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5 n' X7 J0 t% E. }

$ v) q0 Q0 I$ F" \( |『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)。) z' I/ l2 S, B$ i% P/ r4 V
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？』5 o' h! \0 X8 }, E5 M: @2 ~& p

# Y7 R. K' T% x+ L6 Q! g# |注意: & ]& Q% w, f2 D/ m

, T# \  [2 Y2 q, n1 I. J# {4 _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" q( i3 j) v' k
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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:
# |  g7 u6 H* `相信e條題目都有吾少人玩...

7 P' y2 y: ]& ]) [+ T% @7 i我以前畫左個chart去答,# G" l! v' F3 C9 k7 c
等我搵下仲在吾在
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( c! f/ V2 b9 S& H+ S4 F當日用左37分鐘答１２粒波子，差７分鐘才合格。; I' }/ p) [( l& ^& ~2 y( U: c
13.........
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' j+ n+ X) l# ][ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
9 d' Z% _) o1 g3 ^
- T% u( a/ Z: O( r我以前畫左個chart去答,
) r0 `$ B% d- S6 e2 y) q等我搵下...

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7 J9 b+ Z# |* ?  t* c: I% |+ _0 p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 k- t# M9 n3 N: O3 ?8 n0 ]+ r唔識隱藏...已經諗到..

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  Q4 g; Q( G! ssor !!!....e加改左' M9 u1 L4 w& S. i; p0 x( U

; N4 E1 p+ y5 o  L2. 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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4 Q/ A, I5 |4 A' o+ 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:  I1 E# d9 Z9 h( n! j. S* p
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.4 C- _* R  W# Y/ z4 {1 v
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  a1 z9 V& L. C) a* X# I+ n5 ~
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0 Z/ k6 q# b3 @; qPlayPlay, Let me know later who has the right answer and I will add points accordingly." ~, R0 [# `" \" v( z1 u3 ~4 i

8 z" Z5 t6 b4 JThanks

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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.: }  o# k& x. ?
1-6 vs 7-12
2 b2 f  e+ P% U" Q/ s" cif 1-6 = 7-12     13 is fake5 |% a+ I6 ~( a  W6 L

7 P. g: \7 Q: Q  h* R( o! r6 lif not
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- {7 h, s/ X# W+ F. XWeight the 2 time . E3 |$ Q; j7 I
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Suppose 1-6> 7-12) |8 S9 ?0 x& Z, d
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1-3 vs 4-6 , q7 T% O" O6 |% k, R+ o5 G

9 P& `  f4 j- N$ j9 U' N. lThen Weight the Third8 E9 @, R+ U) {2 B" [
3.
4 E" h" @( `$ W4 }+ h8 O
  @- m1 X, D' i3 L( USuppose 4-6 > 1-3# B; h+ s) `6 r6 ]2 h+ m( ?
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Just like the first Step
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2 H% q* L& Y8 ?; b5 b) v4 vs 5
+ |2 M% o# c2 ~  l  S9 ?3 F! O' C. c( F* J$ b8 T
if 4=5 6 is the fake one
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) D: h5 L2 q  Aif 4>5  4 is the fake one # b$ t" D( n. R! S/ W

* ~% Q% g; o2 A6 {* g9 rand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,42 a$ O( L* @6 m7 K; M4 I
Group B: 5,6,7,8. Y3 F0 d* U0 X( S% \' v& ~
Group C: 9,10,11,12
, K4 p* ]4 p$ E1 G" h" M  W# pGroup D: 13
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Round 1, }$ R( W+ Q0 ~, b
Group A vs Group B
( K+ K" v  m7 F! b如A and B一樣, 即較輕一粒在Group C or D
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Round 2
/ W$ q/ _# N6 w- E1 Z再在Group C拆成:
- V. v9 O4 S. w5 V0 AGroup Ca: 9,10
2 Y2 Z/ _3 ~7 g8 m+ T. vGroup Cb: 11,128 L' e1 J$ i, M& c5 k& G
然後再秤, 如一樣, 即13為較輕一粒., @& D1 X- o* f

