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7 C+ ~  C* X. ?# X9 K

9 l* L2 X, q8 g1 q2 f, d1 S『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)。3 T. v7 j4 a; Q" a
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？』4 l/ c# f& \( Q3 D% L. B1 p2 d
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注意:
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! v+ R- Y5 j0 |/ p2 S# O- r# I5 ]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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1 e/ |3 a' [( l* O* q! t* v2. 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, j$ d9 `! G4 b) g8 j

+ N) i" n* L" l2 d) p! V  w[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ B) L  a8 n: z+ M8 r. I
相信e條題目都有吾少人玩...

; |" o2 P. L$ t1 K: X我以前畫左個chart去答,  Y9 D0 M. @9 ~& r$ t+ z9 u8 Y  Y
等我搵下仲在吾在, V( T2 u3 K: w  s

& K2 h' z* g  n# a1 T% w/ r當日用左37分鐘答１２粒波子，差７分鐘才合格。
) n9 n; I1 {  {/ k8 r13.........
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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:+ B* y1 a4 a; Z

4 K3 k! F: Q7 H5 N我以前畫左個chart去答,
  o9 z& Z/ F- Y& L; K) ~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:
/ |5 b" M. s1 p- q0 |, X3 c唔識隱藏...已經諗到..

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1 S: p" [' Y8 ^+ zsor !!!....e加改左
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3 j2 F5 }0 ^$ i* z# _0 x2. 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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$ f& \8 u4 B( |1 t% g4 u7 s[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
) l" ^) ^+ R  m6 k# I  D3 a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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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:5 \+ J9 ?: J0 ^1 R" ?4 _' ~3 Z

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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

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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.+ _: o1 a) p$ |1 @
1-6 vs 7-12  f, n+ V1 P- \& ^
if 1-6 = 7-12     13 is fake3 O# z: F5 p8 U! `( n6 Y$ [  t
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if not
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Weight the 2 time - @; H4 z& R& j. \2 w' O6 ~/ W( ~& {

7 k- q: M8 ]% Z5 n8 ?* P1 C, ^% rSuppose 1-6> 7-12# }" M8 s( W2 h0 }7 }0 p% i, a9 d
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1-3 vs 4-6 ) b# i" ^* w0 N7 E) m/ P

7 z& M, k+ k4 @7 r* F$ U: A/ ]Then Weight the Third, z+ Q; N% {4 a4 _: b
3.
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. r' t3 a7 c0 n& lSuppose 4-6 > 1-33 `* P9 m3 B  O" u
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Just like the first Step
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$ [3 {( u9 F5 Q* `  [: y' r, }1 v+ X4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one , v( c( j% s% U/ U' b
3 r2 I3 ]5 s- s9 ?- v2 x4 f8 O+ I
and so on......................

hello1997

分3組4隻波子秤8 B, R9 }) X9 e* A
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Group A: 1,2,3,4
( ?9 H  y% K' ^) V- {7 l$ k' tGroup B: 5,6,7,8
8 `# v. s/ N9 `0 {6 \: }. gGroup C: 9,10,11,12. g+ d- S+ U) P8 ^
Group D: 13
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Round 14 s9 ]5 h, O/ B1 r+ O* t* r
Group A vs Group B
3 u. h+ {% |- i如A and B一樣, 即較輕一粒在Group C or D& m$ [6 I+ D! }4 R9 k
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Round 2$ S% L- G- @  w
再在Group C拆成:) q$ s. a, F! r# Q) g6 C; ?
Group Ca: 9,10
. E6 Y3 M$ e& \" I) o4 ]8 SGroup Cb: 11,122 M, i  ?5 H. W8 }: f- z1 Q4 v
然後再秤, 如一樣, 即13為較輕一粒.4 P3 Z+ {( X7 k2 r- g* M

8 V! a1 B7 _' _如不同, 即較輕一組有一粒較輕波子在其中,
6 V3 e9 p. L% w* H" S3 l$ F要再秤, Round 3, 之後便知答案.
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& G5 I, H% l' E% H) j& |+ m0 be.g. #1 假設10為較輕的一粒* b- L! E! s) w# ^+ a5 [
Round 1
4 G( L/ j3 V; M& w6 Y6 x" E; v1,2,3,4 vs 5,6,7,8 = equal
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Round 2
  G0 W. ~. U9 E/ w6 y) ^9,10 vs 11,12 = 9,10 < 11,12
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Round 3$ Q1 i" k  d5 \' M. K2 ?, \2 V
9 vs 10 = 9 > 107 j6 D6 \5 n; N& u
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The answer is 10.
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e.g. #2 假設7為較輕的一粒2 R# J0 g4 K9 C2 m2 y
Round 1, i" R4 {, t7 P& v
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5 Y, q7 @& d, |- h4 H' vRound 2( B2 h5 b+ {% [4 j
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
# Y) j# {; G& p7 vs 8 = 7 < 88 W; D1 i  Z# D& R  k+ e* F

9 L# G1 s8 X; q( B1 Q2 RThe answer is 7.% Y. U( o( h. L% t# r* T

( B# Q( R& O" I4 ~7 P' Z! x5 S6 @e.g. #3 假設13為較輕的一粒5 T9 d. p- A" f( B
Round 1
5 ?8 V9 z4 I& q: C1,2,3,4 vs 5,6,7,8 = equal
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Round 2
/ R+ f$ u  J' |8 o: i5 ^$ J9,10 vs 11,12 = equal
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No Round 37 O1 x/ U, @" C! E7 ?

2 g8 c; v! i: G* T, F; v' VThe answer is 13.1 W6 g) n. L  a+ ~" }  N
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唔知我答得正唔正確呢?! # M* Q$ c* c% o+ P7 ]9 I# @& w$ H

1 q6 i0 y4 V7 g# Z6 E: D[ 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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0 w! r/ K* y* f  L  R0 W1-6 vs 7-12
! t' s2 N$ k, w9 wif 1-6 = 7-12     13 is fake
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if not
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9 L, ^6 W+ ~9 @) |- p: ?Weight the 2 time
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Suppose 1-6> 7-12
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  G/ g) K) o$ u& S( o3 s1-3 vs 4-6 * W1 X4 V  ~) G! R1 I7 F
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Then Weight the Third
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Suppose 4-6 > 1-3
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2 v+ c- D: G" p5 o/ |: V1 TJust like the first Step
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4 vs 5 0 }) z3 g, S! c3 B9 H* b
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if 4=5 6 is the fake one
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5 V5 n- ?* r, P4 o; e9 [& Y& U. ?if 4>5  4 is the fake one
& Q7 i$ G# O% o# Fand so on......................

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問題第二步
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/ q: n/ i" M7 o! wWeight 1:  1-6> 7-12
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/ [$ S. X2 T. X) B) W1 i# LWeight 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???
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========================================
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問題第三步9 C9 _) x/ {, g' @( Z& Q( u( f1 ~* R
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Weight 1:  1-6> 7-12
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( p) e6 R2 ]1 _Weight 2:  4-6 > 1-3 8 a% l) _2 E- 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