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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2 h7 A9 z. j1 R3 C* L+ l) V" ^『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)。
! w( Y. R& e9 G' p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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% C# L& t7 m. {2 p. F* T, b, k0 r注意:   s1 L+ t& X/ k. i: c

# g9 w( y. C+ Z, p5 l0 ]* M7 L& j& t1. 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% W6 n6 Z: ?. Z4 v3 x
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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9 n7 U6 P) _1 n6 p4 Y/ [

9 b, K3 g# ?5 Y8 c( ]& W1 X# V1 Y% x[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
2 g& d) U8 K  A+ P% I/ H* z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,& Y# g: `" z8 q$ F
等我搵下仲在吾在5 s/ @% `6 @& c8 R" J7 w) t
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
& S/ \3 N$ S( ^  \8 W6 D13.........( ^) }' }6 N. F4 G: O0 `
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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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# V7 G% ^. d; \+ `我以前畫左個chart去答,
9 Q- I# E; G) W" E* D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:, K  w+ p: `# H
唔識隱藏...已經諗到..

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+ W* S, _% I9 ~; E- u- ]) z+ msor !!!....e加改左
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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; n3 p; N) b. c5 r$ H
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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:0 N, C6 D0 w. ^: a; u+ ]3 H+ S
相信e條題目都有吾少人玩...

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$ h* S! f5 D/ l' B; A, EPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 I3 H/ f0 V& H( f" i* A

) R: ?; C6 g5 j* E+ HThanks

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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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

1.
% y- a" i- Y! }: h/ w1-6 vs 7-12
1 K8 Q1 Q* P1 `7 ^3 {' ]if 1-6 = 7-12     13 is fake0 j% U% E! ?4 ~+ j2 v; E# [2 W
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Weight the 2 time ! q  p0 H- s$ R, \  I  [/ o

$ ^7 n8 j& o$ a7 {# \Suppose 1-6> 7-12
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# `& o# h* s: [2 @# F1 v- t, n+ h1-3 vs 4-6
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' G; R8 p* y' T, t. f4 h6 BThen Weight the Third
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( q: D& @3 a- KSuppose 4-6 > 1-3) Y: F/ ^" {' k

. n6 z4 L" f( m2 M0 b! dJust like the first Step: b. M7 J) H+ c
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4 vs 5 ! `  s& N( ?2 n1 j& ]) ]

7 ?5 J9 V+ c2 h8 G" p0 O; x- Fif 4=5 6 is the fake one
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$ f, o% k  D7 X  ?) |# @if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤/ z# V) Q% a0 U* T! s
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Group A: 1,2,3,40 b5 `+ X4 V" E4 q7 _% q# r
Group B: 5,6,7,8" T0 F9 c( N/ b/ i+ H
Group C: 9,10,11,12
, h1 d% V  w1 U. SGroup D: 13, k/ M$ m7 H4 b: d) P
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Round 1
6 H8 }: z# u2 ~$ O/ SGroup A vs Group B
4 J, w4 r4 {3 ]如A and B一樣, 即較輕一粒在Group C or D
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Round 2$ o/ G% R, _% H6 t# _/ G! ~
再在Group C拆成:  y% O5 |* q0 B  X1 h6 B2 C" f! a
Group Ca: 9,10
4 o( \. m: P% u# kGroup Cb: 11,12
$ m2 G+ U: Q1 b  l: U7 L然後再秤, 如一樣, 即13為較輕一粒.! O& j* @& z- R+ n4 I

: q5 b' X- ?7 ]$ ^# k1 C! j! r7 y如不同, 即較輕一組有一粒較輕波子在其中, ! S" L) w: Q0 U- f0 X  {: j
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* q3 \& d1 y- E" n
Round 19 ]1 V, e. I( v2 @0 o
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( a) C/ `+ Z+ E# V3 Y+ Y/ g9,10 vs 11,12 = 9,10 < 11,12  {* x* X* G- S4 L9 y; [- @
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Round 3
! f! x$ f: ]6 ?* ?; a* S9 vs 10 = 9 > 10
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The answer is 10.
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3 `" t" D1 o% ?" j$ ~# `( r4 We.g. #2 假設7為較輕的一粒) a- h, `% n; O8 r' s+ l
Round 1/ |" E% `4 @& G
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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, z  e' Y: A# @2 |7 t& p! yRound 2& {! ?, E* N$ w3 f3 J6 j6 H  F6 C
5,6 vs 7,8 = 5,6 > 7,8
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Round 3/ i/ C/ o" Y; u8 k" a! U
7 vs 8 = 7 < 8! ^: ^- B/ e* [! K* n/ ?0 D

( q2 M: U3 }/ KThe answer is 7.% q* c  T7 Y9 X  \# {' U9 G

" J  c  X' F* V5 f- r! q! Le.g. #3 假設13為較輕的一粒1 {, |# Q8 B5 _
Round 1
& I2 f) ~; c2 V* B% c& K9 J7 C1,2,3,4 vs 5,6,7,8 = equal
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Round 2
4 R1 t) |. n+ c* K0 K# I9,10 vs 11,12 = equal
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8 J9 }) D# s6 A4 [* g4 c0 D! z8 bNo Round 3
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The answer is 13.' k% a* }" R0 C: ^1 a

2 k. t! w3 S/ k8 d唔知我答得正唔正確呢?! 1 E  L  J: e: S2 D- d
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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:- Z6 z* o& U: d
1.
" n% K6 S7 Y$ h8 g1-6 vs 7-129 B0 M; Y; Z1 n. R- y
if 1-6 = 7-12     13 is fake7 P# b* ]$ m: t- k

8 }$ j, f4 O0 N* F1 Aif not ; q/ Q* {; {3 c
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Weight the 2 time
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Suppose 1-6> 7-12
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6 r# Q/ @% h; X. ~4 o) Q1-3 vs 4-6
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( i5 v0 C( d4 aThen Weight the Third( g; @) a9 Y* ^! ~
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Suppose 4-6 > 1-3
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; V$ K& q1 M& G& WJust like the first Step. z7 A1 T; `" L; D

* y; o* S0 |$ a4 vs 5
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if 4=5 6 is the fake one
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4 }0 I. A$ m, W4 u; yif 4>5  4 is the fake one 0 h; a8 _) E: R$ L# b) M/ M
and so on......................

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問題第二步1 o  v5 |6 Q5 N8 J
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6; g# b& F6 U3 }/ S3 W1 ]+ d

6 s" [7 V) A$ ?0 [2 Q你第三步点去搵 7-12 边一粒???
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========================================
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問題第三步$ k5 w0 ]: I+ |8 J, h, \

$ ^* F$ i) @5 p. SWeight 1:  1-6> 7-120 o0 H0 B1 x  n1 u" G' N

# S1 ^, Z$ K, w6 }0 L! B5 FWeight 2:  4-6 > 1-3
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0 O2 X- R: J9 i: F& v7 v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