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" q# C# o; E" u) o( _* ^

5 U' P; S2 h. E5 [' X! p『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)。: N7 P' R" R& x2 T! o& s
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？』, B. [8 h1 n! [4 W$ f" k

0 }' \2 L1 Q" Q0 j- h2 J注意:
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" R  e. \, F  U% I1. 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9 L0 l$ g2 O( j7 Y, }4 m0 r
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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  , hide 字要連埋 , 內容 = 答案/ |9 W0 w, G- b
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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:
( y8 w3 E/ Q3 V. x. V相信e條題目都有吾少人玩...

/ X' B/ V9 W& s4 l我以前畫左個chart去答,
* P: }+ [' k  y1 t* _# M  @等我搵下仲在吾在- f5 A7 P. w0 K6 _1 C9 v

- g1 a# B% R% K+ m* N2 m# s當日用左37分鐘答１２粒波子，差７分鐘才合格。
  U2 t- x: J: J' H4 O  C13.........
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& Z  p, S; B7 p, @- S& O& v[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:3 ]) K; ]7 b1 k! T" ^/ @) R
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我以前畫左個chart去答,' j$ L" n' C6 B1 F
等我搵下...

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' [5 n( \9 m' h- M3 _( v0 _3 l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/ E6 m/ D" l8 j/ o: \- ]唔識隱藏...已經諗到..

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8 @6 X; N" e, s6 S. u: csor !!!....e加改左
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, s& ^2 v! i# ]( g: b7 b4 b2. 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:
) a$ Q6 N/ [+ T2 D5 N) u- ]$ N相信e條題目都有吾少人玩...

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. e* |" m' M) oPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) k1 O* T4 T* xThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:9 @. }: K- ?  L) l5 g
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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% g: H: `+ a, ~3 k/ u& Z* ^不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
( C: b  C8 [1 r! Y/ T' \1-6 vs 7-12: j, Q* L4 W# c1 O$ F$ o( }  P- M
if 1-6 = 7-12     13 is fake
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if not % j/ u6 V8 {2 N1 k

0 c& j5 ^$ m' cWeight the 2 time
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Suppose 1-6> 7-12. R: \  a3 W" T6 p9 Z: R# L5 L! t& X4 \

# [; }! |9 E: x) e7 \1-3 vs 4-6   p# T* A: P8 L. v, P8 R5 i; T. c
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Then Weight the Third
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  g) a$ ~8 r6 y4 n5 M0 LSuppose 4-6 > 1-3
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5 G2 X) X: J6 ^+ O# yJust like the first Step
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4 vs 5 . {6 A! z6 E9 `: R- n

) T9 r/ v8 E, ^# ]4 d. I6 ~if 4=5 6 is the fake one . [# G, \4 N8 u0 W: u/ M! S1 S- r

% p& w; J. t. d  M+ o  }: Zif 4>5  4 is the fake one
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1 Z6 `, q* _: ~3 |% ?and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
  ], e* G1 W/ L" o$ ^# XGroup B: 5,6,7,8
4 j4 l9 i8 }/ L. u( Q# E  xGroup C: 9,10,11,12# @) r7 S. G* E" B& I
Group D: 136 J. e9 d* R0 R; W  t. Q! ^
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Round 19 f) w2 ~# `  s9 b0 Z
Group A vs Group B
% _* t/ s" P1 m) l如A and B一樣, 即較輕一粒在Group C or D
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+ ?" V$ y% b2 S; J7 j5 [Round 2
* S9 S0 U+ B% m, O$ h再在Group C拆成:) b. S" k/ Z: C+ ?2 y
Group Ca: 9,10
  ?: a5 J9 t& d4 s: D: B/ pGroup Cb: 11,12
& P" e1 ~2 ]: I然後再秤, 如一樣, 即13為較輕一粒.
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. i- z# j: z; y' v如不同, 即較輕一組有一粒較輕波子在其中,
0 L8 p! K; l* e# ^6 ~7 l! ]6 P2 ~要再秤, Round 3, 之後便知答案.
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$ x. Z% X; W3 N' x1 Me.g. #1 假設10為較輕的一粒
+ _% p- D4 x( ]: M- h+ QRound 1. o, F0 K$ W+ H+ n0 N
1,2,3,4 vs 5,6,7,8 = equal1 A; F5 `0 [/ t# M( B3 Q- U

9 F( k. x! e3 N$ S: m4 kRound 2
. T& C  C( u4 I0 t9,10 vs 11,12 = 9,10 < 11,127 F$ I7 A$ u# l5 _/ k

  x/ ~* a3 V6 v6 M9 M' r& J& LRound 3
2 T) D! h+ l' y' u( O( ~: \5 T9 vs 10 = 9 > 10
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The answer is 10.
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' X3 {4 O$ r8 we.g. #2 假設7為較輕的一粒
* D  j4 W- O! D( C  p+ U& O1 dRound 1
  m7 U, w' N' v2 a1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2( f+ t& Q# F8 F. v+ w& m( I! ~
5,6 vs 7,8 = 5,6 > 7,8# A# T6 `% ]2 _* u' I

. i$ d0 R: T4 k) S  ]" x9 YRound 3# m1 t! ~! P; S3 U% l7 q
7 vs 8 = 7 < 8
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9 D4 ~, J; O. p; M8 GThe answer is 7.
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3 P5 d' t: B1 }9 R0 qe.g. #3 假設13為較輕的一粒  o1 d8 v; b+ T
Round 1
7 y; a( Z0 L% D; y) r# |  V1,2,3,4 vs 5,6,7,8 = equal
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Round 2
8 j; Z  k& R4 B' E# N& m9 L! o9,10 vs 11,12 = equal
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No Round 3+ v: {; I# ?9 |' x$ _
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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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! w, q- E, |  H2 y% e[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:/ d$ |1 n) S4 s" Z1 V4 K( N: }
1.
: l& b  ?5 b- J: ~* ?1 m9 E* N4 f1-6 vs 7-126 E8 y$ z+ B. @' Q
if 1-6 = 7-12     13 is fake
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if not
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2 d+ s/ y3 B+ _7 eWeight the 2 time 6 b. n% ]/ t4 D, y4 D2 o* j

9 b7 V0 ~  G# j. s" ASuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3" ?! N, X+ t" m; I9 }) x7 k
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Just like the first Step
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% m5 Z& h! T! N! @8 L+ j( r4 vs 5
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3 t/ K& ?6 \* K4 c9 _1 ?7 rif 4=5 6 is the fake one . \3 Y9 N8 I. e

6 v- q* X  H: R+ t3 ]+ k" Q$ o" zif 4>5  4 is the fake one
/ L2 X. ~* v, yand so on......................

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  [5 D+ ?5 b) E! x- S問題第二步: g. b' V( ]; i  U! I

% m- H) {0 x5 \Weight 1:  1-6> 7-12
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; @  _% L+ H8 p& w5 fWeight 2:  1-3 vs 4-6 , if 1-3 = 4-60 [# |( l; t% m3 c1 @
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你第三步点去搵 7-12 边一粒???# R0 }  s4 F6 v1 |' u8 h6 ?  f
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問題第三步! g  z- P* h% Q( R: R6 }# K; H

. s+ r, a7 s) u# m: O/ _Weight 1:  1-6> 7-12
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. J- Q% R* n* _% Y* a; {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