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, A' t, o& Z1 k8 @2 H: q, `/ r

6 a0 V& O; G( ~' q+ c! ?4 {, I: A2 U! u『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)。
2 L% y% k- \# w  Y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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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
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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:) A9 T  Q6 W2 }9 ]3 f3 ~' z
相信e條題目都有吾少人玩...

7 ^* e1 U0 d# K- M! r1 y6 D/ D我以前畫左個chart去答,
7 q" T' C' y/ e. w5 I等我搵下仲在吾在  r* E( I  Y8 n( M  ^2 j
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
( M+ a; q3 _+ U- ^4 j. e13.........8 m8 k4 G- ^+ u
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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,7 F" i1 @2 Y) q& x7 a# z
等我搵下...

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9 p% ]9 ~* f7 X! f" n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:
* Z) Z3 N6 s$ g& S唔識隱藏...已經諗到..

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* F; c0 ]) Z" `2 i- @sor !!!....e加改左
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9 c8 j5 D! \# X: u; `* K2. 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, j7 g; H; F. u: |6 H0 W
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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:; [4 y6 |" N: P/ ]' l
相信e條題目都有吾少人玩...

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. @% s* Z( x3 ^2 Q7 LPlayPlay, 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:! |% L9 R0 A. \: s9 @% f
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9 n- J" F& C: _  h- i" @* V, V6 OPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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/ t$ y+ P6 p: TThanks

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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

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1-6 vs 7-129 x1 j% ]; l: t% n
if 1-6 = 7-12     13 is fake
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if not 4 q3 I& I; x! ?. ^5 h
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Weight the 2 time 2 |" v9 n- B) p" o

# l9 D* D6 E. u- h4 Y# f9 PSuppose 1-6> 7-12
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4 S( B9 U( {' V1 M/ L' ?  X1-3 vs 4-6 ) ~8 P# Q6 o; h$ g

% F* `+ A9 R6 u* n3 {0 G# x8 Z! BThen Weight the Third
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$ B, T3 ?' z  A! A' @- A  BSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 6 f! T/ V" A& H4 ^0 _7 W7 ?

3 ^# r6 M& @# j) N( ]# fif 4=5 6 is the fake one $ {: Y: x3 t- b: I7 O

& w( R6 K" d) C" r2 lif 4>5  4 is the fake one , W% J% [6 _0 T, _9 W9 a

9 Y; a$ Q5 l: j3 }$ \3 V+ P& \and so on......................

hello1997

分3組4隻波子秤% d! O9 l6 I$ D$ d2 L9 F

" J3 b3 q0 D2 Q6 N0 X2 ]* xGroup A: 1,2,3,4
. k) C# c2 D) f# `Group B: 5,6,7,8
$ L4 r7 w* U/ P. {Group C: 9,10,11,12( s$ A) k% L' S! L  Q- ?( ^5 D" S
Group D: 13
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7 ]/ E; U- v% U/ L/ fGroup A vs Group B! `. _( v' U- |, @, o3 ?
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
* o! S$ J$ a% k& M1 I8 A  u再在Group C拆成:4 K) c( u+ E! B4 B
Group Ca: 9,107 F3 k' g. f1 ^1 N
Group Cb: 11,12! ~+ w7 B6 p* l; N
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, 9 y9 o6 `" U) j/ k
要再秤, Round 3, 之後便知答案.& O! `! k: I8 F' O" Q  f

8 `3 {1 h0 y1 h3 l7 Se.g. #1 假設10為較輕的一粒
! r# V, r- M+ u  D5 {* kRound 10 O+ P/ N6 n6 l' x
1,2,3,4 vs 5,6,7,8 = equal3 H, `2 E0 l: F% c4 v+ s9 l4 Q

4 p, [. p+ q( h* lRound 2
) v" I' ?0 |. C0 Y& z  q9,10 vs 11,12 = 9,10 < 11,120 s  R! z8 z5 U% X' o1 n

& d5 x7 E7 r; F' W! ]7 FRound 3
& F! t  G* a4 s+ Q% g9 vs 10 = 9 > 10
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: A( |6 B: {! J% Q* HThe answer is 10.8 ~3 s. K# i9 w/ w1 F) m; ]4 c$ T

: ~8 \3 e7 p) @0 D/ O* ]5 w* o' }3 Y( De.g. #2 假設7為較輕的一粒
7 k# r* c6 v8 ]" aRound 1
/ S) W. C7 y8 b4 s/ Y) h5 V+ ~  s: z1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 C9 x8 [  I6 |5 x# U& `# |
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Round 2
/ E. w+ E* [0 m# K5 V  J2 `' Z5,6 vs 7,8 = 5,6 > 7,8
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$ y9 n7 P- ^. ~9 h% [! o* qRound 3
  M) V7 y1 q) E$ M+ i' H7 vs 8 = 7 < 8
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The answer is 7.& `$ H2 S, U0 p  o2 p: E! A

1 {" W& H  @+ q3 t, R( J$ s$ L( A4 }e.g. #3 假設13為較輕的一粒
6 B% {+ Z6 x, E8 }5 c& F1 V& C+ zRound 1
6 J% C; N/ k" E6 m1,2,3,4 vs 5,6,7,8 = equal, P; j! B# U+ `) B8 j
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Round 2
0 a. _! k7 U  T: T" V: o! n* ~9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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" u- }' a& w9 W" V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:
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1-6 vs 7-12
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if not
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  _0 o7 O7 V$ l' CWeight the 2 time
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Suppose 1-6> 7-12$ e! R$ V$ X2 n) @- B4 p

6 R% ]" b8 x+ t  u, s1-3 vs 4-6 3 H, o1 X' o1 U5 V) n
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Then Weight the Third& b! Y' g0 u& [
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Suppose 4-6 > 1-3
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Just like the first Step
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6 F7 [; L( I9 }3 }- Z4 vs 5
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0 l! f2 M' [. u% c9 W, c1 \4 _& Tif 4=5 6 is the fake one
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if 4>5  4 is the fake one 2 e: A# @6 K( A: F; f' S& s- R
and so on......................

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( c! p) [6 H5 w5 q. f, Z問題第二步
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4 W. d+ ]" E) KWeight 1:  1-6> 7-12
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, K- p" h9 U9 [' R6 G# h5 ]8 kWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ `% @& ~  E9 u你第三步点去搵 7-12 边一粒???
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問題第三步3 F0 |+ f/ t# v9 K

/ v; Z- o3 C) NWeight 1:  1-6> 7-12
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. a9 R* ]( ]% _* ], h& Y5 _" Z5 \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