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)。
: C, u/ C5 ?! x$ B6 _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？』0 v1 w4 F" R& z6 o3 k+ o, z

. F7 f* P  t8 x# U; Y% O  i注意: - G: I: `8 o! k; ^% ]! c* u- }

' e8 ^/ e7 `; z5 j2 r; F4 x1. 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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8 f$ h3 J3 c6 c0 u. b3 Z2 }: Z2. 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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3 o2 L+ u0 K7 u' ^[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:2 b2 n* W6 m. L
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,
7 ?8 }5 D8 z( `. e0 R0 [7 i  a等我搵下仲在吾在0 j  k$ r! ~7 F" ?( ?2 ]

' x, c# U7 w. P% J$ R9 \4 s當日用左37分鐘答１２粒波子，差７分鐘才合格。
. {& E0 Q/ ~2 E1 ^3 u7 N13.........
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! \$ Y3 z" f7 g$ b+ ^[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:1 u2 J! I- w; y  J, n/ N
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我以前畫左個chart去答,! u- m/ C5 U' \
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:
& i, c+ Z1 h; a1 x) L唔識隱藏...已經諗到..

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- B; f: u9 _" L: L% n( n8 Y% m; gsor !!!....e加改左
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* c' _# U$ w! t: h3 x2. 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6 A2 |6 U' _& w/ M6 r

; ^- ?) ?; w: h- {/ T[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
( w' k( Z- f, y5 O( M* w1 V+ v. k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.3 a. F4 o; }1 r: _- M' Z# b$ P

7 [+ U% q7 w  \4 [4 P, V( m- JThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  @, U/ x+ C* N+ r
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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

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1-6 vs 7-12$ F; k, t# U* F, I
if 1-6 = 7-12     13 is fake
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if not # o7 ^* }9 [/ O% ~" Y' F) }0 Y4 {

) J; `# @* V* s/ J' ~+ IWeight 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 Third
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: }. O- f+ ?& z: |Suppose 4-6 > 1-35 o3 N' ^6 I$ K; n! X) r
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Just like the first Step
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+ w& h# e% e7 q/ J4 vs 5 ; \+ H: p. m$ J6 P( h1 @" H3 {) f

: o0 o0 T1 `) S$ w" lif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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- k# f& O6 l* S4 R$ _, j, ^and so on......................

hello1997

分3組4隻波子秤$ h) V* _% [! o

* N8 f3 \* @/ M, g/ o( ]; ?4 ]& V; l' SGroup A: 1,2,3,4
. r" T* d6 y/ c. LGroup B: 5,6,7,8
' i% K# x/ i: \8 r- d. _' OGroup C: 9,10,11,12
; y4 |& P3 f$ S( b: {% p& DGroup D: 13
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Round 1
1 @" u& n0 p: I: M: UGroup A vs Group B5 C8 m' a$ n' J
如A and B一樣, 即較輕一粒在Group C or D
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Round 2* Q$ m0 O' D5 n+ w
再在Group C拆成:' R, J6 I) A8 g: b* A( j+ o; l
Group Ca: 9,10  K6 X5 l2 G+ K
Group Cb: 11,12
4 g$ }1 f0 K- Z- u2 W. \6 h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,
$ M9 h5 s# L0 w- P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! c7 G. s+ Z. F, ~4 ~7 I  R
Round 1( k, b& U. N/ T1 m  E
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
$ i& H- w- G. f) U7 }8 Z9,10 vs 11,12 = 9,10 < 11,12- i& z* a+ c" K  @' f- X6 M

! ]( ~5 n6 `$ d0 ~Round 3! i6 |& {4 c' O) R  |9 c5 H
9 vs 10 = 9 > 109 S9 e' g  |2 }1 x" w% Z
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The answer is 10.8 O% W" t5 U7 o

% b+ _' j% W+ W, y) Q0 A- ce.g. #2 假設7為較輕的一粒
" j% P. n/ ?5 JRound 1  B( Y0 T% ~( ~
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& C* w' G5 }* k( a) I- {# B
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Round 2. k$ l2 ^& |4 K% F6 ^
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
8 z( |  t; c$ i7 h. W. j4 i: P7 vs 8 = 7 < 8
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% h) M7 c* b& G9 z' q7 x2 a6 qThe answer is 7.4 s" L2 h* f4 @% b

; f, q% X4 X. t' B$ ce.g. #3 假設13為較輕的一粒3 V" p5 m+ c- U: Q# f: X$ c+ j
Round 1
; s( C" E+ K* a: H6 D' K$ s7 f% a1,2,3,4 vs 5,6,7,8 = equal, T8 j2 @- U+ r$ B; l6 _$ V: P
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Round 2
! k! X- K. O& w; b* [/ v$ f, a# Q9,10 vs 11,12 = equal
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No Round 32 M4 F+ H% _- Y; q9 O
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The answer is 13.
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- m2 \3 O3 z  r  [# f% l唔知我答得正唔正確呢?! % r: u# X5 W3 M2 w( r* H7 Y6 Y
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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:
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1-6 vs 7-12
$ `; [) i& z; z# s7 J5 sif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time : {$ G& D( g- c8 N& V

: a4 R: u; K: T: l( m7 M) _Suppose 1-6> 7-12
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1-3 vs 4-6 + B5 X1 I1 e# k  I8 t/ `! I, X

, s  t9 y8 G- x) |! c  T0 D) w2 vThen Weight the Third
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" P# M, I$ f2 \! D( rSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5   l% E+ \' T) ?- z
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if 4=5 6 is the fake one
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$ Q( s0 A3 _# [; rif 4>5  4 is the fake one . \0 L+ O- `& ~+ V5 }
and so on......................

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. z: I" g3 v7 r. L7 [% R問題第二步3 t- h& F* p7 C8 p4 x
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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
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你第三步点去搵 7-12 边一粒???( t$ i$ v9 U4 D
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問題第三步
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% ~; a  p' |# r, q% hWeight 1:  1-6> 7-12
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: h% L2 x* E( B! c: F3 i% wWeight 2:  4-6 > 1-3
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. \, L3 ?! H0 _* y4 V6 }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