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)。
( T% p0 t; f: ~# M! p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？』) G* ]" [5 O4 t" T0 B

; s7 j% \( S2 R+ J6 R$ c, B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
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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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8 C# B2 _. n# f% ~  a; K[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 S, u  f, F- z7 h9 G& E; X' F: J# h相信e條題目都有吾少人玩...

. x. Q. o. t6 h+ N- Z& p我以前畫左個chart去答,; k' t& D2 J$ U, J& \# R1 e$ N) T
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
. d. w: [( G+ q/ n2 v7 k7 ]' |' N13.........
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4 S7 F% }, P9 Y. Z  ^6 A[ 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 C- o3 ~8 F; D. p9 Y
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我以前畫左個chart去答,0 {! k7 W! e' C* E" J# ?
等我搵下...

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5 J$ e1 X& c0 x3 d! a' e8 |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:
+ z0 ]* {* [' s; x, H4 N唔識隱藏...已經諗到..

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sor !!!....e加改左+ T5 F& x2 @: c$ `/ n0 a

6 o0 [: O- M% b+ c! d/ E2 l2 {) u2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
, X; u. Q* m) z. U! f" s3 W相信e條題目都有吾少人玩...

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/ K0 {. V( A1 D# c- E* s/ BPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) U! U3 W( u3 T0 h% c3 }6 R3 {) z: KThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 v0 J. y2 X9 c

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6 C6 V0 C  P: p! Y5 f: F% Y: S$ o' r) V$ cPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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, \# X* r! b; I" R$ F# G+ B* n6 oThanks

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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.  i* ?8 F* l/ N
1-6 vs 7-12
" p4 N* C; I! a) ?if 1-6 = 7-12     13 is fake. K% M2 P% Y% `8 T/ E
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if not 8 G  h" x( L) M. V( J& d

! b; |% k2 V$ ?& w7 T8 LWeight the 2 time
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" @8 T. \; W* A3 }; |; W# B- ^Suppose 1-6> 7-12( W4 }7 S; V! S% n* T. d2 D

& T$ ~; a3 k! ?1-3 vs 4-6 0 [  _* l# ~5 o% N2 R# C+ e

6 l& N8 b" J: o# H6 U4 x7 hThen Weight the Third  i8 Z) V& w* X7 W( l
3.
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# {2 \2 [( ]1 m8 m' }3 H1 JSuppose 4-6 > 1-36 a1 R! W+ k2 }: d/ r
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Just like the first Step4 H: s3 d- a- d3 N
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4 vs 5
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) n! w! S9 t5 D' Fif 4=5 6 is the fake one
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if 4>5  4 is the fake one 4 c- n$ X  R, v2 C0 B4 w
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and so on......................

hello1997

分3組4隻波子秤: e, \* ?* H+ m! ?

( {) J* Y$ p* [) h$ T# q3 CGroup A: 1,2,3,4
$ p( M* t$ \. G& k5 U% V% O+ {3 MGroup B: 5,6,7,8/ K8 k/ F& y6 s7 G" ?6 a
Group C: 9,10,11,12: B* t9 v) [+ p/ o0 h' Z7 o
Group D: 13
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$ @" ]5 p' Y: f/ g. mRound 10 x- N/ {# G+ Q
Group A vs Group B; e) c6 K- z8 j
如A and B一樣, 即較輕一粒在Group C or D- W' }* k4 w) d' J

$ {# o" {4 O: F8 E7 dRound 2
. |" W: D) e8 k& j+ I! J$ t: ?再在Group C拆成:
' u; ~# D3 e; i: m8 f8 c0 d. s9 O6 w% LGroup Ca: 9,10
% i  r$ T% k: f8 O  q. U0 s; C& bGroup Cb: 11,123 Y) }, t- B  V3 {. M' d
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, ( f6 C9 A( N7 P0 w7 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3 V8 ^- b8 Y* ?$ u, q
Round 18 X# Q0 U8 _9 V+ a1 ]
1,2,3,4 vs 5,6,7,8 = equal
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5 V1 |. @& D+ |) NRound 2
- H/ ]- R" J% @: n% o0 |$ ^9 b4 t: ~9,10 vs 11,12 = 9,10 < 11,12
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Round 3
; @: M2 Q% s5 F- I8 D# P2 w4 J9 vs 10 = 9 > 10" N* q3 T  k2 f9 Q& D9 l

! u2 M& \1 u: `3 L4 K7 [# W6 wThe answer is 10.
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5 {1 v# i" M& N9 H+ je.g. #2 假設7為較輕的一粒
. H4 _! ]6 _- c0 w9 |. P  a/ }Round 1
* o7 w% X: u- O0 p1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,87 d. t6 W1 y! K* T+ U
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Round 2
" t0 T2 \) D  U8 ]% P# }5,6 vs 7,8 = 5,6 > 7,8
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+ X6 V, k* Z- P2 s  D" JRound 3! L' P" I5 I1 {# s. c, D5 B- g! ^3 j! S
7 vs 8 = 7 < 8/ f" K* I5 ?+ g$ K" Y& R
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The answer is 7.+ ?( I4 y5 ?! ~$ p3 r

" C0 d0 J) O: n, |e.g. #3 假設13為較輕的一粒
& v6 y$ n5 C' v3 ]# eRound 1
# P* i. y! z- [5 u& f- ]: f: y1,2,3,4 vs 5,6,7,8 = equal
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8 o* T: b; R7 A2 dRound 2/ w, x3 N* M/ @
9,10 vs 11,12 = equal
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( n$ T' O, D2 E( U* I( L. mNo Round 3
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" M* f) Z( H3 D) w' K. n4 j% vThe answer is 13.5 p' \4 n- s. d$ {0 r$ q7 W

6 M) [- m2 Z% K) X. ^$ f唔知我答得正唔正確呢?! 1 b! y8 q% {8 G7 w) M

: @* V7 J, R3 h: I# Q[ 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$ J) l2 d3 H# o- u; n. ^7 @. v
if 1-6 = 7-12     13 is fake9 t7 K0 ?/ D$ q! |

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  C! f1 n, R% V$ G  ^6 v2 j5 p9 K& K/ D5 R. x8 |
Weight the 2 time
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. z, G, V' U; W1 B( m1 SSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third  o8 w1 c# R% Z: r5 t) L
3.
9 [4 n( I+ Z+ m; A' g9 V  I3 N9 X* H/ j& @# S$ Y9 q
Suppose 4-6 > 1-3! t' v; C' ^3 `

6 _4 g) i4 j' Q- zJust like the first Step( @, B7 }' d$ h) A9 B% X
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4 vs 5 " O  `: l* a; }* a; J/ E
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if 4=5 6 is the fake one : o$ t0 C8 d/ S- ?% R! C. o7 K
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if 4>5  4 is the fake one 7 I# ?* q0 B6 ~% U( ^9 k
and so on......................

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3 e- X8 {- h2 A9 t+ j  ^問題第二步
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( o! Q) j/ Q1 X% r9 X8 yWeight 1:  1-6> 7-123 F- Q) V, O5 Y2 r5 B
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6! D- h5 X7 B6 I

  K0 [9 f& |! B0 j; j6 i你第三步点去搵 7-12 边一粒???" N; `4 |& u: f0 A
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========================================
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  ?9 h' \9 S0 i3 Q- t問題第三步
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: ^/ p; L" l. V% W9 MWeight 1:  1-6> 7-12- ?! y* \3 D* C

5 L9 ?* G6 `8 F5 EWeight 2:  4-6 > 1-3
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. F8 l0 ~+ z5 R/ k6 ~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