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)。  ?( \) i8 v& @( G9 L  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: ( y. c/ n) G! i
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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. 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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  b3 Q% e% ?& f- ]$ b[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:6 t3 B) X4 [' m. b6 P' H: [
相信e條題目都有吾少人玩...

) U0 J$ g# s2 d' }我以前畫左個chart去答,
$ P" ^/ ^4 b4 j4 Q# T# U* ]等我搵下仲在吾在% ?6 C8 b7 U7 c1 M

' d6 u/ P7 Z3 C# N# t, v% `當日用左37分鐘答１２粒波子，差７分鐘才合格。
, k# s  J7 _1 x13.........7 y8 P" N. }( X+ ~: B+ `* m6 J
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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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3 `+ I- n: _$ J我以前畫左個chart去答,( f% t/ t& M% E6 v; \) `: e; 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:0 y+ {) o3 Y  L( Y& {
唔識隱藏...已經諗到..

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sor !!!....e加改左
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3 v, @/ k6 c( l& J9 r. j8 I2. 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" X1 X( `/ W  V! b- J! G
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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:
: E. X3 O- a9 t  N3 h相信e條題目都有吾少人玩...

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- z9 \+ u: A3 q3 e% kPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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5 m* |, s( V5 I6 `Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& p2 [- j* |, H9 b( z8 P. s3 `0 B

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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( A8 d  L. x. Q5 `3 n! b0 p# {% dThanks

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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.
9 D1 T/ _6 f6 m; n2 y6 F5 G1-6 vs 7-12
  S) s. n9 N: p1 R# [- K2 }if 1-6 = 7-12     13 is fake
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( ~, k  B+ ]9 Z+ R7 g% c, jif not 3 F# z, v/ l( r

: f5 \% ^0 I9 g3 vWeight the 2 time 8 c* X( t" R" y2 t  q+ i

$ }, N4 Q  b9 kSuppose 1-6> 7-12
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1-3 vs 4-6 1 G: w6 u& R8 ^0 O- J6 v; A: j
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Then Weight the Third$ c# ^) y, o3 `# d0 e0 p1 e
3., I( H0 l' [% {% B% s& B2 A

( X: T; h: g) w. E5 SSuppose 4-6 > 1-36 B/ A, S( k( D) K3 D. T* o& _
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Just like the first Step
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4 vs 5 ) H" [0 p1 d! ?( |/ L6 f( H

4 `# k! V" O' W  N, gif 4=5 6 is the fake one 6 W; p: m  N/ L0 T
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤0 S% j6 U3 K. V9 i! w

  c3 |8 G% L# k( SGroup A: 1,2,3,4
5 o9 T2 F' O- M2 ~' J( \, t( xGroup B: 5,6,7,8
( r/ |* `$ m4 B- L- A2 u" |3 cGroup C: 9,10,11,127 k5 a4 O' a+ Q; p8 Y8 z8 X
Group D: 134 N! q# G% ?( i1 ]# P9 @

, V5 M1 t9 r) ]5 M! K: QRound 1
6 p, j; u9 V) S6 ~# g! AGroup A vs Group B8 L2 ^* \6 Q6 T# Y8 ^
如A and B一樣, 即較輕一粒在Group C or D
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: P+ s0 k- D- ]6 ZRound 2) m4 x: m5 X4 N# d2 C$ @1 M
再在Group C拆成:8 f' L$ @2 d& I6 y' }% \, B
Group Ca: 9,10
6 e6 E! s5 z, I! J1 [Group Cb: 11,12
$ h# i) Q0 D8 E然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, , I% M4 q, a9 }+ E8 r
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
$ y4 `; Q/ `) j; b9 u& ARound 1
! k& G# e0 N4 I) x( N8 i2 P1,2,3,4 vs 5,6,7,8 = equal% ~5 I5 I# f& Q3 x
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Round 2' {$ i; G6 x0 U/ V6 c
9,10 vs 11,12 = 9,10 < 11,12) W+ I' Z1 ^7 y0 j/ E
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Round 3
- h& q" k! U. A9 vs 10 = 9 > 10
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( l& t! }; T- \* |' XThe answer is 10.5 T( h4 a9 y7 _0 x  x2 y- `; w
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e.g. #2 假設7為較輕的一粒2 O/ @, V+ s! K# e7 z
Round 1- O% x8 u! R* L* m
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* A9 P! \  H7 z5 I" @& W4 @
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Round 2
, C8 g- q) [0 a% H8 {5,6 vs 7,8 = 5,6 > 7,8
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Round 3
1 d* H5 S, }: ?- s3 d& v/ ^7 vs 8 = 7 < 8* U1 _3 U% p8 K; U$ N
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The answer is 7.2 W" f5 Y5 i  E3 Z" x+ x/ j6 x

% |2 d) _% V0 L2 _7 Qe.g. #3 假設13為較輕的一粒
. s/ [; S! E9 y8 K: BRound 1
8 x. O0 }% T# |8 H; j" O1,2,3,4 vs 5,6,7,8 = equal6 W) ~; n' V- i5 n* D- T$ A# }$ Q
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Round 2
* I# I! R  ^' g; |! L9,10 vs 11,12 = equal/ n! h& A$ z5 I

% b. r* v+ [$ v9 v. M, V* NNo Round 3* W9 S3 c9 @5 o' r1 q% S+ [

" N+ T% E. W; `6 s6 F0 @8 F. u) j5 CThe answer is 13.
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唔知我答得正唔正確呢?! ) @0 M9 [% k' T  R) U

' a" l* C% G$ x9 O! g8 S[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:. Z% w: Y/ {/ O4 Q- m! u
1.
/ ^5 \1 @" r: F* A  @& o  o6 B1-6 vs 7-12
9 k0 I# j1 ^4 U. u9 V( ^; A& `if 1-6 = 7-12     13 is fake; c3 e( q! n# A; A: U

: c# U$ ]/ x/ Gif not 4 k& v- [) W0 d5 `/ R8 {, y
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Weight the 2 time - }- H! d1 f4 d6 R
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Suppose 1-6> 7-12
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% D- m) ]5 }! ~% Y* i2 n1-3 vs 4-6
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Then Weight the Third7 U8 d$ U; y/ o8 T. N5 H
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% D6 y, C: y; s8 p, QSuppose 4-6 > 1-3) D+ D, f, ^, i* q6 f% J- C! x- ?  N

/ |1 ]+ H: K( u/ b  oJust 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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; j+ C# E; p# O1 ~8 }if 4>5  4 is the fake one
, {: u/ Q# P- x. d  j- yand so on......................

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8 u+ \4 V7 [( Z問題第二步
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Weight 1:  1-6> 7-129 D+ I7 |4 h" C9 _; i
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-63 k% ~  l6 T. S8 d/ c0 f* d8 f

7 c8 n8 Z5 D( Q& S% f" F" W你第三步点去搵 7-12 边一粒???  n) e3 _3 ?- v* t
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問題第三步
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Weight 1:  1-6> 7-129 H( c" e: |% G5 o. k
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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