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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- g0 X; H$ {5 ~# K『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)。7 e, }) c2 B1 g8 ^1 Q. B
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？』  r& |5 ^. W& e6 N

1 q9 P# [) a% R! q, k9 a* B3 U( R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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/ |! d3 d; ]) O! d2 G+ N( h2. 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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! z1 \; b9 f6 b! F8 `) G7 O: {[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 s( f+ e+ p" v+ G4 U4 B4 d0 `, C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,
# P4 y9 j. m0 n" x' p! u8 I7 s等我搵下仲在吾在" |( C* m1 _: U: ?7 D: D5 Y1 r0 |2 P

) H  m1 H9 x  c# i6 f當日用左37分鐘答１２粒波子，差７分鐘才合格。
- i) {6 H' U3 Q+ F! K  o13.........
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" g' G9 ^! j2 r! j[ 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,8 W5 ?" ?) S, {  k2 M
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:
% ~# _6 w1 g* T: B. w唔識隱藏...已經諗到..

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sor !!!....e加改左! i( R$ E$ P5 Z' u

! }$ X( @, H9 V& |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:; P" ?- \0 n3 |0 y: h: e9 d+ J3 u  {
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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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5 M, E+ p3 s; I1 p' nThanks

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. U4 r2 O, \& V, N0 p不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
, y6 p+ b$ ^0 ]1-6 vs 7-124 d' `- `0 Q; ^) p8 I# r  f
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-127 h) D5 Z+ N) e1 g  l& R. A3 e. ?
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1-3 vs 4-6 ! m& B- t5 V. O, {8 u

( J2 y" s. k0 R1 s+ {; pThen Weight the Third
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Suppose 4-6 > 1-3# s1 R. l1 X# p$ T2 `$ c; A' F1 {0 S
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Just like the first Step4 t; e. s9 U9 d' H# a
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4 vs 5
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if 4=5 6 is the fake one
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  W1 |' r; B$ u- I1 l7 k* G0 tif 4>5  4 is the fake one 7 i' q- T+ O+ M* O# d2 P

" V! T& {2 c! `$ A1 O  ^, Zand so on......................

hello1997

分3組4隻波子秤
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# Y) T( T; s0 |  L1 D. Y: M& dGroup A: 1,2,3,4
* j0 `- G) k& l' mGroup B: 5,6,7,8
) R4 T  p: O! K( SGroup C: 9,10,11,12
/ h$ ?* i8 e5 ]Group D: 13$ R1 X; E! b" O+ A; {; f
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Round 15 e: m: Q/ ]" _# r* s7 d7 n
Group A vs Group B
3 O5 z1 X8 n+ ?, u+ E3 u2 Y! P9 N如A and B一樣, 即較輕一粒在Group C or D% d0 g9 \" j8 F

5 ^8 }6 P* E3 u7 _& q9 u& ?Round 25 J# U' B) S8 z9 w( u. D. [
再在Group C拆成:
3 t* r+ U/ y6 {& W# MGroup Ca: 9,102 T3 T) g& M# S$ z% m
Group Cb: 11,12, Z' w- N) o: C3 ?5 `
然後再秤, 如一樣, 即13為較輕一粒.1 b+ ]' ~; K3 @3 L5 S$ W: v0 M3 [

# o% k. ?3 i" w! @如不同, 即較輕一組有一粒較輕波子在其中,
+ D$ [; V( `+ e8 {8 C要再秤, Round 3, 之後便知答案." a6 x) g2 L  V; o) C
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e.g. #1 假設10為較輕的一粒: @$ ~$ F8 C( j, c
Round 1
! E" |! s  z7 g8 z2 h4 }3 K* g* u1,2,3,4 vs 5,6,7,8 = equal) R3 n2 ?& ~3 l% x

6 l- |5 Y8 b" z. DRound 2, `. h3 t) ]+ F3 w, n; R
9,10 vs 11,12 = 9,10 < 11,125 x7 v- ?& @  P, w2 A2 ?
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Round 34 R( X2 ?( e' d8 {7 ?
9 vs 10 = 9 > 104 l5 J& J" d3 p* ~, z
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The answer is 10.! Q8 ]3 q1 @! Q9 A

" M; Z5 P- O: c# De.g. #2 假設7為較輕的一粒- c7 f- {) C4 h, y/ y2 j( n
Round 1
( H; M  F0 i7 a& V- @( V( d1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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1 R: z5 \: e4 v, l2 RRound 2; q4 I: N1 r! L2 }$ j* B4 _
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
6 }  U2 [7 e8 q3 T2 v7 vs 8 = 7 < 8. _4 N% o1 O3 k

  N9 j/ ?+ r: L$ n0 B" qThe answer is 7.
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e.g. #3 假設13為較輕的一粒( h. x7 g* [. f* a% G
Round 1
# `, V4 j" r6 L4 o, w1,2,3,4 vs 5,6,7,8 = equal7 {. s# v( w3 N+ \
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Round 2
7 p+ P) R4 a( ^% [) h9,10 vs 11,12 = equal
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No Round 3! O2 [* \" s, h

  M; c( S  x" ~- l6 B( JThe answer is 13.# x% O1 ?" O6 @3 f5 q7 N

7 H3 u4 @2 a1 v" [' R6 P唔知我答得正唔正確呢?! : z* E3 [1 R' L/ |# D- R9 Y

% V; |# N% w3 T8 `8 z[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:; S; ?( {8 i7 c/ j$ ~0 T
1.
1 G! @0 k' R/ t( k& {! B1-6 vs 7-12( D6 n6 Y% m5 e1 A
if 1-6 = 7-12     13 is fake0 y* |2 L2 k# c# T+ g

4 k: x7 ]$ R3 r6 u% Y$ _0 @if not
6 }9 |" l0 A( e
$ A0 a8 e) O* T1 N5 t  G7 fWeight the 2 time
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7 l+ X& }0 @" z& B7 ]8 v; ^+ oSuppose 1-6> 7-124 b4 E7 }% d4 x4 Y9 l

. e& c# ?4 l; G- X9 Q1-3 vs 4-6 4 P& V) j- x. j* ]& k2 ^

# v; n, I3 ^, d# `6 hThen Weight the Third
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Suppose 4-6 > 1-3
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2 D' a8 `. O9 o2 \* ]Just like the first Step
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0 Z5 t; Q& v- x4 vs 5
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$ `$ R$ V5 D4 e1 Hif 4=5 6 is the fake one
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" z: q  Y3 D# \$ D0 Q# @if 4>5  4 is the fake one : O/ I7 ~, M* W- i
and so on......................

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問題第二步2 w- Z+ T- p- I9 E' o, d
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Weight 1:  1-6> 7-12# t/ S) c1 W, Y# ?
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ F3 ^1 @  k0 d! h

/ n% H4 V. ^$ k* A+ u. G# E你第三步点去搵 7-12 边一粒???8 n9 _/ l& a7 I$ d$ l
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問題第三步) k7 u' z: y3 L$ \) F

1 d. D- z" ^3 uWeight 1:  1-6> 7-12
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) ~6 Y" m1 U8 a6 [: |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