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)。: j" \6 Q- V1 I, E0 m% I3 y- U% ^
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？』! `* ]$ v  P/ a5 n+ [+ r
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注意: : h9 g6 z8 m7 K( g5 J
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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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2 d5 L. T$ ?7 B2 J4 b/ e& b2 O; u2. 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- M# n+ B; M& j) `# w8 l& ~' O& I

( }" c" _) }3 H& i0 w8 D0 M[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:$ \/ A/ O6 U4 \
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,, t8 w  a2 n* m& G* j  z
等我搵下仲在吾在
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3 M' }8 o) O* C# |, t& n# p( Z( j當日用左37分鐘答１２粒波子，差７分鐘才合格。$ w* H! m* ~' Z# g# E3 \2 G
13.......... Y- b0 d" o  r

, L4 t& t! q! b' ~! K& T  ~[ 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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我以前畫左個chart去答,# }; W: G0 }9 R, t9 w4 O
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:. z0 C0 ?3 {0 U. i3 l
唔識隱藏...已經諗到..

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% C( n6 n, ~' \$ wsor !!!....e加改左7 m  j5 Q+ |, Q: ]; }" U

  o: s& F% A3 M0 Z/ J, n2. 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 u$ k0 g& b) u; g' t% q2 ^9 y
相信e條題目都有吾少人玩...

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! s; G2 p% u/ W' R* b. M3 SPlayPlay, 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:  K$ Q! @3 ]# n& ]8 z* d/ K
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8 h  L% v& I5 BPlayPlay, Let me know later who has the right answer and I will add points accordingly." `$ H6 d( V, L+ F) U5 C
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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

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1-6 vs 7-12( R5 l. E+ a6 P3 F7 S
if 1-6 = 7-12     13 is fake4 `- Q: y/ H9 h0 y$ c. {. S. \
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if not 1 T* Z0 x7 f( J) H  T% `

) f! U( \: y0 c8 q& [. c" e% UWeight the 2 time
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Suppose 1-6> 7-12( _) ~2 f0 ^% O- {7 @

  g1 T) L9 R' M9 |7 |+ E/ Q1-3 vs 4-6 - Q' R/ t* a+ |+ M# A

7 A0 X2 ^, X9 `$ NThen Weight the Third' d7 K) G# k' z* I  i4 B. z
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 7 C' q$ s0 k% M& z

' B2 q/ |0 ~" ?$ W: y. `5 y9 Kif 4=5 6 is the fake one
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, Q& {, d% `  H, Nif 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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Group A: 1,2,3,4, E! k' `/ H+ w  Y* X5 q8 Y' t% y+ O4 O; H
Group B: 5,6,7,89 y0 Y, q; n7 ?( M+ T8 T
Group C: 9,10,11,12( P- `) u: N! X' \/ i; c1 T
Group D: 13
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Round 13 G  x6 a. B6 ^# s
Group A vs Group B+ x3 d! C/ B/ L1 g" ?
如A and B一樣, 即較輕一粒在Group C or D5 V7 u' n( X# H8 \2 N. h

4 j' E- E! Z0 G- T  W1 p, f# Y( ~7 ORound 2
* H' g3 }2 ]$ Q5 m0 a再在Group C拆成:# j3 t: p2 ]8 L$ g2 Y
Group Ca: 9,10
) C  Y$ c" {/ p0 jGroup Cb: 11,12
4 B% F' c8 I$ A" o& k7 ^然後再秤, 如一樣, 即13為較輕一粒.- V" q4 I2 j" O( J

. ~) X/ H3 L% h* T7 R如不同, 即較輕一組有一粒較輕波子在其中,
; ~7 ?5 O" f( \: ~/ E4 B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1 `9 Z, `# [: X+ s+ D
Round 1; H" |- z( m" F. J, Y" C: L0 f
1,2,3,4 vs 5,6,7,8 = equal* V5 P3 x" J6 H5 M

0 M5 B/ u% K' |( ~4 E3 zRound 2
" T" r9 j2 ~& Y3 ?9 H2 V. n9 s& j- r# j9,10 vs 11,12 = 9,10 < 11,12( z0 G" e7 T8 L+ r/ W, o$ I1 |

2 u- A3 m( G# D  Q7 L; oRound 3
5 U' M5 \$ M. l9 vs 10 = 9 > 10
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" m- t0 g  m: J0 z+ MThe answer is 10.# {& R+ V* w2 |
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e.g. #2 假設7為較輕的一粒
# W! D1 X0 W1 c" u+ @Round 1
5 y: j% \5 b/ s" y; ?* n9 I1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
3 \% ~/ a" x3 A* |5,6 vs 7,8 = 5,6 > 7,8
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Round 3; Y. j$ g; X& \+ E) c1 d
7 vs 8 = 7 < 8
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The answer is 7.9 g/ E. c" @' n1 j" |
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e.g. #3 假設13為較輕的一粒8 u% q0 }/ H5 n  G/ I5 F5 a$ }+ W5 J
Round 1( m8 q  y$ k. U) v" e9 s
1,2,3,4 vs 5,6,7,8 = equal9 A! N9 j2 n* f- u2 {7 _4 a

7 l- U# [6 L3 Z4 ~Round 27 N% V0 W8 m4 a: ]! X' y
9,10 vs 11,12 = equal& ?7 ?# k: y' ?/ I
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No Round 39 n, c( J' r0 ^$ A

6 n' ?) A. m0 T7 t2 j6 EThe answer is 13.
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唔知我答得正唔正確呢?!
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) r) A" Y) ]: Q/ }[ 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% s& V' S/ M7 |, |
if 1-6 = 7-12     13 is fake
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if not ' x2 T( W, w" ], E) [

, J4 M8 `. h. r1 K3 v3 [; B, SWeight the 2 time 0 W6 Z% C  }1 {! o! S4 w& H

# E: I# A$ ^7 `, K3 w  t5 aSuppose 1-6> 7-12
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8 t; K4 T; r5 m1-3 vs 4-6 $ d+ z% z1 h- V/ E5 |* |7 \& a! W
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Then Weight the Third
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; b/ _$ _& [# M7 I) fSuppose 4-6 > 1-3" ~  g+ L9 b* o" C6 ?

2 X  e0 }! y6 w; gJust like the first Step
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. k0 J6 a8 }3 l# z9 X$ w6 T4 @4 vs 5 8 [) @6 B* ?6 P5 U7 d( m$ z

4 V; q/ T5 G% b9 o+ x' E: |" s8 Cif 4=5 6 is the fake one $ i4 e& j7 q' ~0 z6 H

. B2 z' R& N& g7 k: Aif 4>5  4 is the fake one
+ N! I$ J- j3 Jand so on......................

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問題第二步
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0 }, N2 c7 e9 U+ W8 N" {2 k- DWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6: }: y$ I6 J: l5 p! B$ P4 H
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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# L' [. x' k  Z' y

6 R) x/ m3 B7 q( s2 v& o9 N% h7 oWeight 1:  1-6> 7-12
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, Q7 d8 s7 r4 a  Y( @( \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