It is currently Sat Jan 20, 2018 1:42 am

 All times are UTC

 Page 1 of 1 [ 8 posts ]
 Print view Previous topic | Next topic
Author Message
 Post subject: need explanationPosted: Tue Aug 27, 2013 12:16 pm

Joined: Thu Jun 14, 2012 8:51 pm
Posts: 26
Letts Paper C Question 53
TT Paper 11 Question 54

Top

 Post subject: Re: need explanationPosted: Tue Aug 27, 2013 12:32 pm

Joined: Mon Jan 30, 2006 4:07 pm
Posts: 2668
It would be helpful if you write out the question.

Patricia

Top

 Post subject: Re: need explanationPosted: Tue Aug 27, 2013 1:01 pm

Joined: Mon Mar 15, 2010 2:45 pm
Posts: 5429

Top

 Post subject: Re: need explanationPosted: Tue Aug 27, 2013 6:02 pm

Joined: Sat Jan 12, 2013 10:02 pm
Posts: 88
kavitag wrote:
Letts Paper C Question 53
TT Paper 11 Question 54

Letts, Test C - Q53:

First of all there are two seperate sequences going on in this question.

66, 1, 61, 2, 51, 4, ?

I wasn't entirely sure because I thought the answer could be be 36 as well. However I do think I have an explanation for why the answer is 31 as given in the answer booklet.

1st Sequence - 66, 61, 51:

*Main pattern:

66 - 5 = 61
61 - 10 = 51
51 - 20 = 31

*Pattern within the difference

-5 x 2 = -10
-10 x 2 = -20

I thought the pattern initially was -5, -10, -15 which is how I got 36 the first time round. But I guess first you have to work out the difference and then find another pattern within the difference.

2nd Sequence - 1, 2, 4:

*Main pattern:

1 + 1 = 2
2 + 2 = 4
4 + 4 = 8

*Pattern within the difference:

+1 x 2 = 2
+2 x 2 = 4

I think this indicates that you had to multiply the difference by two in the first sequence? I'm not too sure sorry.

Top

 Post subject: Re: need explanationPosted: Tue Aug 27, 2013 8:37 pm

Joined: Thu Jun 14, 2012 8:51 pm
Posts: 26
Thx a lot... I got it u r right with the first explanation.

Top

 Post subject: Re: need explanationPosted: Tue Aug 27, 2013 8:51 pm

Joined: Thu Jun 14, 2012 8:51 pm
Posts: 26
( 15 [ 18 ] 9 ) ( 17 [ 39 ] 4 )

( 20 [ ? ] 9 )

Ans is : 33 Dont know how?

Top

 Post subject: Re: need explanationPosted: Tue Aug 27, 2013 8:55 pm

Joined: Wed Jan 18, 2012 11:41 am
Posts: 6854
Location: Essex
kavitag wrote:
( 15 [ 18 ] 9 ) ( 17 [ 39 ] 4 )

( 20 [ ? ] 9 )

Ans is : 33 Dont know how?

Middle number is (1st no - 2nd no)*3 i.e.20 - 9 =11; x3 = 33

_________________
Outside of a dog, a book is a man's best friend. Inside of a dog it's too dark to read.Groucho Marx

Top

 Post subject: Re: need explanationPosted: Wed Aug 28, 2013 10:09 am

Joined: Thu Jun 14, 2012 8:51 pm
Posts: 26

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Page 1 of 1 [ 8 posts ]

 All times are UTC

#### Who is online

Users browsing this forum: No registered users and 2 guests

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum

Search for:
 Jump to:  Select a forum ------------------ FORUM RULES    Forum Rules and FAQs 11 PLUS SUBJECTS    VERBAL REASONING    MATHS    ENGLISH    NON-VERBAL REASONING    CEM 11 Plus GENERAL    GENERAL 11 PLUS TOPICS    11 PLUS APPEALS    11 PLUS TUTORS    INDEPENDENT SCHOOLS    11 PLUS CDs/SOFTWARE    11 PLUS TIPS    PRIMARY    SEN and the 11 PLUS    EVERYTHING ELSE .... 11 PLUS REGIONS    Berkshire    Bexley and Bromley    Birmingham, Walsall, Wolverhampton and Wrekin    Buckinghamshire    Devon    Dorset    Essex    Essex - Redbridge    Gloucestershire    Hertfordshire (South West)    Hertfordshire (Other and North London)    Kent    Lancashire & Cumbria    Lincolnshire    Medway    Northern Ireland    Surrey (Sutton, Kingston and Wandsworth)    Trafford    Warwickshire    Wiltshire    Wirral    Yorkshire BEYOND 11 PLUS    Beyond 11 Plus - General    GCSEs    6th Form    University