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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『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)。
! ?; y7 c7 ~6 k% i- x, }; P# M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？』# B' U3 u) l+ X- s2 w& G

, H% O- d/ o3 D注意: ! S- i6 b$ k9 C

! O* Z  `  S+ P1 d( V  @3 J% u. y1. 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+ G% g; A$ B2 P

1 A4 H9 Y( M' a9 _9 f) B2. 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$ w' c; r& e9 @; B0 Q* y
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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:
( I8 f2 g: h) S- t9 @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,( X% H  Q* Y2 V
等我搵下仲在吾在, F- R0 m" [6 F. B" B

" X% [: h! g# @& V2 V3 D當日用左37分鐘答１２粒波子，差７分鐘才合格。
( j) ~$ ~( w2 t7 n13.........
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' Y/ v/ y1 J* O3 `  k; A4 P& ^[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:- v8 A1 h# o; z: u: Q* e! L9 J

2 V7 d" z& ^6 C4 G9 @我以前畫左個chart去答,+ e% N5 Z# e. m
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:( ]) e$ g* `& m& @3 ^
唔識隱藏...已經諗到..

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6 \2 s0 h' f: j2 E+ H% H6 Csor !!!....e加改左- Q( R; s0 _$ F/ {: Q' b

; g# w8 }, g* X& j% F4 J2. 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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4 l8 ~) q4 j! g' |[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
- w, e# l4 u4 P4 O相信e條題目都有吾少人玩...

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: ]% d6 \* A# L  `, P# V6 FPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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% F! z) A3 b" IThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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3 o/ F- ^4 j5 }% N+ s  ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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! K- ?% @5 P  Z, o$ jThanks

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- p# B6 W% D, t0 m+ _9 w& j不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
* B$ N4 h5 Y7 _* E8 U1-6 vs 7-12
( W# \4 T5 K& H$ f) P2 W% T1 Qif 1-6 = 7-12     13 is fake
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if not , J* j" d) K/ ~/ Z" m1 h8 Q

% v" O6 |% F. \1 z& rWeight the 2 time
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; P: W! }7 e3 p3 a+ W) YSuppose 1-6> 7-12# Y9 E% M1 r* [! Q, O7 D! z

9 b7 U9 @) a; H' T; C  N4 J1-3 vs 4-6
4 |7 V2 p0 @/ K) I' n* r- d; ~; L  B7 H" @9 j
Then Weight the Third: T# F# B, j1 E* [7 U( n
3.$ f, o' k6 g3 X& q" H0 Z

( L/ d9 r# l$ `* b3 z( C; ~" U, KSuppose 4-6 > 1-3; K1 f4 C: ~  v- I$ H
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Just like the first Step3 L3 w! I/ Y  R) D. l! U) w

9 R; S- p" k0 B6 S: c7 s4 vs 5
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if 4=5 6 is the fake one
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( t* H) f4 x3 [, O# kif 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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Group A: 1,2,3,4, B8 ~6 d0 E- E8 j& F& P5 x
Group B: 5,6,7,8/ n. W; i. k# _6 U( K# o4 [
Group C: 9,10,11,12
) x: ^3 t7 u' _1 h2 j* UGroup D: 136 ^1 H# ]# M9 j( R$ p

& @* R) N8 R  Q! p, {Round 1+ E' c/ v" X- d. Q) I8 j7 G
Group A vs Group B
1 U9 Z. a' B; e如A and B一樣, 即較輕一粒在Group C or D9 Q" D7 A( @& J$ S: y
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Round 2
9 C  k, i! o6 O  M再在Group C拆成:
5 z! w0 [0 N; \& D) ]Group Ca: 9,10
3 Y' d; F- y( ~6 T9 c5 r" Q6 i% ~Group Cb: 11,126 V3 R: n* {/ G* o+ B
然後再秤, 如一樣, 即13為較輕一粒., Q* w+ ]3 u' a9 I, Y
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如不同, 即較輕一組有一粒較輕波子在其中,
2 r5 n/ T( V$ p% g8 m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
8 @# e4 j( i. n4 H. R, eRound 1
) w: S3 V: v3 P, c$ c1,2,3,4 vs 5,6,7,8 = equal0 A3 t: J+ U5 {- P5 H  p3 ^
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Round 2
+ @1 l) e! d: f0 u* F. f& L+ d9,10 vs 11,12 = 9,10 < 11,12
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Round 3
+ ?- J) B, c1 L  {) K9 vs 10 = 9 > 10
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" k" L+ b- A/ x! b3 cThe answer is 10.7 ^2 J, O3 h7 b, h

