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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! H" h0 E$ m( d) O/ u, r6 O. H『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)。
0 @0 x; j: d7 w, r2 H$ N0 z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？』* }# O# [3 G( m+ Z0 i9 d9 U

; z" f. ]3 U" p4 p) t) ^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. h, y1 K  ~3 ?3 ]3 q* q( y
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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
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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 21:34:4 L2 b( V; _% b  f7 y
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,
' t6 o. v% J1 B, ]/ n等我搵下仲在吾在; r: F/ w  A+ ~, V& u& q/ @
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當日用左37分鐘答１２粒波子，差７分鐘才合格。  L) d' [0 S0 w6 A# s* a+ N6 a
13.........; E( v1 [* C& n6 J0 _4 _

8 p) w" |0 d. N# ][ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:% ~3 `, v: m) L, N# M
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我以前畫左個chart去答,
. s1 E* r1 d. R0 r- a* J) S1 ~2 D8 H; o等我搵下...

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) n2 m. H9 z/ G0 o2 q/ S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 [. {$ Q/ W) `& C9 O: o
唔識隱藏...已經諗到..

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3 r4 Z, e) G1 V, i7 k( i3 `" V- G4 Usor !!!....e加改左( ?* W8 e, X1 ?+ o/ q3 q
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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8 c1 d6 ?# K) }3 T. B- d1 h

9 |) G: z; c% `  E; K' 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:
& n+ O' u5 L) E; w* B  L, f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.3 f" I  M9 a6 L' J
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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7 J2 X3 p" W8 o# QPlayPlay, Let me know later who has the right answer and I will add points accordingly.! ^7 m3 m$ R* M& L" U9 Z
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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.
. }  @% N7 l! m1 Z1-6 vs 7-128 F6 F) X5 x+ ^3 D+ t- F$ {* p
if 1-6 = 7-12     13 is fake5 F  k* J( C* ?# P; k" N
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if not + s) C6 [) ~9 O3 p7 D
  R8 R( _, ~1 O: p
Weight the 2 time 6 [8 n  ^' U: H( `- @" E

9 _' v6 F; y3 s0 p( A3 @; z$ N3 fSuppose 1-6> 7-122 S  ^& U- k  r; B9 N3 o
2 W3 n9 W2 q6 M
1-3 vs 4-6 ! Z3 D: E/ I! \7 }& O, _$ `
. }* A- i. s  }: B8 G4 C
Then Weight the Third& u1 u0 Q* ?; i* n8 E" O' |: w/ G0 @
3.1 S  l* w  U" |5 T. v+ K/ @, }/ W
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Suppose 4-6 > 1-3, w  U$ ?1 X4 `8 ?7 t
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Just like the first Step5 r% E5 i( Y! n' ~1 Z

8 Y' S+ M) d6 }  G; t4 vs 5 $ J3 K$ f) ^' z" k% {* D

# I# E1 Y# L0 p' m) fif 4=5 6 is the fake one 0 v. E$ B1 K9 \2 @+ ?$ W5 _

, w7 K, y2 Y' Dif 4>5  4 is the fake one ! \5 m5 T. X* u, v
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and so on......................

hello1997

分3組4隻波子秤; h! Q9 ?; {* Y% R- B9 ]7 P+ Z
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Group A: 1,2,3,4/ ~9 z7 Y' c1 a+ F/ x7 m
Group B: 5,6,7,83 N3 a$ x3 o8 X) z+ f7 Z/ \+ a
Group C: 9,10,11,12
3 U4 x7 z2 Z+ N( `/ nGroup D: 13
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Round 1
4 e7 ^. I3 N. p$ b4 ?. vGroup A vs Group B
! F. n, j: }+ s& l- `如A and B一樣, 即較輕一粒在Group C or D+ V: u/ X  d: I# y& |

