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6 L9 x8 e5 T6 i/ ]1 r6 X7 V& x: Y
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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)。- X/ ~, L; ~5 ?
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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5 w" W( N( A/ ?% ^; U: X$ b3 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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( d  G" h+ U4 f9 N2. 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:
% [7 ~5 d" l& O7 \. X% W1 N5 ^5 V6 P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,
' f+ `% O8 p6 V* q6 G等我搵下仲在吾在4 I  O. D# q$ D
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當日用左37分鐘答１２粒波子，差７分鐘才合格。2 W+ c4 E# @0 Q, r9 n4 O' w
13.........3 i" C5 |2 c/ i* k9 S

; T0 Y  X: w! u6 w[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:5 l( A& S) {/ v) P1 Q" G2 _! t1 j2 v8 k
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我以前畫左個chart去答,
& s+ T7 N8 v9 Z0 z1 _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:
# {# m. T5 r: _& w4 M9 g9 h! _; J唔識隱藏...已經諗到..

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sor !!!....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:" T9 o3 G, |8 n! U: B* F" k
相信e條題目都有吾少人玩...

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# p3 y; U5 S7 D8 Z8 m0 a/ c7 dPlayPlay, 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:
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4 d! ^2 @; I9 F4 fPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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6 Q' ?8 b, X# d6 y  fThanks

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5 G# N1 V! V1 ~: F6 {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
' v1 S! L2 X7 n) Iif 1-6 = 7-12     13 is fake2 B) X8 @+ x' ?. v% k- M8 D; U
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if not
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3 M1 M* e2 a; W$ C) V! KWeight the 2 time : |4 Q' Q& V2 n+ t
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Suppose 1-6> 7-12
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1-3 vs 4-6
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1 m4 A% M4 V1 l0 A  fThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step' d3 A, q3 L7 P* U0 ]3 m
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4 vs 5
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) L, G  t* v7 qif 4=5 6 is the fake one 2 \( A9 V+ ^6 M; Z+ b
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if 4>5  4 is the fake one
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( m: Z# y, O5 Z: W! t! y5 Wand so on......................

hello1997

分3組4隻波子秤1 n; S7 V! D+ @) u
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Group A: 1,2,3,4
6 R+ [+ p7 f3 I7 O8 G/ sGroup B: 5,6,7,8
$ L+ B; Z$ s6 `& B4 fGroup C: 9,10,11,12$ r! J) h) |3 a. S
Group D: 13. \5 D; z6 C' k6 b; N! R/ _
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Round 1; ^- P, I8 Z' `) k2 |6 [
Group A vs Group B
0 R0 q) ^& a8 |7 _! m6 w如A and B一樣, 即較輕一粒在Group C or D, {! ?- R$ b, T: J$ o7 l! ~
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Round 27 Y3 n9 U0 z; T3 V& \' M
再在Group C拆成:
' F0 Z. b3 Z  i- }4 IGroup Ca: 9,109 k9 y- v* Q! a0 V/ ~
Group Cb: 11,12) L- I  N8 r5 |2 z
然後再秤, 如一樣, 即13為較輕一粒.
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$ ?8 h) @2 B# l: y, R如不同, 即較輕一組有一粒較輕波子在其中,
" a8 ~+ L; m6 L* D要再秤, Round 3, 之後便知答案.8 P7 v; N; J+ q" i6 O
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e.g. #1 假設10為較輕的一粒8 [# B0 J% h; V- E9 Y8 }" e  b
Round 1! W7 m( b8 O9 W% L" p% ~
1,2,3,4 vs 5,6,7,8 = equal9 l! l" ]6 }+ T# O( j1 v
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Round 2% U2 {3 u) z# ^/ Q" l; @( _
9,10 vs 11,12 = 9,10 < 11,12  C! u8 M2 k  R+ d9 O6 t3 o6 i5 X

9 |, \- ]! I6 D- qRound 3
5 a) F  ]+ I4 b* X% @: o& M9 vs 10 = 9 > 10
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  |. |: D7 k4 z. `The answer is 10.
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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- c1 ?' W& V% h. S) \8 y) U  \% tRound 2- e0 m- \+ T) d, i+ Z
5,6 vs 7,8 = 5,6 > 7,8
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7 o6 c# K; p3 r2 ~Round 3
! H' f% c! T" J+ m2 `: Z3 T7 vs 8 = 7 < 8) [7 x" Q+ l) |0 g! h9 J

- {. P3 \) C4 u1 s* ?) w: |The answer is 7.
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e.g. #3 假設13為較輕的一粒7 s7 G% C2 B. I8 K3 X$ y( k
Round 1* s0 l1 Z0 n6 Z3 Y. x
1,2,3,4 vs 5,6,7,8 = equal  s: i* H0 U& d/ Y
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Round 2
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7 _8 f* {( b2 T+ oNo 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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# J& @4 s$ g' D' m5 o% Y) y[ 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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3 A/ n  W, i5 c6 b) _0 i3 n1-6 vs 7-12$ h6 M; b  n' Q4 F
if 1-6 = 7-12     13 is fake8 k# j# W. @6 ]

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! e& l: G* f- t$ z8 v' B4 ^* oWeight the 2 time 9 W9 Z. J( _0 S* C9 Y$ i
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Suppose 1-6> 7-12! K9 y( b% Y* @
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1-3 vs 4-6
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Then Weight the Third
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& K9 w2 O9 W, b0 r2 A3 q0 r: eSuppose 4-6 > 1-3
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Just like the first Step( w7 f4 N2 G% ]( o& R9 h! B1 \

8 R& L% G9 l: A0 u4 vs 5
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if 4=5 6 is the fake one
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2 {) R# ^8 [# l2 ~if 4>5  4 is the fake one
3 n; L& r, Z: |# aand so on......................

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問題第二步
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Weight 1:  1-6> 7-120 {" |, N& Z% J. _' n: g0 C

; W* [6 C; c' V$ h* V2 \! ~. I' @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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問題第三步) u% I& \1 I+ J

9 y( m& m  \0 {/ g5 TWeight 1:  1-6> 7-126 e4 ?5 Y; {* j
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Weight 2:  4-6 > 1-3
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6 U/ ]  v7 P7 z2 d* {4 N2 |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