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4 p; p8 p1 Q- O
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『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)。; T" n$ z0 Q% I7 U6 I! O2 q
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？』8 C- y8 {; G$ p

" ^, D1 X' I2 T8 U注意: ( l3 u, ?, c: _+ `

( y5 ~' L2 |- @9 K) y; g7 B, T1. 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4 E  W& O2 B5 o2 c2 `/ I

) _( l  ^5 _) `6 `7 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  , hide 字要連埋 , 內容 = 答案
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7 \' \9 Y, U) u0 `# D6 \3 X[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
& f4 {( k) h7 J相信e條題目都有吾少人玩...

3 u7 [* J4 R1 O) c8 B) d! e& l我以前畫左個chart去答,1 t) j# n9 w+ b2 @5 G/ i' H
等我搵下仲在吾在
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" P& ?9 c/ _$ F2 K5 }9 g& M當日用左37分鐘答１２粒波子，差７分鐘才合格。8 e0 `6 V9 n3 ?5 J
13.........
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6 A6 T! R. h9 G2 [3 U[ 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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我以前畫左個chart去答,
4 \/ ^; ~& O5 @) l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:1 v/ Q4 F6 T3 r" `
唔識隱藏...已經諗到..

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sor !!!....e加改左
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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
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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:
- K, T" t! k- x7 l相信e條題目都有吾少人玩...

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/ p0 L/ `4 N$ f. w, M& g1 Z9 ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.& K0 a9 U) j- f

$ r# v1 \, m8 cThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:9 [8 o; V* L9 u4 A& }: e9 f5 S1 [

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.1 }4 i2 [3 }4 O9 q9 ?$ R

5 ?3 H. S* i$ w& W1 _) \Thanks

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: ?( ?' j$ V& y! J& Z8 j" [0 J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  Z2 r( H; |$ Q( E* H
if 1-6 = 7-12     13 is fake
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if not
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# n; [4 w# ~7 ~Weight the 2 time * b! y# N1 U3 y7 ^0 }* a

  ]# d" k# X2 w/ uSuppose 1-6> 7-12* ?& ]' g4 O* z9 ]# t8 q3 W
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1-3 vs 4-6 9 }5 }9 B% e# l

( w% ^, b' ?8 d, j4 DThen Weight the Third1 c4 t  j7 z- o( M5 z3 a1 p
3.6 i, D7 B3 A: N" l% H0 d& \6 ]

1 K! U- h5 o( H3 x8 {! USuppose 4-6 > 1-3
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Just like the first Step
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' I) Z# e, t0 G1 A4 vs 5
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' N8 v8 W- p- v0 d) d$ I: L( |; B3 Cif 4=5 6 is the fake one
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  E2 k& d7 V2 Z# O# J3 o6 M/ w( oif 4>5  4 is the fake one
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! e( @6 T$ F  \+ w3 d$ Rand so on......................

hello1997

分3組4隻波子秤" n5 s: _( h! W: W3 A( P) s

" d* p0 k$ o: {4 B! A" U( ?Group A: 1,2,3,4
" Z$ [7 D" z: P! o1 p; f% h- A( IGroup B: 5,6,7,8
6 a% m3 z8 {" W/ V# K! @8 R- T' jGroup C: 9,10,11,12) r; {0 ~4 c# A( k. J! r
Group D: 134 W: p  E* T3 p! O/ F

6 k2 E/ P' B" ?( J1 BRound 1) r6 b. M# D) o  w4 U" {
Group A vs Group B
$ ^: Z0 Q% F7 E如A and B一樣, 即較輕一粒在Group C or D2 n( }. |2 i5 d/ ~
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Round 25 m0 y# W1 M! }3 x
再在Group C拆成:) I$ M) }" W$ j- F& \4 [' [* c
Group Ca: 9,10
- j  _% q. A3 w5 D$ Z; [Group Cb: 11,12
! H/ v0 ]% f. U2 ~, N9 t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, + o4 g$ a% r! p( \# E, T
要再秤, Round 3, 之後便知答案.7 ]& m' i" [' K: ~% p* ^8 v
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e.g. #1 假設10為較輕的一粒. I0 X7 l9 y6 ~9 f. T2 w
Round 1
: Q4 m- o5 o6 g$ J+ h& |; `! {1,2,3,4 vs 5,6,7,8 = equal5 V' F, U: P' j9 [4 U, e) q3 l