0 g* _2 V2 ~( ^Round 29 z- q, `1 Y; j& i6 o
再在Group C拆成:
6 Z! u# Y& f0 t/ l9 t- ?Group Ca: 9,10) y4 \& n! g# o5 t
Group Cb: 11,12! C! j, ^1 r( b* q9 J
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,
! B9 E0 \& J- y7 t% J, F! y2 d要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒0 M2 _) `5 @* Y( R/ }) s5 ?
Round 1
; _! ]& E' A9 z$ \% L/ M. K. ~1,2,3,4 vs 5,6,7,8 = equal4 m/ P, n( }7 R( F, f9 V7 r
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Round 2
' @: }! ~. y+ D9,10 vs 11,12 = 9,10 < 11,12
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3 l, D* h; R; }( F* P3 r) lRound 3
) |) c8 z# h  l. g2 w' s8 M9 vs 10 = 9 > 10
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! D# v4 N  p" m2 sThe answer is 10.1 G# A1 h' S% B* ~' G
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e.g. #2 假設7為較輕的一粒1 J. q$ J# p$ r, M2 s2 }2 o. i1 _
Round 1
# }: U% [  m& i; k# Q+ L1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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0 b' Y, `- c  MRound 2
0 i: H; c- A6 W5,6 vs 7,8 = 5,6 > 7,89 J* t: Q; Q! g$ ^; z
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Round 3
. s# [4 h9 Z" H& Y9 R2 H7 vs 8 = 7 < 8
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The answer is 7.8 t, j! O+ ^9 s  c* X

0 W0 R, Z0 m1 A% C5 z% Z3 Ae.g. #3 假設13為較輕的一粒7 @2 x  |" h1 a. |  f; z0 m2 D( S
Round 1$ g' r: f3 X9 ?
1,2,3,4 vs 5,6,7,8 = equal
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7 m+ W3 Q9 u7 E! T) e  Q$ G' |1 BRound 2
/ B) _3 Y9 y& z/ j- z9,10 vs 11,12 = equal* m1 G" y) k: s9 ]$ l3 o& i

4 O' T/ E, w7 E9 p8 p4 bNo Round 3
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/ |. T1 H8 z6 W$ _  W& {The answer is 13./ r1 L8 I7 G; _. S
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唔知我答得正唔正確呢?!
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" Z+ {, p7 B4 K7 B: e# I- n; _& V( e- M/ r[ 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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: h) k4 c7 q* k- }* I  ]1-6 vs 7-122 U7 C7 M: J+ ?
if 1-6 = 7-12     13 is fake
! }: ~7 G6 [4 l1 _8 D/ i3 B+ K$ C- x4 e8 d. z
if not 9 r& q1 V. w  g9 s# n

$ q1 q/ m1 m+ K0 I# t& K0 L' i2 NWeight the 2 time 6 `. @7 I" N2 B2 a( J2 h
' j. a/ J' n# y" _& I/ _9 a+ ~
Suppose 1-6> 7-12& u. v6 o: s6 p7 N
% @9 n7 |6 d, }6 [
1-3 vs 4-6
) K# j* F: U3 K, j! s' X+ v' c! F
Then Weight the Third: N9 q( j. e5 Y: Q/ P$ c
3.
1 o2 r1 G( }7 H7 E6 y' E8 B" U* p4 u. ?
Suppose 4-6 > 1-3
$ C6 i1 k" p% B5 m, _
, _; C- H: D8 z  cJust like the first Step1 a- Z* x: j3 l. n# W  Y
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4 vs 5
# U9 m. d) ^; B* d( w- L2 D
$ X0 x8 I" L5 t" A& q' S6 pif 4=5 6 is the fake one
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! Y! f6 t+ U+ o: |: ]. a0 @& kif 4>5  4 is the fake one 5 N% h4 |5 \* [, m- A  W3 W4 }+ o7 ~8 B
and so on......................

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問題第二步5 [* F* O' B) m2 n, @

: \, ]( t- m! Q5 b& tWeight 1:  1-6> 7-12
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* m9 I0 B' f$ H; pWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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2 M( w2 F1 V! k3 m你第三步点去搵 7-12 边一粒???( V& R/ H( `; @/ V7 W
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========================================
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& T! Q4 ]( y8 T! f' g) v/ z( q# W問題第三步$ R8 I7 N8 B3 |: H# I7 U

& u9 a# J: q  z7 {+ `Weight 1:  1-6> 7-123 L! m2 k5 }" n

1 _9 k$ j. T) j# D' j( `  o% aWeight 2:  4-6 > 1-3 3 q) j9 u1 p/ j

4 d/ f8 h  a: [6 n2 c4 N( Z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