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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『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$ ]( U! x7 [( M
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？』8 c* D- l, L2 U. x- G4 A4 K" r
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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5 z9 l; K1 f& N' ^/ ]& x! Q! c8 R
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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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; r" s0 M* o; k) G, {[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
3 J' A6 B1 b% b+ y1 a; L0 u- d0 I相信e條題目都有吾少人玩...

+ X1 o- W7 m! b我以前畫左個chart去答,
5 Z& ^3 M  C: e1 w% n% `& F+ ]" L等我搵下仲在吾在) ?' F3 x* W* Q0 K& P! P' o

/ m4 l" O' E/ n1 _7 F當日用左37分鐘答１２粒波子，差７分鐘才合格。; A0 Q2 F2 \) V4 g, E+ ?7 o) l
13.........
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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:; U! G4 I. ~8 [& n; y$ j. Z! Q
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我以前畫左個chart去答,; j4 w; ~# x* m6 V5 J/ ?
等我搵下...

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: |6 g' b2 U/ E1 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:" b& Z/ [8 ]  H) O+ A% r
唔識隱藏...已經諗到..

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sor !!!....e加改左
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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1 b2 `5 ]# O* C0 E6 G$ k- d

+ V, Q- _" D+ Q1 r[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:# r3 d, r. [4 }) W5 X# r, e% ?0 W! g: U. ~
相信e條題目都有吾少人玩...

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" m) t& w1 ?7 B) G/ E% LPlayPlay, Let me know later who has the right answer and I will add points accordingly.0 y8 F  e$ w5 X% c
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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8 z! {' ~% p& F* @+ W. O! nPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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.
& l; z, q, }$ x9 N) z9 r1-6 vs 7-121 _, ]6 C/ s( a9 K- {
if 1-6 = 7-12     13 is fake! F3 Q; E* a! U; Z& N, u5 f. ~: t% K

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Weight the 2 time 9 g& {$ k$ [$ X- \
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Suppose 1-6> 7-12  N- f" |8 o. H
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1-3 vs 4-6 & D; O  s1 p/ m& m( \

1 w, j+ B9 ?$ D: bThen Weight the Third
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( g0 ]/ _) B9 l  }* Q) MSuppose 4-6 > 1-3
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8 t4 N( C0 ~0 f3 pJust like the first Step/ Q; ], N. o& D' G  P

  c. S4 K$ B. {) ?4 vs 5
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& F% t8 L4 i# k$ E* K' \' mif 4=5 6 is the fake one 6 G  l" e, }1 r2 ]: a* z6 s

; V7 a4 t3 s( uif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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1 o, [( I2 h9 ^/ S$ Y$ b) EGroup A: 1,2,3,4' N- j8 k& y6 N
Group B: 5,6,7,8
) r2 L! X) ~& l2 ^Group C: 9,10,11,12
0 E# F6 L# ]# @& n% sGroup D: 13$ e5 _# `9 S8 q' h
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Round 1
" U+ c* c/ e- R* Z  A- g  nGroup A vs Group B* i* D  l4 ?# J2 [, T) Z
如A and B一樣, 即較輕一粒在Group C or D
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Round 2/ Q* x) r% @6 ?, R2 [2 c4 V
再在Group C拆成:
& _+ O' e2 G+ _* ?Group Ca: 9,10: u, H( f+ _: D; Z% s( {6 P. h
Group Cb: 11,12" z  d, g$ U( M6 n; ?8 t
然後再秤, 如一樣, 即13為較輕一粒.5 r! b% H  ~! ]  b4 l

% i% w' u- P1 H" M( @1 W, @  d如不同, 即較輕一組有一粒較輕波子在其中, - ^! O6 z) t; b+ h0 ^3 ?7 A
要再秤, Round 3, 之後便知答案.
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( ^* ]" k' E$ A: D$ I6 `e.g. #1 假設10為較輕的一粒6 B$ K% |1 ^7 b& _% f6 F" L
Round 1; n7 \) Y! z! P6 D+ O# O5 r1 b
1,2,3,4 vs 5,6,7,8 = equal
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0 c/ H5 E; H7 A: G8 mRound 2
' p* S+ H; Y' k! D3 `: x5 p9,10 vs 11,12 = 9,10 < 11,12& f/ _9 ~  e. E: U% X1 k
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Round 3$ Q, t: n- V( e- C" I
9 vs 10 = 9 > 10
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The answer is 10.
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; {- q  T/ p' F) n! q3 F% q) Ee.g. #2 假設7為較輕的一粒
1 `0 \0 j. M6 r+ Y6 u  qRound 1) `6 X3 J+ K3 Z
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 }- @# s+ D% C" {$ z1 k" v. Q
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Round 2
* f% z; c; x$ I3 Q1 F2 X! U: ~5,6 vs 7,8 = 5,6 > 7,8
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Round 3% h- @" c- U' `5 U3 |
7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒9 c, a# w% g, A- c! w
Round 1
/ Y. e. a* z  N# `( T5 j! u1,2,3,4 vs 5,6,7,8 = equal
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Round 23 d! O) Y5 Z% e5 }( w
9,10 vs 11,12 = equal
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7 j* x7 u* j1 q. E- G+ ^No Round 3& g- j6 w0 {* I6 z. }' o0 l9 c

2 t; G) b3 G1 c2 _7 hThe answer is 13.
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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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; p7 A* Z) F6 {0 K# R; W& J1-6 vs 7-12  [& A) n3 c# C$ w/ {
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time % \5 u3 r9 \: S' @
1 S3 }. w5 w* `
Suppose 1-6> 7-12
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1-3 vs 4-6 * g) I! |6 R8 d3 g

# `) W) C# S7 v4 {9 `Then Weight the Third
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Suppose 4-6 > 1-3  B% a6 M7 a$ Y+ W/ R( L
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Just like the first Step. S9 a+ A+ F& u3 d3 V

7 [& G6 A) C2 i4 vs 5
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) |* J$ f! P( h& `+ d9 T$ Uif 4=5 6 is the fake one - w- x6 u, t, F
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if 4>5  4 is the fake one
9 k' ]& P  ~: @- K3 l6 I+ {and so on......................

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$ y* g8 B, V3 _9 x! C' j問題第二步
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- Y( g' D, Y% b4 g0 RWeight 1:  1-6> 7-12
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2 _0 q/ `  e. |1 c; j/ R) n% p! mWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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6 I6 \7 D' M, P7 \3 J+ a* v你第三步点去搵 7-12 边一粒???9 w& y$ a) l* N9 \9 g5 W
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========================================
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問題第三步
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; _! P) {2 `, bWeight 1:  1-6> 7-12# F: W) t, M) w9 h5 M, ~" W4 J+ u

- l& [  I+ P( m. WWeight 2:  4-6 > 1-3   e* {& T! Q, i# V, G& J8 T2 e
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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