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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/ I$ L; P3 J6 s『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)。: ^" N* t+ r9 W7 C% N- M  S
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: & L3 f8 d8 y$ D/ I* P  g
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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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- X' p; ]7 i( P9 O( m9 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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9 ^- L  U# A3 Y2 c7 n: p( \[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
3 V4 }8 ~- V3 f) s' J8 a相信e條題目都有吾少人玩...

* w- H% W# k) X+ O$ E, D我以前畫左個chart去答,' C# y* W. P3 e0 \
等我搵下仲在吾在& N+ y  l" W3 _- a1 ~1 T  u+ k5 E( G
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
( d% I, c: V1 G. O. T% x1 N' Q13.........2 p. w. C: j; N! t9 {( }/ [0 H

! \; s4 w9 i5 |0 Q  o( z% F[ 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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4 v7 c) w4 _% O# A. E% u; u我以前畫左個chart去答,
* J2 [8 }) R3 B  R6 J7 u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:1 q# {8 y, V$ i  k
唔識隱藏...已經諗到..

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sor !!!....e加改左1 D7 w4 k9 s( x) }1 U3 `
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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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/ Q" [$ E* q& ?5 x[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:% r' V4 V) b- C( w
相信e條題目都有吾少人玩...

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6 c' w: q* f8 v& g0 ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.) b: ~# K8 L& R

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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: v* d. `2 p9 c5 V& a2 jPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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4 B; ?, O% M2 ^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 7-12
0 J" I9 z* u5 J/ Aif 1-6 = 7-12     13 is fake
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if not - P# @0 l6 g( }6 R! [9 ~- b$ b
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Weight the 2 time * N/ u( S# B1 M
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Suppose 1-6> 7-123 [  U. b- J( v  }& P# q
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1-3 vs 4-6 ' X9 X" m, |/ w

3 d1 I5 Q$ |8 C# z; ]& ^% Z9 nThen Weight the Third; |# `: x5 D: U- @! m/ s2 F. I
3.
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Suppose 4-6 > 1-3
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; T- F: s$ ]. V; k% i" tJust like the first Step* g: T" v( s" ]# r9 D5 D% o

, p9 o2 `+ \# T6 W  ], Z9 E4 vs 5 ( V/ [9 ?/ h9 D, o% |
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if 4=5 6 is the fake one 9 r/ D5 y. v$ n6 i1 D4 f2 ~

5 @/ R  r. a* q& ^8 y2 Z6 nif 4>5  4 is the fake one 7 Z% E7 ]7 {8 x8 V9 p

$ B* K& B: T0 A; u6 y; _and so on......................

hello1997

分3組4隻波子秤& t5 n, T; l+ @6 ^* {+ l
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Group A: 1,2,3,4/ X; F. N5 \  m* e" g6 v, x
Group B: 5,6,7,8
4 g8 I8 c) p, a) P5 G3 Z8 DGroup C: 9,10,11,12
4 N, b& y- S6 T2 A2 j0 DGroup D: 13
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3 Y* ]) R5 J7 ]: j8 L7 qRound 1
7 C7 U& B$ q8 T( i5 s( m" xGroup A vs Group B% J, N0 v; }' s0 l$ I7 \
如A and B一樣, 即較輕一粒在Group C or D! ~8 y8 n6 a& O  r

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再在Group C拆成:3 l% \& U/ A+ _( U# l7 s' j' I
Group Ca: 9,10
. A9 @+ J6 r' L) f' X9 xGroup Cb: 11,12
: ]; `3 P+ a3 G$ R* J( w! Q然後再秤, 如一樣, 即13為較輕一粒.' ]3 p9 e8 w: j5 K2 \3 W/ S
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如不同, 即較輕一組有一粒較輕波子在其中, 2 z6 N8 D& k- k# q1 W3 l' 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$ D/ o- q$ `7 K- z% U( S3 z
Round 1
' v6 r5 L6 m/ H1,2,3,4 vs 5,6,7,8 = equal1 G+ c2 ^+ {4 _: w' w$ d+ a- {

, c# _  D! E- Y* f- j# B( mRound 2: C! I3 J) |' _* F2 Q  z
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
$ `+ l4 t) S& Z3 f- U  h% U9 vs 10 = 9 > 10
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7 V2 B5 Z- O# Y. g! o- H. zThe answer is 10.
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e.g. #2 假設7為較輕的一粒  |; |- P, N9 a( Q) L
Round 1! ^* ?# P* _. b* ~
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
  g0 p3 h6 \5 O. n- v; \1 ?7 l3 h5,6 vs 7,8 = 5,6 > 7,8
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7 A% j0 z, J; |, P) o' `+ M4 dRound 3' h7 K/ ~) N) s- H
7 vs 8 = 7 < 8
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8 T6 u& y2 Q3 {" x: ZThe answer is 7.
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0 v, I, i8 a$ f5 N8 [& P( r9 c% se.g. #3 假設13為較輕的一粒% i& q( u7 ?$ R8 j
Round 1# P' }' S, ~" F- i5 r  A- X
1,2,3,4 vs 5,6,7,8 = equal3 V' S: n4 u) c. g

1 o$ U; i) V; h" z% V  ?Round 2
2 _4 H  Z# U: P6 b% m0 E9,10 vs 11,12 = equal$ b, b" ?% I) W" y) x. B* Q6 k$ r; ~

5 o; |9 h* `3 \- RNo Round 3
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) C3 d" i# w% _9 J( `6 L! w3 LThe answer is 13.
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  q- V  i7 O, `9 v3 n& w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:0 z' C! n+ z6 D' ~! G  L* O. b3 {8 L
1.
: L6 |( U; s9 {9 J$ Z* V1-6 vs 7-12& {( m7 n1 A/ @! b8 b: P9 u
if 1-6 = 7-12     13 is fake: r  U9 k3 T% S
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if not : m! p! ?5 o! ?& A
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Weight the 2 time
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7 R" i7 q+ O& k; dSuppose 1-6> 7-12
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1-3 vs 4-6 - d1 n4 j$ r; l
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Then Weight the Third
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Suppose 4-6 > 1-35 K6 ]/ Y; D% e$ f3 |
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Just like the first Step& `8 s* ?  L. O$ K+ f$ y

8 k) d' y- `7 j3 X- B9 o4 vs 5 # n: ~. F0 b% s( Q

7 Z% `! G2 ^/ o; iif 4=5 6 is the fake one
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if 4>5  4 is the fake one
. g" b7 X' R% a5 R8 _% Gand so on......................

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- ~  c- g. T# s/ _( l# N) A8 W問題第二步
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Weight 1:  1-6> 7-12
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( J0 r0 w9 q. a  {3 j# K6 U3 ?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???+ Z( U& ]* v' x
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: a5 T/ L# m* {+ |( f3 V問題第三步& [7 n% }3 |" ~3 ?9 c2 d

) j: m; d8 j, P) R' s0 y; J/ S% @Weight 1:  1-6> 7-12
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) N8 v- U2 g/ N* GWeight 2:  4-6 > 1-3 0 {& c+ _' |+ r9 D0 I1 g2 G, p

- s9 R  ]( h( g4 g" R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