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5 x0 t* `' `7 e

; v) i9 o+ X! X5 w1 v/ o『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)。
0 i+ @3 u9 g% R5 V. S/ c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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注意:
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! a/ T2 G9 V- [; _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
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8 t! _. }9 E" ~6 g2. 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:% ]  j  \2 d* C! P2 E' X
相信e條題目都有吾少人玩...

3 I0 A  a) h- O8 a我以前畫左個chart去答,# P8 s! n6 i2 R( @- _
等我搵下仲在吾在
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: a; ^' r/ T5 ], ]當日用左37分鐘答１２粒波子，差７分鐘才合格。& q% t  I1 n# n6 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:
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0 ?: F; W( G) |* z6 V我以前畫左個chart去答,
# g1 F) Q7 k3 ?: I  x5 V. v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:, O6 H9 G! y& s& a4 R
唔識隱藏...已經諗到..

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* f: p, J' z; B. u2 L8 f- rsor !!!....e加改左7 o4 e6 G* T7 i% Z/ h( u
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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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* G$ t0 A5 _( f3 F4 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:
2 \6 A8 `* {1 r5 J6 N; X1 S: d1 C* M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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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ y$ |- F% o; [; j( \& x
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: m0 a/ o" P  d( FPlayPlay, Let me know later who has the right answer and I will add points accordingly.% h6 [" c/ n4 W/ T' D

+ |+ y1 m9 T; @5 j& }% g$ D8 }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.  C) q- t& w/ R  X  U1 R# ?
1-6 vs 7-12
/ I( d4 b$ ?4 w3 o) Pif 1-6 = 7-12     13 is fake
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Weight the 2 time / ?4 H5 i3 [% f% ~" S

8 A7 @" {  R: W8 n# {, rSuppose 1-6> 7-12
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! }+ |9 y4 ~' I/ g. G1-3 vs 4-6 + \+ _/ X# `$ s' e( K. u( C

  L6 G+ H& O* p/ z# o* zThen Weight the Third9 h/ l1 M5 J! A" p0 H3 S
3.
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" a+ U8 H% {) t* f6 o) y& ZSuppose 4-6 > 1-3
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Just like the first Step/ u3 n% b/ H% _1 @7 \* r

% K& U* B2 S. U  v6 ]3 j4 vs 5 $ T5 I7 f2 c& `2 J! C
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one , X! `* @! {' b! H

: d3 N! b9 j& K3 o9 n6 v0 J$ vand so on......................

hello1997

分3組4隻波子秤1 f. U9 v2 R' V+ Q) ?

. p) b7 a7 ~5 ~- l9 xGroup A: 1,2,3,41 y& {8 x0 G& C* ^% f1 g9 o2 k
Group B: 5,6,7,8
* ~9 v2 c) f% c; b4 C) G4 jGroup C: 9,10,11,126 p; D4 {" [; n0 Z  z' e3 o
Group D: 13
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% m& C" L- t+ ]/ Y) FRound 1
9 G) I( Q& \- o) F0 `Group A vs Group B  P* U7 [$ _$ m2 m% a% \0 f, ]1 {
如A and B一樣, 即較輕一粒在Group C or D! X$ Y* g- _# t1 C9 n. O6 t. S! }

1 T5 E$ A" C# U- V2 w: i: G) JRound 2
3 J" X5 v$ y6 q) P4 Z- Y. ^再在Group C拆成:
! N8 K( y& J' h/ e2 EGroup Ca: 9,10
( Q- y! I$ @# _7 [/ v/ l# bGroup Cb: 11,12
6 Y* K4 F* Y% y( g然後再秤, 如一樣, 即13為較輕一粒.1 z. W" T, W+ b( }
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如不同, 即較輕一組有一粒較輕波子在其中,
1 l) N' K; q( F/ j: J要再秤, Round 3, 之後便知答案.
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/ E; K. o& f$ D- c. M* {e.g. #1 假設10為較輕的一粒
6 M3 x" g. @; s" mRound 1
+ \* _1 B( r2 \" f" c: l/ f2 ]1,2,3,4 vs 5,6,7,8 = equal
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/ p4 S% R( U3 X2 `. i# [- sRound 2
) l3 M1 ?& w- O9,10 vs 11,12 = 9,10 < 11,12
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Round 3% G# c2 Z" H! D* u, [2 j/ r0 k
9 vs 10 = 9 > 105 m' S; Z" L8 R

: m  ?8 k" |( ^% Q7 `! xThe answer is 10.& I- W- D. U* R/ C: ?* y" ~
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ h9 w" h  Q5 n" HRound 2
* f9 f) y- B6 \. W  c4 w5,6 vs 7,8 = 5,6 > 7,8
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2 e$ t. n" p% W* Z/ `# XRound 3
" ?4 `! h& p9 c# q; h7 vs 8 = 7 < 8
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$ K: x& C. C7 c# d- eThe answer is 7.
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( o/ r7 C& ^" @, N$ `  f1 Ee.g. #3 假設13為較輕的一粒
" W) e7 C* @; `, R, g6 GRound 1
4 N1 R2 x. M- q$ S1 B1,2,3,4 vs 5,6,7,8 = equal
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0 l& f/ l0 Z: R8 jRound 2
* f4 e1 t2 N# U& }- ?9,10 vs 11,12 = equal: _" P3 t3 q2 y% P! |5 i
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No Round 3
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The answer is 13.8 {$ b7 s. K+ f' }  K
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唔知我答得正唔正確呢?!
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* F. a- g' m6 f: B6 q3 K[ 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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1-6 vs 7-12, c/ {( ]! J% ]2 S5 A  i8 J
if 1-6 = 7-12     13 is fake' C0 j0 }. m5 g: @  {. `' ]! T8 T, Z

" \9 ?* j$ o& E( M1 J* g2 q( Lif not
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, K4 r: r9 P; Z2 G9 L2 e: Z# JWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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2 V% O; P2 s3 p+ `Then Weight the Third
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Suppose 4-6 > 1-32 ?; a$ E3 ^3 ^1 I; l, y) C
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Just like the first Step
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if 4=5 6 is the fake one : R( `* [5 t7 _0 w+ z( W* b7 ^

8 r$ ~# e9 b8 [; ~1 eif 4>5  4 is the fake one
2 X; f8 g) w! H  p5 q, eand so on......................

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問題第二步
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Weight 1:  1-6> 7-12  X6 A9 S8 ?. X: `
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6+ Z" B# Q( G) s1 p9 `
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你第三步点去搵 7-12 边一粒???1 `: e' \( W4 i6 [- l) ]4 d  ]6 H

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1 X% J% ^2 D0 f1 Y5 J, m7 w; v問題第三步
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+ Q9 _- Z/ q" E% N  N& DWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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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