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8 k6 i. l, \) L, e5 T, A$ N' ^1 n4 s9 o

& w1 n$ o0 Q" Z0 `; e, s6 c& t" ^『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)。
! v# |7 L  \7 L( Y# R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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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
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( `3 V/ C" J1 a& I. 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
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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:
1 S1 l5 ?5 ~  f7 }# `相信e條題目都有吾少人玩...

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我以前畫左個chart去答,
/ l: ^6 X$ N. C6 I% T等我搵下仲在吾在
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2 X4 V6 a8 _2 F* S當日用左37分鐘答１２粒波子，差７分鐘才合格。& H4 |0 C; V' m# ?9 _( r: R) ^
13.........
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0 m2 \" H! u/ p9 Q[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:. T* {" p3 w( \1 N% x" ?. B
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我以前畫左個chart去答,$ E& R8 P7 K1 V5 ?/ ]
等我搵下...

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0 t- N% G- O5 z/ Y) F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:9 K. p/ X8 T" P- b+ D
唔識隱藏...已經諗到..

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sor !!!....e加改左5 H! F3 K4 d% ^: f( ]6 A9 T

+ v: v  g  R- G. d2. 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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: y( I$ [# b2 Z) U' C[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:* P- F* ?5 \. S) |
相信e條題目都有吾少人玩...

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6 N, n) [8 Q: P7 H  X! J  jPlayPlay, Let me know later who has the right answer and I will add points accordingly.! g' V$ B. R2 X8 y

/ @$ ^; N7 e6 g! kThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:2 f2 Z' N  ]) B
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( l' M# t: b5 S4 F8 E9 Z0 uPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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+ d2 J' O/ Z  ]5 s/ o! v+ H# u: bThanks

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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.
& `  l. H, u6 M! s- N1-6 vs 7-12
/ f' I# t/ B* L% gif 1-6 = 7-12     13 is fake
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if not ' f/ }5 I$ e+ [- W: _# ~  O

/ R/ B! i% C2 zWeight the 2 time 4 {8 z0 |' J# w

) `4 D" w5 B, L" C! ]1 b! G: mSuppose 1-6> 7-127 G) K3 S+ D% M. B! j5 \& k

: P) w8 e% @  F7 X1-3 vs 4-6 , y- t4 z5 A8 R6 n5 t2 n6 h4 \4 C
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Then Weight the Third0 @* m& E, L/ g0 Z9 Z% x
3.
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Suppose 4-6 > 1-3
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5 C! w% T3 _' Z6 \2 w3 tJust like the first Step% D7 ^& M1 A/ O1 H" J- I& N5 i8 z% U' u

# P+ p9 m& z; z0 E. ~( D4 vs 5
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! K- G+ q5 C2 Qif 4=5 6 is the fake one
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if 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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, H1 s1 j5 ]# {8 CGroup A: 1,2,3,4
8 h. _2 v  l# n  IGroup B: 5,6,7,8
2 p- Y, k8 ]- j2 E6 XGroup C: 9,10,11,12
9 [5 }$ J% W, n" i# jGroup D: 13
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Round 1; t1 o$ Y+ c' o$ ^$ Y
Group A vs Group B
1 ^9 x+ z+ a- Q- l- {: N如A and B一樣, 即較輕一粒在Group C or D/ m7 \" W2 O: O

% O8 d+ a2 b7 K3 DRound 26 w9 [2 c0 S1 D7 B8 E$ w
再在Group C拆成:8 ~1 ]0 L4 _% f0 u/ ?" A
Group Ca: 9,105 d) ]3 s4 P( G1 Z  H
Group Cb: 11,12
( K% m$ h; d& I. Y6 a. w* W0 K+ ?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,
  O$ M$ A6 C! Q/ J. D要再秤, Round 3, 之後便知答案.4 @) c0 B6 ^0 ~0 s* ?. C

