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- o% j2 R( \0 b7 ^' ^. m
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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)。
* K; J) @9 r9 c  [" U; r8 `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？』, n- E6 {# X/ o9 u; y. y  [
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注意: 0 n$ j, z. L4 A/ G

4 X$ d0 J" p- ?5 C4 m9 e' d" h1. 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3 L$ V0 l) `* `) s
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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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, o& n3 v. P# [: B[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
; F4 u0 S2 F; }1 M* J5 {; F相信e條題目都有吾少人玩...

! F* e! n* t* H% E0 y我以前畫左個chart去答,
: z5 [( e5 X4 l/ b% T. \等我搵下仲在吾在
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4 q) W0 G3 b! }( {( v% `當日用左37分鐘答１２粒波子，差７分鐘才合格。' m9 R( U0 n1 i9 K  @
13.........
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6 D1 `2 u8 M, g/ R1 [( T2 \  ~( @[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:) C2 e$ a4 W2 k6 f
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我以前畫左個chart去答,
! a) w, m! v2 |等我搵下...

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+ Z$ C% j2 O4 W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:
3 v8 l3 s! R( z4 t$ w唔識隱藏...已經諗到..

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" n# e! N3 n6 k* E; Ssor !!!....e加改左
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# h9 U" T6 C( _4 G: L' j2. 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! `* t8 q% {5 o# V
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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:
5 j  ?/ x6 s  F1 @' q0 D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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:7 L! p6 |1 k# `: o
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3 l; W5 D& _$ U! r% y/ H" [( mPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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4 s3 \: \4 D, d! 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

1.
  I, z' t! c/ d7 R; X! f4 A+ _8 s4 p1-6 vs 7-12" V! j; |8 c: q" i% x1 n
if 1-6 = 7-12     13 is fake1 P/ l& z6 P% Z" a5 }; G: {$ ?+ e: H, c
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if not 0 `' {' b8 c& p7 O. h

3 L7 ~2 r; J$ R* h8 w4 g8 RWeight the 2 time " z) v, d3 Q; P3 {: D" u# |

1 M! B% W% n; b+ M) Y* b4 ySuppose 1-6> 7-12! f7 F  O7 h) Y
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1-3 vs 4-6 2 Y' G. T2 |- y- I5 S

& f- _9 f/ h" l7 K4 b8 R( nThen Weight the Third+ V6 F4 c4 X! P5 A$ P( X4 F( |
3.3 h) w. X8 ]7 l8 G) _8 K  j

  R# f7 u& ]6 R- D# NSuppose 4-6 > 1-3
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- Y; u; S" K1 N/ `) y& y" s, iJust like the first Step
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( R5 }3 N3 S( ^* N4 vs 5 & a9 d$ V" h5 r  G
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if 4=5 6 is the fake one
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, v( k! k; G' _, M2 Hif 4>5  4 is the fake one ) P+ Z9 ?" b/ P0 I7 k
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and so on......................

hello1997

分3組4隻波子秤
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3 M' g& x3 ~$ Q  P+ JGroup A: 1,2,3,4! i- W) Q2 K5 S3 w
Group B: 5,6,7,82 r3 T  ~! }. ~- ?! t) d4 J
Group C: 9,10,11,12
9 V; n- G4 C. O- @1 Y" EGroup D: 13& L! b; O* L/ x$ \6 F+ k
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Round 1- I( v3 l, x% N' `& H7 W
Group A vs Group B/ K: M8 ?6 L$ {/ ^1 L
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
$ |5 R5 N# y) f& s, B9 X. B# Y再在Group C拆成:
$ c  j% P3 T* m: A" lGroup Ca: 9,10* d- H0 m( Q' X0 `* {; J$ B
Group Cb: 11,12
4 k0 H; K3 q, H3 c* N2 r' w% y* ?然後再秤, 如一樣, 即13為較輕一粒.
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3 }: ^; |7 }- r1 a, z' o2 C, j) d' i如不同, 即較輕一組有一粒較輕波子在其中,
+ F  R' I' Y* l1 m) u2 o& A要再秤, Round 3, 之後便知答案.0 f' r% [( f* o! G! i6 h: E: K

