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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; k3 B, ]" A- L8 Z5 ?『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)。
+ ]1 d. f4 c1 F7 j8 R# f: {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？』6 G, F2 v3 n: e1 m0 a

+ [7 A# F' G8 C1 ~8 b8 ^# z/ b注意: 8 _7 b. A! n' k, Y( K* j

# P5 a! m( G# O& B2 W. q# w6 r& k1. 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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* f) L6 N* F( q5 L0 M! I5 B  }9 w2. 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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9 e7 z5 o4 Z1 l& T$ T0 X[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
* C; N% o* t4 [" o6 i9 o2 e0 W" m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,
0 f! |+ N( F* T等我搵下仲在吾在
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5 K! o, u3 H( H8 i) S% ]  o當日用左37分鐘答１２粒波子，差７分鐘才合格。% K$ v. u! {) U0 I  W
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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- g8 J7 f5 r, J! r7 U. H我以前畫左個chart去答,
+ ?  `$ e! @( [2 [" k) O' x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:
& ]& y( a+ d$ M唔識隱藏...已經諗到..

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sor !!!....e加改左* X% B' J  U0 W
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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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7 w; }3 W  j# i3 _- k/ F# \[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
. \5 K  t* \0 R+ V/ L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:
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; }% C" E; F* F5 J. {! N4 HPlayPlay, 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

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1-6 vs 7-12
$ b8 r; K. V3 D: u  R  D/ T' Eif 1-6 = 7-12     13 is fake& q6 [6 V. e& v  X. R
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Weight the 2 time
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4 w+ C# R* h" KSuppose 1-6> 7-121 s6 B7 K1 S' O. ~; \3 U$ f

$ H6 y! @8 |; E. B  z+ A2 x1-3 vs 4-6
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3 a' E* K- k" t0 E- L# R- D# LThen Weight the Third1 p* R9 l5 Y: B. T7 {4 k
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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# i, m; X3 @, s- r7 gif 4=5 6 is the fake one
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if 4>5  4 is the fake one 4 Y/ v$ ?7 ?( S; F( R' I+ m" j
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and so on......................

hello1997

分3組4隻波子秤
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5 h/ g- i0 V" M8 b# p4 qGroup A: 1,2,3,4) Z/ }8 y* R2 t  `2 b. Q* Y) n
Group B: 5,6,7,8
) E6 H2 L/ h) XGroup C: 9,10,11,123 U! P+ P5 E% \' P7 V+ z" J
Group D: 13% j' {( h6 T& L/ M5 B1 H

+ ]- |9 z. n, z) g1 N7 g  vRound 19 }" M  h2 T/ A( \7 M
Group A vs Group B
* y1 k6 b# K3 f* P% h4 z如A and B一樣, 即較輕一粒在Group C or D
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Round 2
8 U. {3 j8 L- g9 h再在Group C拆成:
6 d+ h+ R  [  wGroup Ca: 9,10
' J, n# f; G; |+ Y0 hGroup Cb: 11,12
" [" q, y3 n  x& N7 N/ I" `0 V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,
+ a* k& I3 R; K" m要再秤, Round 3, 之後便知答案.
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( d6 M) H; X" ^) `9 Z5 ~e.g. #1 假設10為較輕的一粒8 H0 s+ k; U* \" w
Round 1
) E/ v9 G& a4 S3 x+ `1,2,3,4 vs 5,6,7,8 = equal
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- d' t( L. Y4 Q* l- I9 F# s  @Round 2  I' V, a9 G/ _) d+ H
9,10 vs 11,12 = 9,10 < 11,12- y7 f) s; `; b) p( O* M
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Round 3% @* J8 U! E* i' |1 s: x
9 vs 10 = 9 > 10% F+ X( E# m& b" X( e. |! F2 k" G

. C' ~% S! g9 L4 yThe answer is 10.9 D6 }/ b6 L0 ~/ F/ d5 q1 L

: P+ e1 U" B, T. ke.g. #2 假設7為較輕的一粒
8 Y; N3 c: n9 h; jRound 18 I" v4 K# M+ W% D
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, P& u7 x$ w  b/ G; C0 M0 O, x
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Round 2
$ a! B- T4 t& E) a: \$ m! i5,6 vs 7,8 = 5,6 > 7,84 X7 u" V7 {- `; B9 u- Z

! l9 q4 Q8 G5 D/ f  X( DRound 3% A/ ]0 ^/ @" c; S; G
7 vs 8 = 7 < 8
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0 {* G/ N0 m5 C$ W8 GThe answer is 7.
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e.g. #3 假設13為較輕的一粒
* f2 h1 ~1 m0 YRound 1* h# R( f! N3 k) ]% j
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
: s7 u5 x8 \6 `, c8 T+ K4 S- [; E* v; \# I9,10 vs 11,12 = equal
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No Round 30 J6 F) X8 G) i9 R; R3 p$ d0 p3 l
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The answer is 13.0 ]  l7 o! N8 x( e/ J. o( L

  U! n# F% L) i. Y% C0 Y6 F) X" p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:# n4 w; \! C; N
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1-6 vs 7-128 z* |  t% e- V2 u
if 1-6 = 7-12     13 is fake7 S+ I6 `/ L. p5 v/ M# Y3 |) v5 M! w

4 N9 d* E/ C! @) _7 Iif not
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2 ]# q3 d0 Y; l! o9 r& sWeight the 2 time
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Suppose 1-6> 7-12
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! m- W# r6 P5 b9 m8 e- @; Y- ?1-3 vs 4-6 ( P1 C4 B; W: k3 ~
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Then Weight the Third6 H2 b- D2 n; V) N' I" Z4 n
3.4 a" Y# h& J# f1 S- {5 R& F0 v# Z

1 W" n2 G8 z7 uSuppose 4-6 > 1-3
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+ e7 i& M) _* }/ `) ^! GJust like the first Step
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4 vs 5
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2 ~+ v$ g& J) k7 r3 qif 4=5 6 is the fake one & K( ?% M3 G" v5 ^) d' G5 z8 H

7 y& V( c. F2 A/ w) xif 4>5  4 is the fake one ; \1 s3 |9 q% |! X; ^
and so on......................

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問題第二步
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% ~- k, s5 x" }, u5 O3 W. rWeight 1:  1-6> 7-12! ~/ U% {* \5 b  o% ~0 E# o6 I1 `5 e
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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???# F& g& Y4 W  O* N$ |# F
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問題第三步, E! L4 f2 A, R. e+ _9 E
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Weight 1:  1-6> 7-129 \. }4 y4 E$ p6 S

  P' X0 j* f; [/ X0 }2 G8 N- CWeight 2:  4-6 > 1-3 * W+ c, j4 o$ H# m7 r! [

2 |; D( Y# @; x+ z; s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