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! @8 `% q& x' c" }* S# B

1 O1 J7 b. b5 r『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)。/ x: A' B/ X# E' M" Q( \
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？』, K3 o0 w# X5 K

4 w0 `7 c! P& R9 b+ q6 m3 K注意: - }( x+ w! r! d* L

" U2 d# }4 Y- @3 t0 |* X: y7 p1. 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/ w$ w1 Q$ s+ [6 i/ t

' x6 P; I* U% C% k2. 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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$ k4 ]. T- U' y! |; n[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
5 W/ v% F1 R) ~" Q5 \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,
. p% `3 v6 ]. p: L$ `: B等我搵下仲在吾在4 }' }3 p0 r* c; ?  q

* \6 {6 F4 e7 r* G6 G當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 n, j0 y/ H9 l* n: w13.........
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: C! {0 }" L/ c' W/ S[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:  Y2 T2 s( e" M+ M: ]

1 N2 ]* `- K$ a, p* W& E$ R% L我以前畫左個chart去答,
4 Y! t6 {- m7 I1 h( W等我搵下...

4 Z2 {9 G3 M  [' J
. K5 L4 }* [  i* }; i/ q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:
0 \+ R4 \. D" c! o6 ?* j唔識隱藏...已經諗到..

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+ w1 V/ e. u* R0 p, O) R6 `# tsor !!!....e加改左! m2 P% y/ g7 m# V0 f9 U. r* F

5 D# r* C- D' u, H8 D5 H2. 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: m/ ]& J- c$ i/ k& `& ]

  S. w, a. R" m; ^; U/ I[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
+ i) ]1 H6 e- S  R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.
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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.
  ?4 c" I# E# s$ b! Q: F
, P1 w0 N* [; l/ d1 V' fThanks

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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.
5 d; `+ m9 k4 C# L1-6 vs 7-12- r( a2 K  F4 V
if 1-6 = 7-12     13 is fake
7 g) S6 A5 K9 r8 k3 T* V5 t7 L6 t: d. S  o
if not
) }) K! g. m: E* s9 }7 v; b
. h( d: y$ ]3 |$ R9 ~3 w4 E7 eWeight the 2 time ; b; z: ~7 f/ J* ]5 a% S( {

) A! Y* _8 E# t/ K, Z! k8 bSuppose 1-6> 7-127 \, V' J8 @# ~- W9 w' W/ S

; l8 t, \/ s9 H2 G1-3 vs 4-6
" H( b( C, y8 ]. v; d! F
7 J4 B+ h4 D# c; T: ^3 t" ZThen Weight the Third
( }- i- [) z: v: d3.; p/ o  @" g' x3 O

7 x  T( j3 h' i& v2 w$ r% ~* HSuppose 4-6 > 1-3
9 P8 F, h& i0 w3 A/ E
- R% }6 [  S' A; j* ]( vJust like the first Step
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6 X1 m' I; I9 y8 B( s4 vs 5
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if 4=5 6 is the fake one , s$ X3 B6 W$ @% O9 s6 U
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if 4>5  4 is the fake one - n' ~5 G2 }: U, ^

$ b4 J2 [+ z, A$ S! t( [- vand so on......................

