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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( \7 c1 _1 A+ C; T1 \% 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)。
5 `! ^" f" E4 t& S3 o" t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？』/ `5 c$ p# K+ T4 q8 L+ e( c
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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8 b8 s6 r5 M- ^9 X/ @
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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  , hide 字要連埋 , 內容 = 答案' e/ @3 U/ T# u

# G( m0 ^- \! h& o[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
1 t) r# z. U8 o4 I1 H3 O) S/ R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,9 [. ^  S& a  W! d) ~- Z
等我搵下仲在吾在
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0 p  J3 ?( |+ {5 n當日用左37分鐘答１２粒波子，差７分鐘才合格。8 k9 K. R( z6 H" E6 @$ U4 S
13.........
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[ 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,
# |( ~0 m# f9 z8 S3 R( y5 `* ?1 p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:
" e7 R4 d! z, [3 }+ A唔識隱藏...已經諗到..

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0 z: j1 n1 |4 f. u. K7 E! m0 G2 Esor !!!....e加改左! F* T! |" ~1 L1 V1 ?( X
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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:/ E5 v6 y( U4 N) x4 v9 C; j
相信e條題目都有吾少人玩...

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! w$ s; W- y4 R1 y1 N. vPlayPlay, Let me know later who has the right answer and I will add points accordingly.% y2 c) G* ?& \$ r, I. m
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:1 B' ^' `% e& v" J1 J$ F2 B
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, o! p0 s3 Y  V. O% DPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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) c* U! Z. q9 A; H1 R1 Z* j. x5 W不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
- f0 v6 N( U/ @- O1-6 vs 7-127 L! U, q; Z0 e$ K3 f+ e
if 1-6 = 7-12     13 is fake  G6 C. @1 W$ }- d4 @
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if not 2 k1 n2 t$ p6 k' r1 @+ S. @
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Weight the 2 time # g. o$ O. Y" }1 O/ e9 W
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Suppose 1-6> 7-12; S0 P$ U! [% F( _1 O0 l0 Z
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3. `+ ]' E% E  R: U, A

/ W+ z% @* K) y# n6 O7 QJust like the first Step5 M1 f. b; ?3 j- ]6 r7 _

& @# I. x: y4 E8 T" u4 vs 5
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if 4=5 6 is the fake one   \  C' l: D4 ]& B6 h' u- c) {" O
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if 4>5  4 is the fake one
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; D: q, C) d4 X. ?and so on......................

hello1997

分3組4隻波子秤6 [. I, u1 |1 y7 K

' ^) M/ @  |; c. SGroup A: 1,2,3,4" l/ \: I7 g: d
Group B: 5,6,7,8, l+ W5 f* ^4 i4 |
Group C: 9,10,11,122 m- y! P' b0 j+ |9 n0 ~
Group D: 130 J7 r  H; _$ L  e
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Round 11 b- g* ^& r% p0 ?
Group A vs Group B
. A5 m3 t7 U& r( Z, m, R) |如A and B一樣, 即較輕一粒在Group C or D
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; i$ Z- `- v. t6 PRound 2
1 O) g1 @- y) D再在Group C拆成:
, p: L6 D/ Y" v  mGroup Ca: 9,10
! ^6 x* O1 k' u, {% Z7 oGroup Cb: 11,12
/ h  Y+ [7 I% v7 y% r然後再秤, 如一樣, 即13為較輕一粒.
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) e6 Z" j+ T# N" a如不同, 即較輕一組有一粒較輕波子在其中, . h0 D: V* s- H, D9 ?/ n/ S
要再秤, Round 3, 之後便知答案.- t$ G& n) x9 y1 y

" t( K- K+ E6 xe.g. #1 假設10為較輕的一粒' g/ K3 G& E/ a3 Y
Round 1
! Y0 X8 c. C# D: Q! X( r1,2,3,4 vs 5,6,7,8 = equal
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Round 2$ R' S9 e1 J# ?' V- S
9,10 vs 11,12 = 9,10 < 11,12# V6 r0 J5 b9 p! r$ T

) ?: q& @: T; U, L! y! ^Round 3
" h' H- i  z) `" P9 vs 10 = 9 > 105 L/ F5 @5 l! T2 @. }
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The answer is 10./ Y% s! Y/ {, E* ]+ L

$ T: G" A- u; x1 W, m" `3 V9 pe.g. #2 假設7為較輕的一粒' e7 ]( _3 Q* b! S% N2 Y/ d
Round 19 E$ F, `+ g' o; v
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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4 g+ E- h" z5 p$ o# f7 URound 2) X6 z* _4 ^* S
5,6 vs 7,8 = 5,6 > 7,8" K5 j$ Y  |: E$ c) b* \
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Round 3
2 a  t% [- N- Z7 vs 8 = 7 < 84 @; K+ x3 s6 H

& N  y5 Q$ ~6 v8 P& h3 |( mThe answer is 7.% f$ G6 {7 D5 y" y

$ c' J2 S: t: Z, je.g. #3 假設13為較輕的一粒
$ o2 Y; N/ w5 j3 |5 |2 ]$ PRound 1: l/ e$ q3 u8 D+ `3 w  t5 t. R
1,2,3,4 vs 5,6,7,8 = equal* C+ s+ g0 d0 s, ]( t

3 Z# b$ C0 [/ ?Round 2
' E9 j* Q7 p! l& b0 Q9,10 vs 11,12 = equal9 g) G$ k- ~  r; |3 w  Q

* [2 @' N6 W% G; NNo Round 3  o# @7 P3 P' a2 j) o. F1 m! e

6 O8 k9 W; y9 K5 |' U& g6 eThe answer is 13.
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. |0 c7 m6 ^, ^" W唔知我答得正唔正確呢?! 3 u1 D2 @) d$ s

7 i: i9 G4 Z+ ?[ 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 N7 s( Q! r0 d' y) `# _* i
1.
' H0 k& ]) y' `1-6 vs 7-12: I/ P* i7 }3 p$ g6 ^
if 1-6 = 7-12     13 is fake
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1 v. b( D# t0 Vif not 7 {: k; n" u+ m. q, o

3 h; X$ \; I$ KWeight the 2 time
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6 m5 w3 D3 Z6 z0 j6 YSuppose 1-6> 7-12
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. U! j* Z: p! j7 C9 n1-3 vs 4-6 9 B! j3 }/ W9 C0 V- _

( i  t1 m3 o8 MThen Weight the Third
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Suppose 4-6 > 1-3: N( n  Q& t' T) \  `  A; ?0 d6 n
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Just like the first Step
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" b8 w1 }7 j, K4 vs 5 " w8 s9 u' s: w% K% ]5 r
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if 4=5 6 is the fake one 1 A3 d, |5 d7 {+ j$ R

) W7 S, {5 l$ Fif 4>5  4 is the fake one 1 j$ P, H1 p0 d$ [
and so on......................

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. V1 ^: Z6 C  b, J9 z問題第二步
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Weight 1:  1-6> 7-12
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. z! w+ q3 d7 B. r$ KWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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0 x( N* V1 g& e6 F3 k6 B2 w你第三步点去搵 7-12 边一粒???( p! u9 ]; p1 f6 J

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問題第三步
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# n4 e7 S3 x, H  WWeight 1:  1-6> 7-12( I7 M* c+ f9 {- x
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Weight 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