18

Open Thread for July 18, 2016; Nelson Mandela International Day

July 18 is the 199th day of the year. There are 166 days left.

18 is a multiple of 9, 3, and 6, leading to suspicions that it will generate unending fractions (more later)

18 is the sum of 3 of its divisors, 3, 6, and 9
18 is argon, a noble gas
18 is the group containing noble (inert) gases in the periodic table

Open Thread for April 18, 2016


Open Thread for April 18, 2016 - Happy Nevsky.

Today we celebrate Alexander Nevsky's defeat of the Crusaders & Teutonic Knights, but more on that later.

It is April 18, so today's number is 18
18 is a multiple of 9, 3, and 6, leading to suspicions that it will generate unending fractions (more later)