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, y) g9 y" W9 j" Y4 S% h
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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)。/ Z  X3 m1 X5 p, ?: ^6 `" B4 y
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？』, b# G- ]& o9 C/ {9 }
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注意:
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1 P0 ?3 I# m* {, B# C8 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; g' J2 c* }! J: V$ E9 i; F
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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- b% v+ H2 X$ e( m" S7 @/ |
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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 M% l4 O4 v1 O9 I! d) f" X: z3 t$ y
相信e條題目都有吾少人玩...

/ Y  p2 ?3 s& I$ q我以前畫左個chart去答,
. M0 `0 ~" ]* f2 P5 K$ D& M9 b等我搵下仲在吾在' f: C! P, E' i3 J, J
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
! S3 A5 F* C8 Y# g; m13.........' V& p& t& w0 \2 d( P: N
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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:) l) R/ K" m2 ]! j" B
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我以前畫左個chart去答,
/ m  k- D2 y2 {0 c( q/ l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:
3 _% o' F7 x; I9 J4 F3 O. y唔識隱藏...已經諗到..

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9 B- C( q# O6 h) L5 Fsor !!!....e加改左
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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* C1 A; x4 H1 y( h

. U: `+ N( H% ^8 t8 x[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:* Z3 m* Y8 |( }$ N! h0 ?
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.; J# q- v6 M8 ~7 S+ g- z3 r2 J# C2 J
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:, e, V: p1 {+ x: k( r9 R9 a
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.' v" |& T- T9 F+ S* L3 o9 {' n" y& S
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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.
; y' Q$ c) G1 O$ y1-6 vs 7-12
# L$ I2 J7 I+ ^if 1-6 = 7-12     13 is fake+ p! D1 k# h: K: O" r3 @
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if not ) S+ C5 U9 K& e3 k

  I: i' H# A+ E, _4 {3 E3 ]/ dWeight the 2 time
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$ e. J& q: l9 x/ l/ H- PSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third% p) |* H% w) H( z
3.. C. [( q- L) G* k: A! Y

& J- P* f% @- Q5 Y, DSuppose 4-6 > 1-36 g  t- D1 U0 A& ?- D
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Just like the first Step
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$ l4 {7 ?" h0 i0 C# [& M4 vs 5
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2 T4 {3 l) [" E5 l' Hif 4=5 6 is the fake one
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* t/ J8 n5 C; F( g  |3 P  L8 P2 bif 4>5  4 is the fake one 8 F# ~+ w0 ~' e8 ^1 E) Q' @; S  @- G
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4. C) P5 O' j3 S6 V% }$ Z0 v$ c  }
Group B: 5,6,7,8
0 T0 x) f7 t* xGroup C: 9,10,11,12# D: o* e& |' Q1 |3 \) H" L
Group D: 13
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2 Q+ d' W" U$ g, t- V1 m; F" XRound 1; J: u! a4 ^1 E9 Z, j" l' Z
Group A vs Group B
4 ^' O; L# J* O( M, z如A and B一樣, 即較輕一粒在Group C or D# s2 a' t7 [" U' w8 s' I
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Round 2
, R$ d7 n  X0 C+ l8 E% @% m再在Group C拆成:' G$ D3 [5 k% S1 \$ N
Group Ca: 9,10
3 u+ s) m( `7 ]' ~$ @% VGroup Cb: 11,12
9 S2 ~" |0 @) g- c$ \然後再秤, 如一樣, 即13為較輕一粒.
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9 M# e# {. J: e5 ^3 s如不同, 即較輕一組有一粒較輕波子在其中,
2 \* u( h+ s) c9 A% q要再秤, Round 3, 之後便知答案.: J: f) v% x* u+ q  a, Y  H2 d

6 M" V' {5 k/ J- Se.g. #1 假設10為較輕的一粒; K5 ^& W! e& O, z0 J5 d) m. C
Round 1
# ~* x# Z5 b* l4 U3 U1,2,3,4 vs 5,6,7,8 = equal
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Round 2, f. h$ ^# Z: o
9,10 vs 11,12 = 9,10 < 11,12$ O1 C- Q9 W3 n2 j5 p
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Round 3" Q+ l/ A" I' U& m, ~) j" Q
9 vs 10 = 9 > 10
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The answer is 10.9 _$ s0 R6 R, A: }" }5 e4 X
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e.g. #2 假設7為較輕的一粒! F- d# m1 F9 z) m: X9 w$ x
Round 1
3 M0 G& }( u) d0 u: H3 h1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8' u# |. G( D/ g% l  M; N
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Round 2
" Z' r5 Y+ _8 C5,6 vs 7,8 = 5,6 > 7,8* h) m6 u4 O  \2 V" @. G

) K% L, m9 Y. ]Round 3
9 s2 D5 A0 V! j, R+ Z7 vs 8 = 7 < 8! t2 A2 |& ]2 d4 g

& ]8 ?2 {6 Y+ {' t- A8 JThe answer is 7.5 A+ M% `- c) @/ k6 J$ ^( x2 O  l
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e.g. #3 假設13為較輕的一粒" L/ ^" R3 o7 W' c9 g: S* S
Round 1
# [* l3 ?) E1 `1,2,3,4 vs 5,6,7,8 = equal. ^2 I$ H& `) E
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Round 2( Y7 R( X, b2 Q: `0 b
9,10 vs 11,12 = equal
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1 \6 N7 Q. x  R# O5 h3 ]No Round 3+ A# w1 o" _8 Y" `9 b  ^  s1 I5 Q
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The answer is 13.* v1 X+ m. V0 }6 k# K

) I0 a& d" p9 J( e: G唔知我答得正唔正確呢?!
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' U1 d8 G# ]: ^( e5 c[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:8 W. y- t: w" M; [6 s* O* |
1.
" ^4 d1 w! f8 }' q+ k+ B1-6 vs 7-12# O8 s2 Q2 k0 }* b3 L
if 1-6 = 7-12     13 is fake
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if not ( X* F: P" W8 u
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Weight the 2 time " W. _* K3 ?, w2 d7 \0 D

3 t5 u4 R7 o# B2 C7 C- r) d; NSuppose 1-6> 7-12
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7 S6 P& e* r; }) w1 O1-3 vs 4-6 ' h  V/ R, h8 E4 b5 \
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Then Weight the Third& ^8 m$ @8 n( R0 N0 c5 N
3.3 B4 w8 M% ]. a- J

$ B% m0 O% y2 k4 j' H( NSuppose 4-6 > 1-3
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Just like the first Step$ ]$ x/ T  ]- Q: Z/ _' C
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4 vs 5 ( ?  ^  _& R2 G. [  I

; e, K( W+ q( |$ Y0 N1 yif 4=5 6 is the fake one
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if 4>5  4 is the fake one
1 ^- n  V6 w1 p' x* g; p& L" rand so on......................

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問題第二步7 P; h* M& p0 z
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Weight 1:  1-6> 7-12* _9 i8 `% b" V+ ?/ y8 r
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6) S9 r; ?6 N3 c% w- @4 C- P' p; b

6 ^% Z9 m( b. e3 R, ?  d. Z8 X) o你第三步点去搵 7-12 边一粒???
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========================================
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+ {) P) M- x& l! E2 h8 h6 ]問題第三步: {4 Q7 V/ T# {. K& _6 F

" j  W: F! o8 Z9 f4 \Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 9 [& o* \& O3 g

" D" h* w: m. Y$ 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