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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0 K' E$ H1 y% S1 F9 O. f' q0 `% o『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)。
7 l9 H. x2 ?# D. `! u7 o  \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:
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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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" `( n6 h( y* e3 f9 z7 o4 G2. 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( g" T3 f( h0 _* ]

5 A( ~. S+ @3 Z. n[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:2 y4 G, C) B# I* f
相信e條題目都有吾少人玩...

. J# q. _7 [' o+ U2 a$ a我以前畫左個chart去答,+ o7 \+ p5 F; n$ ~
等我搵下仲在吾在6 ~9 A$ g6 T9 U+ H6 V( O: m
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當日用左37分鐘答１２粒波子，差７分鐘才合格。8 @5 w) j0 o' o4 \7 s( N: j
13.........
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* m" w, R5 |6 r% G( z4 I% H[ 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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# h# k* P1 ]# W9 [% e我以前畫左個chart去答,; j; J% m: r9 ]% v% h4 @( W
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:9 `# e4 s1 K2 H0 o; F9 k* D
唔識隱藏...已經諗到..

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6 r# c; L  z2 R: o& r9 e9 \sor !!!....e加改左1 ^7 C$ \4 d8 V, Q

  [  G1 \5 z5 k/ o2. 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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- C. W( X9 f& t' n" `[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:7 [  J) o# {% D# J) k
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:
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: }8 c$ D3 E3 X. E6 B* MPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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7 C/ [. k  o, I/ Y" L, a5 [/ ?$ SThanks

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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.
: Z* j! W  G/ W% ?1-6 vs 7-12
: t& l9 o" k* l! b5 H# a6 cif 1-6 = 7-12     13 is fake
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& A" Q: S& a& R" d: [* tif not
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% n6 ?8 g/ ]4 J/ l. ~Weight the 2 time : h! l6 u  j2 ~+ [

, }7 V# ~0 B6 a" cSuppose 1-6> 7-12
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# B: x! `( \  K1-3 vs 4-6 0 X0 @" ]  y3 E. d# B
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Then Weight the Third8 _: @0 k, H; C
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Suppose 4-6 > 1-3+ u9 s1 R8 C+ I
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Just like the first Step
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2 T$ N! }# q  w; ^4 b, Q8 B4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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3 E! N: G' m6 x3 Yand so on......................

hello1997

分3組4隻波子秤
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0 W% J) f( ~9 F  c, [& YGroup A: 1,2,3,4, u$ A5 ~- f" V5 n; Z8 n( I1 h
Group B: 5,6,7,8, D# H- o2 B+ q/ e9 ]5 l
Group C: 9,10,11,12
4 ^( I2 B# N# N! W( JGroup D: 13. |- b) l% R. D

" _! b/ }& P! ZRound 1* |. @* n9 q8 ]0 E5 S
Group A vs Group B
, @! \9 E3 k; Q3 ^  }如A and B一樣, 即較輕一粒在Group C or D( B6 z3 V; B" Z1 S: s! [

0 J, G) |) P1 V+ `5 YRound 28 `' v& e6 g8 z$ b( |/ U
再在Group C拆成:
% ~4 X1 C& D$ b- kGroup Ca: 9,103 l: c7 |  M+ d* i
Group Cb: 11,12
# D8 K/ g3 i4 T5 M0 b' a然後再秤, 如一樣, 即13為較輕一粒.( j" d+ W& e! L, k

. `/ M4 n- W2 \$ _% ?, \' F2 L如不同, 即較輕一組有一粒較輕波子在其中, 7 a3 h8 G! J) _8 c
要再秤, Round 3, 之後便知答案.6 L% w% i+ L% r9 w) Y8 Q) d

) [% e5 A+ r. o% Ke.g. #1 假設10為較輕的一粒
/ ]; Q; x" u2 P- k6 _Round 1
1 u7 R4 X2 b' u3 m" X; C1,2,3,4 vs 5,6,7,8 = equal
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Round 2% |4 `9 s2 f1 x8 y! O- M; |! [$ q
9,10 vs 11,12 = 9,10 < 11,12
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2 g4 C) ^0 g& D( d: ERound 3% V6 v+ N3 i9 t7 T. g
9 vs 10 = 9 > 10
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+ A6 I' ~1 _1 f6 M# A3 ^The answer is 10.
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e.g. #2 假設7為較輕的一粒
  |" S+ b; v7 n# aRound 15 |: E( z# p7 E! R3 I) b
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,83 W1 j9 ~% x8 B) V4 |
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Round 24 K% R0 R8 [1 ]3 x) b; B
5,6 vs 7,8 = 5,6 > 7,89 K% H$ C$ i/ ~  y

; e* e' Z- A* G/ \9 NRound 3) K: O5 n" s% ?* s- }
7 vs 8 = 7 < 8% K- j: `- z9 R+ S& L! A( O, r6 A

, \8 A! R1 l: ^The answer is 7.0 [7 `! ^1 |' \

2 j% H  H. t# \9 x0 D$ Ue.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal% q! u0 U7 P* Y$ `% S' A# P! f) |/ e/ T

6 V% W- Q! z9 A) k/ V* {+ lRound 2
# }- e1 S( G3 k9 m9,10 vs 11,12 = equal6 n6 X1 {. i$ q$ V& \& E) N

6 z; n  P& ^, m, {: dNo Round 3
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4 y, [* x; p, W1 A5 k; wThe answer is 13.8 R; s  J. I* s4 I& w, _0 z
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唔知我答得正唔正確呢?! 8 G, e; ~  q) s. J3 U3 E5 p* _
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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:/ U. `* x( ?8 h1 m5 B
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1-6 vs 7-120 \2 B+ b1 X* w3 o
if 1-6 = 7-12     13 is fake
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  C5 ~+ ?. I) G& l6 T, V, M3 Vif not
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4 \$ z* G4 ^: a" z  Q. oWeight the 2 time
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  K3 V" h# N6 V1 X3 _9 oSuppose 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 > 1-31 N% [& v( j8 m4 i+ h1 A

6 ~; Q/ W7 u1 M# ?% gJust like the first Step
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/ C$ k! G1 i8 B& N4 vs 5 # u2 A2 |( k) [  z* v
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if 4=5 6 is the fake one   Q7 b" a4 l9 }9 D, o- ^9 N

% d( N" G3 e+ \7 w5 Mif 4>5  4 is the fake one 8 M& \8 @& M: V# ^% Q* `5 h
and so on......................

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問題第二步5 W- a8 d7 I1 i; Q4 h( r
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-67 M. ?+ `1 Q' ]: N0 X3 D
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你第三步点去搵 7-12 边一粒???2 O: |7 {2 ?5 j9 X

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問題第三步1 d; P+ T3 _4 U& m
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Weight 1:  1-6> 7-123 ]9 p" q8 S* @

" d5 @( h$ b6 f( @2 t6 N/ W  FWeight 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