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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9 W) ]$ H4 t2 |& j# i! V『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)。
* s# s8 C& M  R, Y! y2 |% P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？』: v# w# T  u( u1 F1 @6 z4 N
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注意:
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6 h+ ~( r1 i. z1. 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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. |. S( B+ f, C& u, ]0 q' v2. 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% O. e8 |" H. m- Q: i2 V
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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:
# n1 A* c6 M: n2 d8 G# C相信e條題目都有吾少人玩...

$ J) \( V. N8 H- K- t/ W我以前畫左個chart去答,
0 |, A7 X( I/ r4 ^" p等我搵下仲在吾在
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/ p" |6 I% w  {* h當日用左37分鐘答１２粒波子，差７分鐘才合格。
0 o5 X/ C3 o" w! t$ a, V4 Z8 g13.........( f# V. r8 \3 d9 n, r
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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:. O' Z% u* x5 ^  ~. B) B( n
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我以前畫左個chart去答,+ F# z9 ^- H, P, ]
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:. b9 J% d' I0 E& w+ b  O4 r
唔識隱藏...已經諗到..

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sor !!!....e加改左
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7 J; l, T! _$ u! _) A1 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/ ?0 j$ M, q$ z1 U; }# g% ]  i% r& u. h( q
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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:
% L: o) k8 y& H( r7 B& s& U, S$ X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.# Q# t5 o9 F/ ?6 k6 z' \# v" L" P

, O# T( P" ^+ u3 pThanks

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.* [& f4 v9 x' C5 w5 X: N
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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

1.! n: j! h+ ^$ j4 @% c0 O/ B
1-6 vs 7-12' [$ Q% u' t/ q2 ^8 `
if 1-6 = 7-12     13 is fake/ h: m' Q. b; ?* d

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5 t# R: {, J" o8 f& GWeight the 2 time
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Suppose 1-6> 7-12
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1 z$ m/ m) t) m5 I8 L6 f1-3 vs 4-6
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2 @9 o) H' O! n1 L( E' e1 X; t$ M8 q* VThen Weight the Third
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Suppose 4-6 > 1-3/ k+ |; k* O8 Q8 E; R# S% t
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Just like the first Step, T5 H: O/ h5 i+ {

, k2 l6 Q. ~+ S2 B! A6 o/ w  b4 vs 5
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# }% Z. u0 p: k9 D$ [% j5 tif 4=5 6 is the fake one   c4 @" t/ ?0 M( l% q. I6 W

) a: F: n9 D7 [8 C% v$ t" b+ v! j4 uif 4>5  4 is the fake one ) S; {0 K6 Z+ h5 G6 l9 p+ E) m

# Z: C- d- ^/ R5 V  n  Wand so on......................

hello1997

分3組4隻波子秤
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& q0 S3 D" O# u( n) [2 ?! b6 I  {6 x& MGroup A: 1,2,3,4
+ n+ |1 p: _2 D6 h3 P2 r) z3 uGroup B: 5,6,7,8
/ b2 U5 d3 t% ^$ S/ D" ^Group C: 9,10,11,12. \' v8 K4 J3 q& v! X5 U
Group D: 13. W: [* I! B! X5 V/ q7 d" x
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Round 13 r: S7 _/ X& V+ T3 Q
Group A vs Group B
1 i5 i4 L& r) z) R如A and B一樣, 即較輕一粒在Group C or D
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/ \3 K1 K8 N7 Z$ h2 i: o0 URound 2
9 [3 p- O, {4 `( y4 B, M$ b再在Group C拆成:$ W% {  H' ]3 ]
Group Ca: 9,10- f) R0 p0 S- H$ q) X
Group Cb: 11,12
" M. J/ p1 }; ^! l2 v0 x/ C然後再秤, 如一樣, 即13為較輕一粒.5 W  e* A- K5 u9 `& L- d5 d8 G3 m

- B% U7 t% F8 M4 H& s+ q如不同, 即較輕一組有一粒較輕波子在其中,
, h, x5 D1 ]% m, f3 G. \8 ^" E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* [# e0 L2 k8 V& I4 n2 H
Round 1
, p, |2 b) G- D( ~3 P( @+ g1,2,3,4 vs 5,6,7,8 = equal
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- G' u+ h3 F  hRound 2
7 _- ?: w+ P1 I- ?9 u9,10 vs 11,12 = 9,10 < 11,12/ Z5 z  \$ D2 N$ d1 O# {
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Round 3! o, g8 j: f3 j$ ?3 S
9 vs 10 = 9 > 10% s; U4 R1 }/ n: b

& S* W, n0 }5 {7 w2 ^! Z  |The answer is 10.
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" k* ?/ [/ y& Z9 ue.g. #2 假設7為較輕的一粒
! Q9 g' _8 s6 ?" URound 1
) N  k: V4 A3 o7 z1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,85 j% h+ e$ P4 ?7 {( q

$ b: b; o1 e2 |( X+ z) k* CRound 2
/ A$ E( R$ d0 n0 b! T( e& p" X5,6 vs 7,8 = 5,6 > 7,8
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" D" d: i6 \( w  [- ARound 3
4 v# l' ?% \" W! @- m7 vs 8 = 7 < 8( c) C9 ~1 I) A: d4 i; b. S' _& _; E
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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 R: i+ L  c0 U- A
Round 1
- J; r- F  B3 Y, U; a! K- y9 B1,2,3,4 vs 5,6,7,8 = equal% x& [. Z( ^& x4 y5 ^' M

% J; M3 E/ w1 E! IRound 2
9 ]. G& d% T' }& G3 ?. G( J: t9,10 vs 11,12 = equal
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( ]5 E- y: C% g+ L" G9 {No Round 3- r( P7 n$ y# A; w3 {! i
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The answer is 13.
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1 u# ?' [2 S2 f) H1 x/ {唔知我答得正唔正確呢?!
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, R) P$ U* N+ k' L4 j5 T  h[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:1 Q3 T  p0 U  P# f9 o0 t9 V4 A
1.: n7 `. a6 i* N+ M4 w' W1 G/ K
1-6 vs 7-12+ o" j; l, `& R8 z, o- y4 ^
if 1-6 = 7-12     13 is fake
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if not
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" i& m4 J7 J: Q3 e: Q1 IWeight the 2 time
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Suppose 1-6> 7-12' @5 }: I; J$ x$ q1 L+ Z% H- o

( Y" p1 ?% N( }1-3 vs 4-6
+ P- h! a6 H% L; |
0 L& ?) ?5 y3 M6 zThen Weight the Third0 u$ v0 O/ u0 c5 V6 O6 e
3.
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Suppose 4-6 > 1-3
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0 I" ?0 l3 G! S) ^& [, s) hJust like the first Step- `5 f3 C; p- Q0 J; a

6 l( j$ U/ x# G5 q2 G/ g8 x, h# f! x4 vs 5
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& }" c8 V9 G& D7 Mif 4=5 6 is the fake one
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  G% H8 |' y0 z0 bif 4>5  4 is the fake one
( T& ~6 \/ N" s+ h6 V# ?$ w7 ^7 sand so on......................

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問題第二步) o1 J3 P9 W# a& H: d, E
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Weight 1:  1-6> 7-125 f7 s2 L% P$ v5 t
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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???
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問題第三步
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# J' x- r3 q9 }+ ?9 C: jWeight 1:  1-6> 7-12, h, ?4 R5 l" F/ b- Q: D: C

, z2 E9 F, b3 _Weight 2:  4-6 > 1-3 8 q7 I! `# E2 @! h9 p' [# B+ X4 R

+ y! H1 L  E4 y2 E& L( ?0 Z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