4 P$ {( e6 z3 \& Y7 [2 BRound 2
& C& l* m& O* C/ {) x' [* S9,10 vs 11,12 = 9,10 < 11,12* j! T; S9 p( ~
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Round 3
3 c: c7 b% \- Y4 n1 M3 \$ d8 e9 vs 10 = 9 > 10
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: ?- U6 f1 M" J8 a: Z7 v" ]5 @The answer is 10.  [  [4 J/ J! G6 o2 r/ e+ L

7 K% u+ s8 P! te.g. #2 假設7為較輕的一粒* }1 ?2 u. ^7 J8 Z: Q# U
Round 1, C- l! D, W5 _2 E4 z
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: W/ P, I6 z6 W, h1 g$ i
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Round 2) X3 `* X' i! @! }, S/ C2 F5 p
5,6 vs 7,8 = 5,6 > 7,8
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7 L  P/ {9 l& SRound 32 h$ t* B. U/ D& l
7 vs 8 = 7 < 84 \) u2 E) |* t: Q
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The answer is 7.
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/ g( G, T1 G5 C8 Z$ w9 w0 Ve.g. #3 假設13為較輕的一粒
( H4 q0 R; |5 B, q+ ]Round 1
; \2 \( ~2 b# }8 N1,2,3,4 vs 5,6,7,8 = equal
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. Y1 F8 y& i  e1 n! yRound 2
7 O0 W- s% v7 Y2 a' \9,10 vs 11,12 = equal+ R6 r, u8 }' G8 O! V1 X

# ]# r6 X: ?8 ]No Round 3# C+ _6 K* `+ f* `* j

2 Q1 m' x9 A$ o, }The answer is 13.9 k( ~  g( t% c

$ M# B, V1 l, W$ D- `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:3 S9 b+ X+ F2 v/ {$ K8 P, ?/ r
1.
9 Q* Z& R5 {, K0 \7 T* |2 D1-6 vs 7-121 V: P4 [1 b3 C4 R1 F
if 1-6 = 7-12     13 is fake
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if not ' G0 l- m- a$ V( [2 Z; x8 j

8 V. j; T/ H6 g+ _9 u& kWeight the 2 time * n$ ^' X3 F: ^3 }/ [% T8 l; P

6 S3 F7 `% b6 e# {' q7 E5 c# @Suppose 1-6> 7-126 d/ R' T' S, _, g5 s
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1-3 vs 4-6 + ~6 _1 N$ _: }! T8 X/ G

0 B! |. N1 z' t. G& eThen Weight the Third( P7 ~5 f/ c+ C' W9 A
3.( E# X: i4 ^+ t2 [+ x3 T

! M# I8 c1 n0 e$ q) k' ~2 L/ K! xSuppose 4-6 > 1-32 C9 K+ L: O, q* _, ?% P) w; S
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Just like the first Step+ M7 \  p' N) Y; j* m' s+ a

% J! d9 `1 @% f& q3 f  ?$ T* C# [4 vs 5
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0 h* J' e7 V  d# H0 R" bif 4=5 6 is the fake one : u1 N& n4 @- u% _2 {' L! ^

% C3 Q! H' T+ ?* ^6 M+ Pif 4>5  4 is the fake one 5 J4 c4 W: p$ Z& i( W) |% @9 C
and so on......................

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& h. d5 I! Z0 d* r' U2 V問題第二步
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Weight 1:  1-6> 7-12
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) f! n. K8 S( @) |" R$ KWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6# q# ^% w5 ^, @# k; T

- A# L% j7 U2 w0 ]9 O你第三步点去搵 7-12 边一粒???3 J! X" u2 E1 s* U. v0 [
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問題第三步
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9 A3 p& w1 X8 X5 KWeight 1:  1-6> 7-12/ T4 h. E5 D6 t) e& a1 b
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Weight 2:  4-6 > 1-3 4 u: O2 @" X& v0 J1 \5 W
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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