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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' I( N* b& g/ f* V『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)。( c3 ^& h7 l! c; P0 [2 F
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:
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' u4 r5 j9 Z3 e2 u( G( D1. 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. Y8 k1 `" G- O- d2 W" C

/ r/ @) s; ]8 q* r2. 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6 l- c" V. |7 G/ T
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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:, @; q3 l& d7 M$ j0 K4 y* E
相信e條題目都有吾少人玩...

; [8 K. f- p5 z0 X) }' j; S我以前畫左個chart去答,* V; a2 j5 j! p: ]
等我搵下仲在吾在+ F* k! _# q1 H* ?) H+ R
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當日用左37分鐘答１２粒波子，差７分鐘才合格。# O& a; s5 t0 b! w  Y
13.........+ X% Y* G& ?! f# K/ x: l
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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:
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我以前畫左個chart去答,
- m9 T3 V+ }! {, b( t  `等我搵下...

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+ u0 I# c  K. {+ S% y7 h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:6 ?4 Y2 ?4 P) @! a0 u6 w+ b" @% U
唔識隱藏...已經諗到..

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" K. N+ z3 N' E7 E, Msor !!!....e加改左8 r9 K9 C$ H8 g5 R" C7 Q

+ Z+ k" ~6 [( T2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
2 f9 S. J5 D4 X; Y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.
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# [) h1 Y) s( J% I( o: N- I- h# GThanks

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." M4 T! P4 N' C: b
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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
3 \. w9 O, a/ k" V( k* x/ |; `$ }if 1-6 = 7-12     13 is fake" ^# P. u4 P. i

7 r/ ~* R2 M% S9 i5 ?if not
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Weight the 2 time
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Suppose 1-6> 7-12$ t8 Y/ ?) D2 {8 c  j4 P3 O) e# r
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1-3 vs 4-6
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Then Weight the Third0 v3 ]. {4 b& h8 v3 t
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 ' j% J2 K- s2 ~2 ~  d0 _$ _
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if 4=5 6 is the fake one * @0 n2 M0 E7 ^. A# w7 ^( k5 b
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if 4>5  4 is the fake one 7 Z( v$ @0 L* n" [& v; P/ r& `
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and so on......................

hello1997

分3組4隻波子秤; P0 K  _0 T5 Z. C& O: ~) S& X
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Group A: 1,2,3,48 l! Y$ D; u8 u, ?+ g. H
Group B: 5,6,7,8; |; L4 n: K; ~" ^1 G
Group C: 9,10,11,12
, p. V1 C3 I) ?% PGroup D: 13/ O: h5 {9 ^" f7 `# n1 \4 G

5 x1 u) X. I) j% }( k# S4 V7 fRound 1/ t+ _1 F' o% H: f. j
Group A vs Group B  ?. H  J' y: @3 D
如A and B一樣, 即較輕一粒在Group C or D
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. @: m  e, E, g$ gRound 2
/ @9 x7 h1 X9 f/ ~9 [再在Group C拆成:
" S% W) I8 ^6 A/ d4 A8 Z8 ]Group Ca: 9,10) O  @4 [8 b- t( |, W8 {/ h! s, ^
Group Cb: 11,124 F* M: d4 M5 s! @* V- k2 R* Q& ?
然後再秤, 如一樣, 即13為較輕一粒.
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; S5 d$ i& l0 Y8 Z$ N0 O如不同, 即較輕一組有一粒較輕波子在其中, 1 l7 E3 U. r$ Q# y' ?
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
' w5 H3 V% F. vRound 12 S$ E3 `. Z) ^+ [4 T$ |9 b" x
1,2,3,4 vs 5,6,7,8 = equal
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$ ]# {1 T* ~- ]  M7 X, BRound 2, {  P; ]* G$ t! o
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
& u; X1 m, h* R9 vs 10 = 9 > 10
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3 ]+ u, i5 D; W; ZThe answer is 10./ }& ^7 j; o) [, J. j9 a1 G  W
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e.g. #2 假設7為較輕的一粒
1 t- E( }$ n* H$ ]' z; `2 n8 K1 qRound 1: l& c$ L/ `1 ]
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: C6 |- U0 {& B! T

1 U) T& d( o: J" [9 E# t* KRound 2+ e' |/ l6 S- [/ Q) q) h0 z5 j
5,6 vs 7,8 = 5,6 > 7,8
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, G8 {' {% d  R. \8 y/ xRound 3
2 g) U0 U# i2 p  f# _7 vs 8 = 7 < 8/ ?9 y( z, r2 B& k' a# }

$ \! d9 u7 l- |$ S8 ^/ vThe answer is 7.
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; F0 x) r6 `1 j( x! le.g. #3 假設13為較輕的一粒8 I  J7 A3 o2 B% ]3 e
Round 1' H' j/ p8 T! H* e  `* U  U2 l
1,2,3,4 vs 5,6,7,8 = equal4 U1 ^6 c& ?2 ~8 h( m' ^. z8 @
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Round 2" a" R0 i+ h1 o' v( F$ i: u0 U
9,10 vs 11,12 = equal7 U- K. b3 g. V1 @% l: k

  h- d9 h; {8 y+ V& O% \* K& l' C5 CNo Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! ! z# O. F7 Q* G# \
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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:6 |( @$ b8 f5 k$ F- I( p, @. |
1.
$ e9 V( S3 i1 l7 d# f- l3 }1-6 vs 7-12
6 d1 P9 [, f1 Hif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 2 d# B3 i5 E! X! o( m2 Q

& n8 \" b0 Y4 F* `Suppose 1-6> 7-12# Z0 G$ B- t- z% U

. C8 C8 ?+ ?2 ?* {: v1-3 vs 4-6
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Then Weight the Third
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1 B9 N' A* m' i' p) USuppose 4-6 > 1-3
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Just like the first Step4 ?( r1 R. }6 z1 F
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4 vs 5 * W2 m3 a; n7 ?: G+ |5 W
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if 4=5 6 is the fake one $ ~6 U/ D* d0 n+ q: N4 O

) H; P  ^, m; D: Oif 4>5  4 is the fake one
* A1 P" a4 J1 Y+ g4 _7 b3 v' qand so on......................

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問題第二步. X" X7 q8 M6 z! c5 `5 d

" }" C6 y$ W4 y( N5 y& h  QWeight 1:  1-6> 7-12
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; V2 P# l$ W! R% z6 U3 HWeight 2:  1-3 vs 4-6 , if 1-3 = 4-69 g0 Q' i' K1 I
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你第三步点去搵 7-12 边一粒???' t8 t- @5 Q1 y. K  {/ F$ Y

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/ Q. i$ ?# S& w9 u& a5 @問題第三步
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Weight 1:  1-6> 7-12& h0 \5 Z' U4 n& D0 V" h' D

+ K0 H. N* t# u- a) KWeight 2:  4-6 > 1-3 $ G. d1 F$ |, C9 x- i' K8 @

) F% y) j% K- p- V5 `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