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! c% [+ e* t- j; e

. h( s$ e; Q' \) l" C; E『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)。
+ n$ `8 E2 u2 G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？』. V1 Z$ g' C4 {! p6 G$ o4 `, O
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注意: & O* k# M, R4 n2 U* S* @- e

5 V: D; |; E( K  ?. u1 B. W: Q1. 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2 a% `' E8 N! K! f( F

& T% S$ @: g2 w% D" e5 g2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:+ S# ~5 o- _: s; z9 A. r. {4 z/ a
相信e條題目都有吾少人玩...

7 n' d/ u8 P) w( W& S7 ?( T我以前畫左個chart去答,
5 m& y8 v4 A' U7 \; p9 i; M等我搵下仲在吾在
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# q( S5 W' T: L: j0 s當日用左37分鐘答１２粒波子，差７分鐘才合格。/ k' @* H; j$ i7 W/ H( n
13........., [- p& T2 ^7 x. x4 v# {

& c1 n* w9 |. ~9 t+ o1 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:* j7 w" n& ^8 D3 K/ I( h
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我以前畫左個chart去答,& C6 Y! f) I$ y7 o+ o
等我搵下...

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; V; A7 D; P! x% x: U& m: M  E; c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:
( _& _; P! l2 q" _) R/ b唔識隱藏...已經諗到..

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* q) Y, E& [, z  c, p# h) Zsor !!!....e加改左  E1 T$ V6 y) ^7 b% ~9 l# }4 J; [

  a  L$ Q1 T% G! H: C1 z2. 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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! G6 [1 l: v* n& |' _! c5 E[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:! v/ V+ n) p! {& {6 o4 b6 o
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:! j5 {6 U3 J* b1 S

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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

  V# }0 K: I1 |8 T* K

4 a+ v+ P" @( d不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
% i8 R' f; x/ U: s1-6 vs 7-12
# P# E9 b9 M' f! f' aif 1-6 = 7-12     13 is fake& t$ N- Y4 Q  g+ P  R

, g- I& A5 }) Oif not
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# U4 l5 G2 c! }, W4 _6 kWeight the 2 time ! H1 I. T3 d* L4 i% ^4 s

7 f" H0 t; ^- E, F( f0 OSuppose 1-6> 7-12
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1-3 vs 4-6
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- o) X1 A* n  E) u( q' ^1 J# }Then Weight the Third
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Suppose 4-6 > 1-3# ?, I. l8 y4 [. R" ~- |6 r! i4 ~

1 I$ G& ?' v9 [Just like the first Step
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) Y: L3 ?0 x, G2 n; H8 [$ T; S4 vs 5
0 F6 T; ^  l$ S: Z  y0 `2 e3 W& o1 L; c8 U4 V* N0 S
if 4=5 6 is the fake one
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1 p1 l) U7 F$ S2 a. l( Fif 4>5  4 is the fake one
9 b3 Y* a% a) R4 n! L. ^) K: r) r3 u1 I" h" n
and so on......................

hello1997

分3組4隻波子秤3 Y8 n( a6 B  c  V
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Group A: 1,2,3,4' }- d4 W$ P4 T; M& E
Group B: 5,6,7,82 F% j" X# w' p$ w
Group C: 9,10,11,12/ X' A7 n, D8 H8 v! \
Group D: 13
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6 d6 M3 M! N) g7 @; m0 i6 uRound 1
. ~( v# T8 n* F, R2 ^: e1 k/ xGroup A vs Group B6 B' z* z: i2 E$ V& Q
如A and B一樣, 即較輕一粒在Group C or D% {, A- K1 i+ t* n9 T
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Round 2, h$ P: p* y8 ^! }
再在Group C拆成:
2 T, k4 L" M  `8 _7 a4 sGroup Ca: 9,10
7 j( Q  R$ L" I5 fGroup Cb: 11,12; p4 ]# w! p) C8 h  h! E7 u7 k
然後再秤, 如一樣, 即13為較輕一粒.
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; `! R/ L# t- l1 e如不同, 即較輕一組有一粒較輕波子在其中,
0 W; A1 ?3 N; B0 k& p/ Z要再秤, Round 3, 之後便知答案.' v* \! J# z1 O5 [# `  Y
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e.g. #1 假設10為較輕的一粒
) t+ F: E7 Z5 xRound 1, a1 X% f/ P3 @7 J( J1 D" l, w8 F
1,2,3,4 vs 5,6,7,8 = equal. \7 x# @/ R- @0 W  z' ^1 u

