From Tanya Khovanova’s Number Gossip we see that 2013 has the above properties; the various properties discussed here would make an interesting series of starters; I do not want to wait until 2019 to recommend a look at Happy Numbers – this has worked really well with students. 2013 is not prime – perhaps a chance to review divisibility tests.
Checking WolframAlpha for properties of 2013 we see that 2013 is bbb in base 13; work on number bases can provide ideas for starters or longer investigations. Nrich have combined happy numbers and base 8 in ‘Happy Octopus‘.
As is traditional for bloggers at this time of year – these are the Top 20 Posts of 2012.
The wonderful people at WordPress sent me an annual report for this blog, I quote:
‘19,000 people fit into the new Barclays Center to see Jay-Z perform. This blog was viewed about 120,000 times in 2012. If it were a concert at the Barclays Center, it would take about 6 sold-out performances for that many people to see it.’
So thank you so much for reading and wishing everyone a very happy 2013.