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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& E6 {4 s+ l3 ^/ 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)。. J& P, {$ f7 ]
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？』; |' ~: l( a4 l! `" U3 [) b

4 P, {5 j0 X2 f1 f, T0 O4 b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0 G+ K- H2 j/ d& t- w* {

! r/ E9 D4 B; ^! O2. 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4 Z* c6 G* K, A' z
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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:) U( `5 S! I; Z) }  w
相信e條題目都有吾少人玩...

# z: K2 S0 W% y1 I1 x我以前畫左個chart去答,
# P4 {+ J$ H7 i; e. p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。6 W' x% m3 L! \' u: n
13.........
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) t( `) Y5 [6 u9 e[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:& Z( B+ W# G# I% ~3 a# F+ a) Z
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我以前畫左個chart去答,
" a/ t% v. ^4 F; a. e2 g: [9 [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:
8 B1 Y1 J" S, S( l2 d" s唔識隱藏...已經諗到..

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% a( |! b2 Q  D# V$ v0 q2 E6 f
sor !!!....e加改左6 f' `# |4 ]) y

/ \) t7 @5 C# m+ |5 e1 I; e2. 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7 U# G7 I2 L! c: P2 [) y( P. f8 s1 i4 z
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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:# f/ l2 z/ e1 q: z( Y. ?
相信e條題目都有吾少人玩...

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7 f+ k& O/ c8 G; }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:3 a' D# a9 a# C; q2 n7 @/ M( P8 l
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.# w( K+ g: P% V! d! `  G
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Thanks

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9 z/ N  z* p2 j2 j1 d不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
& x, [. Z# w/ L( }1-6 vs 7-12( A& d5 v# D& B) l& \+ R! @
if 1-6 = 7-12     13 is fake6 g7 W( J" }2 h& Q" `9 h0 u% ^
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Weight the 2 time
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4 N4 u7 N9 ^( G8 K$ SSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third0 e  v: d: l" b  E) [9 ~# T
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Suppose 4-6 > 1-37 P4 ~1 N: Y$ G. Z3 X

, j  B& ~2 Y, sJust like the first Step
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+ E5 Q4 `1 r0 {0 P0 R4 vs 5
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7 y. M; X8 t9 {5 z5 r- Xif 4=5 6 is the fake one 1 I  `, [1 s$ K! q0 z: c& }

9 t* g7 m" s8 X* uif 4>5  4 is the fake one
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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" l2 _' o7 E! ]' g. u' M) o* V
Group B: 5,6,7,8) N& f( P. n+ f3 p( m4 ~( [% T
Group C: 9,10,11,12
! l5 C8 t% r: V2 u$ m2 ?Group D: 13
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Round 1
: J  ?" v9 Z8 M/ _' ]/ V5 D7 QGroup A vs Group B
9 V! x. _1 O- h7 O) {如A and B一樣, 即較輕一粒在Group C or D1 ~, n" E3 d. h' \/ l! D

, \( `( q+ K: W' u1 JRound 2+ I5 l: o) F% B4 w7 O5 v( R% \
再在Group C拆成:
$ d1 y+ o) w8 n8 q! nGroup Ca: 9,10
# F, b- e0 M9 y0 M, M; X2 uGroup Cb: 11,12$ V; E+ G' h6 `9 W
然後再秤, 如一樣, 即13為較輕一粒.5 c5 _" `3 h: A6 N4 Z. t) e

2 ]: _5 X2 n1 I( w% g) V* |如不同, 即較輕一組有一粒較輕波子在其中, 8 q( |4 D6 B9 D7 m, k
要再秤, Round 3, 之後便知答案.+ h* a3 v# M9 M) E1 T: Q. L, R1 q
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e.g. #1 假設10為較輕的一粒
! n, V0 p' P! S7 R3 F/ q% WRound 1% [. M' r' J% Z% j. k* m. ~
1,2,3,4 vs 5,6,7,8 = equal
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! ^4 ]$ [) B9 d; w6 s* ?Round 2
2 J' W  R3 o' `9,10 vs 11,12 = 9,10 < 11,12/ o1 I$ z0 a. U" @9 w  Z* }

. w5 ^3 a; L" T5 ?; d2 |6 cRound 3
8 j/ }$ C3 [" G2 j9 vs 10 = 9 > 10! V7 P, ^2 {7 ?; O! o
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The answer is 10.
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- e' B" C6 S+ c3 C. W# @9 l" D( ~e.g. #2 假設7為較輕的一粒
5 j) ]! |  ^7 @( l+ mRound 1
2 ~2 g+ _# |+ n$ s- ^1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; Z: `  M* `1 |
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Round 2  F, n( Y' a8 Q0 C1 D1 O  C: P! K( C
5,6 vs 7,8 = 5,6 > 7,8( B* a- C) X5 A6 {
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Round 3
' N8 l0 B# m3 Q3 L7 N/ A3 }" E7 vs 8 = 7 < 8! l/ D8 x# Y1 r! ^! C+ E
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The answer is 7.8 S* F+ h5 ]( H7 Z7 x6 G
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e.g. #3 假設13為較輕的一粒
$ x6 @1 K) o- |* V* iRound 1
, O/ i1 i: s; ~: \0 M1,2,3,4 vs 5,6,7,8 = equal
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$ S3 g, |0 m9 i( n4 q3 x* b" MRound 2, g8 x& X/ \  z0 j
9,10 vs 11,12 = equal6 d7 A) ]  z4 ?, [8 N8 V

% l8 M& ?( r1 cNo Round 3  ^& Y0 S  e3 u; L; K

- P. _6 s0 J  U+ x( B  ^' EThe answer is 13.
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! _$ [, a; V( k6 ]- n' I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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% o2 H& z# m9 r$ e3 d$ s6 Z1-6 vs 7-12
4 f, I, L9 B7 F' u" M! cif 1-6 = 7-12     13 is fake
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2 U( g- W9 m8 C' ]( wif not
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6 ^+ ?( s- p5 t( X" W' n) N; EWeight the 2 time : Z4 _" ?1 B! M( ?2 G+ p

- D/ X8 h2 z3 {Suppose 1-6> 7-12+ d7 q, H! \( H1 e; ?6 M# |  {

5 h! {& x* W7 l1-3 vs 4-6 ( s( Q1 L, b( H) K3 N  L! p% J* k

: Z$ O# T* n: ^% V: C, v: I! pThen Weight the Third
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& h0 h0 m# t- x% Z& w3 [Suppose 4-6 > 1-33 Z. Y) w) r7 M/ c, C
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Just like the first Step
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8 d( l1 R* {/ b- \& T, m" D4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
$ a% C* W( A- D( n3 `& {& |/ wand so on......................

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問題第二步% z4 Z3 I0 y8 t
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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8 G+ n( A4 d& O* i你第三步点去搵 7-12 边一粒???# s' T- J* ?- g8 X3 x" b

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' u; R, R, ]2 Q, b. }問題第三步1 S2 f- O: N1 z& H% n' o4 t' h$ @

% ]/ w% b9 L/ h4 v- y- pWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 * w3 q" s0 @$ E8 ^! q- T4 Q

. I! W; ~2 I+ ^6 Z% t' e! t2 y8 N: T: m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