Answer 10 questions that were unanswered for more than 30 days
Awarded to per isakson on 12 Jun 2019
Solve a problem with a best solution
Awarded to per isakson on 05 Mar 2017
Be the first to solve a problem
Awarded to per isakson on 17 May 2012
Your submissions were downloaded 30 or more times in a month
Awarded to per isakson on 01 Nov 2019
Your submission is selected as "Pick of The Week"
Awarded to per isakson on 09 Oct 2019
Publish your first review
Awarded to per isakson on 09 Oct 2019
Your submissions received 10 five star ratings
Awarded to per isakson on 09 Oct 2019
Publish your first submission
Awarded to per isakson on 09 Oct 2019
Contribute at least one answer each month for 36 consecutive months
Awarded to per isakson on 20 Jul 2017
Accept 20 answers given by other contributors
Awarded to per isakson on 20 Jul 2017
100 of your answers have been accepted
Awarded to per isakson on 20 Jul 2017
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