5 O6 s6 K9 V. w1 }& Ie.g. #1 假設10為較輕的一粒7 x5 f, v) j# {% _: t
Round 1* C/ ]& y( y4 L6 f* u# a5 y  @$ t
1,2,3,4 vs 5,6,7,8 = equal, ^9 P9 u  n$ {3 N* F& u

7 m0 q% w& b- F7 y9 Y9 ~+ m, ~, nRound 20 Q. @4 m5 z% s7 Y0 q5 t% O
9,10 vs 11,12 = 9,10 < 11,12
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Round 32 _$ i  E) s2 w# Y" c# r! [7 i
9 vs 10 = 9 > 10# r( a  M% i/ _. ]- K
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The answer is 10.
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: A! K. {, I' Ae.g. #2 假設7為較輕的一粒
' S! k( S+ o3 x3 @4 y% F& F- ~Round 1
9 m4 F4 u( S7 x1 `/ @1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& Q' K8 W" i4 k2 p* w6 `& k

) p5 g6 a, X' j" NRound 2
( B9 J* ]. K8 O4 f4 L5,6 vs 7,8 = 5,6 > 7,8
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Round 3
7 j; U2 w- g# g, k$ C& ]7 X1 w* W7 vs 8 = 7 < 8  _3 I& s0 `& J% P( Q% O

7 p# l# }: y/ d5 DThe answer is 7.
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e.g. #3 假設13為較輕的一粒; @4 r" G! T' g! q8 Q' w/ q
Round 1* P9 Z) _/ y, K% u: m9 E+ X  o
1,2,3,4 vs 5,6,7,8 = equal; Y3 s  r6 O; i

( L/ n, N; |% M; R+ [: ~Round 2' o; X! h5 P/ O% |% ^
9,10 vs 11,12 = equal( _; ?2 N- A& e; G: |

7 {- O3 S9 L9 G" W# D  j5 r" R+ RNo Round 32 X) B: c! f/ w( D5 J5 t
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The answer is 13.8 ~6 T  p1 \8 ]/ m9 L

) }) E/ }0 u. _* X5 n* K" @唔知我答得正唔正確呢?!
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5 z9 i" N9 T( k7 a# c  Q) K' S[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:( k4 j8 d: w$ s) B- q4 C- T
1.3 {2 d$ [3 k4 P: u. Z) @( c: F- m
1-6 vs 7-12
/ _/ T7 Q" C. @4 _; \1 ~( [if 1-6 = 7-12     13 is fake1 z/ G" D  O4 B4 N9 W5 k& p  k, H

1 \- X! s) {  R# a; v+ oif not * U+ K8 I6 S* k* S; R- ]8 h6 X0 d

* c' N, \# T, @Weight the 2 time
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Suppose 1-6> 7-12
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2 D5 R+ |! u' `3 C1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
1 _5 ~4 |2 g" Q  E5 w/ c3 j9 y1 b2 ]$ Z
if 4=5 6 is the fake one ( e( W7 }2 q" b* p/ _! ?& [

8 w( G/ R0 J2 ^# \4 g) i* h9 u* I7 Lif 4>5  4 is the fake one
6 [% o, U- e; y0 Mand so on......................

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問題第二步  ~/ @: B( J2 K( A1 g! z/ Y

3 g9 `8 K/ P) M( }Weight 1:  1-6> 7-12
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6 t* v7 v9 i5 @& l1 {6 ]Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6& ~9 S2 O" x5 k' K# W& f' v& K" h
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你第三步点去搵 7-12 边一粒???7 J; w4 a6 c5 _" o

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+ H; D2 E# q9 L+ O- d問題第三步, I" X  j$ z$ X% c# f

2 X. l* ]( [1 f0 ?# }/ c6 `Weight 1:  1-6> 7-120 K) O4 Y( g% T4 v" N& m  r8 _
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Weight 2:  4-6 > 1-3 $ f6 Z4 V- y( A2 |9 T, z' m) G0 w, E

# g4 q: h4 a4 O! _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