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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& z5 r! e6 e+ B  o『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 t! K1 B! G& Z; }; F0 @" M
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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注意: + ?  W# c6 F0 A; f- T

0 |' t) h# X. L1. 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. {! \( J; x" ^* ]4 S, s

' U" h) o; v! h6 e6 q! Z; n[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:5 P- z- X" h: ~5 T
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,
' r7 z& E0 S  @" H5 y, B: \& Q等我搵下仲在吾在
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1 _/ N$ F# `: A當日用左37分鐘答１２粒波子，差７分鐘才合格。. _5 X+ z! ~( G. |4 f# q( M
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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! s9 Y6 W$ r  k7 ?: N+ M我以前畫左個chart去答,- x9 |1 e* F$ ]2 u1 w, g/ j
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:
2 A" _- V% A0 a唔識隱藏...已經諗到..

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& t$ ^/ |. b$ e) L8 zsor !!!....e加改左4 ^/ @$ T4 t5 c' V6 h  j  j
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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3 {, Q) Z( r* S* q! ~# C

& d2 |3 g9 P: q5 s, M[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:9 [2 a$ @, ~8 l& Y8 E- @2 Z, H4 O
相信e條題目都有吾少人玩...

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9 z! a/ {: ]+ R( Z5 [: ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.* k; S5 }4 l) C: Y

, E* v5 _1 l; ZThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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0 g6 \- L. j* m1 m) I' h4 \PlayPlay, Let me know later who has the right answer and I will add points accordingly.$ M) L6 t8 O7 w; s

9 u! r- P0 R/ z) x( Y2 [1 X6 IThanks

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: {/ r* i2 S* y. M2 D不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
* q% Q, }' p3 J' N1-6 vs 7-12
2 S8 X; N+ P5 B" G) p% {2 O/ F, _if 1-6 = 7-12     13 is fake; V$ b: j# E3 |3 q! _
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if not 8 e9 ?4 ^- g% J8 e5 z, K

1 A  S" j' p2 @  RWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third4 ?0 y+ H9 \4 s$ T9 V) C
3.
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, {" ?' `( p) G! ~; ?$ M# Q* Y) DSuppose 4-6 > 1-33 X9 |8 b$ I) H

) k6 K  }( p, |% HJust like the first Step  \7 U5 h$ H. a% j6 ~
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4 vs 5 ) w2 s5 S& E: t. w
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 3 Z  t0 y8 Q- G" k1 @7 z& \8 f
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,49 O: a: i6 e/ X9 t7 \" T
Group B: 5,6,7,8
, \8 ?# _5 _, KGroup C: 9,10,11,12
" w; ^5 c- L  G: TGroup D: 13
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) n7 Z( \6 f- r6 \( \& W  ^, NRound 1
' i- y" }) j7 h3 G+ PGroup A vs Group B; Z% h; {* p4 V+ \  T
如A and B一樣, 即較輕一粒在Group C or D
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1 r" |+ T' A+ b& Q9 N" Q) o2 ]5 n/ fRound 2! P' V2 E- b; d, k
再在Group C拆成:
* R1 w" K. }2 f+ h, QGroup Ca: 9,10/ r# M) m1 y/ t7 _8 d
Group Cb: 11,12
) W3 a4 Y* S! S: v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,
0 ^5 {  C9 B; ]; H5 n要再秤, Round 3, 之後便知答案.' N! V! j4 i0 g/ I

( e9 `/ [6 ~& J7 ae.g. #1 假設10為較輕的一粒
; m* e$ g2 V3 Q! v% `: [4 pRound 1( J% M7 D7 I0 t+ \
1,2,3,4 vs 5,6,7,8 = equal
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Round 2% @# z  n  R) n# r5 [$ _5 L$ ~
9,10 vs 11,12 = 9,10 < 11,12
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$ {  U8 @- a9 Z3 J6 kRound 3
* Y3 y' @3 X# \3 V; S$ g4 s9 vs 10 = 9 > 10
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+ Y# ]- r5 D5 n& b: tThe answer is 10.
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e.g. #2 假設7為較輕的一粒% G0 n( d4 k5 d6 o% w5 c4 P
Round 1, y1 u$ x' d  C- b! o: T) W
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 W" i) L6 I1 t; f3 k" m
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Round 26 O7 E& @; t( V0 j6 X
5,6 vs 7,8 = 5,6 > 7,8" a4 R/ l5 `/ K  w3 K
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Round 3! O4 ?; x9 z8 A+ T' k8 i1 x# \
7 vs 8 = 7 < 8
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; g7 S: W- R$ d# V8 {; [The answer is 7.6 _# L: X/ n' f+ x/ w% s
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e.g. #3 假設13為較輕的一粒
* h3 l# ?  [- X* ~, d2 I9 d: {Round 1
$ A3 p. f8 @5 O, p. j1,2,3,4 vs 5,6,7,8 = equal+ V& L" d8 T- l! {( b+ k

5 h: K+ ?1 x2 s$ R4 g6 DRound 2
* y, _# s$ `# u2 {7 c& N9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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' X3 B) F% x0 j/ B唔知我答得正唔正確呢?!
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$ {6 v" }9 e; X0 B( f1 ^  _[ 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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5 `/ o4 T* ?& l5 u. k/ `  Q4 F1-6 vs 7-12! w+ p  T3 y. A/ y7 o/ m4 D
if 1-6 = 7-12     13 is fake
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Weight the 2 time 2 G3 Z% z/ x( J$ T

, q; i) |+ Y/ m0 B0 t# }. k1 R* fSuppose 1-6> 7-123 @. U- |: z9 B' u& X% p% i- \/ v: T

/ Z( s  b7 b: K0 Q1-3 vs 4-6
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3 @( o% q" T% n( GThen Weight the Third, k( }) Y/ @1 B. m/ y9 r
3.
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! r. z; v  \! `* E/ R$ P6 D0 zSuppose 4-6 > 1-3
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$ Z/ l7 D6 P0 ?  S$ YJust like the first Step$ G+ D9 p# s# p

( V( q$ w3 A$ C4 vs 5 ( \" T( _1 S3 t$ ], p7 K4 C% w
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if 4=5 6 is the fake one
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0 U8 k+ Y4 R) p) tif 4>5  4 is the fake one
" l" f% [7 {' H% `# Xand so on......................

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/ N- n0 c: {6 H7 |8 [8 z9 @問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6% U% I9 Y( h9 R

& z7 G: j  I5 h# f0 u你第三步点去搵 7-12 边一粒???+ e5 {3 ?' C0 R. ~' H3 Z$ H+ p
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問題第三步
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1 k1 I" E0 ^9 e' U2 hWeight 1:  1-6> 7-12
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/ A) j! O2 F7 K4 tWeight 2:  4-6 > 1-3 " \2 `2 g! b+ Y$ {

' e, E" s% w+ C4 r3 x# H4 @7 S! F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