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/ ^& Z* L7 J% ]2 \$ M8 F

$ q% w8 l% J  x" ?$ [『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' A3 X$ q% c. G7 I
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？』, \5 I: Y/ e% ~$ ]. _& K

1 d- y4 {5 h+ ^: Y% n注意:
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, K) c; u1 A, x3 Q( n3 b" 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1 I3 T4 h( d4 i4 {- @
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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
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. @8 C$ a5 `- q% }1 |$ Z[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:2 m" B( [3 K) O5 L$ V
相信e條題目都有吾少人玩...

8 e+ s* l, {2 L我以前畫左個chart去答,
, e. K7 s* h8 N+ Q$ }3 [) e9 z: N等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
8 L1 p. K5 K5 B8 Z! E1 U& q13.........
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: |/ d0 }2 b/ D: @% @0 y0 y[ 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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我以前畫左個chart去答," X7 c2 _- B# r8 M0 F
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:7 X' U$ P8 @( A
唔識隱藏...已經諗到..

4 A* \5 o8 |1 O) B* e4 V9 i8 s7 L, X. V7 z5 Q2 Z* R. q
sor !!!....e加改左$ j' A3 j5 u$ K  H" @, V
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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+ S  u# p5 y8 J6 w& Y
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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:1 V$ U1 T% c4 H% v& k$ O% q) Q4 F
相信e條題目都有吾少人玩...

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9 P" u; P: Y' z. f3 [, d# e) J( PPlayPlay, 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:3 G" N3 [. x6 A% k& A

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; @7 c. T9 b$ I- r7 K& ~; J9 s. pPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) y' l( S2 F9 ~1 g3 lThanks

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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.
) g* F( C- z! J6 F  C1-6 vs 7-12
1 r( ~0 w- e- {5 {# c- t' A1 {9 `if 1-6 = 7-12     13 is fake0 |: h! D5 j. R* w
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if not . }; X: P$ r( T  I) g

; a" k$ _# z& c4 V, X: {' [8 CWeight the 2 time
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/ |: L$ n: Z* E- _: F% |0 T; nSuppose 1-6> 7-12( l+ H. t  Q0 R8 z3 I' M* V( W

1 b0 a: B" O5 `$ L1-3 vs 4-6
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Then Weight the Third( }3 U; A2 N! j( B$ {5 I
3.
1 _/ Y- s& ~2 Q6 h6 F
: h# S8 A* I5 t$ qSuppose 4-6 > 1-3. M6 X# T! U+ d- H; L- [& a0 n
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Just like the first Step9 I8 Q3 Y6 h. i: R( f, J

- b. e1 g, e% S: W2 ?( x, R; \4 a4 vs 5 9 j8 S/ E6 e' O" Y- n1 u

5 U5 n  k0 h  ~7 O$ J( s( xif 4=5 6 is the fake one
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if 4>5  4 is the fake one
2 ~2 u2 o5 e. O0 O' D
7 u3 [: K& O% Aand so on......................

hello1997

分3組4隻波子秤; P! I- W+ w* B; T2 S- G

5 C2 f% p  M/ `( ^9 L8 H5 S+ r5 OGroup A: 1,2,3,4) e5 U. O) k$ h3 S
Group B: 5,6,7,8
* [$ ~5 Y5 S) `" W  G/ lGroup C: 9,10,11,12$ A3 {! l+ p4 w
Group D: 131 J  x4 K, Y/ F2 Q% H3 C' z  q. Y! E
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Round 1
; d0 _5 v0 t" ?4 `' ]Group A vs Group B& s1 _/ k) U, _8 x
如A and B一樣, 即較輕一粒在Group C or D- V( r! M+ O; r# N2 s
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Round 2) l/ l; U* ]) B- F4 l5 m- H
再在Group C拆成:! n( N) q3 U3 }4 i; n
Group Ca: 9,101 U% t* I% V" P. [+ [( _
Group Cb: 11,12
( P; m' C  b0 S( U( W* T7 r然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
9 Q% w! p9 J2 {/ o) G要再秤, Round 3, 之後便知答案.
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' l' c. @- k; U: w2 S" Q. Ue.g. #1 假設10為較輕的一粒
4 w! z( A0 x  |: n/ sRound 14 l  X' I" e! v3 j7 L. D, H
1,2,3,4 vs 5,6,7,8 = equal
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$ q  S. X- C* e4 T) O+ o" PRound 2
8 X7 y) b+ v+ |3 u% S9,10 vs 11,12 = 9,10 < 11,121 w  W4 s. ^' k
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Round 3
* z- V" W& P! P* r* M4 `9 vs 10 = 9 > 10" t  C3 f' Y& ]$ u! M& e
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The answer is 10.
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e.g. #2 假設7為較輕的一粒% \: \2 F4 m9 f
Round 19 m' p! H/ K  D( p7 d
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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; R( a1 q2 a7 e( C% y* |Round 2
$ H7 c3 ~" `) [% M6 _5,6 vs 7,8 = 5,6 > 7,81 @( Q5 p. s) i' P$ `% R

7 E4 \& `, Y1 S6 U# ?Round 3' f) z4 Z2 t9 g
7 vs 8 = 7 < 8
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The answer is 7.! k. \& L, {/ f2 t: a
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e.g. #3 假設13為較輕的一粒
( J$ s3 U$ y# h0 _5 J# r6 ZRound 11 ^8 {/ d: X) f# n4 [% i4 A
1,2,3,4 vs 5,6,7,8 = equal- O. j2 F- z( |
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Round 2( w4 F( ]- y" t) W, i
9,10 vs 11,12 = equal) ?8 P1 F% e+ l
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No Round 3& X: D& U+ @. N3 ~* _/ u

/ a' k  ^2 [  ~The answer is 13.
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7 s/ Z# H" `( C& T- |% B3 z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:
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! f- F$ f2 Y( A' `  ?1-6 vs 7-12
3 R8 `/ l% Q: A5 d/ o; p- I) Gif 1-6 = 7-12     13 is fake
7 B+ u: f' f# {" ^( s. U" N: o* h1 X  ]" N& B, ~0 r
if not . s( ]+ @3 }& }+ [& ]3 Z
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Weight the 2 time
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% V( \: X; I2 l+ b) X* M) G& cSuppose 1-6> 7-125 p" K3 V7 {! [! N4 u2 f& Y" a9 @

! r4 a$ A3 P) V& i4 i1-3 vs 4-6
( u. B; Z. i; W9 x  P/ x- b) s/ j7 Y/ t1 S+ w' M3 _2 ]# ^
Then Weight the Third
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: r9 V- N; c/ [. f
Suppose 4-6 > 1-3% T: `9 ^1 k0 o7 S* f+ c

3 p. }7 h. q$ T  @  W! VJust like the first Step
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4 vs 5
5 }/ c5 L: W' T& m9 h! K. K
' x" ?" e- j% Vif 4=5 6 is the fake one
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if 4>5  4 is the fake one 1 Z# v% T' J9 j, k2 x% ?$ V
and so on......................

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6 C% D5 N. B' M, R7 g問題第二步
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5 c7 h1 w4 q8 L$ f5 tWeight 1:  1-6> 7-12# A0 p$ _9 N. B+ i( k. i
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6" @  [- n% |1 @8 Y( d6 s! ?! x* U3 y4 {
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你第三步点去搵 7-12 边一粒???! H2 _. l  H8 H; Z
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========================================
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問題第三步
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7 v# |0 j  c$ X) I- [, k: u, zWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 / I0 j% c% U0 x7 c

+ V( J$ [! V% c3 T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