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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, R( J5 U0 J* l8 `  \『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)。
1 c& r# n# _1 @( k" k4 \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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$ a/ V% Y  ]+ a注意:
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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' j2 p* K4 @# q% i. D6 D. N

! p& ~; t! A$ J% w3 j/ K+ }[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:4 p: k- K' m1 s+ U# |
相信e條題目都有吾少人玩...

: y2 @- a' X5 i5 ?0 s我以前畫左個chart去答,& ^, n. h% Q& o( B+ S( D
等我搵下仲在吾在
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+ U+ [; G: U' n# D. K( P當日用左37分鐘答１２粒波子，差７分鐘才合格。; d; A. n( H# r: p
13.........5 |( F# @9 d# l" |% ?# R7 O
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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:! _; E# s+ \% d+ C- N

- @( _4 h5 p* A. M! `& K6 o我以前畫左個chart去答,
0 O) y7 J" s' H% j+ _  n等我搵下...

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$ V  j3 _  h5 l+ k- C$ l) A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:
4 O2 I& X0 c) R6 Z  c4 P唔識隱藏...已經諗到..

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  O5 i7 t  x  J4 W) S% ]4 hsor !!!....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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ {+ \5 s7 }3 q( }% @. B# z" w& l相信e條題目都有吾少人玩...

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. p! F2 v3 v2 G7 A3 uPlayPlay, Let me know later who has the right answer and I will add points accordingly.# P$ M5 p- e' [, Y) d

  M3 w% |' ^2 M1 h% OThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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! L4 _1 W7 N1 |6 f: Y, Y3 ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.; O$ \6 C* a: @" J8 h1 C. a
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Thanks

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( p7 o' C9 D- ]) j2 N0 {; i不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
  w5 G  m& z: B3 P& R1-6 vs 7-12# z' g& m7 j/ M4 H( i
if 1-6 = 7-12     13 is fake% A& r! Z/ q9 B: E# ?" q
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if not ! H7 h& \! `  }, I# b  q
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Weight the 2 time
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Suppose 1-6> 7-120 Z- C1 K, J0 Y# e: P

4 |' u; v% L- E  x8 p) L2 A' w! V1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3# Z; E5 n) c+ X/ i$ ^( o

& m8 U4 ]9 u2 r2 z( VJust like the first Step
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* D. |9 I( f5 _2 f% z7 }" Z4 vs 5 # L8 e& k/ ]% K- w0 b
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if 4=5 6 is the fake one ! i% S4 t" _5 w* y
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
& h0 E3 p9 V. @Group B: 5,6,7,8
* l: E( G- v" ^Group C: 9,10,11,12
" z7 p& Z$ G. m: S4 Q5 _( bGroup D: 133 R0 C, Q/ h6 q7 E& ?
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Round 1
, X8 K; |& @: j$ ?- _' Z" L" xGroup A vs Group B5 i/ _- H: \- ]0 Q& O' }: U
如A and B一樣, 即較輕一粒在Group C or D3 @' {$ \( |6 v/ o$ n2 v; U

: Z! ?8 M7 a7 C1 }. pRound 22 r( d/ t6 M) F9 e5 a' U
再在Group C拆成:
3 ~: f4 Y1 U' BGroup Ca: 9,10
4 c% l% y5 [% r  R; P  r( [2 i' H7 VGroup Cb: 11,12
/ m* x  K, e2 {7 O7 H然後再秤, 如一樣, 即13為較輕一粒.5 k1 b$ S0 N" I) e8 y: _
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如不同, 即較輕一組有一粒較輕波子在其中, ) [- I% _5 H, O0 z5 u* ?% X
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$ E- J, `2 q4 ?' X" }3 x- h
Round 1
/ ]% r3 ^3 t$ M0 L5 \$ ~1,2,3,4 vs 5,6,7,8 = equal- O( F/ d( ]8 |& D/ B4 U2 U- O1 y7 @& p

9 c& Q; X3 h" M6 \: C( IRound 2. F0 ~; ?- A& a- j9 Z: ?: s4 t
9,10 vs 11,12 = 9,10 < 11,124 K+ @( n7 U4 o6 R& x

7 d; s6 R" K/ rRound 3( ]# X$ f7 W1 x0 f/ R; |
9 vs 10 = 9 > 10. T" b2 ?% x' J# f6 o( s
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The answer is 10.
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, A$ Y* i$ U3 u4 a& M7 Z& I1 j. @e.g. #2 假設7為較輕的一粒
6 l& p( z6 Z5 g" R, U: ]4 iRound 1  `+ v' g; Z/ o  s  U
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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+ `( B/ c; A3 k, A& N8 ORound 2
( W2 {6 ^( A9 V2 u% G  M5,6 vs 7,8 = 5,6 > 7,8
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' L  N0 _! f( F3 ^) f( xRound 3
. Y( g# v" v( v# i4 G7 vs 8 = 7 < 8
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+ ~( p" l% ~) r$ sThe answer is 7.! s% D5 H# Z. Q1 |% b; \+ [! ^

( ^6 t. f0 B' n. ie.g. #3 假設13為較輕的一粒
  @" i+ d( ^4 ?' w! eRound 1
5 ]  q# t8 n3 I0 w/ K5 q0 q$ S+ C: `1,2,3,4 vs 5,6,7,8 = equal
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4 |, P8 K! T2 {Round 2/ h7 G5 I' m* ~1 h( ^
9,10 vs 11,12 = equal
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( I' C( m( O. w% T* [) q! @' eNo Round 3& U& ]9 `; F! N6 k+ Y$ \# @

; k( w: c4 D4 ~/ |# e% HThe answer is 13., N, ~4 r  H" _- O8 m; ~4 B2 I; @
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唔知我答得正唔正確呢?! 4 a$ ^  K+ [8 q5 l
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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:. ]8 U3 S, D9 Y" i, j
1.
. x9 e  }5 `5 R2 I& N! _0 D1-6 vs 7-12/ y, {# d* T- X
if 1-6 = 7-12     13 is fake  L0 V/ i6 Q  @& H9 G1 {* m
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if not # y- O5 }1 c- z7 |# c  J9 G  M
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Weight the 2 time
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" \0 e6 L+ C. i! p( PSuppose 1-6> 7-12
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1-3 vs 4-6 & p: h$ b7 l2 i. u( a6 ~2 r+ D

! `) W$ q# }* x/ cThen Weight the Third# r' J- [. C' }8 q+ t) N
3.
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# G' ]' |$ O: H7 V  N7 `Suppose 4-6 > 1-3
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( v* j. X. E+ q2 B) S1 WJust like the first Step
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4 vs 5 - m+ m6 b# z3 E9 v4 b) z0 |% {

' [+ t' I1 i, M# @if 4=5 6 is the fake one
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- Y+ w* m* l$ ?) u) L: Aif 4>5  4 is the fake one
! s( }. O, `" Z' _& J1 Zand so on......................

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# _4 j1 u  r# w/ k2 W$ S- Z" c- q1 D問題第二步5 p. V' R/ W3 K9 {/ S
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Weight 1:  1-6> 7-12) U- a0 x6 ?4 q" |. w- S

6 l" t) s/ d4 l$ z3 }Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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3 O% M  Z4 ]$ @你第三步点去搵 7-12 边一粒???
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. t5 A1 ?! k, u. p( H# ^$ t問題第三步
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! R: z; ~4 g% q* }) L9 C2 lWeight 1:  1-6> 7-12
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& j6 i  o1 B5 {! A6 v! `Weight 2:  4-6 > 1-3
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1 u) v( @  O6 `7 V3 U8 I/ o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