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)。4 V' y8 c% b9 R; [7 c5 {* M
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？』/ c" j# R+ ]2 l/ h" m, ], [
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注意: ( u4 y, v& z( Q4 N

# b# s* ~" L- a0 _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0 J$ D$ i4 v* W! \3 n  h

8 c+ C: m% ^5 L- }/ M2 p' a: F5 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  , hide 字要連埋 , 內容 = 答案7 M: }9 W  L8 O1 B% Z4 B

  I4 Q7 @" T6 w+ Q" o: v' l& t[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
% \7 n/ o( u- U. h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,
3 B4 B* E/ D, D& S9 ~等我搵下仲在吾在; Q! g# F, e! l

8 P& n) m2 U; Y+ \, Z當日用左37分鐘答１２粒波子，差７分鐘才合格。' q; [8 y9 k  j! Q/ U! Q$ J& G
13.........+ e+ U* x5 @/ d- Z
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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,$ ]' T2 {. S* p8 [# R
等我搵下...

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8 F2 S+ u& ~6 A7 n" S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:' r: ?. g: b; Z8 f
唔識隱藏...已經諗到..

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  i8 F: W; t# M4 M7 [sor !!!....e加改左9 ~# ~8 q, S8 m2 j+ T

7 R9 L. T3 t- }+ [5 H: a5 Z2. 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:
" h7 h: n5 ^8 X& n% z5 q: E. `6 T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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2 S+ L; T' a7 P0 OThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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$ A7 v7 |6 ?$ n3 l% N- aPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 ~: t2 [" p8 u7 s5 }" B- V! R) N

6 L8 L. E- e( @0 x4 S& Z4 C/ \Thanks

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5 X2 _" A1 [$ }" u  j+ W2 p不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
+ I: F8 ~2 m* d& i1-6 vs 7-124 b* Y+ H' K! \' f' u5 I: g
if 1-6 = 7-12     13 is fake
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if not 7 [% ?: z( h9 S' F

, i- z% l0 H7 s( Y) T( y6 D+ OWeight the 2 time ; L# V3 w4 l* U0 k
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Suppose 1-6> 7-121 V  a2 S! t7 u/ b1 w
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1-3 vs 4-6 0 d, P' g; \+ s: |' M

" u7 v/ T/ Y6 }Then Weight the Third
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# g; e  p: s4 U) m" xSuppose 4-6 > 1-3
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Just like the first Step( q8 V1 _+ y) T0 N1 T  f
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4 vs 5
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if 4=5 6 is the fake one 3 E9 s* w% a0 m8 B9 V

$ N$ \$ C; m. f0 U  f  O4 r0 [if 4>5  4 is the fake one & m: w! P$ }% L+ _) d  u8 v2 C

# K% C) C; R6 f* e8 d% U) O9 d1 q* cand so on......................

hello1997

分3組4隻波子秤$ |& w$ j3 e2 [0 u* ]
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Group A: 1,2,3,4
- |# D2 Q- d3 U, W2 ^' h( oGroup B: 5,6,7,8
8 I* e& v* H5 A( S3 o: xGroup C: 9,10,11,12
0 u2 }: U& F) B# I6 X5 t, b7 |1 wGroup D: 133 Z& D+ X& L! Q7 c" o

; T: `# G3 b6 B* Q# s  U" [Round 1: n  W9 s# P% t+ ^' w
Group A vs Group B& N4 `& v$ D4 ]) N* a0 K- I
如A and B一樣, 即較輕一粒在Group C or D
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$ p' @# I" r; y1 B% jRound 2& s+ a! @7 B6 \- e
再在Group C拆成:8 s( D- i0 t3 ]9 B! ~' f; g
Group Ca: 9,105 J3 F0 C8 M1 P, I$ H4 i; B
Group Cb: 11,12) G7 x) i$ A4 S, H. A# l) Z5 _
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,
7 |# {& `$ w$ S' c: {* Q要再秤, Round 3, 之後便知答案.5 z" |* M) D1 ^; U# U

