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 k. A/ L" A. \& M2 y
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？』( v( `2 o7 y' x$ N! L

7 `4 H1 c  J) d) P注意: ; I' @( [# Q) R1 V6 s- q! M

& T; h0 j8 |! b1. 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8 L. x) \' G0 S# n' f6 x

' P# \6 w% s5 K2. 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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7 v' |+ A' @4 ^# P. d' ~# v7 X[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:: v8 W0 n5 c# v+ ?+ b/ T
相信e條題目都有吾少人玩...

: U2 J' o8 h6 E( [% a& Y8 L3 L我以前畫左個chart去答,
7 O! E5 X" ]' I7 y' z2 Z+ X# |等我搵下仲在吾在
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1 [8 ]. W! H+ ]當日用左37分鐘答１２粒波子，差７分鐘才合格。
! \5 |/ I* p7 C+ m$ z  ?" z13.........  g2 I: z. q% f8 n9 F' N

/ o4 n# _& L" b/ ^% L/ N# V1 K[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:) P+ B8 A" a" m+ y7 e1 _5 w! E
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我以前畫左個chart去答,7 d, O1 C6 H  H$ Z! y" c
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 J2 O, C4 b- e9 p1 y- R. A唔識隱藏...已經諗到..

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$ ?. C9 s5 W7 J; y! [1 i+ ~3 Bsor !!!....e加改左. r2 h$ v9 H% a% x1 d$ U9 C

! ?2 S; [* f8 p2. 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0 t0 L$ A; i4 A9 H* b
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:. y0 ^8 k2 t) `4 g8 l
相信e條題目都有吾少人玩...

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0 K6 R" U& u5 y. fPlayPlay, 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:5 M. A. _: Z" X8 J
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8 l& P% a7 F% G" v) m1 ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) w/ U! v" ?! `2 X) cThanks

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. X, e1 J& P3 [不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
1 g: J; Q/ X) L9 r: W3 k. [; G' d1-6 vs 7-12
& E$ c: L* ~$ Y  w( R$ Eif 1-6 = 7-12     13 is fake9 p2 x; m! S0 X2 E5 }9 ?( J

" z) k# }2 ^2 V! ~5 I& V7 L& hif not
% f( D4 x3 j3 g8 ^8 \
- F  H3 {) M5 ^: q+ n+ ?0 D& n# }9 fWeight the 2 time
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Suppose 1-6> 7-12* u$ `# y. @6 N9 j  B! j$ b
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1-3 vs 4-6
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Then Weight the Third/ W! o9 h% B* m3 v& [, h9 c! B
3.7 u/ O( t5 ~- d& i" ]9 P6 S

! C' A# `6 g5 @" xSuppose 4-6 > 1-38 D1 A1 @& R8 G3 m- A; P
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Just like the first Step# M) K. D" o# O
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4 vs 5 3 {- z8 V' S: |

/ y/ w. K# W( t  P1 e8 Bif 4=5 6 is the fake one
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if 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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- x1 u# Z8 Y+ x( uGroup A: 1,2,3,43 Z6 Z3 I: `( o. ?3 u  P
Group B: 5,6,7,8
4 `/ g4 i9 n( V$ f! R2 z+ qGroup C: 9,10,11,12
2 O3 K2 Q- h1 c( M3 NGroup D: 13
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8 |  s7 }0 M7 m# g; X5 ?+ tRound 1- t* J4 K$ }, s6 b& \4 K0 k( n2 j. p
Group A vs Group B
  j' J: S  O! L3 l! E; R3 e如A and B一樣, 即較輕一粒在Group C or D/ h# P2 ]8 f! G- s

* s8 q+ D+ m' ?9 Z( s# tRound 2% T6 P2 n& r# f
再在Group C拆成:
0 ?5 l7 L+ j) w! T- u3 W: kGroup Ca: 9,10: _8 G' |5 }7 c7 ~" `
Group Cb: 11,12
3 A  q4 L4 H/ N* d2 |! b然後再秤, 如一樣, 即13為較輕一粒.4 x; ^$ h8 Y- j; I/ P1 k

+ ^8 S# l# n" K" N# t如不同, 即較輕一組有一粒較輕波子在其中,
# y; B) P* S" t& r" V) R- A要再秤, Round 3, 之後便知答案.9 M& Z" ]+ Q. \* C* }

