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)。- x& O; W) r4 p
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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. C7 e! E( t3 h! l! Q注意: % I" x% M' Y' ^) j5 G; d. p- A

1 `1 L0 ~: Z, j& X5 w1. 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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9 i$ o" v  s  F0 z0 B2 v$ u2. 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% T" ~) r+ i7 w+ W. w% G5 O

' t! V' j. w  b5 b$ @[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:1 R9 d1 O. F$ V3 A/ {
相信e條題目都有吾少人玩...

. h5 l' \( ^* K5 R* ^我以前畫左個chart去答,
) F. G  r+ T  g- s等我搵下仲在吾在
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5 Z( c. O% {- b& C+ W當日用左37分鐘答１２粒波子，差７分鐘才合格。; c- }7 S. N5 H3 K7 W1 U
13.........
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& _2 z9 @) H  r+ P5 v/ X7 L5 h/ e[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:* p0 U; `7 i) f& o

0 ~# w8 @! S% F+ W# \我以前畫左個chart去答,7 H( }6 T3 x; w
等我搵下...

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6 O1 p: t6 s$ 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:' L  C' a* L4 v1 R1 s  o2 y
唔識隱藏...已經諗到..

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sor !!!....e加改左
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. _; A# v+ [( q* R( w2. 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  Q8 F/ E; O  I& u( A
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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:/ j8 ?/ T2 S$ j
相信e條題目都有吾少人玩...

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. B2 p1 F( k5 v+ @) A$ ~5 u; vPlayPlay, Let me know later who has the right answer and I will add points accordingly.( N' @7 K3 H& j2 q4 `. l3 z
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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$ ]2 ?2 O( i4 I& ^% i; Z8 ?( RPlayPlay, 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.
* t% D9 n9 E6 _; S/ |4 B1-6 vs 7-12
! z" ]# _) Z; J  P1 hif 1-6 = 7-12     13 is fake. T4 t4 L' @0 M
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Weight the 2 time
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1 M9 t0 s7 W/ V3 v- ]" USuppose 1-6> 7-12
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8 O: X+ v8 P% {$ A6 M9 z7 K1-3 vs 4-6
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. G: S: y% W3 H- ~. FThen Weight the Third
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Suppose 4-6 > 1-34 r* ~! X& z4 H" B

, W9 h6 h4 Y" B6 e' nJust like the first Step+ X1 P9 Z5 S  Y9 Q5 S
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4 vs 5
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if 4=5 6 is the fake one 4 f; Y0 `9 e# u# s' g, b$ c/ A

0 l; B0 y. Q. |, w# r$ S8 W% P9 Z, ?; X' xif 4>5  4 is the fake one ) ?; c# }  u* y/ R6 e9 l5 F* M

; R9 {# ^3 R$ f. g+ ?6 q* ?and so on......................

hello1997

分3組4隻波子秤
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( _! q# P" G, m% R9 Y# X$ k/ |( }Group A: 1,2,3,4
3 u3 T! l, y# c2 OGroup B: 5,6,7,8: v9 C1 Y9 c( h5 h9 u
Group C: 9,10,11,129 o" q) @, c/ _2 Z2 [" b' w7 v1 [
Group D: 13! v2 A: a) J4 }% {0 b3 D! x

, o' R. F# N3 M; VRound 10 [) W& `0 i9 w" [# ]  j
Group A vs Group B# j- {" H7 V& A0 l- V
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
* w' u$ P5 \- g% Q/ P8 T; P' C再在Group C拆成:* j; L2 [- S- e
Group Ca: 9,10
( s& f" f8 u/ ]( f9 z, E0 e+ VGroup Cb: 11,12
2 k6 M9 y: {1 _* [: i然後再秤, 如一樣, 即13為較輕一粒.( v4 R1 D, K2 ?+ e" b& m
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如不同, 即較輕一組有一粒較輕波子在其中, : m. x9 r% X# u) C- t- G4 P2 \4 a0 u& {
要再秤, Round 3, 之後便知答案.  v0 i) |* ^3 j* ~2 T1 ?

3 G  k7 z) O0 W/ De.g. #1 假設10為較輕的一粒' i% d7 J% L+ K# l8 |8 z4 V2 J+ I7 |1 t
Round 1" h2 u5 u- x2 X6 ^' c
1,2,3,4 vs 5,6,7,8 = equal. H: J1 O, l2 x* q+ l

& p1 H! d2 t* V  W2 ~9 E  eRound 2
% Q5 b3 {- x+ G* K- t9,10 vs 11,12 = 9,10 < 11,12
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Round 3
# L" I# N& g3 O, k7 ]9 vs 10 = 9 > 10
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$ I& P& t1 B- H! @( `( `The answer is 10.3 \8 D5 [; \2 y- n
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e.g. #2 假設7為較輕的一粒
: ^  O0 h2 D) I5 G) d! P# _% }Round 1
! r: `2 {% r5 N/ W$ g1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
" x5 }. g) l7 U7 }3 z' x5,6 vs 7,8 = 5,6 > 7,83 S. x' L4 r. G2 ~
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Round 3
4 S/ }  K( Z* @7 vs 8 = 7 < 8
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The answer is 7.; w' Q5 J! I7 Z9 v) C

8 w! Y: M/ Y8 l# Ie.g. #3 假設13為較輕的一粒$ V6 j' x+ J! D3 G) M
Round 1/ H. y# n' d2 h' K6 K+ U
1,2,3,4 vs 5,6,7,8 = equal. B. n) g" W- w2 Q

$ V! Q; |0 h' {" M. T, LRound 2/ K& I6 o5 k$ ?3 K* _! R( Q
9,10 vs 11,12 = equal1 Q( @/ H! A% j
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No Round 3
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The answer is 13.9 n# r' i0 w" I- F% a1 f/ a5 u
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唔知我答得正唔正確呢?!
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9 u0 a4 p8 D( A* J[ 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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1-6 vs 7-12
! h& {6 x$ D- y4 u( qif 1-6 = 7-12     13 is fake/ i7 B: ?; w, J

; m; m. f9 p' ~( S0 x! V: X4 L1 Iif not
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Weight the 2 time
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0 J, J5 S: d# B5 `3 aSuppose 1-6> 7-12
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% U# ]" W$ C! {( X1-3 vs 4-6 7 a. x8 x8 o' M( V/ F: ?: I6 U
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Then Weight the Third: d" D# A& N$ `
3.
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Suppose 4-6 > 1-3
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) }' G, E0 n+ A4 MJust like the first Step
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4 vs 5 / x) s+ W; \! @5 U& @! ]* T( o# |

' A. r9 P; A% j) K' m; Fif 4=5 6 is the fake one ) A+ n( Z9 y& o4 [

( z' x) @3 T2 H& [( U6 kif 4>5  4 is the fake one
) k6 ~1 S+ D- k* @2 s3 Z- K" b4 q1 fand so on......................

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問題第二步
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Weight 1:  1-6> 7-127 M& w* U6 ?) o0 k- U( f- X+ V/ R: P
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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???
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4 |* O+ B( |  S1 c1 y/ z  O# b7 t問題第三步. X) z) y6 _4 w6 I+ B

9 i# Q9 p/ I5 I# UWeight 1:  1-6> 7-12: i3 u5 c, D4 }

! P- d( p, W' K& n' HWeight 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