Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -


  • Please log in to reply
1 reply to this topic

#1 rhapsodize

rhapsodize

    Advanced Member

  • Members
  • PipPipPip
  • 274 posts

Posted 05 April 2008 - 04:49 PM

Part A may be too easy, but hopefully part B and C will be somewhat challenging...

A) What is the 9th and 10th number in this infinite sequence?

1,2,6,12,60,60,420,840,....


Spoiler for Part B (do not look at unless you solved part A or need an indirect hint).


C) As you can tell from both of the last two parts, numbers sometimes repeat. What 5 spots in this sequence are the first 5 that have the same number repeating (hint: it's actually the same 6 numbers in a row)? Better yet, how can you figure this out besides just figuring out the pattern and writing it forever? Better yet, what is that number?
  • 0

#2 rhapsodize

rhapsodize

    Advanced Member

  • Members
  • PipPipPip
  • 274 posts

Posted 07 April 2008 - 04:52 PM

Replying to my own post (hoping someone will try it out...)
  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users