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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, l, j  v0 V9 J  z& I3 Y* @: |『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)。
. P' Z# R& }/ l! E4 G/ l- N& I/ l$ }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:
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( U: `  ?/ s! P8 Y2 V0 M1. 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 r0 y1 F3 J3 d7 P& H2. 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3 n. {3 _5 v4 t0 V) O8 Q
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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:
2 w+ }3 \: ^' l# w0 F7 X# h8 `% I相信e條題目都有吾少人玩...

( d6 A8 o, Q% B* x  p- B( z我以前畫左個chart去答,; y5 q: J# d/ b/ u1 c: x
等我搵下仲在吾在
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7 }3 p4 b8 s' h9 [$ d/ u當日用左37分鐘答１２粒波子，差７分鐘才合格。1 U) ?1 `9 U3 n* o  e9 [' ~' X, m
13.........
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; f" n$ ~/ T( _. i5 k3 J8 N8 o[ 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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3 N) D" ]: J$ f2 l9 D% G/ [+ N我以前畫左個chart去答,; x, F$ m" `; i6 F7 I& U
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:7 [* b( Y8 p. v  P1 j
唔識隱藏...已經諗到..

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sor !!!....e加改左
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( L. D# O* U  h( D' v2. 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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3 j* N* Z6 ]9 Z) f7 b8 j2 k[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
$ ~; V5 ?; f9 B# W4 e$ y" c" r: J相信e條題目都有吾少人玩...

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+ O; I+ y  F+ ]0 L: ^% uPlayPlay, 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 z% B2 r" q9 ?+ X

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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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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
7 l& z: |+ v2 q8 g4 s1-6 vs 7-12
! z. c, Y1 n7 P6 ]. a$ m3 D% Rif 1-6 = 7-12     13 is fake0 |/ [' V0 n3 |. S0 j4 Y

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Weight the 2 time ( s2 {" v2 W$ ]) P; P

6 i8 r& s+ P2 h( w9 `3 H) }4 aSuppose 1-6> 7-12; |3 V7 T% _6 `) @
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1-3 vs 4-6
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# w1 A$ M: D: C/ [( AThen Weight the Third
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2 ~" D- X2 g! z. ]0 mSuppose 4-6 > 1-3
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Just like the first Step
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& _/ o5 ^6 w9 S4 y' ]7 j9 {& r4 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 3 Z( P+ v$ R2 ]; A* ^/ G: A

* j& L. P$ j0 F7 E/ Z  F) f- J  K5 Fand so on......................

hello1997

分3組4隻波子秤1 C5 x  F. U1 w
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Group A: 1,2,3,4
4 c# W9 A( J; {2 O$ I/ b. l# F& @Group B: 5,6,7,8
3 `. z) Z! b: vGroup C: 9,10,11,12% @# w6 l/ m! X( y, S
Group D: 13
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Round 1  T% }6 L+ D; b8 x/ N" [
Group A vs Group B
+ m/ ^* k0 |# G如A and B一樣, 即較輕一粒在Group C or D
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3 y/ c7 P: n. |, c; XRound 2
1 N9 i! t/ q( \再在Group C拆成:
$ _/ s6 z! g5 n- l2 x* TGroup Ca: 9,108 A# j& B$ T' a0 l7 n/ J- j' u8 O
Group Cb: 11,128 [% j+ ?% G4 U3 d1 S2 S
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, 8 ]" E7 i* v7 A1 `4 ?6 L- c% n
要再秤, Round 3, 之後便知答案.
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4 i* E( q/ k- ]+ oe.g. #1 假設10為較輕的一粒" }& |" F8 T/ g) L2 E  \3 F6 X
Round 19 W$ z( @$ g% v* h8 m  u, t- R
1,2,3,4 vs 5,6,7,8 = equal& `- H2 K6 Y2 N2 D: ]- ?9 M8 A
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Round 2
6 _" U2 S$ f" G! s* V$ j4 j9,10 vs 11,12 = 9,10 < 11,12
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7 O' L! \# s$ _" v, O4 nRound 3
4 }$ S/ O+ Z: {6 F* e7 x9 vs 10 = 9 > 10
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) v) C, ^* n) h: a. o4 dThe answer is 10.
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% G( M1 X5 C0 I3 ]e.g. #2 假設7為較輕的一粒0 D# k, ^0 ^: }% e9 I
Round 1
2 E) H$ X! j# w! a5 n8 B1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 22 `1 ]. q& e6 u  L; d
5,6 vs 7,8 = 5,6 > 7,8
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( i7 o2 w; k& N6 W5 y/ f% ~) ?* {Round 3
7 b! V" A5 X9 ^$ N8 B: j7 vs 8 = 7 < 8
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  b  z4 P5 C% h0 p5 e- KThe answer is 7.0 B% v1 X) ?: Y: w# ^/ F" F

6 E9 H; a0 Q  r& U) l4 M9 le.g. #3 假設13為較輕的一粒2 U9 ^3 q% ~2 U  u" r; ?5 v
Round 1% b( h- ^7 j8 A/ s3 @' |
1,2,3,4 vs 5,6,7,8 = equal9 S2 d5 a- f1 w5 X' o
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Round 2- E+ R& M5 `4 M) S
9,10 vs 11,12 = equal! ]5 r0 I  f9 F6 @# X. z% ?
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No Round 31 T! c/ k* d" z9 F+ h
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The answer is 13.* G. O0 ]' U  E, W4 q
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唔知我答得正唔正確呢?! 3 J: S6 Z9 i) ]! w5 j, @* T  z& [
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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:5 _: O" p; z6 z, B
1.
$ @! }# J$ O. T3 |/ g1-6 vs 7-12
* v: g; F5 s5 H4 Wif 1-6 = 7-12     13 is fake2 E/ |3 ~: p4 ?0 n' H/ V

9 I4 Q0 ?6 j. V# X& Iif not , o3 S" J" ^' m+ f4 ~+ u6 {: F

3 n8 I( w, S) M# _Weight the 2 time 7 q5 y& |5 l" Z

" x4 G) S8 N2 }/ k* J- ySuppose 1-6> 7-12# P. s" M8 y* v4 M* \0 G
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1-3 vs 4-6 . Q( ^3 W" J& q4 P3 P% P. A5 r1 ^

2 D: n  F4 p5 o' l1 i# hThen Weight the Third
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Suppose 4-6 > 1-3
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# p9 Q6 Q* s/ p0 \: A! T3 Y( b) OJust like the first Step. ~* q0 v0 o, W

9 r8 I$ `5 [, Q- y* f$ e4 vs 5
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7 p! c0 [( c7 Uif 4=5 6 is the fake one
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. o8 ^6 F! H6 C6 j0 E$ Nif 4>5  4 is the fake one 7 S6 E" k( d  C
and so on......................

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問題第二步) g! v% F3 ?. y) s' R5 p5 {% }
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Weight 1:  1-6> 7-12/ a" {- x  r, Z: f& \4 ]( Q5 h9 l
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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???5 U+ S( A5 Y% a5 l

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& O) a  L$ K9 |% j, q! a2 b問題第三步
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9 g$ ^+ N7 }/ R2 DWeight 1:  1-6> 7-12( {2 {" l0 ?1 Q1 Q
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Weight 2:  4-6 > 1-3 1 T  R; ~  h9 X7 Q; N3 ?' f
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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