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  b! O/ J- }8 u8 r, T
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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)。
3 X3 L. ]3 ?# E; v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？』! C  _& ?( a9 U5 X5 D! Z2 r

. Z& z) d; d. {( ~注意: - R9 O" N2 B* U
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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, R( ~, d! ?* {* c# L8 S

! D3 Q- \% o$ _, {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0 h5 g& }+ b) o" I; @' ?( e

$ y* }2 Z1 {6 ^3 N5 l  y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:6 _% y: q: G- R) _
相信e條題目都有吾少人玩...

# q" i: l# f1 [6 Z$ a, ]我以前畫左個chart去答,
1 t7 }) p2 O  C2 m; L3 }  n  R等我搵下仲在吾在' E6 k. c/ Q4 x/ j# r- k
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
' R: l# S7 _/ @* d13.........
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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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; b3 U& o, |$ t* C" y我以前畫左個chart去答,- X6 O, `, b9 r) l2 ~0 G3 A. 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:! s5 ]6 u; h+ d0 u
唔識隱藏...已經諗到..

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sor !!!....e加改左
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1 `1 l  y( G/ g# d3 {" T, 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4 u. \+ k) j9 }( X% @6 V+ {, e1 I
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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:
* E% f+ \- z( V! Z! o1 _9 E8 B相信e條題目都有吾少人玩...

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$ Z! U- f' l  ?' ?PlayPlay, 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:- ?! q, W) s0 i! x9 P

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1 ?" f: a- u4 U* v3 a5 T" oPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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; d* }+ D/ E) ]: K7 E8 ^6 g: iThanks

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. e( {4 ]6 C3 R; h不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
" m* d/ c0 l$ ~5 C8 r1-6 vs 7-12* n8 ]7 v* S9 A3 T
if 1-6 = 7-12     13 is fake3 A, {0 I: _! D$ B9 o9 D' s% S5 Y" h

5 d0 N; `' R. s$ jif not 5 Y/ G0 h% Z7 f# ~# M+ _8 c( }6 l

- w4 v* h  D% d0 D) j9 \Weight the 2 time : Y! u3 o8 T$ a
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Suppose 1-6> 7-12
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3 z' r8 `5 b( u2 Y1-3 vs 4-6 ; z1 w% L# c5 ?6 e0 o" z9 y

! s4 `7 I0 P. m! h; Q& GThen Weight the Third
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Suppose 4-6 > 1-3  I0 M" L3 p2 E! X7 C
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Just like the first Step
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9 e. H- a$ T, V6 _) _4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 5 S# S' N3 ?; y

; P4 C% k, [) f8 E% n4 Oand so on......................

hello1997

分3組4隻波子秤- f2 d3 G% e" t7 j& g

2 E2 E% G- @3 x; |Group A: 1,2,3,43 M8 V5 l! {4 l/ S
Group B: 5,6,7,8
$ J) [& q* i2 a7 l3 y9 uGroup C: 9,10,11,12
: ~! L; P; J/ QGroup D: 131 x3 E6 Y9 i# }; \& `" c
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Round 1
; S6 n* D2 ?2 ?) V* m1 A2 @; xGroup A vs Group B
0 P7 a. T* J, K: D7 i# ~% R5 u6 z如A and B一樣, 即較輕一粒在Group C or D+ w+ d7 H1 L$ i& I

+ L' f) H/ h" e0 f" A8 hRound 22 V! T  R  V1 f2 Z/ Y) E  k" e
再在Group C拆成:- R2 Z  }2 a1 w" m, z# F
Group Ca: 9,10
* i* R, b. {5 H  ~: q6 I8 T( {Group Cb: 11,12
! V/ b4 u6 H" ?然後再秤, 如一樣, 即13為較輕一粒.9 b& p* T' c6 O* f+ I! f

- e) e& A' v/ q7 K8 t如不同, 即較輕一組有一粒較輕波子在其中,
8 N$ g9 t3 n) i' z; J! H要再秤, Round 3, 之後便知答案.8 c3 o, G" ]# W6 V! N) t; W
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e.g. #1 假設10為較輕的一粒
3 O6 j* v# k8 C  c4 S- QRound 1
% h3 e$ ~. j9 A7 o; m) _' w1,2,3,4 vs 5,6,7,8 = equal
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Round 2/ ^+ }) W6 q  _5 }
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
* U3 J) F/ Z# y- C: f1 s, C2 o9 vs 10 = 9 > 10" p$ K% t5 e8 {* f& }: W; g
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The answer is 10./ ^" Q, d  ], t, u

, J2 ^5 K' @9 M+ h! L' S7 I& Je.g. #2 假設7為較輕的一粒& Q1 U7 A/ b. {2 G/ B% u4 g. m
Round 1
8 Z  `% t0 d" C. n9 z% N$ g1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 [4 `/ ]% B2 X  u

- g+ ~! X6 z  J+ ^2 q$ iRound 2
2 S4 w+ g3 T# Z' \1 I( h8 h5,6 vs 7,8 = 5,6 > 7,8
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% C9 I$ S' ^/ D, `! {- j( oRound 37 W3 W$ r& O1 N8 p1 B
7 vs 8 = 7 < 8- G3 X) d1 W" A% i4 E9 \/ a

) y9 s! o2 ?7 E3 [! |$ zThe answer is 7./ V! Q$ {9 u# P3 h! t

$ N7 S3 h3 X7 U* t" Y1 p; k9 S, Ne.g. #3 假設13為較輕的一粒
3 D$ J  q8 P1 @2 j3 N. f2 \4 n1 qRound 1
' L& J  g( }0 x" a3 \* H2 ?1,2,3,4 vs 5,6,7,8 = equal0 S! y; ~; I/ \
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Round 2
% T5 t& N( m! ~2 K2 Q3 T9,10 vs 11,12 = equal; A2 H2 m% f$ C  b' B

0 T: f- G& |7 B! nNo Round 3% P& ^0 {& O" ~

5 |9 _! U0 U" H7 A! D5 eThe answer is 13.
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唔知我答得正唔正確呢?! : N- x4 ^9 d0 T; T8 ]

% o5 q, r; M- R( ]) J[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:6 e+ ]+ K" G* e1 M/ q( R# v) t
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1-6 vs 7-12) c0 [; n/ b! N4 N8 M
if 1-6 = 7-12     13 is fake0 B3 U# J" u2 p7 u: g) E% I
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if not
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2 S3 D, \; n  b% k! N  oWeight the 2 time $ K+ p! N$ S% B: p: S

8 q( F0 X; l0 u& r4 `3 O8 X7 }) HSuppose 1-6> 7-12% w1 K6 R, r$ f
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1-3 vs 4-6 - {& |: p# m2 k

- ^. Y# I0 `! u$ D, D/ |# ~( UThen Weight the Third
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9 h1 z3 M& ?) NSuppose 4-6 > 1-32 \- k7 `1 T- ^; j; {
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Just like the first Step" J" w1 }, u) A% |4 h1 g: h
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4 vs 5 3 [3 ?: _2 ]  n+ t7 y% c9 p' X
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one / U/ l4 C/ R* ~% s& f& n- R
and so on......................

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問題第二步
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$ S, ~# E/ s5 D. R) v9 {Weight 1:  1-6> 7-128 Z2 p' _: `) S. H8 q

4 f* U/ ]; e. z/ {' N$ J( t  d! GWeight 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7 P1 A4 I4 D: f+ H/ W1 s+ ]/ Q/ @

3 C( x/ m6 l2 j7 E5 dWeight 1:  1-6> 7-12
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* S# h" U$ N" ~- F1 RWeight 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