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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( h7 M" \$ k! @4 X5 M' Z『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)。
& J( W/ W5 y9 e; }/ u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？』, A' C( V7 d0 M9 f$ o, Z/ {# Y/ o2 ?

/ o$ X) B1 O5 @7 }注意: + q" \: S: A& w7 c2 B* i
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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2 u4 O7 l' J# z+ c! B

1 y2 j( r+ ]' o  [: M2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:* c- e7 T9 D  @$ O8 M
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,1 R# Z0 G. A& c7 e' |
等我搵下仲在吾在4 M& z; @9 @: i9 y# y
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當日用左37分鐘答１２粒波子，差７分鐘才合格。/ f6 h5 z6 [' L1 ~; F$ E% b
13.........* m2 L9 F/ n; M
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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:
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0 o1 ~# G$ X  D) n; @我以前畫左個chart去答,
3 z( P# U* \. v! p等我搵下...

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4 T; V  e# q3 K( _# Y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:. W1 Y6 S  X, F3 `1 a$ }" v( A$ A
唔識隱藏...已經諗到..

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4 A( o4 H. F/ F/ ~sor !!!....e加改左& [4 `1 o: n. z5 h) G, J) G/ J
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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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$ C8 _/ ^, R0 ?; i7 M5 k[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:! G3 c! [; P. I
相信e條題目都有吾少人玩...

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& g3 q2 A0 V$ ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.8 ~. c4 ]9 F! \6 \

3 Z; W2 R5 g+ C3 j& HThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:! g+ a, t+ f  a6 |% u" T1 V& j
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.- t5 b0 a) b3 Y; i' t. a6 b6 j/ A
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Thanks

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6 w* T2 Z8 V9 C- Q0 W不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.* i7 J$ ?# }  N$ I4 S* ?
1-6 vs 7-12
7 H! R2 ~$ h/ C+ V. k* eif 1-6 = 7-12     13 is fake5 l8 g2 f4 @$ |( ^
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if not 7 d$ v! z8 L4 @& G3 k6 T# d
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Weight the 2 time
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Suppose 1-6> 7-12+ ]1 j$ S- n+ e; {) n' F5 d
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1-3 vs 4-6 ) Y6 A, P# I$ a; r
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step2 i! l* Q8 M; }
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4 vs 5 $ a3 }3 _/ x7 ?6 c/ I( [* V

3 w( ^- X1 d. q+ }, G" [7 w2 X) c8 tif 4=5 6 is the fake one
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0 l2 v5 g( n$ eif 4>5  4 is the fake one
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- m2 a+ x" z; [and so on......................

hello1997

分3組4隻波子秤% b% r% \0 }5 O: E" r

: X! S$ a/ d- m9 I1 h7 xGroup A: 1,2,3,4
# D* k' M2 b. EGroup B: 5,6,7,81 Y) L$ v  e& V* q9 j2 h
Group C: 9,10,11,12# Y  R" H% p5 O/ n* |; z# B
Group D: 13! K$ }. c; `' Q

1 X; K2 M& y7 ~' _/ XRound 10 {7 T* h/ ~, p- g
Group A vs Group B
3 B4 r6 M* S" P( M* c. ~4 A  S- r如A and B一樣, 即較輕一粒在Group C or D0 j% W1 b7 P) e2 X
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Round 2
: w1 E! g4 S/ M: d" e! a再在Group C拆成:
$ w6 G5 ~% V0 C  j1 O" e5 \Group Ca: 9,10
, @5 O" x4 Z* F" F1 f; R0 tGroup Cb: 11,122 @; {3 `3 s( a
然後再秤, 如一樣, 即13為較輕一粒.
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7 q; O  c  h9 Z, J$ D如不同, 即較輕一組有一粒較輕波子在其中, % x0 T" b) ?, x9 a# L
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5 i% u6 X# X$ Q& I
Round 1- T2 w# v2 o5 f; z
1,2,3,4 vs 5,6,7,8 = equal
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$ h) K5 l0 H# v+ qRound 2
, F* U" u6 J, y3 e  `, N3 w" f9,10 vs 11,12 = 9,10 < 11,12, {! f% b* a- d" ]
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Round 3
! r( x. a" [8 O0 T$ q. H% m$ u# L9 vs 10 = 9 > 10
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6 x( L  c6 P* z9 }% |6 ~- HThe answer is 10.$ p1 f) |# w6 c  }! i! u
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e.g. #2 假設7為較輕的一粒
4 N- n9 w8 a; c1 `4 dRound 1
* {7 F+ Q- V* X' I7 o& s) Y. r& r- l* N1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,80 O* D, \2 Y. n: `' ]

5 u& x1 C" t, ]Round 28 H3 I' W, j# ^
5,6 vs 7,8 = 5,6 > 7,85 a7 j* {# T- e  s/ [
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Round 3
+ H. p/ \# q0 X7 vs 8 = 7 < 86 S* ~3 I/ B  A: B

4 N2 H+ N6 Q; x+ E" ?. WThe answer is 7.& W$ z2 Q% \5 n2 F4 o8 n

" ?/ m/ ^7 O6 V' {; Ae.g. #3 假設13為較輕的一粒
9 q' |& q( J! ~Round 1
; T8 W) t9 L& l' J% `9 g% _1,2,3,4 vs 5,6,7,8 = equal
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4 S0 q2 W5 P& {% IRound 2
$ i8 g+ ?$ h& {9 ~4 a( _9,10 vs 11,12 = equal
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No Round 31 e3 U. Q7 i. w& Z

( A  K! }# e7 i* ]5 L! m$ k9 t$ jThe answer is 13.% T/ d, ]7 z# g# h# Z+ J; N

# N, t; O$ `3 b5 U$ U; c8 v+ O唔知我答得正唔正確呢?! % f9 \/ Z# S0 J  N; k. a8 m
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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:  T( R6 z" a" d' u
1.
7 w7 A7 E" f2 W( K/ a1-6 vs 7-129 i/ K" ]3 [9 X& z8 L
if 1-6 = 7-12     13 is fake
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if not . ~5 V! Z/ O; ]' W" Q- ~& Z' N( f, |

6 Z* r8 i1 F5 R) n* vWeight the 2 time ' V# q3 P+ _+ d' y, K

, l6 @% H( y9 i1 d; @Suppose 1-6> 7-12. H5 X. W( e7 Q8 M* l8 E4 Q: x
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1-3 vs 4-6 ; V9 F% U) Z* [* J& S( X: N' W- R
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Then Weight the Third
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3 P/ O6 L$ [3 K: P4 _, s( _7 k* Q! ]Suppose 4-6 > 1-38 R/ q5 m. @, S
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Just like the first Step
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4 vs 5 / \2 R# R$ J5 M, K3 g
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if 4=5 6 is the fake one & Z( u5 g* \) V

# j, u2 E7 j% K) l5 W" X: hif 4>5  4 is the fake one 8 {5 Q) Y9 X! T! p( t. A
and so on......................

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8 D$ V" {5 P2 k2 G問題第二步
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8 ^( }3 F' C/ s0 s+ P& v! HWeight 1:  1-6> 7-12/ G& A, z& p) U" Y
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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; _0 J. x. ?& }你第三步点去搵 7-12 边一粒???$ E7 u* u1 W' r6 z. s3 L0 x
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========================================
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' c. M% B1 q; p. b9 t問題第三步( w1 L9 b$ i6 w7 N3 _1 @
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Weight 1:  1-6> 7-12% Q0 E. R; x* Y+ e  T

: a+ |" M/ K, ?* O, cWeight 2:  4-6 > 1-3
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2 _/ ^- E# c0 z- A& [/ W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