Not really sure what this is about Mathematics Posted by louisedock on March 22, 2015March 22, 2015 Some have apparently done some calculations and come up with the fact that 25 years ago myself and others graduated from 9:th grade (which you can say is the equivalent of 8:th grade in the US). This makes it time for – reunion. Exciting. Share this:Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on Twitter (Opens in new window)Like this:Like Loading...