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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  v- O5 R2 D2 ~8 k  @# J# J『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)。
! u3 {, v- L, Q4 E' I8 o5 j0 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: ( s( M; |( }! L8 l5 d1 u
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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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' C! f5 y  j$ Y; }' }& _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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) n7 }0 p8 v1 J[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:8 N5 y) l; Z& @
相信e條題目都有吾少人玩...

8 w0 ]3 s+ q' u& H- B7 [3 u% S我以前畫左個chart去答,% B/ D6 }( z& G( F8 v; u
等我搵下仲在吾在! B# k* X  j' k/ o" U* w3 P

) f7 n/ F9 m5 e# _當日用左37分鐘答１２粒波子，差７分鐘才合格。
4 `9 Y+ O) R. [0 P13.........
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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:( _! c7 \7 ^& {; k3 D' q, \7 \2 p4 _4 A

: h7 d/ o8 l1 {我以前畫左個chart去答,9 D# n' a8 `' Y4 I" Z4 g
等我搵下...

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; [2 ?1 g& ~; \' w' u. m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 w& x* ]$ y
唔識隱藏...已經諗到..

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sor !!!....e加改左7 E8 S  D. m& E2 u8 A2 y
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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
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  q/ Y6 G! z# C3 p[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
& N+ z6 K" h" m+ N4 P1 e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.* U: \5 F/ ]2 ~! s
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:4 I, w1 M& h  S9 e5 f7 q# }

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! y% x$ c0 v" O. Y" yPlayPlay, Let me know later who has the right answer and I will add points accordingly.& p1 a/ l- \: I( T% O
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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.
6 v! z% L* X& J0 E1-6 vs 7-12
, m" {& b1 ^& A5 S/ L# gif 1-6 = 7-12     13 is fake' y- ~1 Q: {  k% A8 V

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" S- c! T2 e1 k! ^# w+ F/ b1 RWeight the 2 time 8 P& ?4 J$ J9 e
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Suppose 1-6> 7-12
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1-3 vs 4-6 % ?1 U) m% B2 ?( ?( o0 ~5 y1 e- x

5 q" B* v9 H& ^+ ZThen Weight the Third* E! U+ C/ |- j1 r
3.
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  y  z: M: t  V+ ]2 S8 GSuppose 4-6 > 1-3" @8 c' U5 K5 O% [. h) V5 f
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Just like the first Step
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4 vs 5 7 W3 U( t4 Q; p% e: F. d

% G: q& e0 Q1 c+ mif 4=5 6 is the fake one   L. P) r! B3 ?/ H1 `3 J  h

9 D( L2 q: c. C' l5 y2 d% Aif 4>5  4 is the fake one $ e% Z0 p2 o: x
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and so on......................

hello1997

分3組4隻波子秤( x1 V7 {9 F" r" D) A% H8 Y
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Group A: 1,2,3,42 ~) w4 H% b) C% O
Group B: 5,6,7,8% c! y5 M: i3 e. {  y
Group C: 9,10,11,124 B3 k! I# o1 L3 `4 k: f
Group D: 13# c  g% q: u1 m, G# ]6 [

8 h& |5 K1 F4 k, X; @: ?Round 17 w& D6 `; C9 B  O! u4 B
Group A vs Group B6 a9 [  u. I4 @: V6 {9 l
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
$ x7 G2 `3 ~8 U再在Group C拆成:7 ~" m* F; @8 g, [* s2 A
Group Ca: 9,10
1 {2 B1 K5 X* D7 {; ZGroup Cb: 11,12
5 l+ x7 w, Y, c- N, x* _# l然後再秤, 如一樣, 即13為較輕一粒.7 D' Y' {) M. m

# F" ]0 d- F9 n1 n; i如不同, 即較輕一組有一粒較輕波子在其中,
" {* s" T: L9 Q要再秤, Round 3, 之後便知答案.
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2 K0 y8 W4 b: ?+ Pe.g. #1 假設10為較輕的一粒
+ d5 u, Y+ I" t, S( Y0 WRound 1; ~! p" P) T: p0 |
1,2,3,4 vs 5,6,7,8 = equal% E( w7 e9 [6 z; T8 J. I9 V6 o

- J) w" O0 }5 n, }Round 2( ]2 E6 [0 k4 S( K. c
9,10 vs 11,12 = 9,10 < 11,12. D$ y& s+ L/ }8 m5 T
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Round 36 M: o5 q" d- k% V. _! Z0 x6 e
9 vs 10 = 9 > 10
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The answer is 10.
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$ r! S2 M/ Q- K2 z* w. R/ Be.g. #2 假設7為較輕的一粒
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" P2 Z) b) O+ |6 b! ?3 g: `* A1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
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3 q6 ^; N/ G. X1 s( X' a, F. `" ^Round 3
* Y1 V4 t2 Y8 o7 vs 8 = 7 < 8
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The answer is 7.
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- x" p+ V8 i  Oe.g. #3 假設13為較輕的一粒  A: ?0 i' ~/ X. d! m4 E
Round 14 ?) M( j, @+ e
1,2,3,4 vs 5,6,7,8 = equal5 {; X1 k: f" e2 k2 S# `

* q. b2 T; A. o5 mRound 2
$ W7 M- A" N5 Z; H9,10 vs 11,12 = equal: @- p) u5 M) U/ P, A3 F# z

# Q/ U" Z+ x8 U' F/ f7 oNo Round 39 e% f* X9 c. M3 h* W( P8 x
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The answer is 13.
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唔知我答得正唔正確呢?!
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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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" v& x2 f( y, J* k; H( a1-6 vs 7-123 N2 g0 a% [  {$ J8 i* U
if 1-6 = 7-12     13 is fake/ O$ ~$ c2 R1 B  {. P  O

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Weight the 2 time
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Suppose 1-6> 7-12
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1 _  R; V* k* `7 B2 b: G4 F1-3 vs 4-6 0 z+ G0 r0 U0 T  |% h3 ~
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Then Weight the Third
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8 w2 |; ]) ~8 `& hSuppose 4-6 > 1-3
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* H  a( \+ ]0 _' P( J* k! |3 uJust like the first Step3 q- t4 _( ]% y8 U* o: d" ], e% A

/ G0 U4 W# a5 g3 S/ N4 vs 5 - H! J2 m( q, d+ L+ p
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 2 ^. g" o: T/ V% {- J. S8 I
and so on......................

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問題第二步
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; g5 @! L3 I( B) y4 hWeight 1:  1-6> 7-12! O% X2 }3 }1 p* r! ]: Q: E

- |; {; w& W2 Z# }( J* J: X/ Z, tWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6; F+ g7 Z% x. i% i' z

7 J( @2 E$ J  l/ S你第三步点去搵 7-12 边一粒???' m# o* b1 p4 Z. y0 x& m
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問題第三步
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Weight 1:  1-6> 7-12
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/ S3 O# R6 b3 U! S4 U( WWeight 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