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; W% W+ Z, g  m! K# z+ b
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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)。! d6 p; r, o2 Z* i5 A) ~3 Z3 g
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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  D( D- z% v! X6 l2 j注意:
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! |  l+ n" f: ]) p6 ~' {8 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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: \" m" s# H' T& }# e# S+ K) N* i2. 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:- `, f0 h; K; a% p( v- t6 j5 [
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,
0 `, |2 k6 E% w: o+ H0 Q2 H: h等我搵下仲在吾在% Z4 X' e7 I2 {$ w5 c9 p9 p

: V  U, q* ~( H當日用左37分鐘答１２粒波子，差７分鐘才合格。
" W9 `4 U8 s% K% }13.........: ^2 Q9 D! ~* X& I) h
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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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( i. B8 [7 K0 U7 n. N9 u2 z% d我以前畫左個chart去答,
% i! d. ~, a( P等我搵下...

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% h- X3 b) n" y6 P% A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:
  J4 j7 v# |  p唔識隱藏...已經諗到..

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; y" U1 P: v: o, Wsor !!!....e加改左8 M8 \7 w: ~# R4 V5 ]& e; H
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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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$ x3 R* T6 J! `. I" l[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:/ E  s8 c( v6 k0 a% \7 g9 [
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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) {1 U; _/ s: j$ B, wThanks

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.; [4 t; T+ @# u5 A# {# |) h

) ]- O. o9 c4 E* uThanks

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( l6 `5 W' n" _7 V不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
! |& k" ~+ f' v/ o( F3 }1-6 vs 7-12
5 L+ k+ ^" i( }4 Zif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time : E6 d% r$ C5 \$ D+ B' X
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Suppose 1-6> 7-12
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" }6 e& D# [0 U5 E1-3 vs 4-6
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Then Weight the Third5 h% U$ ?! q& B! w. H( t
3.
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% `+ ~7 r) A+ ]- V! ^. D/ MSuppose 4-6 > 1-37 F6 W/ E6 R; c+ Q& o  v
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Just like the first Step3 x8 n! a/ q9 R' s5 E# B8 u9 O

7 q* s, A7 z: m4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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4 |* i/ a$ x! C+ H& e+ Z! Z: {# rand so on......................

hello1997

分3組4隻波子秤
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$ Z8 l3 s$ ^) }& U7 Q7 I4 iGroup A: 1,2,3,45 D7 I7 l' \5 D' K- {
Group B: 5,6,7,80 [  J4 Q! o( _
Group C: 9,10,11,12
& C  e8 }6 M# DGroup D: 13! L2 k- W5 n7 o

  _! v! n: [1 x+ p+ x; ^Round 1% A. J1 Q+ _% L# u9 f" X9 Y
Group A vs Group B1 h' z7 x" J, t" Z
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
$ A) N) ^1 s& I再在Group C拆成:3 o( c& M! B  W! `, m
Group Ca: 9,10" @, w% S- R& b+ B8 Q6 E, ?, j+ {: X
Group Cb: 11,12+ y. c3 f* [/ x% A+ \+ ~9 N, x  |
然後再秤, 如一樣, 即13為較輕一粒.
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4 R. j! b( S' h0 R如不同, 即較輕一組有一粒較輕波子在其中, * v" e2 Z- J6 k& [! ^
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; p  W! Y- t# {; q
Round 1& v' e9 t$ p* ?) @2 M/ K
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
; r* _6 |$ s3 c! ?9,10 vs 11,12 = 9,10 < 11,12- ~, e6 K: D3 Y+ a( W$ T
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Round 3
) `$ I( x8 [) r. C" Y4 L; i9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒# i4 P+ F. S4 d# ^
Round 1
7 Y) l% `& N2 q4 \7 A; j7 t+ s& |1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2+ j% T: {$ D7 j* m* X8 v
5,6 vs 7,8 = 5,6 > 7,8
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+ [, C% ?" x' q" ], a( ]# pRound 3
2 p* [( z- B& |* e3 L7 vs 8 = 7 < 87 b0 K3 k2 M) N6 `* k  m1 n4 \* v
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The answer is 7.
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( K" L+ V6 O6 ?# [4 De.g. #3 假設13為較輕的一粒
1 r" E2 y5 t# g: W  cRound 1
1 m+ L# z( d+ @% }) K4 z1,2,3,4 vs 5,6,7,8 = equal9 D# {" E1 ~$ m2 }% o4 x7 Z6 E( V
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Round 2
- F# d3 c) p) N* \5 c+ k9,10 vs 11,12 = equal
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No Round 34 [! \( n1 D1 O2 {6 B7 L" ~3 t

" g* w# y! a* G. j) H7 ~& TThe 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:# o3 a0 p* g# N1 L1 h. n( l
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1-6 vs 7-12( H1 Y1 p, F6 @7 ?- f
if 1-6 = 7-12     13 is fake) M, X' E& c4 E
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if not 3 P# }* J: |# N3 Y% f- o
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Weight the 2 time
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( j( h, b# c2 ~! l1 QSuppose 1-6> 7-12% M9 w* w7 a* G/ p. S; @

  z  d7 Q3 a+ F: v! f4 l1-3 vs 4-6 & Z' Y) P8 ?/ A

# l" X, v. ]% ^8 wThen Weight the Third. @4 F" B) f2 J/ L1 Z4 }
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Suppose 4-6 > 1-3
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: j, s6 I1 m& n6 HJust like the first Step- @& u/ r* S* `9 [

8 z; L$ B1 R; m4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
; e' N1 ~) _8 r5 o& Uand so on......................

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問題第二步' {$ ~) U! D1 G# i

. g9 H7 H: v; V0 l5 y2 oWeight 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???$ q- }$ W7 A8 ]

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問題第三步
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Weight 1:  1-6> 7-12
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% y  D7 ^4 W! N, hWeight 2:  4-6 > 1-3
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9 \2 T8 o/ Q# a' f7 l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