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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* K* v  D5 S- Q/ N: m9 e9 |* ^『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)。
9 d+ }  n1 [; H7 l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: 9 W& Z5 L( W' J$ Q, e

& i4 N0 I2 x& }" i8 S9 s/ l: g1 W1. 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8 ~' V' y9 ]3 {
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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2 R3 f8 G) r! h& G) l

% d1 [$ i6 C* z8 y* c. l[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:5 L, h" A& h% M
相信e條題目都有吾少人玩...

/ K6 f1 [. r$ n我以前畫左個chart去答,
4 L: W8 O! [& k/ T1 Z1 U  H0 b等我搵下仲在吾在7 I0 ^( y* p: {- i  |; q
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當日用左37分鐘答１２粒波子，差７分鐘才合格。" f/ A( |. \# T1 U3 o# l* P
13.........
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9 f' R* G8 l( k' i[ 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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. m( U" s  D. N7 V! n我以前畫左個chart去答,
8 ^1 T6 l7 h" @" j8 }2 g7 ]& K等我搵下...

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: i  k$ o5 l; }. t% d' H, \! \3 E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:! l3 ]) E: X& S4 T
唔識隱藏...已經諗到..

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( H8 v# ]) }; B9 I- K1 g
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:% e- a# a9 ]8 F' {
相信e條題目都有吾少人玩...

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# n" y# C' z5 D7 rPlayPlay, Let me know later who has the right answer and I will add points accordingly./ x4 J9 ?1 w- ]& I5 e: w

( q0 ^5 j( p( ~  ^Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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$ L# l5 E; E5 OPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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) l1 c/ r' k8 P$ B$ t% |+ U9 B: X- dThanks

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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 }) B, |, u" @, f
1-6 vs 7-120 I2 B/ \4 h0 r  S0 X/ ?  P4 [
if 1-6 = 7-12     13 is fake4 C3 [7 M) Y7 `3 Q* B3 o& |* C
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if not
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1 N2 c1 e" O  U/ d9 u5 S4 cWeight the 2 time
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. h3 O2 ^% w7 @3 y1 N9 q8 oSuppose 1-6> 7-12
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9 f) J3 X2 a! V6 A* @+ q  G1-3 vs 4-6 : x" y3 }3 I# O! a4 i1 O9 i# E

  c$ y7 {7 t8 d3 o$ Q5 z% GThen Weight the Third) w7 S' j7 B) u5 h% T& v
3.9 H. ]( O- M1 {" }- ]6 [% p; x. I
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Suppose 4-6 > 1-3
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+ M2 J: O0 h) x6 X8 U4 ~Just like the first Step( k3 u' f1 t# M: @9 m0 L
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4 vs 5 $ N7 ^) J( d5 Q9 }
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if 4=5 6 is the fake one + f: t- P1 h; |8 F9 Q% s
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if 4>5  4 is the fake one # Z+ k/ v7 c1 n9 H% a- C- m, o

( r( Y, N( _- ~: G% D" t' oand so on......................

hello1997

分3組4隻波子秤: _2 Q+ V8 t( r

$ q$ f8 {5 ]4 A3 N  }* ^7 {Group A: 1,2,3,4
" r+ `/ ~2 R3 @- z, V# }* \# GGroup B: 5,6,7,8
* f( f9 q* @4 q" _& R7 `Group C: 9,10,11,12
* O2 V. c/ A( PGroup D: 13( [1 Q/ L( q1 v9 |/ d6 U

8 r+ s& u; r8 G* [* z- X6 m' IRound 1! Q: j9 I! e) x" u% [. U5 F
Group A vs Group B! @; c+ V: J7 s4 u5 K4 _
如A and B一樣, 即較輕一粒在Group C or D
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Round 28 p/ @5 V4 o/ F+ ]- z. {, j
再在Group C拆成:
$ a( D3 s; ~, lGroup Ca: 9,10
' H- _. S/ z# ]. r( \Group Cb: 11,12
% i# E  q; y7 R* ?6 N3 s( `然後再秤, 如一樣, 即13為較輕一粒.: W% n) L# [& }. V6 n( J3 M