hello1997

分3組4隻波子秤7 k+ t; Z. F+ \( m
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Group A: 1,2,3,4$ v1 M8 t! J* z1 b* U
Group B: 5,6,7,84 W( n3 X. O6 D/ U( s+ A
Group C: 9,10,11,12
) g$ ^% H; [: J: S9 EGroup D: 13
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Round 1
9 ]; T8 m; m* N* o# ]+ r9 g; {Group A vs Group B7 I8 D# L* t2 ~
如A and B一樣, 即較輕一粒在Group C or D
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6 P1 h0 \, S5 O- `/ ~Round 2) _; Z* Z3 m; @! T4 `
再在Group C拆成:4 C, ]9 c9 h* u. Z7 w
Group Ca: 9,104 K0 w  r3 x5 ?
Group Cb: 11,12( b( Z: u* J4 O8 O" d
然後再秤, 如一樣, 即13為較輕一粒.
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3 Z% N  f* e+ O# M; w  d  H6 G( @如不同, 即較輕一組有一粒較輕波子在其中, ! s4 J* w2 M% L% X# T$ ?3 C
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
8 V8 `. O2 o; zRound 1
8 A' ^8 A/ W1 O) D, [5 G/ ?- l- N% M! C1,2,3,4 vs 5,6,7,8 = equal
7 E) L: i4 a5 O$ P5 c1 T8 W1 ^  ?" v# f; x! E! s
Round 2
1 |% B# ?0 e  z9 X' U& o' S! k- u9,10 vs 11,12 = 9,10 < 11,12
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Round 3
* K5 c( ^2 ]0 Q3 q" H* u) x9 vs 10 = 9 > 10- K6 r" m  y) a0 ]1 ^
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The answer is 10.; |! z" P3 [6 i9 l5 J5 [  J. u
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e.g. #2 假設7為較輕的一粒
3 x" ?8 B6 u+ q8 h0 iRound 1+ V* ^6 }' l* f4 Q  A1 T% r+ |( c
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 22 J: @) @+ D/ k
5,6 vs 7,8 = 5,6 > 7,8
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Round 3, t: V0 \. G1 ?
7 vs 8 = 7 < 8
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# Z% V' e& J$ X  Q4 }% zThe answer is 7.
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e.g. #3 假設13為較輕的一粒; b( |$ Z( E3 l8 k! L6 T0 @; A) E
Round 14 J$ E7 f4 C3 F# M2 w8 P
1,2,3,4 vs 5,6,7,8 = equal8 N8 e6 y) O) h% d" Q0 V
/ @+ V; C/ i) W6 A# T; b
Round 2
/ `, J" ?3 m- Y' j0 t9,10 vs 11,12 = equal4 c& C2 e1 L$ P6 n! E1 ]! w" D+ r

: H( u+ y( S" V+ {No Round 35 L5 r6 r# ?+ ?

5 V; F* P4 p7 e; tThe answer is 13.
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唔知我答得正唔正確呢?! - s1 k9 t% c; u+ j! [( _" y

# o7 z9 u7 Q- L3 I' j! z2 B[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:, w6 E8 n$ j+ k* z/ R( m& }; u
1.
& y1 c% K  P+ j, T$ V/ S! _1-6 vs 7-128 Q) U( D) _# ?7 J( W# M: C: }
if 1-6 = 7-12     13 is fake
/ @6 r, [9 p/ ~, N  ]: }( F3 k& M9 W, @% C' Y
if not $ F2 W2 s8 J4 \! [% m/ Y
2 M! [2 P+ v: }
Weight the 2 time 3 N/ ]& _5 J1 T9 e, o+ _1 _) t
6 R' F4 `  y- Z  ?3 a
Suppose 1-6> 7-12! \7 J! T6 |0 o1 A+ ~* A

+ x$ U( |( m. b! M& o0 k6 ^- _1-3 vs 4-6
, H0 p0 F) D8 t; W* z7 Q, p/ J; p" K  C; X
Then Weight the Third6 u( S5 ^5 u0 y+ o
3.. O( Y, ]7 b7 j9 i

/ |. L4 n" |6 e3 c. p) B+ B7 `: hSuppose 4-6 > 1-3
) O# H( G9 e2 [, ?
5 N5 I0 a: @5 p8 }Just like the first Step( g* O$ K# n2 w" N* a
7 G3 @8 a1 I% j6 D
4 vs 5
( e2 L: E% t: {. L+ h! D5 N7 l% r- w$ j$ p
if 4=5 6 is the fake one
0 Y5 ~9 P' O) H& Q3 H  K
( y3 d( i) s# ~  nif 4>5  4 is the fake one ! \* R; t+ r9 c$ ~% Q9 K
and so on......................

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" r% O8 k7 L& o) O問題第二步
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Weight 1:  1-6> 7-12
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  z( M3 @& ^. P5 `" XWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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+ h1 `6 B2 a8 v8 N9 b; F+ `, r你第三步点去搵 7-12 边一粒???
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========================================; f5 u% V& |8 j" _/ e" d

" o" U5 V1 i9 ?2 D  R+ C0 L問題第三步
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Weight 1:  1-6> 7-12
9 c- Q" U( x3 p( B- d# H& |, D6 ]6 \: d3 O7 A" f' G! k/ i) w
Weight 2:  4-6 > 1-3
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+ x* y8 ~; \; a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