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3 I# {) T# y  L* C3 H( `
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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)。- M; P- ~6 {0 t5 L
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: ) `5 Z+ G/ u% _" B. j/ R

/ |( K  K) i# e: J/ l7 k  t& H1. 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" n- |/ Y7 Y; s* O# e: L
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
: p8 `: ~# d$ H, k: V' m' X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,
- S, k+ N+ v5 K- m- C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。# l' G; I( w- {+ u, D
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:& G5 M- j/ ?3 H8 h& M! Q
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我以前畫左個chart去答,8 r6 f: Z, O, b3 J# E
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:
5 k0 i' z: \( T6 L& J4 E唔識隱藏...已經諗到..

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) W; G8 S+ Z" Tsor !!!....e加改左) \6 @; i! j2 ?- D+ ~% t6 p
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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:
1 @" H" ^5 a# |* C3 k) k9 v相信e條題目都有吾少人玩...

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7 A- f$ |, d/ B% kPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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  A7 t! D1 E) T% Q9 G( Y9 CThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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# g$ E6 D# ?& ^PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) }6 J, I; D% ^3 gThanks

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0 @6 m' I2 F) S. h& D不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
, z) }8 t4 [8 H; d9 l1-6 vs 7-12
: x9 f7 H/ P* a7 y( q) W$ Wif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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& ?) Q0 F! n7 w! @( nSuppose 1-6> 7-12
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1-3 vs 4-6
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' A% N' A5 G3 E( y) S6 uThen Weight the Third
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Suppose 4-6 > 1-3
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; l: S7 H+ b6 bJust like the first Step
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4 vs 5 3 r1 {( m4 p" B' a! K) a
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if 4=5 6 is the fake one % g0 h' ~0 W5 ~3 g8 c; L
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if 4>5  4 is the fake one 7 ?$ K" k  P( s) U( I( e

( f6 m9 s; {" W% vand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4: z  X& f4 L% ~8 P; u
Group B: 5,6,7,8' u# \% ]) f; M- D' g
Group C: 9,10,11,12
" G. ]' y% c' Z3 D! i$ DGroup D: 135 f6 V+ J+ M. z7 w& ?
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Round 1
* O( Y; ^! h6 E: cGroup A vs Group B
5 M# q: M3 L* I  ^* q" d如A and B一樣, 即較輕一粒在Group C or D
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Round 2* t: V; i1 c! M& @: B5 V: ]4 R+ a% S
再在Group C拆成:
4 V+ J' c5 j( P" q! vGroup Ca: 9,10
: ]: f; S' C# |5 @+ t! g+ L) h# cGroup Cb: 11,120 g/ z' ?- F. C' X& b
然後再秤, 如一樣, 即13為較輕一粒.: _) |+ h! [1 b* ~1 \3 @
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如不同, 即較輕一組有一粒較輕波子在其中, # C$ J" y5 l' C8 |8 l
要再秤, Round 3, 之後便知答案.
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1 n- a8 `4 f. u# l# ?9 me.g. #1 假設10為較輕的一粒) B! J- D3 r1 T3 r: ~
Round 1) t% _# I; k- V$ ~. h
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
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Round 3) |$ |, j4 |: a# J1 ]
9 vs 10 = 9 > 10
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5 z7 ^) P/ }6 J2 J$ S/ P% hThe answer is 10.
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e.g. #2 假設7為較輕的一粒
+ z; x$ E2 ~4 D, |7 c% r3 zRound 1, q! Y" _2 z1 T$ O6 R5 S$ ~+ Q
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,86 J6 }: p2 l% F1 N4 y8 Z9 ]1 q5 ^: z
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Round 24 C7 r% h- C; C0 Y. u2 r4 l7 c
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
( T; a4 D! y6 e5 C! r7 vs 8 = 7 < 8
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- C0 Z3 m  {) V& r  x- SThe answer is 7.
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8 a6 ^& e( a0 A8 J- Ye.g. #3 假設13為較輕的一粒" |' d, U8 l4 ]" d' c) L, l+ ^
Round 1
( R8 B1 W; B5 W6 Y9 Q+ f1,2,3,4 vs 5,6,7,8 = equal  @! {- ?% K+ x( E$ H& R! L7 P2 f
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Round 2* D' H6 ]0 ~5 ~8 E: n" K5 z
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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8 p6 \1 d9 B" ^' B唔知我答得正唔正確呢?! 2 g4 S+ M) y, k3 }/ f$ }0 a

3 _- E  n6 |/ L[ 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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2 c1 x1 ?1 M4 S  P' y8 W: A$ }1-6 vs 7-12
3 M- ~1 [" D7 o' k/ {/ K/ Yif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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  i) _; O# R, i* fSuppose 1-6> 7-12( ]  E& L8 H+ w; x7 g" E

/ ~' A7 l" j0 Z4 I1-3 vs 4-6
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. }$ i$ y" n" z' C4 D7 PThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step6 i% Z; @# O5 W' |8 J. [' N
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4 vs 5 & d) |- v) {% E7 @+ e8 l
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if 4=5 6 is the fake one
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# ]# D  ~8 `' o# jif 4>5  4 is the fake one + X2 C2 c; n' G1 }# J$ h6 R
and so on......................

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( U2 l  N* i+ d" q問題第二步
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Weight 1:  1-6> 7-12, f: }  V! D1 Z! w$ z5 n- H% o

* x# z, H' T) o/ [Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???% t, E; W. N1 s, D  [
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& y. j" G6 c' K4 v- K* k3 c- g問題第三步
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Weight 1:  1-6> 7-12
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: b! K  F' @0 J6 L3 V5 WWeight 2:  4-6 > 1-3 " @' b: P9 j) O1 M5 z' E' v, x
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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