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9 D4 S; m! F" s! H# x4 _9 F

) Z3 R8 J' n- H0 @1 M『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)。
- y3 t. l- @9 T% ~. @. b$ D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？』# n0 F9 c$ K  X0 {6 C

9 F* `% T7 m+ c注意:
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9 d+ o0 R$ v- j, d1. 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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. O5 s  d4 }& f, t) |$ F0 n' 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  , hide 字要連埋 , 內容 = 答案0 \. `: [. A) q

! p7 z/ t8 A. E' P1 k3 p& T[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
- h7 `* D3 ?# H相信e條題目都有吾少人玩...

& r; K( ?8 M* A8 p' O' d3 x! F我以前畫左個chart去答,
. f3 j$ p1 [2 W等我搵下仲在吾在. ^' B; q; N/ K
  [5 q& f5 Y& i# ~) q, ^7 @- Q8 K
當日用左37分鐘答１２粒波子，差７分鐘才合格。8 b3 d" c' S. W* _1 y
13.........( B4 y  `! R8 s8 k! f7 S: r! f$ s( Y! ]
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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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& I: `! e8 K5 c6 L5 f我以前畫左個chart去答,
9 a+ V9 z' s, s6 d5 W等我搵下...

8 V3 `$ q* a8 M5 O

6 ?/ f; E0 B# q% S/ l" j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:( x: L! v3 H4 b. i2 h
唔識隱藏...已經諗到..

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sor !!!....e加改左/ F% C. T7 l" y

$ x, p9 R. e+ 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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  t7 u7 X9 t1 g[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
- n: X0 F9 w$ D% h! W+ A; ~相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly./ A1 D% O; ~% I
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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2 S# W! V2 T1 t6 W& _0 a/ KPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 v& `0 R1 V1 p0 S
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Thanks

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% L; c5 w" \: D, _  T0 V; V' G" M不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
6 {( E6 t4 q! N5 S1-6 vs 7-12! G0 [0 w! A4 d* q4 r: m
if 1-6 = 7-12     13 is fake7 K2 @, U  K. X% P+ J  Q8 r: a
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if not
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3 G% o7 s5 Q# _9 F5 v! iWeight the 2 time 3 r  A) R4 {4 v2 e- x9 x

+ P% E2 l/ n+ V( D! ]Suppose 1-6> 7-12. C* w2 Y/ o: J: }$ n7 `) w
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1-3 vs 4-6 + B3 N+ `3 g( A$ W  I) [

; ?2 l' y: ^3 p+ h- c: n2 DThen Weight the Third
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) h& h% }8 j2 ?& y& DSuppose 4-6 > 1-3- S3 u2 Q+ Z; M3 Q( K: b- R* p
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Just like the first Step
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5 c2 l; j1 x$ z1 \+ A5 x4 vs 5 - E0 ^6 q; R3 a6 ?
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if 4=5 6 is the fake one
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- q3 ~  o2 R% k- r' D' A/ Xif 4>5  4 is the fake one , S% U1 x8 h" A: t  q

  i  c) Y  |' l/ w5 v* yand so on......................

