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( I8 B$ T5 a; B7 k; L
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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)。. P! C: K- W. ]2 k- O
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？』" n" M" V4 Y6 w) @$ P" {

4 j0 k5 U# x4 c注意:
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" T" z) {2 |, m& ^* w! ?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  M! t5 H4 e, V: R4 ^, U* V
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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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  @* `8 L( I0 Z1 r" K; @" B/ U[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:. j' B, E; |2 C% \/ h# t3 x
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,
8 k+ N# Y& C* J4 b等我搵下仲在吾在
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" x) b+ Y4 `/ [$ y5 A5 [. i* D當日用左37分鐘答１２粒波子，差７分鐘才合格。
) F- n% W" q1 i  u2 T0 y: l13.........
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  @/ a1 u% U4 B2 w( N4 y[ 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,# S( e7 R1 _8 i1 |! @
等我搵下...

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2 |2 J1 Q" n/ S  B+ V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:
; z. y' {% l% J) [) B0 Y) K3 E0 I, _唔識隱藏...已經諗到..

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sor !!!....e加改左8 i8 H+ j5 `. e

6 a& u) M: E* r& X$ g2 m2. 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 |. m! F& n3 W. w* c6 K( N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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- t  }" b4 p$ c6 X' DThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:0 R5 G( W: s/ F
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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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5 O5 r8 V- u0 n$ O不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1." N# d  F) U6 d% _2 `  |
1-6 vs 7-12/ \! F; y$ a2 D3 {6 _" X
if 1-6 = 7-12     13 is fake
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Weight the 2 time ! O8 p$ M! i9 ~/ A4 l" _

# j0 P2 R& j& r6 t; \. V0 f% Q9 jSuppose 1-6> 7-12/ j) @% k% R6 ^. p- @0 [
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1-3 vs 4-6 6 c! S+ }3 q0 ?# V1 F9 |6 U4 x$ E

# o, I$ ]& C7 v) CThen Weight the Third
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Suppose 4-6 > 1-3: J) v8 S% z% P7 Q( R# G4 A, i
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Just like the first Step
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/ Q* N9 A, c2 b% }5 O' r4 vs 5 # @1 O. b( A8 ?- P) W
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if 4=5 6 is the fake one
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) |% X4 A; V3 c9 c, y6 q9 `1 ?; @if 4>5  4 is the fake one # B# g8 f8 w$ |' g; N: G& h

* v# h9 t- G, w( Q# A+ U! K2 @and so on......................

hello1997

分3組4隻波子秤/ G1 e: A; H$ p- f; U. m" \2 }. r
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Group A: 1,2,3,4
) h! G- j5 R( d  b& I$ YGroup B: 5,6,7,8/ Z: n2 j4 D# g* w, ]
Group C: 9,10,11,122 k, \5 R' q4 F5 C
Group D: 13$ L, [0 y4 @( V  K. y

0 a- F" z7 J  I, U4 x  m. `Round 1
  s) I0 S4 ]) H: w! d+ BGroup A vs Group B
& I% y" n# q8 W2 c$ v8 ^如A and B一樣, 即較輕一粒在Group C or D
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8 S# e9 _3 S* f0 W/ lRound 2
+ n: ?- p/ k( e# r  w再在Group C拆成:
. l1 Z/ L( F- f0 |$ hGroup Ca: 9,10
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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, & l( s# W& l* _
要再秤, Round 3, 之後便知答案.' K! w2 h9 E' x/ `1 \  T/ D

" s4 a! C- p6 ?( Oe.g. #1 假設10為較輕的一粒' h: ^" o& \9 O. s( A* K
Round 10 `7 P4 m4 X" O/ A1 K/ {
1,2,3,4 vs 5,6,7,8 = equal
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Round 24 p! @3 e7 H# @" D: @
9,10 vs 11,12 = 9,10 < 11,129 D4 _( d" b% H& E: S( b* Y

4 ]1 V. @  v, u6 p. mRound 3
/ Q$ H/ B, ^% y' O  L8 G9 vs 10 = 9 > 10
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% \# R6 g1 \9 U/ ?- v* F6 GThe answer is 10.
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e.g. #2 假設7為較輕的一粒
' J  }+ v* L6 {" IRound 1
5 X( Q) w. w" v6 T" N" b; I1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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* n& D8 ]( i2 a: u  O2 ]Round 2; H. H, n$ W" G9 h. ^% k
5,6 vs 7,8 = 5,6 > 7,8& |$ k, o6 E* F2 h, f" ^. Q9 s
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Round 3
- Z9 E9 ~/ y8 R7 n% q+ f1 R6 Y7 vs 8 = 7 < 80 t0 e5 g( |, w
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The answer is 7.
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! m$ L3 |+ N8 ie.g. #3 假設13為較輕的一粒0 r3 i3 {1 `3 m  p3 e( Q) }  J: ]
Round 1
, d( m" U6 h+ K8 v+ @1,2,3,4 vs 5,6,7,8 = equal2 _2 _4 J( b0 b! Z- ^: i4 n( H
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Round 2$ }6 s# L. i  Z4 `' D. [
9,10 vs 11,12 = equal8 f/ \0 f" p. A4 X& w
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No Round 39 M4 H- T3 V+ V7 [0 t( y8 C
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The answer is 13.' n/ s2 Q7 {" k) t

2 H" l$ u+ f# M3 ]4 |! a+ Q, m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:( c5 n- K! s+ ~: r6 r% }/ ?+ c2 O
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1-6 vs 7-123 g0 w* K4 H! X  l$ a4 V
if 1-6 = 7-12     13 is fake2 B9 ^* u5 }. K! @# J5 b

4 C, T6 f0 }+ P, ^3 `8 \' v+ vif not
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Weight the 2 time
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& C9 H, d7 W- l" U$ w, W' kSuppose 1-6> 7-12
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2 w8 s; j" q6 _1-3 vs 4-6
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" {' }' L! G+ QThen Weight the Third
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Suppose 4-6 > 1-3( |  `' c" g+ L+ D
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Just like the first Step6 J; a3 ^( w* d$ e3 B0 S& S5 k

3 i+ {( w0 E$ V8 i4 vs 5
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if 4=5 6 is the fake one
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' Q3 ^. }( w. H7 ~) a$ {* D( }) d' C# i1 pif 4>5  4 is the fake one
5 I% P7 m+ H: b+ X# qand so on......................

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問題第二步; O9 c: X& S) j% C' Q" l4 _
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Weight 1:  1-6> 7-120 u) D& W- n5 N) g! U9 J: C

: g  T4 I4 K" j1 UWeight 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???. d  Z1 a) s+ U2 h2 c
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問題第三步( X9 S) P5 K0 [) M' e! ]( Z8 {' @

" \* q" l2 n! r3 `, h" y/ yWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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1 s: _4 N: s5 w5 h3 w( L" c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