Go to navigation
It is currently Fri Dec 09, 2016 9:17 pm

All times are UTC




Post new topic Reply to topic  [ 4 posts ] 
Author Message
PostPosted: Thu Mar 24, 2016 5:30 am 
Offline

Joined: Sat Mar 05, 2016 4:30 pm
Posts: 17
Could someone please solve this. Find the next number in the following sequence :

1, 2, 6, 15, 31, -----

This from a sample paper my daughter's friemd had.


Top
 Profile  
 
PostPosted: Thu Mar 24, 2016 5:41 am 
Offline

Joined: Sun Sep 07, 2014 1:47 pm
Posts: 2604
Shwetakd wrote:
Could someone please solve this. Find the next number in the following sequence :

1, 2, 6, 15, 31, -----

This from a sample paper my daughter's friemd had.



The answer is 56.Each time the number squared is added.Initially it was the square of one which is 1 then the square of 2 which is 4 then the square of 3 which is 9.Then the square of 4 which is 16 and finally the square of 5 which is 25 added to 31 to make 56.

_________________
In the end, it's not the years in your life that count. It's the life in your years.

Abraham Lincoln


Top
 Profile  
 
PostPosted: Thu Mar 24, 2016 8:28 am 
Offline

Joined: Sat Mar 05, 2016 4:30 pm
Posts: 17
Thank you!


Top
 Profile  
 
PostPosted: Thu Mar 24, 2016 10:10 am 
Offline

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11954
It is usually a good approach to look at the 'gaps' or differences between successive terms.

1, 2, 6, 15, 31

2 - 1 = 1
6 - 2 = 4
15 - 6 = 9

etc.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 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 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