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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『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)。
5 w' O% k+ c7 d+ M0 u0 X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？』( h5 W9 K/ ]3 ^0 S

+ g3 X3 _/ ~3 ]注意: 4 }/ @$ s! Q; D2 X3 |5 D
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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
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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% o! K0 W3 w$ m/ p! k
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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:
6 `4 G# @8 r- i0 B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,
3 T. f2 I! E, t, r. l# w" ?等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
) [! F9 y+ s. p- g! k" v$ i13.........8 H$ _/ F, q# u2 h- M1 a

3 g* N  k9 X0 }' k1 W[ 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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我以前畫左個chart去答,/ y! e4 n& M5 ~6 ]; F# j
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:; f3 C" X  u9 X8 r+ }7 a
唔識隱藏...已經諗到..

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1 e3 N4 {* m. ^& N- ?/ {
sor !!!....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
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; C/ \& y% |$ f/ h3 A& F[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
8 Z+ d+ e  c6 `) Y( `: V( S相信e條題目都有吾少人玩...

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8 @% N; w' h/ u0 C8 v+ wPlayPlay, Let me know later who has the right answer and I will add points accordingly.. Q5 r4 {. F- `$ W) f
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& M. j+ h2 P4 [) v7 z+ l5 i

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.+ k% \; i+ m% n+ x2 ?4 M% Z

% e6 R. p1 K8 X$ C; zThanks

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* L: |, c5 X- C4 a; y" ?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 7-121 S* q/ E- O4 S' W9 i. n6 l) a
if 1-6 = 7-12     13 is fake9 \( Y! G/ a; _- O
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if not : m5 P  ~8 h9 }  e& q! }; p

, h$ H# d+ U& f$ hWeight the 2 time
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Suppose 1-6> 7-12
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: _" R% B! X( t# M$ v1-3 vs 4-6 % o7 e$ H5 C! a1 m

( h6 v, n. I) ?Then Weight the Third& ?: F' `' c/ g% h0 i1 D8 h- e
3.
6 a, d7 l! n8 o% e  {
- ^& N1 M, ]" W+ qSuppose 4-6 > 1-3# ]" j0 Z3 q$ _$ [5 S0 R# u# R1 B

+ S! o% v' [0 l" y% _* ~Just like the first Step
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4 vs 5 ) y9 ^. w" F5 m
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if 4=5 6 is the fake one 7 U' B! n3 N+ ]: P5 ^
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if 4>5  4 is the fake one ' q2 h# _2 h( q( z" \& u& D

5 O: P% y4 I( h4 t* K5 W" \: b% |8 y8 cand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,47 n$ V$ ?' G; J' [5 s* m; e. @/ D) z
Group B: 5,6,7,8
7 ?; M8 X4 |/ J/ aGroup C: 9,10,11,12
8 u, Z! A/ Q: s2 T: AGroup D: 130 n3 ?3 H9 `7 L0 s  f. [" G4 y: o

/ W6 g2 U9 B; E$ D% F8 [Round 1, {! ^4 J: w( |8 I& o% |
Group A vs Group B- G. i7 f* o( W
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
) s" C4 K  c3 u9 w( X再在Group C拆成:
9 F0 K$ E3 W/ P; lGroup Ca: 9,10
0 u- x" Q9 f  V+ o; s" W1 [9 \Group Cb: 11,124 S& H8 A: H0 I
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
7 O" W4 [5 }6 [  c; D, [3 |要再秤, Round 3, 之後便知答案.4 {" p- r. f6 m6 ?3 X2 X2 G, @& @
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e.g. #1 假設10為較輕的一粒* r  E- _+ G; |6 w& c. g2 V3 |
Round 1
* Y, R  ], r, K2 J5 G1,2,3,4 vs 5,6,7,8 = equal
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Round 2
  ?- J  q+ \  q* {9,10 vs 11,12 = 9,10 < 11,12/ c+ L! K' E6 h  J: k4 f3 ^

; z$ h4 B* {, G0 K( p+ ERound 3  U: N* Z7 \* C% j/ q; }% G2 I
9 vs 10 = 9 > 10  w: z/ _. ?5 T7 V1 r

8 b" Z8 V+ u) _1 UThe answer is 10.! L3 @4 }7 S; }% H- T5 B

( ?2 ^$ P" E+ i8 ~) }' V% h! Ae.g. #2 假設7為較輕的一粒
* m" J& d- I& @# _. d7 CRound 1" M9 t/ G; b9 A# o. n/ M& s
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,80 P3 n4 F0 }; x/ `+ _4 W5 ^' w- B

6 |& n1 n# V' F1 eRound 2& b- {1 l9 u1 b9 r$ K" r
5,6 vs 7,8 = 5,6 > 7,8
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Round 3' b9 m- b8 v; J8 |
7 vs 8 = 7 < 8) ?! ]& {% ]/ H  p: j

; d6 O7 U) k: J% h. {! g1 Y9 yThe answer is 7.+ I8 ^% h6 |( d+ }% P

, W8 p3 d3 p! W/ l% A' ?; xe.g. #3 假設13為較輕的一粒* H. E  i5 m1 e- P, T8 c* m
Round 1
, d* p) x* p) a5 K" @8 R1,2,3,4 vs 5,6,7,8 = equal# F( p6 c2 L6 t. R0 r
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Round 28 t8 ]4 h; a$ Q" o0 {# V
9,10 vs 11,12 = equal1 j; t' D; ^7 P4 Y- d! L" M3 x
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No Round 3% {, A% X; d4 @3 k( l. I

4 N- s9 D: T- r; X% FThe answer is 13.
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3 K. i, N8 ^) W" U3 q9 U$ ?% F唔知我答得正唔正確呢?!
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$ Z3 y# ~  ]* M8 d! P( d[ 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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3 V: ^, q" Q! O# U6 f* S, }1-6 vs 7-12
' y7 n1 x, \$ {. d# Lif 1-6 = 7-12     13 is fake6 k$ S* e( t( |' w- o2 s
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if not
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- j: Q* @4 v8 ?  a% Y  yWeight the 2 time
7 X+ N, g* Z9 W* i, _" R3 H) n( }1 y4 C+ x8 w
Suppose 1-6> 7-12
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; D$ b. @6 q! g1-3 vs 4-6 3 t: z" w: A- L" p
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Then Weight the Third
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Suppose 4-6 > 1-38 u- y7 J3 t) k  P% p

# f! h3 ]9 |( K# N+ iJust like the first Step
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4 g2 \2 [/ B$ Z$ D/ x2 Z! i! y4 vs 5
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if 4=5 6 is the fake one
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! s" d/ x2 Q, H# V% P, Iif 4>5  4 is the fake one   S+ w  M$ I& J  O* S# ?
and so on......................

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) W, l5 d) K6 ?) W8 S6 n5 I問題第二步
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) X$ e% ^1 [* \$ \$ d, AWeight 1:  1-6> 7-12
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8 r# K4 ?9 y& P  b3 `Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6: `' g9 G) v  p$ `+ T5 Q
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你第三步点去搵 7-12 边一粒???
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========================================- p5 y9 a. a) e9 V7 J8 C$ k0 c

% H  R. K# t0 y* [5 v2 P問題第三步; k$ y2 S- [. L9 ]4 f1 t4 C3 G2 A  C

& q2 j. j5 f+ A: q4 LWeight 1:  1-6> 7-125 C* A. q  j5 |" g

9 M8 L. O% B+ AWeight 2:  4-6 > 1-3 . U0 F- s1 N9 o

3 |& i3 H% T' ^" L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