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6 N( h; s8 `3 n  u: |; n
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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)。6 i2 q8 @( b9 Y- E/ 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？』  s# }7 x! |* S6 v7 ^
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注意: * y' ~* L; y; j/ Q& Q$ {
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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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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9 v8 Q2 G! V( X; X8 a7 `
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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 21:34:3 m+ v0 D3 D$ d' h+ u
相信e條題目都有吾少人玩...

7 |' r3 i* I. E0 b" a8 J$ J  @+ \我以前畫左個chart去答,7 A/ V& k  _& l9 d. W# Z$ K+ C
等我搵下仲在吾在1 g% r  z" D* s* k# M7 R7 r0 y
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當日用左37分鐘答１２粒波子，差７分鐘才合格。" c/ u( I3 _, R: @0 s0 {
13.........1 ~# f3 M. a1 ~; P' v
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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:  f  N# x3 b7 }' F/ \) l. L
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我以前畫左個chart去答,) Z; C# O7 r8 p) j) x% S( \# @& E
等我搵下...

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1 Q1 l- y8 J+ \5 B- Q9 |$ T. g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:2 _# H7 \. p/ C& E
唔識隱藏...已經諗到..

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) y8 E2 `2 L$ x8 Vsor !!!....e加改左
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  F2 o* \0 T3 C! D. q, N2. 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& O1 Z0 m( f  v, {3 Q2 U
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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:
0 q3 H( ~" ]# N% _1 _相信e條題目都有吾少人玩...

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' D' _! f9 c! _  L- M7 DPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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. |9 b: L6 L. o' h2 p' hThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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& o7 o: c7 h6 c) ^% l! \$ @, A4 tPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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" }" s+ r4 x! z) e3 w7 q1 R$ v7 yThanks

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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- z9 R2 ]8 i5 \
if 1-6 = 7-12     13 is fake
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if not 0 V' U& O# x% d
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Weight the 2 time
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2 m6 m( B3 M+ {4 eSuppose 1-6> 7-127 E; [7 R+ ~. n% u: ]

# z& o( y& Q2 k* O* H% F1-3 vs 4-6 8 K7 A# m) j7 Y% m3 ?
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Then Weight the Third7 \. L8 v4 {' ]/ d6 _0 |
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$ p8 M  S: l, @9 z2 k; }8 pSuppose 4-6 > 1-3
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" W0 o$ Q* F; E) IJust like the first Step9 r5 v4 n! |7 c7 Q1 W. B/ f# k

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if 4=5 6 is the fake one ; {/ {6 k! O' x

0 b- j" z) Y* ?$ y2 k5 r8 lif 4>5  4 is the fake one ( i: P# C% W7 s! f4 ?  I1 [6 v

1 X+ f+ }: \: r1 r3 P8 G" yand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,46 H$ l+ O! A$ u- E5 W; c
Group B: 5,6,7,8% l& R# \. G5 X( Q6 g0 U: x* g, ]" K* u
Group C: 9,10,11,12
: R% f1 U# j( U- o$ Z) D( wGroup D: 13% g+ W% c- m- m2 p! T, M; C

$ L5 B1 u" M9 u8 H8 D0 N# ]7 QRound 1
0 W* [& K1 g" j; v6 g6 g2 GGroup A vs Group B
3 \6 L) {+ s2 |3 E7 o: u* S# q如A and B一樣, 即較輕一粒在Group C or D* u: P0 H% j+ N8 X1 i9 p

7 r! {0 o0 F5 I' N6 bRound 2
5 s9 f; x9 E) O; d" e/ d6 o再在Group C拆成:
* ^5 b$ P( p' w: z( hGroup Ca: 9,10
$ I4 o/ _9 ?/ v- J, pGroup Cb: 11,12
6 b8 k6 r) e- F3 k& L' G, C然後再秤, 如一樣, 即13為較輕一粒.1 _0 y: A: K+ W7 [& J# |9 Q& A/ d
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如不同, 即較輕一組有一粒較輕波子在其中,
0 N4 K6 ]' a7 n要再秤, Round 3, 之後便知答案.% {  r+ H6 b$ c& w6 D
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e.g. #1 假設10為較輕的一粒
) d3 h% K2 k% E: q2 y8 _4 O8 E- _9 cRound 1
  Z% L6 j: ?$ O1,2,3,4 vs 5,6,7,8 = equal
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Round 2
1 C4 _  Q3 o# Q/ F9,10 vs 11,12 = 9,10 < 11,12+ O) @' E5 o" f6 j

  C/ L1 E; F8 d) k6 \2 V- u6 PRound 3, Z( G* e: p- @" }6 M4 z+ ~' Y
9 vs 10 = 9 > 10% M# Y- T$ m$ C0 l3 p. l0 z

' H) K) P2 t+ q. q& oThe answer is 10.
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e.g. #2 假設7為較輕的一粒/ @+ r" A  l$ f
Round 1
. T9 V7 m: g( ~! H3 r. s1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& }) U8 O7 i8 q3 R1 r
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Round 2& t. B" v+ ^( t! L. Z( c% L
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
# V+ S) w/ X2 W. P" e7 vs 8 = 7 < 8- m; s% {6 M4 ^3 N/ l9 Z
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The answer is 7.
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e.g. #3 假設13為較輕的一粒4 T: t1 n$ y- i1 J5 L: ?
Round 14 E) J9 Y+ S3 g/ u
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
- W+ D! H' D, K9,10 vs 11,12 = equal
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: D2 r$ s" F/ S+ GNo Round 30 b5 x$ W0 {9 U6 g
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The answer is 13.
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唔知我答得正唔正確呢?! ( g+ ]; n( I, z5 n- D& r6 T

1 r% @) d; t5 F  q" g; s2 L[ 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. \" w  X4 N) j5 h+ t
if 1-6 = 7-12     13 is fake- A) B; x) H, C: w# e! r% l4 L
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if not
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Weight the 2 time 8 ?4 ]4 ?' K$ ?1 A+ m

7 {# l  e% ]7 i- q) O6 r& gSuppose 1-6> 7-12
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1-3 vs 4-6 1 q. G: f+ }2 _6 n& S
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Then Weight the Third$ B4 S" z$ i+ H; v% B; b2 }' s
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Suppose 4-6 > 1-3& q  R( N, G& i7 S6 ~$ F! j# [
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Just like the first Step
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if 4=5 6 is the fake one , n4 Q0 Y% }! c( J, f4 ?& q) C; `
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if 4>5  4 is the fake one $ Z0 E5 O, S+ Z  t' |# J
and so on......................

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! [# ~/ A+ J8 B  g; W7 c問題第二步
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9 O) s% g  _" g) D) u, n# Y3 i" a! IWeight 1:  1-6> 7-12
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0 Q2 ?! W% ^9 H) X" y# Y2 N0 oWeight 2:  1-3 vs 4-6 , if 1-3 = 4-66 A+ ?7 Z* b7 [+ m1 q8 ^, h9 @

0 H9 r3 f; \; w, D你第三步点去搵 7-12 边一粒???
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問題第三步' N6 d* `6 ]9 ^- E+ e
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Weight 1:  1-6> 7-12. s% f. p# V0 X2 u
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Weight 2:  4-6 > 1-3
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7 c! L# J6 P5 L; I8 S/ 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