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1 I. J+ `$ P( \7 |. E
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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)。
3 Y$ p$ |' C( Z, H, U& L+ V  x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？』
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- O" Q6 L, H6 _: u* C% J" ?) D0 y+ ]注意:
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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 z$ i- |+ w; l- X. ^
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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) m0 [) \( C' H2 V$ w; p

% K; J6 u6 R- W, c, i[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
, f; C" U) [! H2 ~" P1 _8 r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,; ^7 A; Q; ]5 E8 X1 q
等我搵下仲在吾在8 N( s5 }4 G* ]. y6 z' ~. t

+ Q) _3 Y6 f" y當日用左37分鐘答１２粒波子，差７分鐘才合格。$ Y1 `/ w# z" a0 x
13.........
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1 F; `; m2 n+ [" j, F[ 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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: h1 N8 E/ @# n$ \& q我以前畫左個chart去答,
. G/ q  q2 G% E等我搵下...

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. b# n& U  _: K. l( ^. I) {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:
3 Z) ^# {  O* F# j  q5 \& V/ i唔識隱藏...已經諗到..

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sor !!!....e加改左$ [: ~1 s8 c3 L  a% \' J5 i
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
- M2 C! W$ f/ x; `0 A) A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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: f; p8 O) Y- h* v  {+ U* CThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' {! n$ T( W" \+ w2 D: S

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.1 h2 f5 r) |  w! Y0 t

1 R& s9 Q  o8 {1 ]" i8 QThanks

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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.
, t0 ~7 v* h; y% p. U1-6 vs 7-12( F  k  E/ c: {$ H, N/ {% Z2 H/ Y. y
if 1-6 = 7-12     13 is fake5 t/ N1 J% D: \* Q, f

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Weight the 2 time
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) q  K: z( F8 j$ V; H9 J# v0 m# bSuppose 1-6> 7-12* v9 d4 H: n( f
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1-3 vs 4-6 9 Q- l) d0 P5 Q; u/ S, S0 E, U# K
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Then Weight the Third
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Suppose 4-6 > 1-3' c: S; N1 B( B9 b& d  M

( _$ }# C9 A( ?- lJust like the first Step2 h; U* `" J- T' I+ o% ?( {' w" x" e4 F
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4 vs 5 3 i* |) G4 J/ q- \$ b+ \; t
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if 4=5 6 is the fake one
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0 y; [6 _0 ^" d1 N, n- `if 4>5  4 is the fake one
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* K0 j/ P4 q7 E- ?" P  U8 Band so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
# r& `! N# Q9 b6 e8 V& _Group B: 5,6,7,8
% a1 @$ V0 U$ e) MGroup C: 9,10,11,12/ a0 }/ Z9 g* F: U
Group D: 13
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& ^) Y* B- _2 j% l) IRound 1
6 |; ~  X( K9 C: t% _- R* oGroup A vs Group B
5 b) Q) d& ?# z9 v如A and B一樣, 即較輕一粒在Group C or D
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Round 2
$ v( Y( t- {: Y. w( A. J# ?8 O再在Group C拆成:+ f1 V( ~- f) j( t6 u! q
Group Ca: 9,10
2 w. p) O: h* k, xGroup Cb: 11,12
* \$ J) j% E0 m0 A3 B8 w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,
  z- a0 Z* a# H5 C8 z# N3 a要再秤, Round 3, 之後便知答案.3 y; J% R9 E& [1 L. h! `
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e.g. #1 假設10為較輕的一粒" t0 K* V, J1 _. y8 q( m, a' [
Round 1
2 h5 n* W) T: W* m1,2,3,4 vs 5,6,7,8 = equal+ p% V& \- D- I2 z" Z

$ X& A, s+ V- U6 }Round 2. J6 t1 K+ u  f1 |- k% g
9,10 vs 11,12 = 9,10 < 11,12. `2 K5 e% M3 H2 t2 S: n/ L

) L& v) d5 a/ ^$ }( Y+ ^Round 33 h* y1 G$ P. j  x5 @  n) J  V3 r
9 vs 10 = 9 > 10
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/ k3 T/ B) A0 p0 ^& b8 T6 F4 `The answer is 10.$ ]. X0 ?7 \. M5 G/ J2 a) Y# r4 W
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e.g. #2 假設7為較輕的一粒3 {$ ^9 e) D. ?% B1 }  [. e# {
Round 1
  o% S3 h  T! }8 b1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,87 V7 e& O$ ?/ b

9 v* l0 F, a: \' S7 c8 b- XRound 22 M( z( n) R! t1 |& e* o6 e" v8 ?
5,6 vs 7,8 = 5,6 > 7,8/ _/ N; D' x8 ]  c, p* m/ Q
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Round 3, a& W! T2 {- t3 Y! @1 g, `8 h; @
7 vs 8 = 7 < 8
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The answer is 7.
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+ F2 Y4 @4 S( L- W" B0 Je.g. #3 假設13為較輕的一粒
! d; D% C! `; A1 M1 Q  b2 dRound 1
6 F5 J' R) k# s  D! C! b2 Q1,2,3,4 vs 5,6,7,8 = equal$ u( P7 z; ~# k
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Round 2
4 P  _) x$ j5 b, F$ {' X9,10 vs 11,12 = equal
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& H& q5 t+ Q% I2 d6 }( SNo Round 3  V) k8 ?* o3 d7 w, G
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The answer is 13.
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) P# a% O% I4 H' H2 v+ \唔知我答得正唔正確呢?! - ]* Y& N$ A/ z! ?9 {
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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:: p) I" ~* n. u. ?! j$ S
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1-6 vs 7-12( X4 d* f% y4 m) X: h# L
if 1-6 = 7-12     13 is fake  l/ Y0 d8 }7 ^2 w

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' I3 V5 h$ v4 ~. i, u' ~Weight the 2 time 8 {  g; r4 U1 ~  v6 y

$ }1 K" s0 V1 L" A  y$ {# }& l: dSuppose 1-6> 7-12& K: Y$ S6 S: M2 m  X! I

' a5 {9 d( Q- z; s( x1-3 vs 4-6 1 o, N, q, B0 l7 x% j# d  z

  J# k) P- l: q% k. Y: QThen Weight the Third% y  ?, a1 `6 i6 b9 f; y
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: ~+ Y/ l( |- h! {Suppose 4-6 > 1-32 V$ A- p  V2 U

" o2 `: }, E( ?$ e6 w' GJust like the first Step
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if 4=5 6 is the fake one 3 g4 Y7 L* p- @- d8 O; C1 y2 V/ ~

( M$ U2 Q# l: W5 tif 4>5  4 is the fake one 6 {" J( J; s- {/ c; @
and so on......................

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9 g" }, c6 P* H7 x0 g7 ]問題第二步8 e" k+ b. s% V% _/ I9 h  ?+ a. m
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Weight 1:  1-6> 7-121 Q9 @! B3 R, i7 X. t

2 P# E& ?$ M/ H# nWeight 2:  1-3 vs 4-6 , if 1-3 = 4-62 d/ j: s8 N* A" f8 @8 e! h& X

3 {3 ?  j7 B8 g; x" U- k你第三步点去搵 7-12 边一粒???8 `, q" j2 `, L8 L
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問題第三步' R7 S/ @. Q* A2 x$ U
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Weight 1:  1-6> 7-12
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8 W8 Z9 b: G8 G& @! M+ h: t; s- NWeight 2:  4-6 > 1-3
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2 f( c1 ^, V  w2 C* D* f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