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 A9 k: U" c" X! D8 P1 o$ e+ b% `

1 h4 l- [" v9 G『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)。
% Y. {6 Y7 B- G8 h8 U: X5 s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: 0 `% I# N/ D1 }. w4 m  J  M
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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" b( m2 g$ T# Q& w, B
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:9 a( N4 a7 z1 f4 k2 f7 i& a
相信e條題目都有吾少人玩...

; k/ L* ~, u$ V# Z0 K* D5 y( p2 y" u我以前畫左個chart去答,
: @8 m7 K  N) f6 U, o# p等我搵下仲在吾在% Y; Y9 M6 Y* B2 v8 h; ^$ u

6 ?4 S- ]$ Q# C$ G% x% E# y當日用左37分鐘答１２粒波子，差７分鐘才合格。3 K* X( b0 ^% V7 h% r/ h6 J9 m
13.........
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$ c1 [8 H' v- `$ M/ l! \[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:; S" Q3 o. [1 L2 D5 n/ R  h8 u
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我以前畫左個chart去答,
# c7 @' G* w0 q7 J等我搵下...

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$ Y1 ?* x2 J8 [) @, F. E6 o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:. S  D4 N0 l! h5 N# t+ s0 b
唔識隱藏...已經諗到..

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) E0 I" }. f( N) x+ r+ Dsor !!!....e加改左5 G0 K1 w6 x5 r$ {) p8 H
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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" L4 O8 Z  H+ ~% o* b
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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:
& B. Y# `% l; }相信e條題目都有吾少人玩...

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  U5 \! D" _' _- S3 X* }PlayPlay, Let me know later who has the right answer and I will add points accordingly.. w7 n$ W, n  l; h
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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.
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# G# W2 \% y" B. j( _5 k1 @5 xThanks

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$ _) n# y9 @! F  l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" i( G  J  N5 M
if 1-6 = 7-12     13 is fake/ V) _+ I$ k( X5 ?2 F
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if not
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0 o0 R" e1 X/ r, o* S( fWeight the 2 time
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Suppose 1-6> 7-12  I/ \) T5 U! q. m
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1-3 vs 4-6
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3 e; Q1 @8 Z6 I4 z* i, g* GThen Weight the Third
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Suppose 4-6 > 1-3- s, E0 t, ?6 K" L* y

% H$ ~5 d9 y  {Just like the first Step
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4 vs 5
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% V1 L# |+ C- _7 g' J9 G9 vif 4=5 6 is the fake one 1 [0 i+ }; b5 B5 q2 Q2 s3 n7 v

* z- _! h5 z* R9 [; |if 4>5  4 is the fake one 7 R, O+ }/ y  r7 i+ D; [

6 p0 A8 A1 F8 gand so on......................

hello1997

分3組4隻波子秤, h1 z: i" J$ L; S3 v. D1 H; R
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Group A: 1,2,3,4" l8 ~6 p6 h; D) X. Q( Q2 M
Group B: 5,6,7,8* n6 ~. q% O- v
Group C: 9,10,11,12
" J( i! q9 |" z& D( R' YGroup D: 13  S: @0 W8 ~* D3 X7 V: d1 C

, }  G* y1 U/ u8 P! \Round 1
8 v4 e' `8 O5 y! `+ `Group A vs Group B) N; M; N/ P& w, U/ _1 @# O6 ?) I
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
2 N" J; B: h* R7 c9 _( V# G$ Q再在Group C拆成:4 F! ~. ~4 r6 V. k- A
Group Ca: 9,10
8 y- s; e. {/ e6 C, dGroup Cb: 11,12" t; B1 A- @) ]) j2 B
然後再秤, 如一樣, 即13為較輕一粒.3 J% b: d9 E) M" {* |% o& U

; S9 V% r% l( @! G2 c. G/ ]如不同, 即較輕一組有一粒較輕波子在其中,
3 `  s* l0 O. `- b. x要再秤, Round 3, 之後便知答案.% P! v7 k1 G7 M+ B$ G

5 q5 V# x/ G2 A; Ne.g. #1 假設10為較輕的一粒6 t- b, n8 \9 w6 p$ V3 w0 u
Round 1
" h! T% u6 F3 s8 |1,2,3,4 vs 5,6,7,8 = equal* B( b, J" j7 a$ t2 \

0 Z" }, d0 h1 I/ p- R8 RRound 2. c3 q  L+ \4 i$ a8 E4 l
9,10 vs 11,12 = 9,10 < 11,12  p( k! X+ Q% {& {1 C1 y! K4 y
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Round 3
. N& h% L. L. _9 vs 10 = 9 > 10
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The answer is 10.. V$ s) \2 G1 P

: A  O2 X, h1 t/ S" j) P, \! Y4 \e.g. #2 假設7為較輕的一粒
* Q, l; u$ @$ d3 bRound 1; h* k: G' g! b* z7 T
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. Q* F- r8 z- l3 T) D

0 @: _+ B' b5 }5 Y- e8 ^) k( sRound 24 R3 a8 L  x1 M) X3 G
5,6 vs 7,8 = 5,6 > 7,8/ D3 t8 Q+ e0 X+ n. J4 L
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Round 3
" k& v: ~  V7 c" K* A* E, U7 vs 8 = 7 < 8
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& q. y7 C3 B5 JThe answer is 7.
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e.g. #3 假設13為較輕的一粒
" A6 M3 r$ N/ q( X& |Round 1. x" ?; _; F7 f+ |
1,2,3,4 vs 5,6,7,8 = equal
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7 e! O1 [4 D4 s. K; m# hRound 29 ~, I( ^# g, \* X& a+ E
9,10 vs 11,12 = equal4 R- E+ G& \  G" y+ O' R

7 X9 P9 C5 b' a& Q$ NNo Round 31 o, X8 }) p& Z, n$ J
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The answer is 13.
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唔知我答得正唔正確呢?!
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% B2 N* t  X* @: u" g8 S' s& Y[ 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
7 g% I6 e& M; Hif 1-6 = 7-12     13 is fake
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% M$ p) ~5 M" c' Yif not 9 A3 x# u# O* G! x

) Y7 v% N1 s% B8 N5 l) G+ D9 x* ~Weight the 2 time
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Suppose 1-6> 7-12
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6 R/ x2 L# k3 o2 h) G. w1-3 vs 4-6 . g6 }! ]/ v" J/ n+ ^
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Then Weight the Third7 T' u" b( }1 n: c$ F- d$ O
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Suppose 4-6 > 1-3
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Just like the first Step8 e" W* i4 q7 W7 B) }" h

1 \6 V0 T- a& j! f5 v& h0 t4 vs 5 3 x, u1 }4 ]$ |- ?- m0 w( N( U

3 r% ?/ Q( J5 yif 4=5 6 is the fake one
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if 4>5  4 is the fake one ) E6 ^5 i5 w$ B* r
and so on......................

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問題第二步
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5 v! J$ V/ n" U8 _9 MWeight 1:  1-6> 7-12" m7 z5 L" Y, E$ c& I6 D
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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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
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( ]. Q9 C+ e2 v4 ^4 [3 s* {. g( MWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 3 \, [0 p2 R- i7 q

3 ^( J2 [% L, B! M9 t* W) l" Z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