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 E- s9 p3 K$ [5 _3 I3 K
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？』$ R" s  p9 ]. I" K- \3 {

- _, Y- ?/ z: U注意: 7 s% i" a) d0 q1 I7 `  w

& L' f& c3 u0 G3 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7 e' r% R3 d: s3 C0 r' |
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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:
" n: t, p. e: ~5 {: |相信e條題目都有吾少人玩...

$ l: r. a* |- I( s7 t我以前畫左個chart去答,& ~7 j9 B( f) T) v8 }
等我搵下仲在吾在
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; A! U, N, u& _& K當日用左37分鐘答１２粒波子，差７分鐘才合格。
6 G: V  ?5 X5 W* s$ g13.........
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: R/ L! L8 T# y3 V& g' [[ 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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2 [6 {+ d4 R; |1 a我以前畫左個chart去答,* B# i8 k* n, N2 J2 a
等我搵下...

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* j0 A- B8 G; b  i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:: Z4 m% ~3 y' F' @
唔識隱藏...已經諗到..

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- A2 |9 r, _2 ]. Bsor !!!....e加改左
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# `' J, C/ c# f8 T+ G8 `# n2. 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:
' ~4 Z- a+ @6 A, W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.' V5 Q9 _) `1 \8 }0 D8 N- u) |, D. s
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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# p# D( F! q% i4 u6 ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.  m) d$ t. r# N1 n$ B+ L6 k: W

' k7 G2 @' @& S5 z( i5 M0 uThanks

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) X5 h3 C# h8 H% w3 k/ k/ V; h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 Q) b2 u4 [6 Zif 1-6 = 7-12     13 is fake
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# G* U$ C, f- u+ B) }if not
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" O: ]8 R3 O1 m' C$ W" p8 _Weight the 2 time
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Suppose 1-6> 7-12
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& W8 b0 I6 F8 z1-3 vs 4-6 ; U% p  Y0 v: T, A" v: _! F4 E

. L# Z+ h, e5 I, DThen Weight the Third
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1 ^+ {! `$ P$ G' }
, S" h$ }# v8 R! jSuppose 4-6 > 1-3  E: _* o2 U9 P2 R; x

$ |5 x* G, S3 n3 I) HJust like the first Step
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, x  r. G- _% K$ g" z3 e4 vs 5 3 R7 R; _8 I" B3 T( j

) B' Y1 Q, m6 @' P- Y# X, Uif 4=5 6 is the fake one
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3 r0 l/ f0 Y: Q& J( n- O6 Iif 4>5  4 is the fake one & P3 \6 h: R# Y% F, B
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and so on......................

hello1997

分3組4隻波子秤8 @* B* v. m" H( B8 P+ N
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Group A: 1,2,3,4
3 D! w# S" q5 y$ w$ jGroup B: 5,6,7,8% o! p! Y% ~: a) J  @# R2 y+ J
Group C: 9,10,11,12
( ~  O  y1 u% k$ }& lGroup D: 13
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Round 1
, {3 H. o& i. O; A0 Z5 uGroup A vs Group B/ q* d3 o+ d% e% ]' s3 A( @; s3 s
如A and B一樣, 即較輕一粒在Group C or D# p4 L# Q5 s" f  J8 x" [

5 A, n) k' X# q& {: `Round 2" ~2 |. s& [! L  q! I, L
再在Group C拆成:( a, |- |1 d/ w
Group Ca: 9,10
. U7 s9 [: S. u( tGroup Cb: 11,12
" U: I. G, g$ X0 U6 K3 R5 t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, ( t& M, g  Y. Q. Z
要再秤, Round 3, 之後便知答案.
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  U, {0 y1 U( E+ L4 y$ Ue.g. #1 假設10為較輕的一粒4 [# ?: Q: I' I5 S1 u( G
Round 1/ V+ g% ]1 o, U4 u7 E
1,2,3,4 vs 5,6,7,8 = equal' i* W  F) l& b7 p" n4 B

3 Y* {; I. J' G  O4 I- Y5 kRound 29 \7 E  U; O/ p' t5 O
9,10 vs 11,12 = 9,10 < 11,12
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7 s; H' e- b; S% ~0 X) o" h1 fRound 3
7 B+ b& g' {  i# `! Q  K7 R3 C9 vs 10 = 9 > 10
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: H& w6 i+ v' V4 SThe answer is 10.
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e.g. #2 假設7為較輕的一粒
" Y! n- L. G" P" Z& ERound 13 B1 K+ ~  c6 [! B/ ]1 Y3 H/ h
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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. H5 O4 R) n. C+ |" \1 H5 R2 vRound 2
5 _4 A1 {* O0 h! F( I5 f* p( D, [6 Z5,6 vs 7,8 = 5,6 > 7,8
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& X$ F' e/ O& Z/ K' aRound 3, p! X3 x$ z3 n0 Q$ O
7 vs 8 = 7 < 8
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The answer is 7.% r- t; }  Y2 `" r: w+ Z7 t

3 W! Y8 A0 c3 T7 N$ ]) `! ke.g. #3 假設13為較輕的一粒/ d' V$ d2 Z. ~- J4 l3 g2 \- w, R$ C
Round 1: W; q: M7 z# u# S6 e
1,2,3,4 vs 5,6,7,8 = equal" o* O) _2 T/ T" U9 E1 b" t8 ]
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Round 26 `, J9 y7 j2 [; G, C, e
9,10 vs 11,12 = equal
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$ v# {9 l- Q1 J! d8 Q+ m; U6 gNo Round 3
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4 Q( L2 R& C, G, Q& {The answer is 13.
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唔知我答得正唔正確呢?!
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; z9 z" Q3 O; z  ^! \- j8 c0 m/ s[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:+ K' b/ p. U2 O" t5 a4 ?
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3 g0 M7 k; I& S! c. h' v1-6 vs 7-12# z, r! P. p5 [
if 1-6 = 7-12     13 is fake' x" |; J. ^) T. J8 a
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if not ! ^2 c; P# s" f  t7 Q. R

- q% t: m3 I/ `- m2 `. hWeight the 2 time   |" [+ i3 H% b9 y

4 w4 d+ T6 F/ G3 O5 I/ X4 {% y2 Y6 ASuppose 1-6> 7-125 W/ [; H; D3 A$ R

. J# G6 `1 P5 M4 W9 L* b1-3 vs 4-6 $ l2 w. P8 J+ T1 Q

3 i, P; Q% v, M% ]Then Weight the Third0 C3 q% {) M1 r2 Q- g! n
3.
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Suppose 4-6 > 1-32 {) m$ P  o, X4 r9 ]' H; G

! K7 ?1 b1 T( ]3 O5 `3 n4 pJust like the first Step- Y8 P1 V- q: }0 v+ w0 @5 R

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if 4=5 6 is the fake one 0 I# K1 F: J1 w/ a/ z' K

( E( l4 B: l# E/ S5 A/ d5 Rif 4>5  4 is the fake one   k3 j6 s' ~& L) ?7 q8 E7 C
and so on......................

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1 x+ W" Y' N/ r7 ?) H5 I; h# m, t問題第二步- v% _  a6 z8 p: O

$ Z" \  }$ L; b% C, t7 \. e1 JWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???5 i$ ]7 F9 x" r5 i) y

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7 p. P: _/ ?# ?- I) @% @問題第三步
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Weight 1:  1-6> 7-12
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5 i9 A0 d' @, AWeight 2:  4-6 > 1-3 ( J4 k: L8 p$ M4 A
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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