$ I) r2 i$ b* u; w( ]/ S: ^0 m, _e.g. #2 假設7為較輕的一粒8 u$ P  B: ]# i5 K" ~2 Q
Round 1
' ]  C- ?" K: |" e3 i7 k" @" N/ X1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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( {  F: w  n3 L+ r7 {Round 2
  C# K9 P9 t3 j6 `5,6 vs 7,8 = 5,6 > 7,8
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3 F3 a+ b; V) Z. d: ARound 3, J* ]& `6 ]$ s  @9 ]8 q7 b
7 vs 8 = 7 < 8
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The answer is 7.
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9 P+ [: D( A. J3 f) \1 Ve.g. #3 假設13為較輕的一粒, D. E& Z5 A8 W; I) p- |
Round 1
1 d; A9 l1 ]9 N( H7 ]9 n; n1,2,3,4 vs 5,6,7,8 = equal/ b: y* w" M8 J$ x
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Round 2
. W7 X  T" A4 u- k. g, C9,10 vs 11,12 = equal
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' N# g2 ~* O+ T8 v% @. aNo Round 3; a7 H( J5 q# s2 s3 Y

6 ~, E8 V+ `) C& `. A1 k3 ]The answer is 13.1 a& S+ ?5 a5 a) P
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唔知我答得正唔正確呢?! 6 g: A! B, I- f: m6 J  @: Q) w' e# a

4 s4 T/ x* q9 H9 A! u3 I! U[ 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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$ i- m. T: Q8 ^  b: i, f' W1-6 vs 7-12
  K; d, s7 `& l' {if 1-6 = 7-12     13 is fake# X& r0 A2 h$ K3 P+ x

/ C) Z6 U) d/ o7 |3 _. cif not
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Weight the 2 time , B# I! h  h" ?' F0 D  w! F

' ~2 E5 Z  |1 z3 a/ l7 x* T7 wSuppose 1-6> 7-12
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1-3 vs 4-6 + K, v% B8 N* O. I) A" @

9 |& Z2 g3 p0 F9 [4 p& Q9 qThen Weight the Third& ]; b+ q. |8 ?- y/ S5 S* D2 }5 x
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Suppose 4-6 > 1-3
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) A+ A& L) \, \; oJust like the first Step
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4 vs 5 / I6 ]/ k9 x" j' N7 K+ R& e; x9 c

# [, Y( L( K- |if 4=5 6 is the fake one : a* y$ B: Z5 Y' j2 R

5 E" I& `# {  H- o) B1 ]if 4>5  4 is the fake one
8 ]- K% V5 l+ b- V: f7 C3 vand so on......................

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4 ~. s1 C3 Y) @5 s' I/ J" ~8 b# ~5 V% n+ A' Y% ]
問題第二步
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7 x0 o0 A8 u0 j! p% h, l" T- wWeight 1:  1-6> 7-12, w: K9 N4 f& s. k$ q

$ N" P& J& C5 H& JWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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8 ~" e" _. ~1 e5 r4 E- P你第三步点去搵 7-12 边一粒???
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========================================
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# I9 T9 Q) i2 O! m$ M) Z  C' A; T問題第三步8 j6 L. q$ y$ M

1 F! z/ F4 X9 m9 J3 \6 ^0 ~6 A, zWeight 1:  1-6> 7-127 w) t+ M; f9 ^% d7 |# i
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Weight 2:  4-6 > 1-3 1 x! Y' R7 F! |$ z1 [2 X3 A7 X
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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