$ @: T  t% ]* M8 R% fe.g. #1 假設10為較輕的一粒
7 r4 o: G5 J7 `4 X: r$ H  ?& sRound 1
( R  n; a, p0 m4 v! n1,2,3,4 vs 5,6,7,8 = equal/ x2 l1 ?7 _6 q( X. L3 e

$ A  H6 ]! a" D) B  ^( t* gRound 2
. }! i0 ?/ n$ @9,10 vs 11,12 = 9,10 < 11,120 `6 w6 \: N/ h( v9 [

; [- Q# h' b' v" wRound 3
: q$ O, n- k- P. ~- r$ W; o8 ]9 vs 10 = 9 > 10# I' |' z6 s2 l2 }/ T

- W% Q2 b1 Q0 Y/ FThe answer is 10.
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e.g. #2 假設7為較輕的一粒
: z. ~# P2 B; _, f* Y" p% ], J9 YRound 15 X  F% y0 E0 |0 L6 e8 p5 D3 ]
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8) r* b/ J# A* ~' W

/ z* U$ @$ O2 E; f* T4 d9 {. LRound 2
8 c( Z7 @+ [8 y5,6 vs 7,8 = 5,6 > 7,8% q, x+ a5 E% m3 [8 ~- A

& |( E- X- ?* O" D  }- d& gRound 35 e0 Q) `5 Z, E3 H* z, V2 l" |- d
7 vs 8 = 7 < 83 c8 r( @  {6 i( k7 r

* n4 a6 n- l. B! zThe answer is 7.
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e.g. #3 假設13為較輕的一粒; [# r3 n) e% S- f8 A5 j+ t2 W
Round 1  ]  q' K  N: j2 ~) M+ O6 K* m
1,2,3,4 vs 5,6,7,8 = equal; [$ q6 m1 D7 ]$ {, k
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Round 2
, {- w0 c$ z% O) P+ j/ `/ ]9,10 vs 11,12 = equal& i5 t5 R- y- ]- o7 k
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No Round 3) r& q" B9 O% c0 Y1 f
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The answer is 13.
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唔知我答得正唔正確呢?!
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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:6 r3 h* ^/ F0 M, v' H
1.
2 S. w6 E" t/ N1-6 vs 7-12
  Z- p) I6 ~1 i5 X$ s) Jif 1-6 = 7-12     13 is fake
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if not 4 T) Z  X+ F3 v' A2 @. a  H
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Weight the 2 time ) A" y5 ~; o3 i
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Suppose 1-6> 7-12. x  c* G. D2 A" }* D! ~/ T6 B' J

0 l: |/ B' a# l. q1-3 vs 4-6 . S9 p+ \( h# ]: {- [' f1 R7 N1 v! a

: `9 h$ m0 C) [& _/ vThen Weight the Third
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Suppose 4-6 > 1-39 J5 L& H8 |6 h4 {4 C  z* D6 B" j+ B) f0 V
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Just like the first Step
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4 vs 5 , I5 _7 ]& ?$ G; b1 s

% R2 }( z5 t% F) i, p1 a4 v( i$ K- sif 4=5 6 is the fake one 7 p. B* I- E. I# q0 r4 q1 U% e
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if 4>5  4 is the fake one
: f/ j5 T( k3 f) x' u" P5 _+ {/ xand so on......................

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4 f# D1 Z7 ~/ t5 M" K8 q

! C* u+ f' ?. D$ \  h; B, l5 G) d5 B問題第二步
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Weight 1:  1-6> 7-123 U2 z3 D3 `$ \% k+ [( }( l$ q

! \" j1 s. j+ Y' K( ~0 ~% \+ HWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6# e) Z* i0 `- B6 g3 [
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你第三步点去搵 7-12 边一粒???( L- s9 G; z$ T6 G( y% e
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========================================
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! N! N2 g& d  N: J6 F! ~. y問題第三步3 ^8 u5 {( Z" Q9 b
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Weight 1:  1-6> 7-121 ~/ S) J" S; E# f7 Y! k7 P
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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