hello1997

分3組4隻波子秤
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" q$ z# L* `- @3 f" ?Group A: 1,2,3,4
- t, G. u4 n/ dGroup B: 5,6,7,8) {8 Q& [4 F' Q' [) a
Group C: 9,10,11,12- L' v4 G8 v5 Z! L1 L
Group D: 13
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4 K( @* b) n- h# ]- N$ ]Round 1
9 l$ T1 {! Y3 ~Group A vs Group B0 g  Q4 U. Y% L/ z
如A and B一樣, 即較輕一粒在Group C or D
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Round 2; W  y$ C5 j7 A5 {% a# B- l
再在Group C拆成:
" }; q2 z; X+ W9 M3 TGroup Ca: 9,10  e% d) ?# n4 B" c2 h; ~4 |. ^8 ~
Group Cb: 11,124 Q  W! p$ G: U
然後再秤, 如一樣, 即13為較輕一粒.4 S/ e$ r6 G( w: u' E/ b4 V
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如不同, 即較輕一組有一粒較輕波子在其中, 7 J; R2 S# J" ^0 U* h# m
要再秤, Round 3, 之後便知答案.  R! V: o9 M- I8 G: z+ f. I6 F
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e.g. #1 假設10為較輕的一粒  s( Y5 O% z1 `; S- N/ u1 e
Round 1& R5 T# d, z5 e% M
1,2,3,4 vs 5,6,7,8 = equal' F* g% t, T2 L4 C' m) H
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Round 2
5 Z  C# N3 M6 _# s( B7 |9,10 vs 11,12 = 9,10 < 11,12
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( J# ?% w6 y+ f. z& k6 @4 NRound 3
7 i7 T! ?& ^/ T& k" d/ @4 l2 L9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒6 _( C6 k& P' x# d% \% l5 {
Round 1' @' @% I& b, J. A$ e1 g: ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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, g2 V/ S$ ^2 z2 w7 T3 pRound 2+ v' f) ]6 w8 i  r' H; {+ q; c
5,6 vs 7,8 = 5,6 > 7,8
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) A) q; t  T& K) d; f" }5 @* ]Round 3
+ C: S$ P" L5 l# R4 w+ q/ F% \7 vs 8 = 7 < 81 D& i' E( _, i2 `% Q
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The answer is 7.( H" D% [, l7 w, _: k; b

/ I/ }+ k; F" y/ Pe.g. #3 假設13為較輕的一粒6 \0 {/ {  l) i
Round 1- `3 v7 v1 D6 t2 Y) ^$ M  p1 I0 G
1,2,3,4 vs 5,6,7,8 = equal' k" c; m- `- W
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Round 2
9 F" v% Q# T$ ]& G( C  X3 K9,10 vs 11,12 = equal
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( n/ f" T, K/ x! E, \/ mNo Round 3* f# A! @% b6 F+ R1 H

) [' @% w6 ]0 ^The answer is 13.
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唔知我答得正唔正確呢?! 9 w8 B6 ~! x' Y1 i4 ?+ z& d

4 s  }* ^" p1 j( i, r: }6 Z[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:9 T$ M" ?# d- x, ~! t
1.% ?0 S3 m2 i* D6 b3 k7 q; f
1-6 vs 7-12
; Y6 a. e8 A' `( Lif 1-6 = 7-12     13 is fake/ C8 B, P' T! [) _2 K8 [. o

- |, w. _/ N, e) i' r: Y8 cif not
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# o: Y  a; I" [0 n; SWeight the 2 time
4 ]) Q, Y8 C! P6 E! e) q# ?1 |; U& B$ E3 L0 w9 p
Suppose 1-6> 7-12
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( g8 L! s7 O; m7 g$ u6 l7 ^8 g1-3 vs 4-6
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/ F: s% g) Y$ v5 F! w. P: X. FThen Weight the Third$ b; `* Q) q3 u. m% g( a# z0 i" \) S
3.
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, Z) `' o. Y! F  r' h% lSuppose 4-6 > 1-3# L$ h  `- v6 Q
1 r- a& t! h$ n0 x2 H5 x
Just like the first Step- B" ~% a$ o0 {* k1 G% ?

- R( G1 U" _! X! X8 c5 I5 F4 vs 5
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/ n# G1 e/ g7 ?& s/ rif 4=5 6 is the fake one : T3 R* ^$ }+ g  k" Q

( U/ K6 }$ h" x. r; C  a1 }, O: Qif 4>5  4 is the fake one ( l4 G" }& f! x& V
and so on......................

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$ L! t, s) f8 i# V4 L7 f5 D) O1 `" }: ?問題第二步
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) I0 }' F3 ]* g' w: iWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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- O8 l3 R  |$ l+ B% H. H, W你第三步点去搵 7-12 边一粒???0 D! u5 S; q: w4 C
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問題第三步. S; x  f6 B4 R9 j, x2 ?

  _; h( \; n2 Z4 c# UWeight 1:  1-6> 7-129 D( P* T# H& e) B. j5 s

5 r) G6 |$ U' d) Y( jWeight 2:  4-6 > 1-3
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1 j! k' A# m8 e- _5 S$ N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