All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Numbers > Sequences
More Missing Numbers (Posted on 2003-08-06) Difficulty: 1 of 5
What are the next numbers in this sequence?

1,3,12,60,360,2520,...

See The Solution Submitted by Jonny Doe    
Rating: 2.0000 (10 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution Solution Comment 8 of 8 |

METHOD 1:

Let the ith sequence be denoted by T(i).
Then, by the conditions of the problem:
T(i+1) = (i+2)*T(i) and, consequently:
The required missing term:
T(6)
= 8*2520
= 20160

METHOD 2:
T(1) = 1; T(i) = i!/2; since 6>1, it follows that:
T(6) = 8!/2 = 20160


  Posted by K Sengupta on 2007-03-05 12:03:08
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (9)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information