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
- - - - -

The most productive year?


Best Answer nakulendu, 19 March 2013 - 10:00 AM

Spoiler for Perhaps it is

Go to the full post


  • Please log in to reply
3 replies to this topic

#1 bonanova

bonanova

    bonanova

  • Moderator
  • PipPipPipPip
  • 5313 posts
  • Gender:Male
  • Location:New York

Posted 18 March 2013 - 03:18 PM

Earlier this year I noticed that the date could be written as 1.13.13 [January 13, 2013] and

the day and month multiplied gave the year [modulo 100] Thirteen being both prime and

greater then the number of months, this is the only such date in 2013.

 

What year this century contains the most such dates?


  • 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#2 superprismatic

superprismatic

    Not just Prismatic

  • Moderator
  • PipPipPipPip
  • 1281 posts
  • Gender:Male

Posted 18 March 2013 - 07:04 PM

Spoiler for what I get


  • 0

#3 bonanova

bonanova

    bonanova

  • Moderator
  • PipPipPipPip
  • 5313 posts
  • Gender:Male
  • Location:New York

Posted 19 March 2013 - 03:54 AM

What I tried to convey by modulo 100 simply was 2013 becomes 13, which then is the straight product of 1 and 13.
Being prime and all that is not a requirement, just dates like 5/12/60.

You've opened up a richer set of possibilities, which I will now go back and work through.
Thanks.
  • 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#4 nakulendu

nakulendu

    Junior Member

  • Members
  • PipPip
  • 29 posts

Posted 19 March 2013 - 10:00 AM   Best Answer

Spoiler for Perhaps it is


  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users