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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% Z0 t. a2 D" D5 U  E: R『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)。
. C' J2 \3 z- ~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: 7 T! }! X( w! w0 ]) U( s

0 ~+ n2 |! T2 W( g1. 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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% J5 q; h3 k' c2. 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& J" C: i/ T' ]0 N7 ^
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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:, m( Y1 N6 V+ O5 Y3 Y& W7 `! S
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,
1 l5 e( o) a+ w% t6 U$ B等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ }$ f* X4 C1 g) ^8 i13.........
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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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- Y* x( n* V; n7 s  \/ J我以前畫左個chart去答,7 T, a3 a% y7 P4 w2 e  p& l$ Z% [% r7 p
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:
$ \. P" K5 K: a  ^* l  D! c唔識隱藏...已經諗到..

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$ U" ~$ O0 R1 j% esor !!!....e加改左
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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+ `! h# e( e) \5 J1 Q+ U2 S9 m- 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 V, F  f0 W
相信e條題目都有吾少人玩...

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& @. b8 s" r' tPlayPlay, Let me know later who has the right answer and I will add points accordingly., {3 I/ m& }4 m0 q, j  h
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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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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; k4 a6 Q# ~8 Z# w* a6 p" l) U" D# S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 7-124 L' [# [/ E& P/ c8 O& ^
if 1-6 = 7-12     13 is fake; L, j: d+ ]) t3 M# B

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Weight the 2 time
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$ H5 ]5 S$ b7 h# ~4 l8 bSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third  x+ J! C8 d# w& Z7 s( @
3.
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Suppose 4-6 > 1-31 J1 P! Y0 Z6 f8 l6 p
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Just like the first Step! N5 j) t  k3 {& [/ T/ I5 Y% g
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4 vs 5 + s% a5 }8 A- U- H: W: v
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if 4=5 6 is the fake one 3 P& p# S1 ~0 {. s2 c/ `

. _' ?0 m2 b* S+ oif 4>5  4 is the fake one
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% F5 g- I2 v$ Hand so on......................

hello1997

分3組4隻波子秤
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) T/ u/ S8 w5 z! [  }- |Group A: 1,2,3,4. Q6 T* Y2 ~" |% ]' w0 S
Group B: 5,6,7,8- C# W' `7 R) U9 e0 g$ c( Z
Group C: 9,10,11,12
7 [+ G: b0 h! A& s- `' uGroup D: 13
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Round 1
: ?( Z& h1 {+ N5 r- T! g" g3 QGroup A vs Group B
$ O, J8 Q  [, [+ T! k+ Q如A and B一樣, 即較輕一粒在Group C or D) x, i5 T6 h: j7 b: N
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Round 2; M7 T$ A& d0 R! j% `, y6 w% S
再在Group C拆成:
  ?* r/ V; N1 r+ h, b- ~2 @Group Ca: 9,10
, B' K! ]4 i  a3 f* CGroup Cb: 11,129 O: j* W! G; h5 X0 {
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,
( X  J2 V$ f+ e. W* \# o要再秤, Round 3, 之後便知答案.7 L: ]8 I2 A9 S7 j

/ N  t/ G9 o1 @$ U* w, je.g. #1 假設10為較輕的一粒4 g7 C* l5 r. o7 c) U( M
Round 1: i& {3 K: n4 {6 C* Z- T  n" f1 M
1,2,3,4 vs 5,6,7,8 = equal
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9 u% X/ v! j# c7 y6 PRound 2
% e4 Q' M, B$ C9,10 vs 11,12 = 9,10 < 11,12
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Round 3* B9 x: |4 u, B7 l9 f1 C
9 vs 10 = 9 > 10
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The answer is 10.. |8 \  x; D: V% Y2 v0 X
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,83 d- J6 D* T, M' F/ N2 m3 I

) W/ T. b3 W, p* m8 G5 r/ b% zRound 2% \+ c/ s4 x9 F; b7 H1 ?1 D# G
5,6 vs 7,8 = 5,6 > 7,8, p7 q3 \+ j4 h
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Round 31 k9 \6 N- p; P- i* G# P8 l) z
7 vs 8 = 7 < 8
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& {; i6 i9 b, M+ eThe answer is 7.
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e.g. #3 假設13為較輕的一粒
1 W7 s) a. }+ ERound 1
, H; M- f* r  i; N8 d1,2,3,4 vs 5,6,7,8 = equal2 P0 T( C2 E7 ^9 O- n) }
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Round 2+ J* R6 y( \8 n3 |# t$ ]  Q
9,10 vs 11,12 = equal
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' Y0 O  \. ?6 t" b) Q! ONo Round 3
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/ W: f' C2 _. ?' _( O1 K3 C, [The answer is 13.0 y  L: {( v0 c& @; ~( r
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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:" d# _: `  T; j9 @
1.
+ u2 p+ s' k) m* J$ S1-6 vs 7-12- j0 `5 C  x; t" H0 b
if 1-6 = 7-12     13 is fake0 A0 Q& Z0 Q. D0 u, q* i

1 O% m8 ?4 `; `6 Lif not
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Weight the 2 time
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! _! v! c; f1 ^6 XSuppose 1-6> 7-12
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) j2 A3 w. _- ?9 g4 |7 v1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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2 A' G; k! Y( `1 S8 DJust like the first Step, L1 y1 L1 m* T' T  L0 m/ j0 [0 y

/ u3 k4 j  [5 ~- J( Y6 d: V4 vs 5 ( N5 J( m' l# [% p: C; D& \

9 h8 T: ?. q' bif 4=5 6 is the fake one
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if 4>5  4 is the fake one : N) _  @5 j" q
and so on......................

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問題第二步, v" b: p- T1 c* ]

. {* A/ V4 I3 Z, t; yWeight 1:  1-6> 7-12/ d; X5 y) y7 h* Z. l( i4 \5 ]
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-60 I) |5 c* m6 b) R7 K9 w
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你第三步点去搵 7-12 边一粒???
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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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* }( X6 q  k  s* `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