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8 X! P+ s2 x8 K, V/ {+ ]) _- c

- L" F& l  c, W) W『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) ?- S- q  L0 V% o! S# b
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: ; ~  H) Z6 b0 I

  u, `% I. \" d! ?8 A1. 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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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:
$ v: s2 b+ U# R  h# K相信e條題目都有吾少人玩...

6 f* O( |7 [* E+ O" F. l我以前畫左個chart去答,
# C4 `: J+ U  H$ J8 i: d等我搵下仲在吾在& p3 S7 P# _) J7 R" A+ p
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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/ Z: {. K- ^# p" @# V2 V- `[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:) U3 d3 `( t1 B4 `8 S. v0 _
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我以前畫左個chart去答,( P* [5 e4 d7 x: s! q1 D
等我搵下...

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* L$ c7 z7 \4 M+ G1 H# D% d+ w& Z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 l# j' {. I5 f5 s, K9 ?唔識隱藏...已經諗到..

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- z6 [7 A. {8 I# D& y$ Psor !!!....e加改左1 }2 d; j6 ]8 P2 w; C

/ P! v6 b9 _- e2. 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% d- f! X. p/ b7 i

* v3 `4 T- I9 z8 J2 F[ 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 t) v! {. ^: V+ S相信e條題目都有吾少人玩...

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2 P+ Y0 v8 S2 P- yPlayPlay, 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:. U6 y  M% ^1 u* l
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" Y6 @1 N% x1 }( E& \! @% k4 ]- hPlayPlay, Let me know later who has the right answer and I will add points accordingly." S% z. B( B% a+ z3 a2 r; o
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Thanks

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1 p$ j( m3 ~  j不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 y" q% \, r  y4 }$ y! R7 y7 `& w/ {7 v1-6 vs 7-12
* v/ ?* @# q4 R' O5 I5 Eif 1-6 = 7-12     13 is fake4 u' ^3 F& }! d6 H' G

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6 |) A5 `% z0 nWeight the 2 time ) N" l: N. D0 c
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Suppose 1-6> 7-12
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1-3 vs 4-6
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9 j- N- U6 i! A/ |9 q4 Z. S! iThen Weight the Third
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  P* N7 H5 r2 P9 r+ i  U6 @) _Suppose 4-6 > 1-3
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8 Y. Z) k) f( n  `) ~# m  o, CJust like the first Step
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4 vs 5 , d* D/ n+ l# H/ o
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 7 W& s. C$ d9 f
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
4 ?: q# A% S& z1 }5 y- e, a& HGroup B: 5,6,7,8+ x' p* k0 K  j$ q9 l, n
Group C: 9,10,11,12
, j; Z/ p# E9 y0 }6 x5 k, ~Group D: 13
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+ G. d  q* Z6 w2 k/ M+ R/ HRound 1
" c& _" D. g& p" o: _Group A vs Group B
* A5 [9 i8 K6 ^5 I* h/ t% I6 t如A and B一樣, 即較輕一粒在Group C or D/ b- M% Z8 A% {' F0 ?# K
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Round 22 g* @$ y* d; I5 @2 A; r
再在Group C拆成:
6 t# P" ?6 a$ b! d- X% \Group Ca: 9,10
/ x2 L: ^, `4 B. uGroup Cb: 11,12% V& L/ M% i7 M; d& e$ s& D* K
然後再秤, 如一樣, 即13為較輕一粒.9 F: p% R1 g% ?2 h6 Y$ y

/ X- h, f# H& T+ W$ x( B如不同, 即較輕一組有一粒較輕波子在其中, $ P1 j; ^8 e% K4 {6 Z6 F
要再秤, Round 3, 之後便知答案.9 N$ L3 ^6 |3 |+ h4 M9 \

- b7 C; b/ x' Y! @  }' e% M5 he.g. #1 假設10為較輕的一粒) v, C4 Q4 C% h7 i. i
Round 18 M. ^9 E9 W7 p/ J
1,2,3,4 vs 5,6,7,8 = equal3 Z/ u/ N. |; B( k

; q5 X5 M; j" C0 {$ V8 M7 b- lRound 24 [; o* D) _9 |" V$ [. e+ j
9,10 vs 11,12 = 9,10 < 11,12# y5 \. @$ o1 e$ j, ~

+ }: V2 A  d8 L( X) ]Round 31 k/ T& ~5 x1 N9 J: }' N
9 vs 10 = 9 > 104 }1 h* ]1 s( ^2 A; S6 p2 \

4 k5 [/ I/ C! L- @2 rThe answer is 10.
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( a$ I( x, R" S, x7 ?1 p/ Te.g. #2 假設7為較輕的一粒! b% l7 p2 B) {6 q9 ~
Round 1
: ~: e, F  D# ~1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 20 W& E3 N' x3 Y; ?
5,6 vs 7,8 = 5,6 > 7,8
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Round 35 A* Z: B  j1 M
7 vs 8 = 7 < 8; y6 @' D9 y: N# P9 @

. ^3 _4 X' g) l& t2 W3 fThe answer is 7.
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e.g. #3 假設13為較輕的一粒
- \; P9 [" ^/ }' E$ WRound 1
+ O4 q9 b+ M9 _6 x8 }9 Z9 t. d1,2,3,4 vs 5,6,7,8 = equal
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Round 2" Z( w) ?7 Y3 w* M5 W
9,10 vs 11,12 = equal1 u" S, s. Q2 @& R# ~

, d- Y7 e2 c0 B$ fNo Round 3
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The answer is 13.
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唔知我答得正唔正確呢?!
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$ H  d9 ?% \- 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. ?& b. d/ r( R$ B; c
if 1-6 = 7-12     13 is fake
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if not + g7 P) E) C% s9 p/ X% q

& j& `. z1 z2 d2 }7 XWeight the 2 time
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' }) f6 O! h, hSuppose 1-6> 7-12
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: d' y3 h( r6 R# h9 f$ X3 }2 f1-3 vs 4-6 2 B1 i9 i4 X9 e4 x" ~" v( e9 i

2 z5 k$ a* G$ \5 uThen Weight the Third' _+ I" A1 c1 e5 O4 ]
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
0 T/ q+ P. P5 x7 [and so on......................

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# V0 U/ K5 F# r" w8 \問題第二步
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Weight 1:  1-6> 7-125 H* B, \, K+ H9 X

, @/ F2 |* V7 Q. v  _Weight 2:  1-3 vs 4-6 , if 1-3 = 4-64 X. Y! e8 Q  Z/ q: Q1 w) ?
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你第三步点去搵 7-12 边一粒???- `( J" l6 G$ l+ R
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問題第三步
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1 r' u& [9 E4 D0 TWeight 1:  1-6> 7-127 v1 F6 b4 ?) v  K! n0 X  t" P

' \6 S5 L. ~" P) GWeight 2:  4-6 > 1-3 ! O- q' Z2 g1 n
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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