- n+ a/ P  j' i2 z+ RRound 2' ~: \. c9 D4 O+ y2 N& C; W. i* Z
9,10 vs 11,12 = 9,10 < 11,12
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Round 3& V6 z8 p: Y8 h8 I$ {! e& P
9 vs 10 = 9 > 10
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* b# X: c4 s" F4 ^( M5 VThe answer is 10.
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3 S* U1 ^" E# Ne.g. #2 假設7為較輕的一粒
$ G4 g2 ]' e" }Round 1: D. }, r2 B3 v  o
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
3 G- h4 V8 \/ x0 b3 K) N% ^, e: l$ Y" H5,6 vs 7,8 = 5,6 > 7,8
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Round 3- V. x+ O4 C! k
7 vs 8 = 7 < 84 Q1 P' I- O$ ?! @- o1 u  L

* y- V1 P" o+ Y; ^The answer is 7.
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e.g. #3 假設13為較輕的一粒' F- s) N5 `2 |2 U7 G  M
Round 1, i. ]/ `8 j6 ^2 I! t4 B
1,2,3,4 vs 5,6,7,8 = equal
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Round 2; G1 E' j, r6 z$ A3 Y
9,10 vs 11,12 = equal3 F7 H6 W" `$ V- j8 F

: O5 ]) J8 D- S9 ]: e7 j% wNo Round 3' A5 F/ c+ n! w) {
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The answer is 13.6 ~3 R3 O7 g! g) q, e0 B: t5 e
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唔知我答得正唔正確呢?! , I2 o. f5 P2 [

  i/ M6 j3 v  J( C) @( I; n+ \[ 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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1-6 vs 7-12
* l$ E8 N, s. a! y6 `+ Mif 1-6 = 7-12     13 is fake0 I: p# }( n' l% o; @
5 o& z5 e3 _, F3 R
if not - v2 W( y! z% m5 e

2 ~# y% |2 H5 @' I) j4 U! NWeight the 2 time 4 g/ r* j+ v  X( ~0 G$ k# A0 g* A/ ?
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Suppose 1-6> 7-12
3 J8 v8 \4 O! c- H; O  g! l6 c* _+ T5 O3 r, A5 l& z
1-3 vs 4-6 " l: N$ m! H2 _0 n* @3 j1 }4 L% y

( D8 |3 N+ o0 j3 c# ^Then Weight the Third
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1 B* V' h/ f* W0 ^  XSuppose 4-6 > 1-37 H$ P5 @  ^; o" S

. {( \# [7 B. r- @) I# i  ?7 aJust like the first Step/ O: s' R3 ]' K3 S1 ^- Z- I4 ~, O% u
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4 vs 5
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if 4=5 6 is the fake one 5 w! B- Y, J: K

4 \8 ^1 v0 o$ n! z- `if 4>5  4 is the fake one 4 E% w! U/ G" P, I
and so on......................

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6 q' g8 k( ^6 a問題第二步. \' s' a7 o* m$ l

' e  _* D2 h$ T6 ?Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-69 H5 K0 j6 A% R6 L
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你第三步点去搵 7-12 边一粒???% u* V3 H9 z; C( O
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( }6 w4 ?4 R/ U- O1 @7 e5 b% x問題第三步. O- _; Q5 y9 O! ?4 d* j
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 - A. ^% n) e- s) r$ e% V  [

3 P  n& C; E9 Q! q/ H7 X! ~; q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