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3 F; Z7 ]$ b/ J6 m
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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)。* t, c! W& {% o# O! d  _) k1 W
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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6 a1 y# R7 e  D0 N$ M( r! \: F注意: 7 G& h3 o6 R( V; F2 L& ^; s

1 m+ g- D% n' x" I. x1 `5 K& T( ]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9 l: a4 [/ t$ k# W2 h0 q7 w

- w# A2 g" v* o2 o2. 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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5 O+ n% R: f5 [[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
) x& d, T9 X% P6 h/ [; \; x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,
) U# @) m2 Z' ?$ Z1 p* Y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。' \  j3 s) @. k7 p7 \
13.........
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! Z& B& {5 S3 c: j6 t/ S- O[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:" @) I/ ^5 m1 F' N9 h

% |* |% n' z7 |% i$ a/ v我以前畫左個chart去答,) |3 e6 h* u5 w, e/ F0 R
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; c, K2 L" O% H; Y
唔識隱藏...已經諗到..

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sor !!!....e加改左
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- u4 ]# I2 X) G2 y$ D' a: g2. 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( R6 Z# ^% j& j. Y7 F0 j' K

, R# A$ u! _: `[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
) }( x( w! |5 V* O3 h相信e條題目都有吾少人玩...

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4 Z! y+ T6 p- R% QPlayPlay, 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:
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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.
+ B8 x5 n  s' D1-6 vs 7-12' T" V3 @2 c5 @8 k1 v8 T
if 1-6 = 7-12     13 is fake$ E( g4 ?4 m# N& T0 a

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- S) S8 z" a. E& ]8 [Weight the 2 time
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Suppose 1-6> 7-12/ G- q$ I7 G/ l" O
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1-3 vs 4-6
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4 @" t: R! h  k  w  `! R7 L. }2 sThen Weight the Third- p# [, z. M2 L) [
3.
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Suppose 4-6 > 1-3
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Just like the first Step5 ]4 N/ K1 |. f, l  ?

( c# p& y- {4 L+ r2 I2 z& N4 vs 5 ! w0 f8 p: h, z8 F
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if 4=5 6 is the fake one 2 }: ]- `: }# \+ P, w3 c
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if 4>5  4 is the fake one , ?$ H/ g4 L$ j; q8 c
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and so on......................

hello1997

分3組4隻波子秤& {. f5 X, t& P9 W2 @5 K: P0 B

. r2 ?8 w, S! g4 t7 [  kGroup A: 1,2,3,4
( n% Q1 t! g+ K/ Q* y- jGroup B: 5,6,7,8/ ^* o6 p' b0 L" D7 n' I3 ]: B' j" V
Group C: 9,10,11,12* F  Z7 n( G5 }
Group D: 13% @+ c: S6 B+ i: Y
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Round 1
- O5 Z/ i- R/ m9 {Group A vs Group B
! |; S* V$ p% K# l" F4 `! e如A and B一樣, 即較輕一粒在Group C or D
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4 ]; o" K5 e6 Y5 J& ^Round 2/ N+ f. d# \' b: T3 d' m# Z
再在Group C拆成:; U* M- E9 g" G# H; j
Group Ca: 9,10
' I) J( _6 ^9 e/ |Group Cb: 11,12
( f1 K5 Q9 X! i' v. Q; g9 V3 X  Y然後再秤, 如一樣, 即13為較輕一粒.# A) N5 ^0 h$ {- y5 f) \  P, F7 f

4 D  r8 {- q( w7 r# a; D# p! t如不同, 即較輕一組有一粒較輕波子在其中,
4 v. F9 H$ t3 u/ N+ ~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3 M& }" L4 x7 _
Round 1
/ V2 l  K  u* x, b0 S) E1,2,3,4 vs 5,6,7,8 = equal1 w) J7 c2 T% ]% @- u; a6 u
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Round 25 o$ i: I) G5 C1 C& z
9,10 vs 11,12 = 9,10 < 11,12* h7 E! _. ~9 I% _

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9 vs 10 = 9 > 10
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The answer is 10.' o2 U( i/ u# V( x

! l5 b; K0 U* X+ b+ f" ?e.g. #2 假設7為較輕的一粒5 i5 D* Q& k( s2 `. s0 [$ I0 L
Round 1. [: R+ M- J0 |0 c: v/ u
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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2 W: o, u/ M& _Round 2
' R* C' d: r, ?- h5,6 vs 7,8 = 5,6 > 7,8
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& q* a1 z2 c: q* g3 _1 o. tRound 3
' X7 H7 _4 O$ }5 F8 N7 vs 8 = 7 < 8
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The answer is 7.6 g1 Y7 ]+ y- J8 G8 _
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e.g. #3 假設13為較輕的一粒
) o6 u# }$ A4 n( hRound 1
' |# r" D+ X6 P! \1,2,3,4 vs 5,6,7,8 = equal, p7 ^+ G/ P$ q- H$ I+ `2 k

) I$ i  J5 \% F) M9 q; FRound 2! i& s8 a7 P* R/ j1 v6 }1 x
9,10 vs 11,12 = equal) i' B( r  o& [8 S# ^! B$ f5 {  W% K

/ b& l* m! Y# P% F  f2 l2 @No Round 3
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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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8 c) R+ e2 ~# ]% m" K[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:/ k  x/ _$ V" u  Q4 K6 c! @
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1-6 vs 7-123 j; t$ T; ?+ a9 d
if 1-6 = 7-12     13 is fake
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4 r: H. Y2 b' mif not
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$ Y* Y! |- V3 y& PWeight the 2 time 9 l5 ~7 T, K* C4 @5 ]$ U: M

5 ]2 r( b: w/ Z* y) USuppose 1-6> 7-121 m  r  a; o8 |& k$ H$ M

1 v* @3 l/ }2 W$ T- n! G1-3 vs 4-6
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1 {% D: S5 s2 N" U3 Q, BThen Weight the Third9 H) B. ?! q1 u1 U& p- a% a; R
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3 s, Z4 u) J/ g9 M; M. @( k% g+ y$ USuppose 4-6 > 1-3# L# y$ N0 w9 N  j7 l( k
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Just like the first Step
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4 vs 5
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8 T0 E) \1 K) }  cif 4=5 6 is the fake one
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/ m  l! V+ ~* ]5 B; `" Nif 4>5  4 is the fake one & d* u% m. a5 I& o' [
and so on......................

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問題第二步4 g5 q9 p& y" G( a
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Weight 1:  1-6> 7-12" A$ c% f) d4 x

. r! }% P! S' u0 N, x; mWeight 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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0 T8 E, D4 l% H0 t3 m問題第三步" B* Q( p8 h% w6 W

2 j% C0 m. n/ F: f& Y& e& KWeight 1:  1-6> 7-12# d4 E1 A4 `% W$ Z' H- L  C9 ^& z
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Weight 2:  4-6 > 1-3 & O% k- {6 I/ J. @2 p/ y, j- m  ?( N
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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