Abdullah Ibrahim
Monday Open Thread; October 9 is World Post Day
Submitted by enhydra lutris on Mon, 10/09/2017 - 5:00am![](https://farm2.staticflickr.com/1493/26212496565_b2b949e0a3.jpg)
October 9th is the 283rd day of the year. There are 83 days left. What symmetry.
Today's number is 9
9 is the largest single digit integer
9 is the square of a prime and is the second lowest such square