Go to navigation
It is currently Thu Dec 08, 2016 12:12 am

All times are UTC




Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Help Pls
PostPosted: Tue Sep 04, 2012 12:58 pm 
Offline

Joined: Fri Jun 22, 2012 11:45 pm
Posts: 19
Pls how do I solve these questions from Manchester Grammar School 2005.

Q38) One year, September 1st fell on a Friday. What was the next month which started on a Friday?

Q39) In the sequence of numbers 1, 2, 4, 8, 16, 32 .......what would be the answer if you divided the 20th number by the 17th number in this sequence?


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Tue Sep 04, 2012 1:15 pm 
Offline

Joined: Fri Sep 15, 2006 8:51 am
Posts: 8113
Cozen wrote:
Pls how do I solve these questions from Manchester Grammar School 2005.

Q38) One year, September 1st fell on a Friday. What was the next month which started on a Friday?



December ... not sure what you do if you work it out !! but Sept and Dec always start on the same day of the week.

Quote:
Q39) In the sequence of numbers 1, 2, 4, 8, 16, 32 .......what would be the answer if you divided the 20th number by the 17th number in this sequence?


Answer is 8 ... the sequence doubles each time, so the 18th divide by 17th would be 2 19th by 17th would 4 and 20th by 17th would be 8...


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Tue Sep 04, 2012 1:29 pm 
Offline

Joined: Fri Jun 22, 2012 11:45 pm
Posts: 19
Thanks alot. I sometimes complicate things. thought DS needed to solve Q39 by finding the "nth term".


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Tue Sep 04, 2012 1:34 pm 
Offline

Joined: Mon Aug 22, 2011 8:20 pm
Posts: 1706
Location: Warwickshire
Cozen wrote:
Q38) One year, September 1st fell on a Friday. What was the next month which started on a Friday?
September = 30 days Divisible by 7 - NO
September+October = 61 days Divisible by 7 - NO
September+October+November = 91 days Divisible by 7 - YES

The next month is December.


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Tue Sep 04, 2012 4:24 pm 
Offline

Joined: Fri Oct 12, 2007 12:42 pm
Posts: 3813
Location: Chelmsford and pleased
The easiest worhrd solution to the first problem is to look at remainders after taking off four weeks.

September 2 days
October 3 days
November 2 days
This makes the extra week needed.


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Tue Sep 04, 2012 5:18 pm 
Offline

Joined: Thu May 10, 2012 8:30 am
Posts: 247
Cozen wrote:
Thanks alot. I sometimes complicate things. thought DS needed to solve Q39 by finding the "nth term".


1048576 / 131072 = 8 might be a bit tedious to do by hand.


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Tue Sep 04, 2012 5:49 pm 
Offline

Joined: Fri Sep 15, 2006 8:51 am
Posts: 8113
daveg wrote:
Cozen wrote:
Thanks alot. I sometimes complicate things. thought DS needed to solve Q39 by finding the "nth term".


1048576 / 131072 = 8 might be a bit tedious to do by hand.


you don't need to do such a sum as it is the relationship between any number in the series and the next or any subsequent numbers. Get the same answer if you look at the 80th divided by the 77th.


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Sat Sep 08, 2012 2:07 pm 
Offline

Joined: Sat Sep 08, 2012 10:41 am
Posts: 7
nth term is 2^(n-1) therefore

20th term is 2^19
17th term is 2^16

2^19 / 2^16 = 2^(19-16) = 2^3 = 8


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Fri Sep 28, 2012 4:56 pm 
Offline

Joined: Sat Dec 10, 2011 4:47 pm
Posts: 103
Can anyone explain how to work out Q12??


Top
 Profile  
 
 Post subject: Re: Help Pls
PostPosted: Fri Sep 28, 2012 4:58 pm 
Offline

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11949
What is the question?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next

All times are UTC


Who is online

Users browsing this forum: No registered users and 4 guests


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

Search for:
Jump to:  
CALL 020 8204 5060
   
Privacy Policy | Refund Policy | Disclaimer | Copyright © 2004 – 2016