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0 Z3 v/ _4 {! {: O3 D

+ Z+ i' ]! N( w; J' W  {; s『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)。  h' G9 k: h( c
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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0 }/ d1 n; ]. g* z6 ?8 l' W  A7 _注意: ! K: F6 H. d1 z8 p
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
2 N& k# f. l5 q* Z相信e條題目都有吾少人玩...

- [9 d! r# N" |1 C  X我以前畫左個chart去答,5 N+ N* q- c5 E! M, |8 \5 s
等我搵下仲在吾在
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& V8 Q8 Q  I% q$ x$ U) A當日用左37分鐘答１２粒波子，差７分鐘才合格。
, J' g. M, |$ U13.........
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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:8 F# F( W4 t$ Q, @
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我以前畫左個chart去答,. |- R  f9 E4 q$ z) U! F$ s- m9 g
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:
% j2 _) y* }# P/ v) j- ?1 L唔識隱藏...已經諗到..

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( }% Q; D" w3 O( V. U  V- H: N- h) Rsor !!!....e加改左
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/ {, J  u3 r# z; v7 O2 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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1 {3 m" K0 H% r' A( s% j[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
$ }- p/ _& ?% T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.( h8 w# m+ L8 W

$ \+ ^6 V2 L7 U' {* D9 J! m3 MThanks

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.
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Thanks

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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.  v9 x/ @+ g) n# K: d+ e' V: X
1-6 vs 7-129 y! Q7 E" A# ?. M. \7 y6 [# P
if 1-6 = 7-12     13 is fake  [! d+ z$ i6 q% |, G

& S  k' }$ Q% G9 @$ h# aif not
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Weight the 2 time 9 ~& B2 q+ c; F. A2 l

+ R# O0 a6 F' ?( N2 XSuppose 1-6> 7-12& R( y2 ^& H7 y& \- O% |: }% o

5 V- S1 g% j+ C8 k; k0 {1-3 vs 4-6 2 v7 d6 f; A# K
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Then Weight the Third0 G  w! m) W; S# K0 R9 Z0 C* ~
3.
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2 Y" D) k3 R  u1 _! y+ ISuppose 4-6 > 1-3! C( m$ I( j: `7 d5 f0 e

+ n9 ]7 h, Z4 M- RJust like the first Step+ {" ~% I% \5 x$ F6 H* o0 I% J

( m- N! E7 D0 J' |4 K3 _9 e% e4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 4 o# }  f0 h, K) p

$ k" @0 I0 c8 @; g% R, ]and so on......................

hello1997

分3組4隻波子秤6 ]8 B# T. I8 T: Z3 q7 M& Y- N/ l1 U* _
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Group A: 1,2,3,4
. R( ]: R3 l/ s0 }3 i8 s! K3 M% BGroup B: 5,6,7,8: x" ^) i, G$ W3 T: T) c5 s
Group C: 9,10,11,12
1 P. b" D4 \' b. [5 m% C! m; ?- RGroup D: 13
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Round 1
; X* G6 J4 W) m! V, SGroup A vs Group B7 e# `) p9 c2 E1 }) m# G2 B
如A and B一樣, 即較輕一粒在Group C or D  X9 F2 j) D, b$ z. ]

) ^+ F6 W( z8 `0 y# WRound 2
) r8 E* J' l! p0 M( v" j% s+ ?再在Group C拆成:) _2 ~/ S9 b! i4 b+ |7 J) b
Group Ca: 9,10
( O8 |5 g  l5 a! \  ?* ~8 o5 wGroup Cb: 11,121 Q# }" S' ?2 J; e( M8 w$ C! i  I6 i8 G, i
然後再秤, 如一樣, 即13為較輕一粒.
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2 C( {' ]/ m, d; ^. h如不同, 即較輕一組有一粒較輕波子在其中, - e+ K8 j: m, H# L- X- Q* Q
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
  g" T, Y  t; \9 }Round 1" j- ]$ ?. j& |, j" ]: ?
1,2,3,4 vs 5,6,7,8 = equal# u! c. V1 l9 `7 ?9 L

$ r  o" c( w( B' T* Q# W/ sRound 2+ ~2 d: t& X( _; |' v' B
9,10 vs 11,12 = 9,10 < 11,12# q$ z" j: P1 g- d: K1 U0 q9 l+ P
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Round 3
7 W0 T$ q, x. \- ?1 b% m, ~) u9 vs 10 = 9 > 10
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The answer is 10.& d4 S8 Q! F+ Z! e5 q3 b7 x6 _

" G4 D0 N1 [3 e3 D4 X# j0 me.g. #2 假設7為較輕的一粒
6 ]* V$ U: l  X) T$ kRound 1/ ?( i& X! Q# G5 @! u5 m3 K
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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6 m/ S/ x: r2 |0 d# `Round 2' P! o- [  `3 c' l: {. Y
5,6 vs 7,8 = 5,6 > 7,8
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: g) E2 y0 U; X- w' e5 mRound 3
0 q$ D; s& {" Y' X0 n- c" O/ l# H; D7 vs 8 = 7 < 8
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4 D" I% M; Z3 `. NThe answer is 7.2 V: `; {6 l7 y2 S; S& ?% `8 u

. x/ u5 W5 O+ A; B0 ne.g. #3 假設13為較輕的一粒8 S% r$ H! {5 ?2 V5 v
Round 10 c* B% ^  J% A# n$ _
1,2,3,4 vs 5,6,7,8 = equal* P# L5 ~, n* h- P, G$ i  m

+ P( ]; X+ V0 E  t/ lRound 2$ u- @+ ^9 \2 ^. K
9,10 vs 11,12 = equal  B! L: f: k# m3 n- s$ m6 S
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No Round 3( h4 ?3 ^5 E( l, J; p  r) J5 d4 A
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The answer is 13.. a2 ]% }8 M- q0 X
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唔知我答得正唔正確呢?!
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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:. F; T3 y7 d2 T3 P1 {6 v
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1-6 vs 7-12
9 M) t$ g8 s2 q  r! R& iif 1-6 = 7-12     13 is fake
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if not
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5 b6 p: N. l. ]) A7 Y! a! v1 DWeight the 2 time
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+ R* X# [" B9 K9 m: X2 wSuppose 1-6> 7-12
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! l. }$ X9 H+ Y& D: P+ L2 H1-3 vs 4-6
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. Y. y- y0 f- ~# U/ d4 hThen Weight the Third* ?/ q9 g, |$ A. s' n  B; h
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 3 v) ^' B/ q& y8 \3 F
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if 4=5 6 is the fake one : g7 L! k7 I" R; V# T1 l/ g

# |# N5 ^- S3 \' y1 _if 4>5  4 is the fake one
% Y' l4 `3 ~- p" R" ^, D7 M! aand so on......................

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+ D7 n: t' |/ Q4 X問題第二步
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5 Q/ i+ m3 M9 EWeight 1:  1-6> 7-126 e+ E+ Z" x5 l) [

; a8 T$ g: m) x: Y. PWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6& N, n! |& }3 D, ^  F' r

7 z  w. b$ Q9 ~4 J$ j你第三步点去搵 7-12 边一粒???
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========================================
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" [( q$ ^, K$ L8 [: y) [/ |問題第三步
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Weight 1:  1-6> 7-12
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+ I* ^  M" d, V" k3 yWeight 2:  4-6 > 1-3
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9 P+ Z5 j: W- j2 ?8 w4 n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