9 Q3 d% |3 T& h9 J! f$ e) T# C# Ze.g. #1 假設10為較輕的一粒/ S( O0 R$ C; Z8 b0 }
Round 1  r8 {  h4 ^5 k6 h! |
1,2,3,4 vs 5,6,7,8 = equal+ n- ]9 U4 M7 d! j$ f( O
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Round 2
, {  ~) c4 a) c/ {' p; p; E9,10 vs 11,12 = 9,10 < 11,12
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) t7 @* s+ B* l" \! Y3 j' cRound 3
8 q) B7 A8 ~$ \' d- X9 vs 10 = 9 > 10
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The answer is 10.) V! m% y2 I4 {1 l4 j+ E
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e.g. #2 假設7為較輕的一粒
; _5 p. k3 u- ?- x# s  {8 X2 x! b* ARound 1- q# y7 D+ b, a, S+ D+ w% u  [' U5 ^
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
' N. J& a* t0 T  l( o6 }  _. P/ t. n5,6 vs 7,8 = 5,6 > 7,8" Z! L- g' S$ f' G  A

, q' h; O$ Q; X* j. M% B2 `Round 3
6 K) g& m! z1 v7 H) V7 vs 8 = 7 < 8
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The answer is 7./ f& S$ P. p: X

% g8 }9 r  O2 d- Qe.g. #3 假設13為較輕的一粒
  n( n( y1 i0 KRound 19 C, }" ^. [% u/ X2 ^8 L
1,2,3,4 vs 5,6,7,8 = equal  P# D3 u- M5 Y1 _) L' d

" q  e5 u; R5 @- F. P+ cRound 2
" w6 s. o# F, ^% `9,10 vs 11,12 = equal
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; |( t; S0 Q% ~: {5 J3 s/ QNo Round 3
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# V( T* w7 k- }: g  _8 zThe answer is 13.1 ~' ]3 {6 z0 C5 f. w6 d6 o
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唔知我答得正唔正確呢?! 7 L, R" m8 h1 B* L
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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:
$ g2 h% h8 B; X1.
3 y1 h0 @* E1 }1-6 vs 7-12
% y  x1 f, K) b4 ?7 z% o7 @if 1-6 = 7-12     13 is fake7 R$ M6 ?. Q) k; k& N
$ l0 G. U: y# u3 A
if not
1 J# I* k& K+ ^$ N# v
. q+ j+ r1 p) M6 uWeight the 2 time # V8 v! b7 ]' |4 H0 a! ?
" [, B' `8 n+ m2 t+ Q
Suppose 1-6> 7-12
" v7 t" v% `) Y/ o7 \1 \# A  u, j  M  t3 M: e1 p2 k: @% f
1-3 vs 4-6 , v7 f! S4 h. F- l3 y0 S- y0 ~2 [
% `: ^5 j% k4 Y, \# |; p
Then Weight the Third2 _/ D$ U1 Q; u$ A; q
3.
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Suppose 4-6 > 1-3
+ ^  ~# `3 F/ G0 s1 x8 L  s
, {1 M# V8 e( G& v0 @% u. HJust like the first Step+ D) M8 _$ D# U

3 |& T6 S8 O& L* z1 C5 {( E4 vs 5 " l5 `* h4 z5 @7 z: ~7 c

6 Y$ D. ]7 f# \if 4=5 6 is the fake one
5 C' t/ }4 i: d3 j9 ~, I# d  c5 N% {: G, \! Z( t+ C& _6 Y9 ^- K
if 4>5  4 is the fake one
7 T5 O, b8 S8 J6 vand so on......................

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問題第二步
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; d# Z+ n* o1 I$ v$ e4 s& BWeight 1:  1-6> 7-12% ~1 c/ X! n) a1 d

# n  W$ o) I6 N2 V1 u$ DWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6, {) e& @* \) ?" D$ v
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你第三步点去搵 7-12 边一粒???
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7 ]. I- z, u6 X3 U' }# ^問題第三步  U+ E7 K, M, ^' f8 v; F; e2 }# u! c
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Weight 1:  1-6> 7-12
# D$ H0 x2 A( B1 t, R- Y# l/ ~# O; L, \+ C' _; H: V+ W* L! V
Weight 2:  4-6 > 1-3 ; O5 q; ?/ v- W! y. U
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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