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" ?# h- B% E% g& c* a

3 D( m+ [. |4 C『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)。
* Y4 D8 _% f9 q6 \2 @( e9 i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: " A9 R% g6 I# m4 [4 g

9 G* s5 O6 k% F/ v1. 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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/ j  t7 s" K, }' ]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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2 e  D( v- r( n: S! `& W# M* I[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
! z2 e1 W4 g, y" p* Z相信e條題目都有吾少人玩...

+ U- o  w" t2 W7 e' a3 K. f% W4 T我以前畫左個chart去答,& I4 J: C4 i0 T( i; j
等我搵下仲在吾在5 l8 c+ t& v0 [: Q
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
6 I+ S& W: \+ R, B13.........0 M9 v2 W$ R+ d. [6 @8 D. e0 ~) E

, }4 F7 d5 d" o5 \0 j[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:' m1 c0 V3 B6 m; Q) K- u8 X* @4 G

% `6 Y: F9 e$ K. p6 [7 ]" u' S# k我以前畫左個chart去答,& I$ L1 E7 b3 @1 w7 g
等我搵下...

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0 i  l& w2 n2 b, a  [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:
# [7 d! w+ x. S唔識隱藏...已經諗到..

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sor !!!....e加改左2 p+ r2 F; g( [' F4 n
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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8 C. @8 x, c% M" x+ V

" f4 J1 U- w- j7 p! j4 y: _[ 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 K/ B" h$ T+ a" Y6 i* ?1 u1 f/ f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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4 b. ?& N( B  Q# SThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 `, V- _2 J/ f, f5 f

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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3 T" t+ K. \# Q# N  R5 wThanks

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( y$ ^2 E( T$ w4 z* F8 ]4 F/ u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 7-12/ W) r- e, G( b' }: W9 I2 h1 h
if 1-6 = 7-12     13 is fake
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if not ' ^+ \8 C' X0 e3 u9 s' s. _' n

( N) w+ q+ L5 D# A& YWeight the 2 time ! ~* X. [! T+ b

2 v1 o- }5 H& ]+ V( p+ X* L* }Suppose 1-6> 7-12* E2 u% f! D1 C4 s

1 D/ d2 D+ ]6 Q/ a( V6 E! Z2 t/ R7 e7 V' @1-3 vs 4-6 + g! |+ q% c$ r

9 u3 Q0 ?. G- MThen Weight the Third
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4 ^/ s, s" S- ]
/ I& Y2 F4 z  w; T0 c. x, oSuppose 4-6 > 1-3. [1 O/ i' r8 d  z- h
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Just like the first Step
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4 vs 5
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, C# Q2 I/ t$ Z; r6 |if 4=5 6 is the fake one
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if 4>5  4 is the fake one 6 h$ D9 P9 N8 M, W
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
$ s* ~6 Y! m* f" [1 V- |# SGroup B: 5,6,7,8
0 C+ }- `( \8 T& l5 DGroup C: 9,10,11,12
! ]& G: ^/ B; W# s3 X6 P" \Group D: 13
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& U) s& h$ U$ sRound 1" O4 D4 G) j$ u
Group A vs Group B
0 o) D& _8 F1 \如A and B一樣, 即較輕一粒在Group C or D/ e6 l; y& |# W" @" B
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Round 2) B7 x0 z# z8 E8 }
再在Group C拆成:
8 l  f: L9 y9 y5 |: {( iGroup Ca: 9,10
; ]0 [2 m! M* p, o3 B* mGroup Cb: 11,12) [0 B- n% c4 Y
然後再秤, 如一樣, 即13為較輕一粒./ o8 @1 H2 v) i3 T  a3 {! k

' i/ g: F, `& h1 L1 ^; t如不同, 即較輕一組有一粒較輕波子在其中, ( o: L2 `; o0 ^7 b1 Z3 L' {* x2 z
要再秤, Round 3, 之後便知答案.
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( r9 r5 {  x) w) W) Ke.g. #1 假設10為較輕的一粒
, Y# G) q# O# j9 iRound 1! ]4 u( l  L4 M. I
1,2,3,4 vs 5,6,7,8 = equal6 r- u, ~" f; o

5 \$ Z6 P2 i1 V4 N6 c* CRound 29 P8 w3 f5 p+ L0 J
9,10 vs 11,12 = 9,10 < 11,128 q9 c# ^; \+ N6 |" x. `" V3 {
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Round 3
4 A1 n( Z, X3 H% T9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
2 D- i% K3 d6 WRound 1! z1 ~+ H5 s  Y& f) C
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
7 p0 i- d6 P! g5 l' ]5,6 vs 7,8 = 5,6 > 7,8% b4 `1 h, a/ d3 @2 H
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Round 3
" ^4 A4 _$ n- j4 c8 W% r! d7 vs 8 = 7 < 8
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: y' P* m0 [  R' A0 a. [The answer is 7.  t( O; i# g- V& p: z, P& [

7 `( V9 m0 S9 I. Re.g. #3 假設13為較輕的一粒
& C/ v0 E+ b; l) l$ s, dRound 1
3 L3 X' H. o. z; V8 M) Z1,2,3,4 vs 5,6,7,8 = equal
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Round 2
% S* o4 ^' r2 L5 d; j9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.) ^8 n3 @" l' f+ g+ _3 M$ A, u" s+ x
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唔知我答得正唔正確呢?! & o; ]+ R2 y4 I( x

6 D) }( T+ s% I5 _! l3 `[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:# C6 F: J& ?+ i* X, ~- \$ @
1.
: N; h& m3 l9 u9 |  F' ~+ a) i1-6 vs 7-12
$ t+ [9 P& k* @5 L) B4 d. W% }$ m/ aif 1-6 = 7-12     13 is fake+ t! N! S# J' o! B
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if not ; E' ?7 A* m! ~( X9 _* X" _3 V9 m5 }

6 r+ u) j  ]3 ?, {$ n" [' VWeight the 2 time
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3 W' p* G4 a; F6 B: {# tSuppose 1-6> 7-125 M- @" P8 [! z
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1-3 vs 4-6 , b9 N/ k3 {) ^# k- M$ z

' l6 l$ X4 ^& O5 ^; S9 r7 rThen Weight the Third0 L9 A: o& U7 p/ k# z
3.
3 }$ G1 f' K% n4 w
+ T* c- e. R" P, K" T" ^2 ]/ s. CSuppose 4-6 > 1-3: T( J! Q. C  U( A# q. y
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Just like the first Step
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4 vs 5
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6 d! P) _/ l& I# P/ Eif 4=5 6 is the fake one
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3 F  }3 K4 _( o5 \. n4 eif 4>5  4 is the fake one
9 d. e, n$ n# L- Band so on......................

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. A1 R4 v9 i6 G5 D問題第二步
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Weight 1:  1-6> 7-12; S% W; E  V2 D" Z2 }) j3 w

2 A4 o' f+ U9 H7 _5 f! c' j, S$ k/ `Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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& t% d) @+ F" _7 r( Z' D你第三步点去搵 7-12 边一粒???- z& _- i' g! q0 K
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========================================
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問題第三步/ a* F" w) j" w; V  K& h
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Weight 1:  1-6> 7-12
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& w  ~6 h4 F' uWeight 2:  4-6 > 1-3 ) m7 r( I. |* U, D

- I, ?. t* \0 ~+ }# B$ J" x1 `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