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)。
* e8 g# s: X2 M8 @  Q' {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？』1 p6 f% ]0 K" ?( H
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注意: - U  X$ ]/ [8 _; s$ W
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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9 N+ x, T  e! _' a! |
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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:% f9 w' e& u( m' H7 a# q
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,
% I$ N! g1 U$ Z6 {+ Z等我搵下仲在吾在$ f. y. n- [& U4 ]  g: g, X7 S
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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:) f9 s- X! g' s$ T0 E+ j" C
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我以前畫左個chart去答,5 [7 D' {1 ]* E! J$ Q: x
等我搵下...

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$ _7 F. j3 S5 L: K, L! ]$ Y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:5 ~+ T( E& S+ e5 `& a
唔識隱藏...已經諗到..

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8 ^4 t$ z6 H, h! O" i* j# d: Asor !!!....e加改左5 U4 S; h; A9 s4 Z0 A1 N0 V
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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:. Z3 X6 \' m: A' D
相信e條題目都有吾少人玩...

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3 G  I- m/ p% f4 u; p/ S8 M4 ?# XPlayPlay, 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:0 d' y% R8 z5 B4 I" T) \5 R5 K

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.; G, z- l, ~5 Q( _8 i7 `

& k- u& f2 ^2 l5 y! N2 h8 [6 n/ RThanks

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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.
: q1 K2 A# d7 y; V1 |3 [3 |1-6 vs 7-12
  z& A* F" \  pif 1-6 = 7-12     13 is fake
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Weight the 2 time ; p, C) X) j3 b1 F3 E7 ~& A! _7 A

& \6 y$ Q: E% M$ ~% U- fSuppose 1-6> 7-12
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- ~* @% x8 x2 |4 J( ~. t% B1-3 vs 4-6 7 S3 ]; p& y- k- q7 n& L
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Then Weight the Third+ V& b! }+ u; H( ^( q
3.
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' j- L7 ~8 o+ @8 j( H- I2 ^4 CSuppose 4-6 > 1-3
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Just like the first Step. J7 i3 }6 M2 A  L6 v' h% |
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4 vs 5
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8 _6 [' }& `6 v  H* X: {, _. S' Kif 4=5 6 is the fake one 1 n9 `7 o7 [- P& ]& `
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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
9 U  ]) g2 y) h* z3 R7 EGroup B: 5,6,7,8
8 h7 |- P" D. w3 h& T# M2 K" n9 uGroup C: 9,10,11,128 y4 p8 W2 ^( T. M+ n% e1 a
Group D: 13+ m1 e. }8 R" E2 `4 w. E- d
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Round 1
3 ^9 a! S2 [6 U% d% V5 N' o8 }4 DGroup A vs Group B! k' i9 b3 e; B6 d  v
如A and B一樣, 即較輕一粒在Group C or D
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# H( o7 J5 o7 c0 m# CRound 2
6 h4 S( X+ m  J2 u; A再在Group C拆成:/ {  x5 X: S$ b9 K
Group Ca: 9,10! E' Z3 `% O; f. w1 K# \6 S3 ^
Group Cb: 11,129 n3 ]* p% {, A: T  Y- z" f7 D
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, ) A8 |* r$ v' d, {7 E
要再秤, Round 3, 之後便知答案.% }( [' W% O9 r- J3 m5 h8 U

0 M: ~! a* T8 X0 ]  \e.g. #1 假設10為較輕的一粒6 M0 U8 h9 z" z6 b/ V/ h
Round 1
% z$ {7 d2 N" Q# T1,2,3,4 vs 5,6,7,8 = equal( E6 r; n- \$ m7 A5 c

; e, ^$ T! N3 S7 K4 x' `4 X4 XRound 2
( L! ~9 ], k) P$ P) e5 d+ r, O6 j9,10 vs 11,12 = 9,10 < 11,129 y* ^9 F, {/ D. f% o8 L% ?

5 b( ]  q. D4 _( A* \Round 3
' b5 S/ ]. X% F4 w/ z3 {* |6 C! b! H9 vs 10 = 9 > 10
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9 v, w. G/ Y( v. j. kThe answer is 10.0 R* {" M! G1 O0 Q8 r
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e.g. #2 假設7為較輕的一粒% ~8 j5 A( w- L0 \1 x# ?" q
Round 1
1 w' e: Z( H! d. O$ r1 x& I1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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. @) v: F/ U: t, c% qRound 2
4 A: U& {" \% u: y+ ?+ w" ]5,6 vs 7,8 = 5,6 > 7,8
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Round 3
$ ~! S0 y* @' T5 w  r* r8 f( t7 vs 8 = 7 < 81 Y: g1 h' A, T8 L( c
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The answer is 7.. q1 X( Y. t* ]! ~5 s$ g

" G7 a9 H+ W; _9 me.g. #3 假設13為較輕的一粒
( Z) e! U/ E2 o: K+ G- i! y* sRound 1
  b0 ]7 e& Q5 P% A1,2,3,4 vs 5,6,7,8 = equal
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9 h- l0 _% b1 j. @Round 2
+ l: A0 o, \2 {6 y9,10 vs 11,12 = equal) s2 g- }% L  D$ D# j6 [, A

6 t+ V: I2 Y" S+ JNo 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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[ 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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& x) Y0 b& b) O+ ^8 I# H! t* b$ S8 I) m1-6 vs 7-120 L7 A; ^6 ?6 }0 I
if 1-6 = 7-12     13 is fake" T7 Z/ m* H$ h! ?# p, O  h+ x

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2 n; ^* q1 }; [. X* M+ oWeight the 2 time
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6 Q5 n) l3 a6 W5 _* D) ^# FSuppose 1-6> 7-12
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+ x7 C& _' n4 C& M' s: ^; p& Q1-3 vs 4-6
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$ M1 A; P. j( [) ?Then Weight the Third
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) p. B& Y# @# w& l5 j5 I7 z7 \Suppose 4-6 > 1-3& s& x0 D$ V& L' N! A2 o
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Just like the first Step
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# H7 i* ]: \: S! v' H( [4 vs 5
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) u- i8 B5 r' v" c: w5 Sif 4=5 6 is the fake one ! _. l( X! l  ~2 w( M3 ]. t
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if 4>5  4 is the fake one
3 P: L& W9 R" jand so on......................

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問題第二步
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. V% u$ T0 T% GWeight 1:  1-6> 7-12) q: @( Q( w# q% F- b/ C- q
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Weight 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???6 M% l( D7 i; ^7 Z% z6 W
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問題第三步7 [  G* s" V  L$ \

7 K7 H6 E% |9 A1 q: I0 h8 NWeight 1:  1-6> 7-12
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! a$ A2 ]! M: ^" E$ CWeight 2:  4-6 > 1-3
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9 K# P* i! R  ?, Y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