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* {9 h: F8 G9 G; u* M
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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)。
4 y$ L; @! |5 V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？』: C  p* O, `( }' s

+ k9 }" g0 L  Y. Q3 z  B" \' D注意:
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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) a) M- `( o% J; I. {- `( X7 z2. 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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; c7 X* ?3 l0 `1 C4 f  ?7 ~[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' B$ O2 K' ?9 W7 ^% C+ E2 i( b* n# r相信e條題目都有吾少人玩...

+ l/ {% p+ V1 |, a1 M6 U7 A1 [- |" |我以前畫左個chart去答,  s: ^9 ?. q6 X' b
等我搵下仲在吾在2 M+ A) y& T- C: W7 V+ P& g

7 `* R' F6 `8 N8 }當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 a2 \7 N* h+ }; X13.........
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+ H2 M2 L- `/ d: S% [[ 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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3 w8 x$ D" r( E9 A我以前畫左個chart去答,4 |% R1 [) O$ o9 `% y# E' L7 c, `
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:! O. x7 c3 b' z. P( c
唔識隱藏...已經諗到..

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sor !!!....e加改左% P/ k% a2 `' j& j) D8 w
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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& `  D2 P: T, X

! ?" h1 P' U" ~: ?[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:% @* B- n! \3 K
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.2 p/ w% ?  k1 X: |5 y, R

) U3 `0 t6 X/ k2 T  t, D. v2 a5 dThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  H) e0 F( j3 j* a

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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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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 7-122 ?/ ?' k/ m0 h9 ^9 D7 u
if 1-6 = 7-12     13 is fake+ |% n, M2 R  @
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if not 1 ^7 I6 ]- o2 m9 u- {7 j
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Weight the 2 time ( p) X; K2 D; l. n% w

# P5 P9 E- w9 z+ R( s# b7 C0 ESuppose 1-6> 7-12. j/ Y2 Y6 C/ C6 w9 M5 L
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1-3 vs 4-6 / ]. \$ J; K7 A- E1 I1 Z2 Z

/ ^3 \" v: V; j: j3 p  nThen Weight the Third) Y3 Y/ u% U+ k  {
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) A0 i5 P" G3 |2 \8 o+ LSuppose 4-6 > 1-39 ]! l8 F- |# k' V0 b8 k0 C5 o. x
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Just like the first Step3 j5 [5 x$ N$ R0 ~  S! s4 g

' ]8 t9 M* U& o( A' `9 g' P4 vs 5
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& \! v4 Q5 s+ K2 vif 4=5 6 is the fake one
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if 4>5  4 is the fake one % E9 q1 n* c% N. B" K0 [$ f
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and so on......................

hello1997

分3組4隻波子秤
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! J  v5 i. @& f5 Q- sGroup A: 1,2,3,42 e: B8 M! O! b& L7 X& X. v1 ^8 z
Group B: 5,6,7,8/ G9 E$ x1 `0 v0 G0 C" Z
Group C: 9,10,11,12/ c: M' |' B; j. C2 ]4 {4 X
Group D: 138 I+ u' E3 q( f
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Round 1
% }. q9 R8 @6 L6 pGroup A vs Group B8 u' Y1 c$ @! |9 |, S
如A and B一樣, 即較輕一粒在Group C or D
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- g8 r( X5 f$ n( B6 HRound 24 `! T- E- X# s% m, t: \* e2 q
再在Group C拆成:
9 \* p7 ]! Y) xGroup Ca: 9,10
; e/ {) b( y7 l) M! \7 YGroup Cb: 11,12- s( m% T# Q2 W! |
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,
& ]# p2 j( f1 e! Q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) W- G/ w+ ~6 p7 g
Round 1
/ z9 q* |' Y! ]# F+ _, f9 K1,2,3,4 vs 5,6,7,8 = equal# y7 Z7 }% i, a) g: h# Y% t  |  ^& g

9 ?3 O4 |2 W% a6 ~* b+ N5 _Round 24 v+ z- w1 [; m8 [4 @1 K! R5 `
9,10 vs 11,12 = 9,10 < 11,12
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+ X3 f) K& [+ r& c0 ?3 ~* w6 `Round 3
* x' `) q3 B- P' ~. }1 U9 vs 10 = 9 > 10
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The answer is 10.( m9 ^' _/ h: a0 H
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e.g. #2 假設7為較輕的一粒
2 }* P$ p3 U- Y7 ]" P: R$ v* N) fRound 1
+ Y* v% H/ [& p2 x! l0 h1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8# C  g3 ^! s& \: u1 M

! B( i  G" v  m* cRound 2
" b; g! j; C' G; |7 x& q2 u; m5,6 vs 7,8 = 5,6 > 7,8
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7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒6 f1 D$ Q2 j9 {8 {% c( r
Round 1
2 N- \' h. H$ Z! ^1,2,3,4 vs 5,6,7,8 = equal
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Round 2
  j* w" [! S6 Z" r& S9,10 vs 11,12 = equal9 q: p6 b2 Z# Q4 l
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No Round 3
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1 ~% q* I8 ^& F1 b* K# C2 AThe answer is 13.
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唔知我答得正唔正確呢?! 8 n* T* }+ ]1 ~
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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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1-6 vs 7-12
1 U" \' p7 y: v. h. Bif 1-6 = 7-12     13 is fake
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  H% {4 Q' T, E, x- aif not 1 H8 b, E( v; ^2 I+ c' e0 [2 R
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Weight the 2 time
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0 b1 \" Y3 X5 a8 h+ _  l) h1 bSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third8 h. _9 S- a2 ~+ P9 g4 n* Y  S6 J
3.
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Suppose 4-6 > 1-3
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5 q' B1 U7 M- s6 TJust like the first Step
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( k0 ]) p7 e5 r4 vs 5 ' |3 [1 a9 Y. k# U  i, J$ ~

8 W. P% g3 Q' vif 4=5 6 is the fake one " z/ {" I8 _; d

+ b, \1 l3 e! L# Bif 4>5  4 is the fake one 9 Q' ^9 M9 r4 b
and so on......................

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6 p( F4 N  x6 N' j3 h8 I問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6) }" J. F* ?2 G) s& M: A3 c3 Z( W$ H0 r4 Y
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你第三步点去搵 7-12 边一粒???/ G& o2 N/ ?7 k/ D
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========================================
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5 j, i% ~. r" P2 D8 J5 _3 h問題第三步
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  p: n, |' a7 T% M& wWeight 1:  1-6> 7-127 C/ e9 {( c; [& G
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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