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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5 R- N$ y, Q! g" K『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)。
7 g) o$ A% q* S, X% y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: 7 s3 L: q- F) H9 n$ _
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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' T3 W% X$ T9 x+ a
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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# {$ U6 C% k  ?+ `- C' u* Q

% N9 q8 O% o1 M; A$ @[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
+ F  M7 K& c: h; }) D4 ?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,! B  G! f' C5 Q
等我搵下仲在吾在
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+ f4 y" [6 ~) p( P' l3 S當日用左37分鐘答１２粒波子，差７分鐘才合格。
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$ R9 M- W+ p  V* Q2 t[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:1 j( G6 O; G9 g. ~
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我以前畫左個chart去答,
$ M7 p6 d! ]: a2 E1 X等我搵下...

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6 ?( o" O/ t4 ?$ i0 d, j. r! Z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:1 m! E& D- L6 t6 N9 t$ i# m
唔識隱藏...已經諗到..

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sor !!!....e加改左
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; r5 y, t) G6 Q) d2. 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7 M2 T& |# ^- }( L6 `

& Y- p/ e6 {  Y4 E[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:# s- D/ ~  \4 _/ P
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./ Z4 H. g5 H' ^" U" x: x
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Thanks

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.
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3 J3 K: {7 q# _- c* k  G7 b( Z. wThanks

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: {9 l1 f% l3 H5 f8 I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
$ p" S' N8 ]( {8 n; C% oif 1-6 = 7-12     13 is fake
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if not
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4 ?3 t& |* L; b& G2 O2 fWeight the 2 time - n. i6 {- \4 o4 q3 O; i6 g
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Suppose 1-6> 7-125 e& ]8 J7 T5 d8 h8 q. I
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1-3 vs 4-6 , p4 h! C9 P6 n, b

8 S% h3 P) L! {2 ?: CThen Weight the Third1 A  }) F# _8 n, @5 O+ \4 r7 S* J9 d
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% i3 W1 g3 `8 ?: SSuppose 4-6 > 1-3
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Just like the first Step- Z1 u7 [0 M2 q
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4 vs 5 - v/ e6 t, m3 p" S2 ]2 J# M
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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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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4/ j- D: x; L, e& Z3 f6 z
Group B: 5,6,7,8
2 `0 K* z1 b& kGroup C: 9,10,11,12
6 I# U( b' r8 v1 C' `- ?Group D: 13
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Round 1
$ X" M/ s  W/ b! HGroup A vs Group B, G( m- t$ }% ^2 r+ C* M4 W
如A and B一樣, 即較輕一粒在Group C or D
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- U" G: s- n. VRound 2, c( H% R, }, U8 q% X( p
再在Group C拆成:
8 }* R+ }. j/ i  NGroup Ca: 9,108 q- \& d  M) k, ~  ]) \7 o
Group Cb: 11,12
4 M" m8 y4 S2 t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,
  `8 y1 R  z2 X! ?/ a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
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5 q4 e" |: g5 i7 i' e! f1,2,3,4 vs 5,6,7,8 = equal
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Round 2
6 m! E& J; I4 k( E# ]3 m8 {/ n9,10 vs 11,12 = 9,10 < 11,12$ T1 V% g4 ?- s3 r: t3 o  g: C, r
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Round 31 W  G  @" m; L" @" P
9 vs 10 = 9 > 10$ y, p7 ?) G; X4 _& Q
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The answer is 10.& i6 q4 \4 o% z4 `

0 u3 U; b. ~) E) F0 ]e.g. #2 假設7為較輕的一粒
# \, _& Z+ V; K, _3 @' |/ V* s3 jRound 10 y( p3 W! ]* ]7 W3 f
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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& ~; ^( [: l2 |5 }7 D+ g& eRound 20 a( L7 K# B1 F" v
5,6 vs 7,8 = 5,6 > 7,8" s( ^9 ^: b/ {. E* r1 T8 C4 j' o3 b
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Round 3
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/ I' v: o4 ]1 x' K8 Z4 ^The answer is 7.
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: C* z  D  E. ^* i1 ~; v  a9 h; _e.g. #3 假設13為較輕的一粒6 c' v6 Z% \( ^1 Q6 T/ ?4 A
Round 1
+ W- R. N! D* T4 k  \1,2,3,4 vs 5,6,7,8 = equal
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Round 2/ o+ c9 _+ Y: s! o' M; ?8 F( X
9,10 vs 11,12 = equal2 [5 K3 `: ]7 @3 g  `/ I6 X. H

) E/ L) M- E" p6 H1 a2 e$ HNo Round 3
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/ ?0 D* G9 ?( I% W5 X* ~The answer is 13.
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唔知我答得正唔正確呢?! : e& _* n0 z  }% v! u% `3 ^6 V

7 X' e( R; |9 f[ 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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4 g; q3 k/ h& J" _1-6 vs 7-125 t+ t8 @. U! ]/ X# w- \
if 1-6 = 7-12     13 is fake' E7 _7 j5 S1 e' D( s$ ~2 f3 z
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if not 6 ^  ]) i0 O) N1 c( E3 F/ n
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Weight the 2 time
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Suppose 1-6> 7-12. ~2 c' G  g' ~. `, A, t/ \% r

. X5 m/ @3 I+ U; M. s8 ^* o6 h1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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3 B$ t" A9 I& L& h; m* f5 F! Q+ ?3 x0 tJust like the first Step
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4 vs 5 3 g6 \$ V  b1 \# }" R1 K" E% e

8 d' N& G, [$ d5 F2 }if 4=5 6 is the fake one ( c4 |& F) N" o% P$ H, Y
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if 4>5  4 is the fake one
& F, A6 E! B% V/ {and so on......................

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- ~- X6 ]: O( i3 q9 j( h問題第二步! m6 J# h* H- m* R

/ D1 }4 Z5 ?! c0 A% o$ zWeight 1:  1-6> 7-127 |1 z3 p1 Q0 p* E. X/ t$ V

# K- e( P: {/ wWeight 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???
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========================================
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5 q  Z" @+ T* F: A; E問題第三步9 }: A4 H  _$ w  ^! \

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Weight 2:  4-6 > 1-3 + H- W/ R$ ~- j7 m3 G6 J1 i
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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