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" L- E4 o4 Z: K
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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)。' z2 |  e% R& R$ [) @
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？』6 I4 A9 C4 T. D; D+ A
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注意:
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4 G6 h0 F3 q" _: i2 L. F1. 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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% e& v) k; U; b" Y+ y2. 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:" ~6 C3 D; f" O! G
相信e條題目都有吾少人玩...

" f2 }7 C; G1 Z* L6 G$ y我以前畫左個chart去答,: B4 G) o& [3 ^+ n( n* j8 ?
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。) M# [" Q( q0 a3 u( {) A& }
13.........* C- _, g! S0 P. s! B
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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:$ P/ K; I/ p7 a" Q* Q

7 {6 J# e7 `7 _我以前畫左個chart去答,
; @/ ]1 n( z: x1 L  u等我搵下...

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. d' ?- I. v" ]. k5 j% Z' N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:
: ]6 Y  g3 Z6 b! R唔識隱藏...已經諗到..

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sor !!!....e加改左
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, ], n( K$ O: u: |* [& R2. 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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6 X( _% ^# {/ H; s# u; i[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
# c, Q& B/ W, B相信e條題目都有吾少人玩...

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! H6 I3 M7 y. S& @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:' K, L% w5 e0 c: q: h+ D. W  H

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.  N: Z3 X/ S4 {+ F
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Thanks

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0 {* L2 u; Z( C( s6 |* M9 e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 7-12
/ e& X5 S' F( p. C+ r- g0 Jif 1-6 = 7-12     13 is fake( P- O9 L* O3 R: W$ p

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* W5 u4 R6 ~5 k, XWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 $ ~2 j: r% e4 E1 D+ Z! E) c) ]% `

! [2 b, Q0 ~6 TThen Weight the Third& _. u' |0 R% u9 D0 r
3.
9 @; q1 w! m1 A; R5 [; P  q3 k
1 k1 T9 y; j  A( D, G! xSuppose 4-6 > 1-3
  u- ?' F& A  P5 q6 `' h/ ~9 H8 n% G" p$ ~/ a: |* J" H9 E
Just like the first Step) b) R5 e7 b# h  H* s" K  l
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4 vs 5 8 m7 k! S$ V. n4 M4 E# @% h3 ~

/ ~, o* B' |0 Y& T7 `) S* t  b+ tif 4=5 6 is the fake one ' S* O( p5 p, e
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if 4>5  4 is the fake one
8 h9 O9 c7 D7 e0 f, v) v
, S* t) P# @/ l( ]8 |and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
( d' }( }3 ?3 F: h1 d9 y( YGroup B: 5,6,7,89 P% \7 U' [; I! {2 `
Group C: 9,10,11,12/ x1 R! B3 N. c
Group D: 13- Z/ _0 p( L( t- n
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Round 1
, b# K4 z8 L) w/ }Group A vs Group B
! Y; _4 w8 V  G1 S4 N$ S+ U+ [如A and B一樣, 即較輕一粒在Group C or D# i$ C6 q2 z+ a+ L0 a, _& H

3 ]+ Z8 b9 v' pRound 2
/ w6 ]6 N/ j5 ^, y2 Y( X再在Group C拆成:
  |6 R0 J) P- u1 S$ zGroup Ca: 9,10
- ^2 w+ L6 S* [: tGroup Cb: 11,12& F% L( t: Z- G5 {' G  j
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,
0 M0 J- T, B2 D/ s要再秤, Round 3, 之後便知答案.* I- H3 l5 C! _7 U9 y+ z0 \: ?: d; e

; _% |; r1 I5 q; ]e.g. #1 假設10為較輕的一粒' Y0 z1 L) a: S  w% k/ C) }. M
Round 1" T9 Z3 f+ v* x& R
1,2,3,4 vs 5,6,7,8 = equal1 f- \8 W5 U) j

5 `1 s9 ?$ z1 V" o0 KRound 2* h- m7 G; F8 U# P8 b! h5 O
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
0 c9 H3 m. ?# s9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒' z5 c+ _/ M* w9 b
Round 1' R' M! _6 i- |3 l* o' ]" x( R; P' K
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,87 ^! i3 t  [2 f! ~
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Round 2  N. y! ^- l& [8 w* v! z
5,6 vs 7,8 = 5,6 > 7,8
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7 v3 k# h' V& l2 s! e4 ]' nRound 3
: G  g' Q; S8 a, f. C% l7 vs 8 = 7 < 8
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+ ?1 V4 ^1 u1 d& `7 lThe answer is 7.
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e.g. #3 假設13為較輕的一粒7 R# V, |2 Y& `
Round 1. }3 h  u( e$ f# M# i1 t8 B
1,2,3,4 vs 5,6,7,8 = equal
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, J4 w& q0 a8 p5 _/ c; r' @Round 20 _* @0 k& [% v) j9 C8 ~" e
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.0 M3 \- }, m( Q8 h  n1 C* c
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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:6 [2 {$ G  z2 g" k# k, |
1.
* ]( B! A$ V' V8 ~, l9 U( ?! X1-6 vs 7-12+ O; D% ^+ g& [; G) s' d  ^$ W
if 1-6 = 7-12     13 is fake$ T8 ^$ j$ g# M; l$ K

4 D- {2 a, \) a2 Y0 Y7 q# V+ z) {3 Pif not & Q+ s  z( P% n, S* Y) e

8 D- U6 G' o8 `! A- EWeight the 2 time
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' N3 R" j: l5 G! a; RSuppose 1-6> 7-12
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1-3 vs 4-6 ) L7 y. |6 l, I; {' ~* f! Z
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Then Weight the Third
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! ~5 b. y' C. v* S. d& f
$ v4 i' s5 |" ^Suppose 4-6 > 1-3! r9 l  q5 Z3 [& Z
4 [$ O4 \( k6 V% g0 M7 x# L
Just like the first Step5 `+ q9 _* l- }; Z' t: I
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4 vs 5
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if 4=5 6 is the fake one
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) E) x5 P. n% Y2 i( q% L" bif 4>5  4 is the fake one
9 O0 U; t8 i, q5 C. jand so on......................

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問題第二步) f! S5 o7 y( u+ K8 }% T

# z, o% h0 u8 @. N9 A* h5 q9 \Weight 1:  1-6> 7-121 t- ~4 o, n! P4 z# @; F& o

9 `, I5 d/ F" m8 b2 @% w5 \Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6- a  W! H' G2 A+ ^0 m6 i' s

5 M3 l- c/ e) c8 f1 G# r! V' ?你第三步点去搵 7-12 边一粒???4 D( j" ]# v3 @6 x- D# h# _

, v) G* f/ `0 R# |4 J4 c========================================
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+ O3 \8 e+ F1 Y問題第三步
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& n7 f4 g4 o0 b) gWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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8 Q/ _# S) k9 {, U% M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