E3 P7 {" ]Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, n" Q) M$ G  S% h0 N
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你第三步点去搵 7-12 边一粒???
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========================================4 Y) W4 \# s! S+ q5 A

  N) M& V1 G3 w7 L" L- q問題第三步
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Weight 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