) Z( m; N4 l. J0 O& ?4 d如不同, 即較輕一組有一粒較輕波子在其中, - [) E5 C+ P/ p7 s' M% a
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒4 J3 z( B8 f+ {% G. ~6 \! [7 ^" m
Round 1' ?. V3 L# g( p$ i( E
1,2,3,4 vs 5,6,7,8 = equal  `( R1 [4 {/ w* V/ A

9 l$ Q+ C- z/ R7 G$ b1 B! SRound 2
; k; n. x$ x/ [) o: A- o5 h9,10 vs 11,12 = 9,10 < 11,127 c; x3 s$ s7 C! M2 w+ _

% o2 r' O* ]7 A$ @. ]9 b) rRound 3) T4 A2 ~3 Y. J% P* j
9 vs 10 = 9 > 10
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The answer is 10., y! c, L+ r8 r& Y/ R9 H. s" M

% M8 Z6 J- ], B' `5 [/ Z) Te.g. #2 假設7為較輕的一粒5 t" g. Y- G# Y% H9 T$ z" I( E
Round 1( |$ p/ @& G  a- p) A
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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! r1 i6 L8 S3 @  \# sRound 2
' v2 D8 z$ ]" K& K5,6 vs 7,8 = 5,6 > 7,8
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- u) L" w0 V# N/ F: F& qRound 3
3 C% b4 ^+ X1 R/ W( ]7 vs 8 = 7 < 8' f. ^. ^3 q, @# S( m

' j- A$ u; k$ WThe answer is 7.
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e.g. #3 假設13為較輕的一粒' B9 a5 D+ O* e) c$ X. h3 i
Round 1
, y+ P/ \9 A+ J* L( Y9 W1,2,3,4 vs 5,6,7,8 = equal% z' y- u$ ]# E( E5 C0 D1 u

2 r* t. {5 \( ]# ?. f" {Round 2
9 G. U1 I- E% X2 V& V9 v9,10 vs 11,12 = equal, a% X" f) q: f

8 I( g( _: d. u" xNo Round 3# t" k' ^; I/ f$ c* A, J) x

2 Q' }2 r6 a$ RThe answer is 13.* a! C/ P2 n: U* a, |  E2 u: G
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唔知我答得正唔正確呢?!
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, N+ Q# q, F, B6 X[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:* P% W8 p. Y( O! ^* u6 [: H
1.0 }/ g4 I+ C0 c& r, r
1-6 vs 7-12( j: s- Z9 y% P& _# x
if 1-6 = 7-12     13 is fake7 J) _! }) M0 X: m

3 Y1 D" F) O) K1 v2 V" f) \if not 0 O( B$ a- T% J+ r* j
, \1 h) t6 z( O. _
Weight the 2 time 1 L  ^5 U4 S* S

6 l4 {: [4 \8 o5 Z) _& CSuppose 1-6> 7-12
6 l. `8 [9 U) b0 r  n; A+ O; \
5 E. Y& S( [# Z+ ~- b  J# S1-3 vs 4-6
' J! H+ b' b0 C2 u, ~( Q, |3 n# @0 r  K
Then Weight the Third! ^5 `& b; Z8 E, f9 P7 b
3.4 Y0 F+ L% B$ w1 Q$ i) q& }
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Suppose 4-6 > 1-3
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Just like the first Step
+ z: R' S1 n3 B# j
1 f$ _4 w  Q. a4 vs 5
' w2 W9 v6 U, Q# Q) |) m$ a9 S' U/ V+ R
if 4=5 6 is the fake one
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if 4>5  4 is the fake one
( z6 f0 H5 G6 u! f2 _) `9 Fand so on......................

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問題第二步% t* X" M' Y+ \# P: Z
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Weight 1:  1-6> 7-125 z9 y1 U2 H. P, X* G; z

5 g% C' b* q* Q$ T6 O9 }Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???2 K! v2 s3 D5 H. y3 |0 z6 i
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========================================
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4 B& J3 _3 \1 w8 L問題第三步6 l; |# V" I2 B, ]
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Weight 1:  1-6> 7-12
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0 G  a9 b0 k  ~* P' WWeight 2:  4-6 > 1-3 . x5 ^3 h  P- x$ R# s

. N4 U  \" k0 n% }& ]  p& \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