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)。
1 [7 L- h# `; m, z; s* f# 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？』
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: L# H7 V0 x# c/ X注意: - Y# W9 Y# y* s5 o& f+ j; V7 S

3 w& f3 @& o9 I' |; N1. 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  O- T0 S. z/ `( O  q

8 V" l6 r2 r" q3 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' q  u, z" Y  ~: 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,' m  z  Q& |& N( t& u
等我搵下仲在吾在
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3 Q3 G" e# c4 l0 b當日用左37分鐘答１２粒波子，差７分鐘才合格。; |5 {$ c, ^) P3 t
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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, l0 x& D9 \1 @+ d1 K' q' k我以前畫左個chart去答,% v+ u1 }! \+ O0 t: @/ j
等我搵下...

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. m! b7 e+ A5 E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 M. Z3 u8 D0 e
唔識隱藏...已經諗到..

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' u. M1 Q8 q( N+ b+ q3 ?sor !!!....e加改左
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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( H0 V! H3 ]5 @% H

7 P% i, _3 I( X5 ^[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:0 z  ~! A( S6 z) x; y6 ~2 `
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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PlayPlay, Let me know later who has the right answer and I will add points accordingly." L1 ^, D! q4 R0 z) c, i6 ^- K5 ~' t
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Thanks

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) _! V9 M( G- F5 y& L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
9 ~2 E9 @; ]$ xif 1-6 = 7-12     13 is fake+ T. ?4 `, I  u5 `; @: R

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2 _- p% Q$ e$ u& c8 T: X4 r$ eWeight the 2 time " U. z/ r% f; B5 K. D

1 I4 _; y9 d  @3 f8 TSuppose 1-6> 7-127 ?# X# T0 b4 O
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1-3 vs 4-6
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, c, _) j. G, Q% O$ n8 l. V) w1 BThen Weight the Third4 @6 d, ?! i3 f, G; o
3., t2 S6 [9 O; ~1 b
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Suppose 4-6 > 1-3) m( T0 s9 I5 e$ E0 ^
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Just like the first Step# |) H9 S! I( V& l

3 S  {# x, S: H/ V$ J: U# p4 vs 5
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8 N  O! f, m/ j/ Q8 H! `1 yif 4=5 6 is the fake one
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& N! B. \8 r. }5 B0 J% pif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤% w9 _+ q# d' @. G; o

) M& V2 C( Z& `8 fGroup A: 1,2,3,4
( z3 {  G, {, LGroup B: 5,6,7,8: }" \: s) |- N, S
Group C: 9,10,11,12' J7 E2 s- `  O4 B
Group D: 13
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  x) x5 Q- o/ _1 uRound 1' f8 O: u6 B  Y
Group A vs Group B. g) k+ [8 z1 f
如A and B一樣, 即較輕一粒在Group C or D3 i0 D1 [9 P) C; H  v2 r

$ K: B% Z" t& f; W- ^Round 2
& [- M  f5 T7 [4 n# v6 x0 n: \再在Group C拆成:
! p4 Q+ K3 E+ s9 Q. D9 pGroup Ca: 9,10
/ e/ I" E/ n  }* `) L0 XGroup Cb: 11,12
7 {2 l3 ^  a2 p/ {, l; g然後再秤, 如一樣, 即13為較輕一粒.) y' C7 f8 N, D6 w5 |
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如不同, 即較輕一組有一粒較輕波子在其中, 2 b6 R& G1 w% t1 L# P0 C7 O2 x
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2 A$ ]' e% h- A$ O" ]+ O2 b
Round 12 i7 L) Q3 s- i7 p! k/ b0 l1 Q
1,2,3,4 vs 5,6,7,8 = equal! i; v! J! [8 c0 @1 h

+ @* \: |1 x  aRound 2
. k2 y+ J9 J  v* _2 @' ]9,10 vs 11,12 = 9,10 < 11,12
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Round 3
5 @  y$ T% M$ {9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
$ u) a% `0 d2 fRound 11 ?7 g5 e( V% t. _- A) _2 k
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 23 x7 ]7 K5 \3 m& Q  g, G
5,6 vs 7,8 = 5,6 > 7,83 m( @, O" b0 b% K
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Round 3! a1 N6 B) w% O  m2 w
7 vs 8 = 7 < 8
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8 L* W5 V! o' M! ^+ @# ]& W. _The answer is 7.
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; m% e' D& B" z4 ?( Fe.g. #3 假設13為較輕的一粒, u# X9 w; N$ I% R) ^
Round 1
! |" z. Z4 U+ ^* A6 C1,2,3,4 vs 5,6,7,8 = equal. j+ h/ ?5 W7 E% A

" v+ L& `. y" V2 \% ?Round 2' A( S  b, ~. m9 @( G: i3 A" P
9,10 vs 11,12 = equal* h4 W. b$ @" r" k% ~

7 h$ [  N  ^' [: G" Y0 ]No Round 3
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The answer is 13.) Z9 W  t5 H5 \5 }* S+ t  i
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唔知我答得正唔正確呢?!
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# y. D, b* e( q' D7 @[ 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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1-6 vs 7-12
$ B0 |! ]& e; y" P2 |/ ?- _if 1-6 = 7-12     13 is fake
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if not 1 p7 P( U. j+ J) i( |

# U* j* W$ e9 ?) F2 AWeight the 2 time $ E; B' I  M' ?! q

* Y, n" M+ {" w) W2 {; vSuppose 1-6> 7-12  ]" W: C8 I7 l& ]# X
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1-3 vs 4-6 6 P  k4 R4 M2 C5 R. X
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Then Weight the Third3 |% ?/ p$ ~6 W3 o) G' l
3.. D% R; S( u6 M/ E% M) F5 W% y3 C

6 h" n( U* N4 P* f5 {- BSuppose 4-6 > 1-3
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2 H0 j" D8 k- ^; B* ^- M' V) aJust like the first Step9 m. u& c& D. Z+ H9 L# c: g

. t9 v/ q" c  Y- S. U: S4 vs 5
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* t' a2 x# u- M+ bif 4=5 6 is the fake one ' Q# ]* H# p- |5 t: g  B0 `: a; K+ z
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if 4>5  4 is the fake one / y0 n! ^; R( r) `
and so on......................

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: T' C$ N" Y6 L/ o2 _$ S0 e問題第二步
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Weight 1:  1-6> 7-12
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! E1 Q: _# }/ S  L7 ~Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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9 u- \( o1 h" p. |1 h; I; o5 X& w你第三步点去搵 7-12 边一粒???
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========================================
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( f. b  h. W6 j" ^# g! T- S問題第三步3 U! f# c2 A% F. V6 H" O$ J9 K4 d

0 F" ^+ C& ]0 E( MWeight 1:  1-6> 7-124 q7 g( f' C) n

# M4 y6 S6 I3 o2 eWeight 2:  4-6 > 1-3
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/ m: W  d  \  W; d' C3 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