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& O4 X" X! X+ N6 v4 _& t

) ]4 {2 h, I, K9 i$ K『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)。3 d- D% v. t& p" Q6 y
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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, O; @* ]/ {! x; D7 e注意: ' w, K) r/ W$ ?( T7 I: b8 O6 L

+ q" P# c' _/ `" a1. 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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. _7 E; d- T) K- ]6 L3 K2. 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; |+ A' o4 w% A& ~. y
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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:) F  {: K/ z4 J& l4 H
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,
+ e3 y. l3 S( }6 i等我搵下仲在吾在  x" r! a2 v& d( R1 ^

: M4 V7 c( [+ ^! j# {) Y當日用左37分鐘答１２粒波子，差７分鐘才合格。
8 M+ ]) ]6 h% K! u; s13.........7 c1 V: Q' R, t( k% z
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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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" V- ]3 G+ d6 C# W7 c7 S( a我以前畫左個chart去答,
7 y6 W& v" }# Z, h4 r  P$ ?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:
- r' g6 g1 l) }4 l2 E唔識隱藏...已經諗到..

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sor !!!....e加改左
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5 c( ]+ ?3 Q* W- p1 D0 I$ \+ r2. 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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/ i4 l  x; @- G1 d9 n[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
5 Y) c/ e  a+ Q; [4 w- f相信e條題目都有吾少人玩...

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9 b: @9 p5 H0 X6 s6 n+ c9 g; wPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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7 B7 K, G- _& m& [* g6 iThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 p7 z2 h! E' Y' S2 z" `+ }6 I6 H
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+ F: j  t7 ]# `( D# nPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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% v9 K# m; p$ w8 d1 ?" H
if 1-6 = 7-12     13 is fake5 T- q$ t8 m& X3 A7 r8 i

; q! v: e2 ^% w4 mif not
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& n* F% C% r. P: W9 ?Weight the 2 time
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0 @3 o+ T( g" t2 W* DSuppose 1-6> 7-129 C: e6 {9 R  k
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1-3 vs 4-6   y: q3 S% y! }  R  M2 K- J; f/ L/ h

5 E( X0 W2 t$ a2 J1 M) `Then Weight the Third
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Suppose 4-6 > 1-37 ~/ D' h& l, c* [1 X
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Just like the first Step& G7 L, {+ Q$ e& ^* i8 U( f+ y

2 ~: b( q3 i; s4 vs 5 % E7 l0 D* d/ }, ~8 |. ?6 j. W
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if 4=5 6 is the fake one   _& M0 d) h: D1 q0 l* T$ D' J0 S
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if 4>5  4 is the fake one
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. `' F( @3 N! n0 G2 k% Sand so on......................

hello1997

分3組4隻波子秤8 `6 j* ^$ v2 O$ i  f& z
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Group A: 1,2,3,4
& H' v* E, B0 O) D9 KGroup B: 5,6,7,8
9 l0 ^+ ^5 \4 D( k. g% j& T, uGroup C: 9,10,11,12( H- |4 ~: W+ W9 w" A) E* C+ F% N
Group D: 13! z! j7 J/ Y- s  w, A
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Round 1
  t' U& b# \2 l& c% ZGroup A vs Group B
! M- H6 T  G) Z$ O  P7 f" K如A and B一樣, 即較輕一粒在Group C or D5 `4 O( }  Q- @2 D) j+ N

" H, w% i3 p" |. Q, ?Round 2
+ G9 a; j$ b+ F* {7 h+ I再在Group C拆成:
" ]6 S! z% w8 K5 _Group Ca: 9,10
( y# F) s8 \. V$ X8 y+ rGroup Cb: 11,12: D" p# i% Z/ P  T
然後再秤, 如一樣, 即13為較輕一粒.3 @% ~' l) J: n. X/ D/ K+ F  O% n1 `

9 i9 C3 @! c2 b2 u如不同, 即較輕一組有一粒較輕波子在其中,
6 b8 E5 N$ @( ~/ l/ P: A2 E% k要再秤, Round 3, 之後便知答案.
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# h, k4 I& B/ c- he.g. #1 假設10為較輕的一粒" L7 J4 q  V/ ?
Round 1: |  {# v" q, k: a' v! R1 g
1,2,3,4 vs 5,6,7,8 = equal
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Round 2- b' X$ T* R$ y) p
9,10 vs 11,12 = 9,10 < 11,12/ i2 P6 x* n( }7 l9 W5 h
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Round 3
7 v4 I1 w. }. X1 K( A- W9 vs 10 = 9 > 107 m8 ]4 e' Y- H' Q& G7 I7 q" R

) [% d! |/ ~2 U& ~  AThe answer is 10.
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e.g. #2 假設7為較輕的一粒* Q; A1 O0 S4 |9 F7 d
Round 1! b' P/ E: q$ d& Q# k2 g
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2- ~2 k! U" }2 ?! Y
5,6 vs 7,8 = 5,6 > 7,8! T9 I; \8 s. F# t' `
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Round 3
# e' w0 p3 n4 ~7 v7 vs 8 = 7 < 8
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The answer is 7.9 p7 Z9 C  E/ N8 i6 m

; L6 X0 |0 c% {6 o& @$ ie.g. #3 假設13為較輕的一粒
4 R. v$ j, A% t5 URound 1  o/ W, o) k2 r9 D& O1 a. _: `
1,2,3,4 vs 5,6,7,8 = equal
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/ I# V2 G" R% \Round 2- n7 d; d3 N- r2 o; i" n/ g- O# f
9,10 vs 11,12 = equal
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No Round 3
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3 k: k( C# O0 Q" I' b0 ^The answer is 13.% x1 O' d1 t' A9 H' ]* d& l" m

5 l6 H9 Y0 m1 Y9 T; t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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1-6 vs 7-12; H. x2 _. U, C. R% b. P# o- q
if 1-6 = 7-12     13 is fake
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4 R4 j& `. D3 BWeight the 2 time
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Suppose 1-6> 7-12/ i! K7 f( f4 @0 E, F* _1 x
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1-3 vs 4-6 % l1 _! }3 @7 x

" ?# h3 j  Z6 W& D- M" c. `! CThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step# m% O" m( `7 ]
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4 vs 5 8 K! p0 `! ^; L% L) \" ]$ K

7 s, v6 J" M6 c/ ^if 4=5 6 is the fake one
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' e8 g- a8 i# ?, b- Uif 4>5  4 is the fake one 4 @3 m- j1 Q7 ~8 i) Q% ~& n3 o
and so on......................

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問題第二步
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! R4 ?& i! @: D# L: ]. J2 g; {, pWeight 1:  1-6> 7-12/ d5 }3 Y) J3 O# z' q
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-68 \# {) `5 I; F7 ?. T) @1 t

" u$ l) u8 P, J" i% K- _你第三步点去搵 7-12 边一粒???( t, [5 S2 Y2 W5 q& k* }

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7 d( C" e5 Q1 n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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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