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)。
" ~! O1 ]$ X7 w9 m. b6 T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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; Z) D, x  {3 U8 u注意:
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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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: b3 b' X* ^4 `$ }4 l2. 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:
, S# I- r# W( i5 F* {8 f9 T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,7 w% y. G% U& U( h
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 S6 a9 S' t9 d1 E2 z
13.........; ?9 a$ K1 D" s+ l
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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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) W; B$ l6 J' ]- T我以前畫左個chart去答,+ M; J! z3 X0 N1 I. x
等我搵下...

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6 z, ~. t. |( P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 H6 x' z5 M: ?; c- a- K
唔識隱藏...已經諗到..

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sor !!!....e加改左  u/ F- g" _6 C1 v: J" A
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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7 _' e' S  L. J) u9 y( C2 z2 o
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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:
$ }: E1 X& z, R相信e條題目都有吾少人玩...

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% W" k' \* Z7 c) F9 I! MPlayPlay, 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:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.( [2 ^7 K( d$ ^3 A7 A
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Thanks

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" r) M: B+ N: g9 w3 j: p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
, J9 V" ^7 [/ E5 lif 1-6 = 7-12     13 is fake7 G1 i. P7 a: H# I- z. m

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Weight the 2 time 8 a, l% i" Z1 r: f1 ]9 M: F7 m
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Suppose 1-6> 7-12
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# s8 ?2 \, G% {. E# H: s/ m: Y, t1-3 vs 4-6 ; t% r6 d3 P: L' j9 @, S  o, A- j
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Then Weight the Third- v* o, r. I7 A6 Q3 ^) R% ?) F
3.7 ^5 m: v8 ?! ~9 }( k* d

* k# p" G3 P$ z# iSuppose 4-6 > 1-3
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8 }- y2 F! F. {3 @8 G/ g& yJust like the first Step6 I& s6 z3 t1 l0 O' w
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4 vs 5
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if 4=5 6 is the fake one 8 {  t5 L9 U2 b2 P/ L+ p

5 \+ L% f+ s: C# }7 Q& [if 4>5  4 is the fake one   f; I4 U- O! i! \$ \
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and so on......................

hello1997

分3組4隻波子秤8 y- u: ]2 H$ Z
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Group A: 1,2,3,4* I7 r1 E6 l( T7 I1 q! M" v5 `/ x
Group B: 5,6,7,81 p8 a' v. `+ |7 i9 ^/ Q: X
Group C: 9,10,11,12
. t" H6 |! `# HGroup D: 13
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Round 1
8 L: y  |: B5 s- x- yGroup A vs Group B5 j( @! b, v& Z1 S+ V( {2 d
如A and B一樣, 即較輕一粒在Group C or D* r* e6 U3 d8 w: T( e

2 J9 O8 S3 u8 q$ H8 [$ FRound 2
1 B" A) I4 }* R) U再在Group C拆成:
/ j6 H3 e1 j$ N4 dGroup Ca: 9,10/ s. z! V) _% R' r  O; b7 {
Group Cb: 11,12
" V' n" N9 g% O/ ~2 L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, % M; S" M  c$ l- Z" e# H$ G
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0 R0 H, |! I' t
Round 1/ N5 b) y7 z: ?# c6 `
1,2,3,4 vs 5,6,7,8 = equal
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Round 20 n4 k' F/ ]3 k6 h* }+ s0 A& T
9,10 vs 11,12 = 9,10 < 11,12% O9 `: ?6 R$ ?

  v9 e2 v; E# a' m0 b* PRound 3
0 C, i7 W+ K4 K' \4 l9 vs 10 = 9 > 104 \4 G# ]; _& O/ k
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The answer is 10.# Y7 C( i4 ^& ~. j4 j

" n3 [4 y+ V* n( ?8 ve.g. #2 假設7為較輕的一粒
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7 K( I7 N% ]- b* C# i$ X; e1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 T/ h, R2 K! u% ~. \: f& h/ \

: e9 u: _0 ]+ R8 IRound 2
$ Y0 H7 B# d8 B( B5,6 vs 7,8 = 5,6 > 7,8" P3 ~& l" H6 B5 n2 O8 C7 }0 d

3 B1 d2 r2 w5 |( g! NRound 3
+ {6 U) A& z& T( ^+ Y% T4 s& n4 I6 w7 vs 8 = 7 < 89 e' G/ D% z! u# o) I3 M2 w8 y7 o
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The answer is 7.3 J; g+ R! o- r) J) k* e
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e.g. #3 假設13為較輕的一粒, b6 z+ I" i8 g, U2 B' O& n, ~8 y
Round 1
, v( j% s3 t0 ~6 D+ }! |1,2,3,4 vs 5,6,7,8 = equal
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Round 23 m3 c7 S# R8 e% g% r
9,10 vs 11,12 = equal
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3 f2 Y4 l! \  N* V, H1 l$ BNo Round 38 N; G! q, O& Z9 N$ @

& [/ V# _. `& d- lThe answer is 13.
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唔知我答得正唔正確呢?!
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/ _3 ?& R, e) ?# N- G[ 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# j: h6 ^' K, x3 T, N% o; P2 K
if 1-6 = 7-12     13 is fake
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if not 4 |+ ^; F9 m5 E/ Q: F) ?1 S
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Weight the 2 time
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9 b" P. U( u  T7 j7 A8 E3 L3 ISuppose 1-6> 7-12
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$ Q, l0 d6 ~0 l8 _* {1 I- W- D# }1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-37 ~8 W% {3 ?* e  Q
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Just like the first Step
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4 vs 5 1 l! ~( p. b7 ?3 y6 `. W3 d
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if 4=5 6 is the fake one ; a; s( K# G8 _, J$ d

4 C% a! H% [1 K0 s3 rif 4>5  4 is the fake one
7 ]% v6 N  W, P  j9 ~( @8 s1 V2 oand so on......................

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問題第二步0 \! D( f, F* \+ u! s1 K

7 [0 m# R! D4 i; |Weight 1:  1-6> 7-124 x: V; |4 _2 F) U' l0 E
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6# y3 F5 j# s- B' o4 d
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你第三步点去搵 7-12 边一粒???, Y+ G  w0 c( G2 M2 p$ b* g

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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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+ i2 n: P# c/ O! }' W- @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