2 i# X$ x* k, t6 w9 M. C- P0 |如不同, 即較輕一組有一粒較輕波子在其中, 8 J5 |* c" Y$ D2 m, T! p
要再秤, Round 3, 之後便知答案.% O3 r8 x1 h9 Q4 u5 I2 x- h' u

1 k0 ^9 n( Y2 C; Fe.g. #1 假設10為較輕的一粒
% P2 O# s+ y( V, m5 l( J8 @Round 1
6 B) \7 |0 f. X1,2,3,4 vs 5,6,7,8 = equal
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Round 2
! A" k2 j  ~) I9 m9,10 vs 11,12 = 9,10 < 11,12
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( ]6 m" B+ ^1 A/ }0 P0 [. R% J/ w% b# xRound 3
3 X" A0 E) Z! a$ d  n1 I; f9 vs 10 = 9 > 10
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. g6 N. J$ p/ _$ f# {0 x. sThe answer is 10.( m; K6 P( g. _: _* K) i( j
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e.g. #2 假設7為較輕的一粒2 ?( n: E1 t+ r
Round 1
6 y2 s! t" x* }/ e  t; K- @1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ x; P9 [) O1 b+ Q

$ r  O' J0 `' g0 {1 h: L2 qRound 2
, p3 w: T6 C1 v0 `; X% R5,6 vs 7,8 = 5,6 > 7,8
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Round 3
4 v8 }+ M+ _! ~3 u0 [' q' a* P7 vs 8 = 7 < 8
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The answer is 7.1 Q% R. e) n  {: I
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e.g. #3 假設13為較輕的一粒: b8 n& q2 u/ X( \5 [8 f% J
Round 1' d* A0 J/ @. c) y; x% Q9 B
1,2,3,4 vs 5,6,7,8 = equal3 b( U( }& H3 J0 n% U
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Round 2
. g, G2 I; H) _  t* K9,10 vs 11,12 = equal2 ?! R5 ^- ~6 }; y& y; T" @. b; z
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No Round 37 \! h2 _# A  _! @' Y$ ?
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The answer is 13.- b  f- M) N' D7 U

  ?6 K# j# O/ U! x/ R唔知我答得正唔正確呢?!
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& t9 Q) A8 i! N  [2 b[ 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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1-6 vs 7-12' H/ A0 V, r, m
if 1-6 = 7-12     13 is fake
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if not
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6 A* w6 O9 z' UWeight the 2 time
3 ^3 x9 ^  e) r) h7 y, G2 ~9 h8 W) b. p" G+ I( q& y* C
Suppose 1-6> 7-12- [2 h2 a' ]% G5 Q' f' Y$ f# U8 r
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1-3 vs 4-6
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Then Weight the Third+ Q5 I9 i, R0 \& D. L9 w
3.
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7 ]' z/ d/ S2 i& D" i1 kSuppose 4-6 > 1-3
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( T7 r5 ?* a( O6 NJust like the first Step7 c: q+ O' ?3 d7 F- r5 }
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4 vs 5 ) D$ `" w1 M+ c% A

1 }0 \1 P* v% N4 ~+ s& Bif 4=5 6 is the fake one 1 `% \' W  F4 u

8 f9 l3 `. j! w$ {8 [if 4>5  4 is the fake one
4 |. k$ m- p1 p" Dand so on......................

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% ^5 I4 c1 k7 Z* ?! h3 S問題第二步  v: w% y# D8 j2 f  e

& q  I: E5 l( [! I  k. o7 xWeight 1:  1-6> 7-12& D. n; O) z+ j" {
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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" C1 o' Y4 v7 e, N8 S) V你第三步点去搵 7-12 边一粒???6 n& D8 [& E" z# y) F+ T3 M

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6 j% `3 r" w7 I' n' Y* s問題第三步
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/ z+ J! c& c: `5 JWeight 1:  1-6> 7-12+ F9 ?- i/ u! t" F' u' [
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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