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* ~9 W6 t% K# ]' ~( w! b3 s' L) L
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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)。8 c6 ?# i  Q, E
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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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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5 |& R+ ^. a6 H* B' u# ]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; a- I1 X) M" Q8 k
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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:: w/ o4 v7 l7 w# a$ g& ?
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,
) M  ^4 M9 v/ k: A5 v3 _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。
0 k. j7 J4 U- q9 D' \13.........& Z4 l( s4 J: k" L
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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:
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我以前畫左個chart去答,) S5 p, b! l0 @
等我搵下...

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  j9 y, o- w& ]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:
9 `# a3 ]/ \2 w2 V" p+ f/ X唔識隱藏...已經諗到..

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sor !!!....e加改左
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4 S/ R# y2 V7 j, X. k! s, V3 `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:
$ g. {: y7 x9 Y9 r5 t' S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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7 h! x9 C9 e$ _7 @. B7 L+ |Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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, p3 P+ R6 X% g, i" F# tPlayPlay, Let me know later who has the right answer and I will add points accordingly./ F- e4 t9 D  R& ]% J% _. D3 J8 g

+ ]- D7 u4 ?, q' c# T$ q9 c; d2 ]. PThanks

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3 W& _1 ?; h/ a$ M$ w5 X# d# y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 7-120 L& N' w2 V" {1 r/ N% o
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-12! q  J0 V/ R1 M

, F3 d! k; J, k1-3 vs 4-6
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$ k/ F$ r# V: `: c  VThen Weight the Third, l% S% o& B! T. @3 L% {2 B0 n5 |
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Suppose 4-6 > 1-37 r2 A( p& t6 l3 k4 R; d( C

7 x% X: l5 O8 Q  n3 {2 C9 dJust like the first Step
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; M+ h& o1 T2 S' Z4 vs 5 3 U2 S5 _  m, C: x; a) o" q- R8 h

2 Z) f$ ^2 B% E' xif 4=5 6 is the fake one % |) F" z" n* T2 t5 _: 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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0 `8 L8 a: |% A; P0 a: [% DGroup A: 1,2,3,4
! S8 `# P# n: Q" {6 g" H# SGroup B: 5,6,7,8
1 ^( ^0 W1 M; {1 a  ]) \Group C: 9,10,11,12% o. J# A# v) e% q% Y. [8 M
Group D: 13, s3 W2 i) k8 M( d! b, m: J2 I

3 c+ ^* D4 b4 u/ }% a" G0 r; y8 eRound 11 f- I/ T/ Z- B4 Z
Group A vs Group B, V0 C  y9 Y1 R6 {
如A and B一樣, 即較輕一粒在Group C or D
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: d" W3 c) y. l/ }% @Round 2( V2 x; O  C1 }3 `+ X4 w" S
再在Group C拆成:
% M. M* \! q" o. z' gGroup Ca: 9,10) s9 e9 q! S9 y" h( w
Group Cb: 11,12
) a3 w2 n5 R- A, Z& N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, ; F  e" B/ N" d5 t' |% y. z3 w
要再秤, Round 3, 之後便知答案.4 O1 K0 B& p% R; h7 S# O$ t. U
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e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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* ?5 C* Q( B9 _& c) URound 2
. `2 x4 s# m+ f/ D3 z  s' `9,10 vs 11,12 = 9,10 < 11,128 J4 S8 t* n: G9 x6 e9 s) v# y
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Round 3# e: Z2 [# {2 O" R; h! r
9 vs 10 = 9 > 10
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The answer is 10.
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8 M/ H- E- s- c* S5 J* q4 ~e.g. #2 假設7為較輕的一粒" ]6 q; r  u2 q+ Q2 X' Y# e
Round 13 x" W# Z7 h% B; ^) A1 b
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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7 U$ i: R/ ]8 Q( ?2 l( IRound 2
9 A: p; M, c5 X- F, H2 F7 N8 x$ |5,6 vs 7,8 = 5,6 > 7,8
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Round 30 [9 H$ p) q7 |- v7 B
7 vs 8 = 7 < 89 n( q7 O% U1 y& j6 y

9 q$ ?, q$ Z- O: \2 XThe answer is 7.8 w7 z6 S- w* a3 k

/ E4 p1 {9 Y( }& @! Ke.g. #3 假設13為較輕的一粒5 l* z; ]4 H$ O# H$ T
Round 1
4 n  y$ I5 M4 ?3 K/ Y3 i/ R1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( V- m# s& m* k# _9,10 vs 11,12 = equal
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3 s% F& B$ H- s# QNo Round 3
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3 B9 X$ ?/ k! \, HThe answer is 13.
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( c) b# h! S4 Y- \/ u' e唔知我答得正唔正確呢?!
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5 l, D$ I$ _) U; t[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:/ M- d$ S# d. F  u4 `  y" C1 O
1.
( E1 W' J9 C9 o+ n! f7 `1-6 vs 7-120 d0 a! G  L: M" ?
if 1-6 = 7-12     13 is fake! g9 F7 L: i1 ]9 o

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Weight the 2 time
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, l' p- T% V/ WSuppose 1-6> 7-12
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( @/ k2 o1 o' ]* @7 p5 {% O/ r8 H1-3 vs 4-6 2 v  q0 I# O9 M# d( t6 T) [. w

& G5 n$ _& U: r7 kThen Weight the Third
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Suppose 4-6 > 1-3# v# t- U  H) z$ O( {  I# g$ e7 P

& H1 w( h) H( wJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one 7 y! ^6 x% S) m/ e6 `

  n5 ?( {& b; z. Y( ~( R9 [if 4>5  4 is the fake one
  c) J" k& s7 ~9 _and so on......................

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問題第二步7 m$ k% V$ ?# K: F
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Weight 1:  1-6> 7-12
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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???
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========================================
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- K/ H( W  z. L; G; ?) w3 U問題第三步
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Weight 1:  1-6> 7-12* j4 I  ?+ D$ y& f. i5 v
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Weight 2:  4-6 > 1-3
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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