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* N) d; v/ {( t! _, I『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)。
" R# `& S( a: @9 V( M' s& `; i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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, ]% X. J% W7 C6 V1 _2 l2 ~6 D4 @注意:
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, {7 h$ ?) Q9 L, w+ J1. 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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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
! }# [7 _$ F2 k% x) r# h, O相信e條題目都有吾少人玩...

( Z4 R5 H3 W* d9 l% }9 D我以前畫左個chart去答,5 u% y. y7 _8 g5 k3 j
等我搵下仲在吾在
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/ x+ i% D0 Z; T當日用左37分鐘答１２粒波子，差７分鐘才合格。4 @1 V& V* h7 V/ L4 p+ [  a
13.........8 l9 b# a; l/ D9 x/ e2 F- F
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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,
$ X% w$ V8 I' {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:9 L& T( D! ]. N3 \8 }" E
唔識隱藏...已經諗到..

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sor !!!....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
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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:4 {% ?' m% c$ {" O4 g$ M6 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.
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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.% ?5 y/ S( U' h$ _& I6 ?
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Thanks

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" u+ A8 @1 q, D6 c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* |% ~8 Q- m) H
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 9 o# }7 D2 T1 q) u7 a4 Q

" f1 t' Y5 `# L  X- ASuppose 1-6> 7-12
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1-3 vs 4-6 $ ~) ^9 @5 w1 L6 J8 Y5 \! D  B
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Then Weight the Third2 `6 n2 m# u3 l) b3 W; o  _* H' M2 ^
3.
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Suppose 4-6 > 1-3, @& B/ G% p! _( `- W8 K* s: q. H
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Just like the first Step( a- q$ k5 f8 f. m  F/ E; \% x2 A$ B
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4 vs 5
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, V: ~  F7 x  nif 4=5 6 is the fake one ) v5 Z, P- J- {( ?, k! \- c

9 g& J2 V+ w. O; \  |if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤7 W8 W/ s7 y% Z9 C- K' A! G
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Group A: 1,2,3,4
1 n* A+ d! M+ {# r+ P2 j8 ?Group B: 5,6,7,80 f/ M: L5 X5 _' f+ d5 ~( D* T& a
Group C: 9,10,11,12
4 q; n$ X3 {. P! yGroup D: 13/ a- ]% K$ E3 y, ]; Z1 L8 e0 a

8 q& c* T( }" ]( D1 ]3 I+ N+ ARound 10 l  c2 I) H& j2 F5 ~3 R+ P2 e
Group A vs Group B. r$ l4 @% |" b8 I- b1 q* w3 V8 W
如A and B一樣, 即較輕一粒在Group C or D6 l& L( _6 s; u+ k
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Round 2
1 k9 p4 \% c- `! U% `3 F. t再在Group C拆成:
& R6 ?" ]; D' t2 S9 @Group Ca: 9,10- X3 W9 @- q. l
Group Cb: 11,12
/ y: i+ [) H& t% A然後再秤, 如一樣, 即13為較輕一粒.
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, U/ j3 X0 M9 e2 r: d# s! q如不同, 即較輕一組有一粒較輕波子在其中,
5 Q3 l0 J: ?1 {9 ]" k" e0 N* Y; B要再秤, Round 3, 之後便知答案./ h" L/ V* r+ d# o
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e.g. #1 假設10為較輕的一粒
* v5 x. W! A+ f0 Y4 [1 M8 X: ~Round 16 |! C0 ?5 Q. K; \- j0 A
1,2,3,4 vs 5,6,7,8 = equal
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  o* n5 ^( _# g7 A( VRound 2
* a8 {: x# |+ y1 _* c9,10 vs 11,12 = 9,10 < 11,12
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Round 3! q1 V; S1 a. Z' {% R( e( J
9 vs 10 = 9 > 10
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$ D( a: c& I) m6 m: {The answer is 10.
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: s/ K' W" @5 [+ }9 e$ he.g. #2 假設7為較輕的一粒' }3 a. R. w" z
Round 1
4 q2 D, f& B  ]; e) P1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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+ p5 T2 }+ o9 \+ K& n5,6 vs 7,8 = 5,6 > 7,8
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5 u  r. G. C) Q( t7 W" W6 JRound 3
4 \2 T% J; ^1 Y0 e0 @7 vs 8 = 7 < 84 U- I' [, G# `5 B) X2 g
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The answer is 7.
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- Z) F+ M9 H9 K. y* S( ae.g. #3 假設13為較輕的一粒
" b2 ]1 J+ j2 W- Q- H+ F. VRound 1: a- W+ [" v+ X9 O$ }4 M
1,2,3,4 vs 5,6,7,8 = equal& O$ A/ p6 ?' O' H
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Round 26 r9 N3 |: W7 s! b3 y: c
9,10 vs 11,12 = equal
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No Round 38 U, [- i! K1 f/ h" V
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The answer is 13.5 c4 s9 D7 Z) N3 u/ c5 f

6 U/ h  u4 h  N* K5 H  A* {$ r唔知我答得正唔正確呢?!
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( ~' c7 X' ~. b3 a[ 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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5 X/ F) O, H* p7 H, Y5 A) ]1-6 vs 7-129 T) R7 T3 H: ~7 M$ Z
if 1-6 = 7-12     13 is fake
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7 W* K* _6 ?3 f' }& uif not
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1 c4 |5 y. r$ H9 i, e# ]5 r- gWeight the 2 time   w3 G6 X4 ~4 K* j
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Suppose 1-6> 7-12# E- D; k9 F9 h- L! [5 q4 p5 g
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1-3 vs 4-6 + a1 B: L- D2 [3 \7 z4 h0 X
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step' r7 s! G' m' {
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4 vs 5 " S% l* _- I* j8 Q8 k8 H: w% A
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if 4=5 6 is the fake one
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0 E/ o( B- o& R8 k9 g; N! I' p* p8 Sif 4>5  4 is the fake one
0 p6 B% I- Q8 T9 {# m4 V- t- vand so on......................

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問題第二步
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Weight 1:  1-6> 7-12: L7 j, b9 P  s- O
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6* H- z& J+ {- ^$ x+ B! |3 m
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你第三步点去搵 7-12 边一粒???
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; K% J1 h. T4 `$ B8 ]* ^問題第三步
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Weight 1:  1-6> 7-12
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Weight 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