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0 z9 u4 Z8 u* ^  L8 k
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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)。  L+ m: e/ B% [# c0 ]+ j
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？』6 }6 |2 e3 a7 e: L7 d
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注意:   J3 ]9 f: j$ l" O
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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
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6 g! l. t  w+ ]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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# s, b9 K0 [% k, R# U& Q& X[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:  S( r# c: P2 }* @* q8 X4 V- S
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,& x# u& G: [! j3 Y1 d
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。1 V5 j* Z2 ]9 K+ C' Z5 d" v
13.........
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* v" R4 u( h, y0 |4 ~% x0 C[ 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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# Q. G( m' z2 N! v8 _我以前畫左個chart去答,
' ^& m; y; @) M: U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:
- p. C" W2 |7 q2 X( Z" _" j唔識隱藏...已經諗到..

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sor !!!....e加改左  w2 W. C$ b- w! n4 G6 ]1 c( Y( h% a

$ [) C/ V7 J2 b8 Z" E' _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* w% Y9 o- Z9 S0 y- C

, H+ V: [. H9 F, _7 c! p: {[ 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 r7 d( |0 Y1 K; a# C  {
相信e條題目都有吾少人玩...

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9 j9 h! v) O2 F& XPlayPlay, Let me know later who has the right answer and I will add points accordingly.* ~0 D7 P  u( g7 {' L, ]9 X, A" O' n
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:( K2 n1 L* @1 D, V
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( T3 F8 \5 w* O  s( hPlayPlay, Let me know later who has the right answer and I will add points accordingly.' v/ V* p! c5 c' E! {! X

! K8 {: z. [# V' NThanks

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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

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1-6 vs 7-122 a* o; H. _( Q$ V! J0 v
if 1-6 = 7-12     13 is fake' k, T' E$ S/ T. ^% b( W9 {3 y$ @
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if not
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! D5 ~$ H* I6 R, ^1 {% f. w. |8 l5 |Weight the 2 time
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3 c/ s. v" J* _( |' D. e" \: c  SSuppose 1-6> 7-12' F, U. v! |) k: x  k6 d1 `. B

0 N" O6 }9 V% y1-3 vs 4-6 $ M& W% Y" s* E% l6 T( A0 @+ C

: M4 a3 v/ c$ ?0 s/ JThen Weight the Third9 Z' S/ F9 [$ P3 H& K; f' K
3.
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Suppose 4-6 > 1-3( u8 g* D! R" U, a
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Just like the first Step5 I. _! m1 \3 g
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4 vs 5 ' `; x3 U+ W8 T% y( [$ h" ]

( d" |. u2 e& p8 Y3 x  rif 4=5 6 is the fake one 6 K0 e* U+ u+ S" {9 O, L. B. d" k
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if 4>5  4 is the fake one - R4 Q" t. |8 t2 p

& c% \- q1 F$ O( |2 Tand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4& U- `$ W6 \, I# p
Group B: 5,6,7,8, x- L$ Q. a2 g$ d3 i% V2 G, U2 D
Group C: 9,10,11,12
# l1 k1 E/ t, f3 uGroup D: 13
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Round 1
; N0 a# ?8 q: {& F9 m  _+ VGroup A vs Group B8 k# Y9 b" L' ]/ N
如A and B一樣, 即較輕一粒在Group C or D2 h0 i* r# `: |! _: ^8 Z

+ n9 e. G( u- v8 D; rRound 23 i1 X+ V  Y% C
再在Group C拆成:
& ]; q( I; ?% @3 jGroup Ca: 9,10. X: z& e: `2 ?* Y+ v4 N7 O' u
Group Cb: 11,12; Z) S( i8 P4 d& J
然後再秤, 如一樣, 即13為較輕一粒.# y% F! ^* l' p) ?! i7 j
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如不同, 即較輕一組有一粒較輕波子在其中,
5 m0 Z; T2 W: X: P+ n要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒8 t1 `0 {8 G4 u8 L9 D
Round 1
  ]$ W  {, X- j2 V9 i  }6 R8 N1,2,3,4 vs 5,6,7,8 = equal) F$ U6 N1 V% j  a. U. J
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Round 2
" j" ?) T6 ?$ @/ s0 X2 w9,10 vs 11,12 = 9,10 < 11,12
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Round 3/ J9 u# n; q" U+ v  h
9 vs 10 = 9 > 10  x9 n' i1 ~+ N) l

0 \. U8 [2 C( O7 |The answer is 10.- m4 `/ _9 |$ Z- j) g' o" i

9 _! l8 E7 t$ Y2 A6 ?1 F% ]e.g. #2 假設7為較輕的一粒
. v- h7 T  P8 b# a% wRound 19 e# a! {+ A# k! p" j
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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$ c0 D3 I9 Q7 E* P7 o: Y+ h8 hRound 2
9 e9 W" I' B* Y5,6 vs 7,8 = 5,6 > 7,8
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+ `1 a( W) y' @$ f. K% O! u! X) ^Round 36 Y' ~4 C+ ~/ S, O
7 vs 8 = 7 < 8
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+ _5 k. o7 F+ V3 I# t0 t, JThe answer is 7.
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e.g. #3 假設13為較輕的一粒; g: Q. U* F, R
Round 1
: s* l  q; R3 t1,2,3,4 vs 5,6,7,8 = equal+ g' ~8 m2 E/ }0 w

, u4 t/ D; U! c$ S, t$ N$ E% u! jRound 2' {9 c" g& |7 f
9,10 vs 11,12 = equal
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' {: z6 K" U5 jNo Round 3, A1 a- C2 t3 S' b9 j; [, W: E
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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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[ 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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5 ?* L% P- N, G) p0 c# y1-6 vs 7-127 u! V0 u2 c/ L/ H$ t( r  k
if 1-6 = 7-12     13 is fake
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7 ~" ~) G2 G' J/ r. r2 G" kWeight the 2 time 8 e8 D) y6 C5 i2 f8 k. h' n
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Suppose 1-6> 7-12) L5 {% Q) W0 I8 m  I" h: l$ X) S
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1-3 vs 4-6
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Then Weight the Third, T$ K: F8 L2 R/ w
3.
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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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  x3 f$ k! `2 V; [9 }' _" H3 tif 4=5 6 is the fake one
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if 4>5  4 is the fake one % n: @3 h( ^7 E5 a
and so on......................

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問題第二步
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Weight 1:  1-6> 7-125 P6 h4 p" u+ n* g6 {

/ e0 w' j5 F7 m3 ]# UWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ ]" }  G; n7 q$ M
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你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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: f  }8 X6 f$ e% ]* g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