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)。* C- M3 y5 i% N1 Y
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？』; d* V/ e- y7 q8 m

- k# O4 V) C6 [' |* ?: ]6 t注意: 0 s6 F4 ?! p7 H$ I: p

  n, P; @4 j: t8 D" Z1. 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
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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 21:34:3 o; s& S5 n( ?% E; Z. f7 H5 H, v" \" ?  r
相信e條題目都有吾少人玩...

( C- _1 d! p  T( J我以前畫左個chart去答,! b+ m! |' g. F" {6 M$ s+ X* h; j
等我搵下仲在吾在' ^& }6 ?( r. q9 E

0 _- N! i' H" @' M" {2 a) P6 K當日用左37分鐘答１２粒波子，差７分鐘才合格。
- p, i' ^# H* P5 @2 @13.........
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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:( }+ c+ Y4 i* j3 ^
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我以前畫左個chart去答,
0 @' u$ F* u% p2 o& }3 t2 E5 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:
7 o! B+ G5 ?0 N% m7 B; i' H唔識隱藏...已經諗到..

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1 E( S# g2 N5 Y3 c) g' g4 _8 zsor !!!....e加改左
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' q: \* f0 s! G6 }9 x5 v4 U2. 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- C1 X4 h2 F8 f. i8 R& G+ N

0 E" m. c8 _! j3 a/ [0 _' 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 k  k% @- o8 ?% [$ [3 K
相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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( ]3 y" G3 y; i# P1 MThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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% [' z: A3 y+ H, Y5 R" d) V; EPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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% ^' D$ M) Q! A# o4 W( l( m2 jThanks

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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.
6 p' _: I7 {9 i4 C; Z1-6 vs 7-12
- o2 ?3 Z& ]* a  zif 1-6 = 7-12     13 is fake
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if not $ |( }& c7 v7 X9 m0 D# P

3 c! [8 ~! x! `$ |' k+ _/ XWeight the 2 time 4 k! ]. b( j! S0 f1 ^. ^

# k! m6 S! s) Q. _; RSuppose 1-6> 7-12$ B( h: O( C4 M& F; Y
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1-3 vs 4-6
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2 i9 [3 ~' Q6 r, v, HThen Weight the Third# S  z* U4 z! C- K0 v
3.
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. {, J( w  r6 o5 m' Q8 L  wSuppose 4-6 > 1-31 N/ ~) W$ Y# E8 j0 d/ d

! E: p3 @. t6 g9 p; \Just like the first Step
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4 vs 5
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. ^* s4 @/ ^! H$ t; A6 V# \9 wif 4=5 6 is the fake one 6 B/ ~8 T2 c" ?! [
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if 4>5  4 is the fake one - }4 m9 H+ a. I  v6 X) V$ D3 U

: l6 C, ]% s7 }- w8 ^6 }and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
, |; e0 p6 j3 p1 ?8 y2 z1 @Group B: 5,6,7,82 r2 V8 ~7 H# A* J$ a
Group C: 9,10,11,12
7 V% w' U" W9 w. V2 S" [$ kGroup D: 13
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Round 17 ?' H! p4 ^3 D" r" r3 x6 C
Group A vs Group B
/ ^0 v! x" g1 ~. Q; q如A and B一樣, 即較輕一粒在Group C or D1 B9 ]" E+ o" l; L

/ H. E, m2 y6 K7 N# ]3 x$ XRound 2
; a5 ~2 [5 S: H& K( o) \) g再在Group C拆成:
2 b- z8 {( w8 A+ VGroup Ca: 9,10  R' F" I% |. d- S5 f
Group Cb: 11,12
- \4 o! I( x% `  a* U% h然後再秤, 如一樣, 即13為較輕一粒.9 c, _5 z; D/ |/ A

# t2 \1 n5 R' |如不同, 即較輕一組有一粒較輕波子在其中,
) `9 K5 D' H2 m9 X# O& X$ B要再秤, Round 3, 之後便知答案.- ], E% l* U9 g! B

' V- ^" Q% {" te.g. #1 假設10為較輕的一粒
1 s5 I$ a( t8 K( T# e  _Round 1
* I7 N  d8 @1 m( v+ {% u1,2,3,4 vs 5,6,7,8 = equal% V0 [/ p5 \4 _5 W# |$ E* U$ ?

) p& c1 d& r  a: L. `& M1 NRound 2
" M( o2 _: ^! `' s$ U& n5 d9,10 vs 11,12 = 9,10 < 11,12
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Round 3
# W! X* w1 b9 f4 ^% I9 vs 10 = 9 > 10$ N7 l* }! K5 o# ]

7 a; T2 k: D3 g+ j' L6 Z$ w' A1 RThe answer is 10.
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- k3 a% P( E8 k  R# Ue.g. #2 假設7為較輕的一粒, i( }  c" o, w6 g" v$ p& G, q
Round 1
) E2 A1 o) S; i1 U7 ?  _9 J1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,82 F: ?5 C  `6 k# f
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Round 2' H& |1 X$ ]4 }6 ~7 W( P
5,6 vs 7,8 = 5,6 > 7,8
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0 @# D* o  E; r- _' E0 Q9 cRound 3
. n  m# `8 l/ W+ o1 O0 j7 vs 8 = 7 < 8
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/ Y8 k( z4 ]/ Y) d0 Z& r& o. N0 RThe answer is 7.
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* x: K. V+ C) Re.g. #3 假設13為較輕的一粒
( v6 R& f$ V6 ^+ p/ QRound 1. R  ~: c& \0 C2 i  J1 Z& R
1,2,3,4 vs 5,6,7,8 = equal/ v6 v6 L8 i; B% r

+ h+ l( V6 m' _. lRound 2
# R/ l+ e, I5 N) E9 }4 _9,10 vs 11,12 = equal1 p  s2 Z% a- h4 l  |
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No Round 3/ N+ K/ U5 |  X  B9 @

+ `" u; J5 \7 y  q* a# Y9 b  _! jThe answer is 13.
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唔知我答得正唔正確呢?!
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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:. Z: H# v4 m5 y/ D8 D9 V8 [
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1-6 vs 7-12' X8 i6 K/ a: x- k7 d
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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5 B0 A5 E" a; k" b) D# WSuppose 1-6> 7-12
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, ^, R$ K1 W  y" U, O# `1-3 vs 4-6
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$ t/ i, s5 v0 i! x7 rThen Weight the Third1 `7 V; W7 Q) s9 \: _
3.
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% X- |# P/ B8 ASuppose 4-6 > 1-3
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  y6 ]# }* c) J- h8 DJust like the first Step! i* B9 e2 @- e  f3 ~
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4 vs 5
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8 c3 d$ X  X2 X( l3 q( @( `7 F1 ^, v$ Rif 4=5 6 is the fake one ' K, S8 c1 b6 R  c

5 R# x- D% k  r7 bif 4>5  4 is the fake one 7 z( R' Y3 {1 o% }! x
and so on......................

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問題第二步7 Z  b# w# S3 Y+ L6 F1 b

: n' j/ l$ {4 u: ~0 D$ ~0 CWeight 1:  1-6> 7-12, [) h! x; I- _" ~
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, {5 F9 n* ^+ k2 H
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你第三步点去搵 7-12 边一粒???  v# \& U; g! G* U- f
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========================================
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問題第三步- J0 m$ s- c0 k) `9 b7 u
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Weight 1:  1-6> 7-12& O# W/ X: P7 x) Z$ K0 @
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Weight 2:  4-6 > 1-3
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; u5 Q! B( c5 V: U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