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4 N; @1 Q; K, U# c! ~

! L! q: v& @# B( Q3 m( ~) P! l『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)。
8 B* s% d+ M; V- [' s& z+ ^6 v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？』2 i/ t9 j6 q# _7 o, z8 |. {# E- s

* G+ y' j2 K0 q" \! O8 _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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. U) Y5 X6 _# r9 ][ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:: R' x- y1 _6 ]) g) j( Z9 ~
相信e條題目都有吾少人玩...

- R" b1 G/ Y, R9 m. ]; D我以前畫左個chart去答,
, I. k' a+ l9 P% U8 v: A  O等我搵下仲在吾在% X- i3 i/ ^5 z7 I. l

7 K8 L; L8 C: G5 Q$ N7 P當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ r$ I5 z* ^! j  L, x" B0 D13.........
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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:( t1 M( d) j8 D, n

2 M/ n* W4 M3 g我以前畫左個chart去答,0 r* \# X/ v: [. H' D
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:
0 \8 v1 U5 \* [9 q) D唔識隱藏...已經諗到..

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sor !!!....e加改左; L# \2 M( j% b2 u- ]
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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# U0 W' T- ]9 B  Q) S% ]  |+ T
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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:
* ^) r1 T5 k1 c6 D! A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.4 M, X- g% `/ v' f- C: x8 `
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Thanks

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.6 q1 N7 N/ @" U6 I9 T+ P
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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

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1-6 vs 7-12. p( o* k6 H# e
if 1-6 = 7-12     13 is fake2 `! O  T* r9 A- o( c; ~3 `& B

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2 K9 P4 S0 `6 e" {; w: TWeight the 2 time   ?- ~- p0 Z5 `; [0 `6 T4 g* Q
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Suppose 1-6> 7-12
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1-3 vs 4-6 9 q) h; @  a5 J5 |6 v9 B8 w; x

: }) n  S. H1 j2 s/ r8 L9 M4 \Then Weight the Third
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8 F2 R2 r% R! t6 \- OSuppose 4-6 > 1-3$ b7 n! H6 N+ G6 u

! Q2 |( @0 N. }0 U$ W& lJust like the first Step2 R' f: H" _: Q4 Y8 n! J
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4 vs 5 8 V3 _+ k+ ?7 {% u; K: {+ Q" A( {
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if 4=5 6 is the fake one + |, T7 a- k( {; Y# M4 w
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if 4>5  4 is the fake one . h. U5 ~4 U0 i0 z# o4 M
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and so on......................

hello1997

分3組4隻波子秤) W4 w$ P# ~( V* ?; \2 F

5 Y. G" j% ]& X% O% Y3 KGroup A: 1,2,3,47 ^- h8 ~' O7 x4 S, K# a
Group B: 5,6,7,8
% i, d$ Y: f6 H; I- u# m- j  f6 lGroup C: 9,10,11,12
3 u3 ?7 g4 h/ p% a- _6 iGroup D: 13& v; U. D) {# z9 V0 H4 }

2 J, j- n# Y- j- \8 E& nRound 1  L" m6 H8 I- \" i; S
Group A vs Group B# A0 `- D8 h4 }
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
3 K+ b/ @( G# }" p- V再在Group C拆成:/ w/ N5 j# ]& e( o8 f1 [" `' b
Group Ca: 9,10
2 x% i9 O9 j, j* T1 `/ Y) m, wGroup Cb: 11,12
8 x8 B; w! t, A4 A' n然後再秤, 如一樣, 即13為較輕一粒., P. a% I, T( K; o; \

0 F3 f5 J: ~7 D2 Q如不同, 即較輕一組有一粒較輕波子在其中,
7 Q4 _: s# F: B) R; z要再秤, Round 3, 之後便知答案.- ?: @; h4 e# }' T
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e.g. #1 假設10為較輕的一粒
: l- _9 T$ N& G- V: q: F' ]Round 1
5 ^  I/ b0 o' g8 X$ _, E1,2,3,4 vs 5,6,7,8 = equal
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5 g* T  Z4 q% JRound 2
. ?- t0 ~) V) k; r$ ^9,10 vs 11,12 = 9,10 < 11,12
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& U5 z1 s) G7 h( FRound 3. H/ ~* o0 |" u7 \/ O& B* \- m
9 vs 10 = 9 > 107 h+ h3 f9 c0 @! @7 X5 ~
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The answer is 10.2 ]' _% T. J3 M& Y# b3 M2 p' r3 y  C, n
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e.g. #2 假設7為較輕的一粒6 B/ X8 U/ G3 [9 }- H
Round 13 H& h2 Z0 v) X+ s: Q% z
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; [6 J2 k+ Y" p3 X' m# `5 g/ ?

+ t  g( u3 D8 I1 ?) `) S% h" dRound 2
! l0 H! l8 ?& a+ I! \# r5,6 vs 7,8 = 5,6 > 7,8) t% p$ M$ E4 l* l# K0 L

: P2 k$ b; @- W9 y4 dRound 37 f+ `" b1 \- z4 I/ u$ c) }5 m
7 vs 8 = 7 < 8
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The answer is 7.8 r" L5 t5 V  A# I0 Y2 C( f
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e.g. #3 假設13為較輕的一粒
  @7 l; v2 j( g3 rRound 1
( I& K5 j% ^: ^; [# g/ L1,2,3,4 vs 5,6,7,8 = equal
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3 X+ b" `, i& l- C+ ]- ~& j- DRound 2
" j1 G! ~6 M6 }4 e  o9,10 vs 11,12 = equal
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/ w5 @& V  ~9 b6 U1 N, A2 P3 A; q, bNo Round 3, d6 k+ }$ K8 ^" e' n! u9 G9 X8 v

9 b/ M1 A' X- z! T% V5 C. P& H. f3 v1 `The answer is 13.
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唔知我答得正唔正確呢?!
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1 \( v. A/ D, @/ U[ 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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& l+ ~% i3 D. S3 ^5 O6 r* x: v1-6 vs 7-125 h8 o# d: T3 U% S5 _
if 1-6 = 7-12     13 is fake7 @- x8 z" ~# z2 I8 \
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if not ! N9 i" p2 h" K

/ N3 S) q9 ^% ]9 b8 |Weight the 2 time 2 [( i6 e, ?' \

) M5 d5 n! m# x; {Suppose 1-6> 7-12# X* e% J. u. X
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1-3 vs 4-6
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$ l  N, u' H5 q! v5 r0 sThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step" s# D4 w/ w& Y
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4 vs 5
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if 4=5 6 is the fake one 6 O) k0 \" ^, {# m+ z7 ]
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if 4>5  4 is the fake one
# i2 g9 z8 Z7 c, U: Y) Q. M1 oand so on......................

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問題第二步- n5 e9 d* Y* h1 e+ t
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Weight 1:  1-6> 7-122 D4 `. t) Z! l5 w% |7 r1 }! J8 i

; Y# |3 j) e2 i1 ?3 eWeight 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???
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# W- G; `  @' X0 ~' v2 L) R) G========================================
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2 a4 `) E& N/ e$ w* V問題第三步
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7 `, Q; W% S4 f0 |6 PWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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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