6 Y( G2 d  |. |: K0 Te.g. #1 假設10為較輕的一粒) ?* W- G- I& H& a1 {5 c, I$ t
Round 1
# B$ b+ s) K/ `+ N! s  X0 j6 U1,2,3,4 vs 5,6,7,8 = equal
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6 P6 c9 O2 ^% P* r: G  _4 v( f, @Round 2& e* ^& P/ B: `8 Y' ~  Y! k
9,10 vs 11,12 = 9,10 < 11,12% s( k0 B, `9 Z7 K) L

2 I: H$ ~2 s7 b1 P3 C, p: JRound 3
8 S3 i# C6 l9 N" I& F" {! L- A9 vs 10 = 9 > 10
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, r7 f* O. [$ \" ?7 QThe answer is 10.2 J  p! N; r8 ?( D3 x7 }/ C

: i  |: S1 @7 b* Le.g. #2 假設7為較輕的一粒& \# M! V5 [3 y; L( v/ d
Round 13 g6 |7 Q) Y, L& r
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5 B5 U' I  V. [Round 2# w# w! c7 G2 T: F: J  {
5,6 vs 7,8 = 5,6 > 7,8
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Round 36 D& h' Q0 f* Y) o
7 vs 8 = 7 < 8# r" F% A! _6 [9 k4 @; l& a3 F
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The answer is 7.7 r: V4 @. o" @$ e+ e! P" f

; Z* g" l9 l1 h+ V) w1 z# `e.g. #3 假設13為較輕的一粒
" G0 O4 u; y& ~Round 1
3 r* `5 k( e" X7 n; A6 l1,2,3,4 vs 5,6,7,8 = equal8 J( A: r& C! m" [  X' y4 W8 A
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Round 2
& E6 Q" c2 q6 z: q: I9,10 vs 11,12 = equal
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4 l9 ?( F+ Z. z+ g/ ]- u% Z( T0 VNo Round 3
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. w' {- S$ X& W1 b# nThe answer is 13.
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唔知我答得正唔正確呢?! $ j& W* j2 w) Q7 a

" A% [6 E) M% Z# ?3 m[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:% Z% ^; U6 D" q9 s9 d9 j) \7 [4 \1 C/ @
1.0 ]: n9 U6 \7 N, h% k
1-6 vs 7-12% A8 A8 p0 `* `! |6 m- N. s
if 1-6 = 7-12     13 is fake1 ^) H  y! S  c/ S8 n$ d+ B" t; T: ]

+ v% c. G# m' g) h: b' \. `if not $ G8 ?5 f$ d. `3 i
- t; l3 G* w/ Z! F3 I% }
Weight the 2 time $ i$ \, }4 ?. \: d" h8 U

& Z! z: r; _& C; m& }( dSuppose 1-6> 7-123 i5 \: Y. o* r8 x

) ?8 V+ c% Z9 S3 M/ ~6 U1-3 vs 4-6 : j% G/ ^/ n4 Q: ^
6 D5 C! R. [% i# s( D
Then Weight the Third/ ]/ H* I& e. f0 |# u
3.; {7 }% T; }$ ?
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Suppose 4-6 > 1-3( n* n$ m1 x! L+ p% {  s: `

% l7 P+ `# F+ R. d+ ]Just like the first Step
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4 vs 5
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* `$ D+ l- e9 z# |& lif 4=5 6 is the fake one $ y- \& L' j# `3 V  F
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if 4>5  4 is the fake one 6 y6 v( N  k' u. D! x+ a* L
and so on......................

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7 K' F8 M& i+ d7 I$ Y問題第二步; n# \4 H! @0 D
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Weight 1:  1-6> 7-12
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* V0 y; P( ~* nWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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) `; K3 _+ H; x2 [: r/ l你第三步点去搵 7-12 边一粒???
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- q/ {4 I6 ]: D2 V9 X; T========================================! N( H- X0 `5 C0 \( s
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問題第三步
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Weight 1:  1-6> 7-12& Q9 E, o2 V3 ^! w$ U( H2 s: V

+ b: i. ^9 F* V9 LWeight 2:  4-6 > 1-3
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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