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Answer 3 questions that were unanswered for more than 30 days
Awarded to David Hill on 11 Jan 2021
Contribute at least one answer each month for 12 consecutive months
Awarded to David Hill on 02 Aug 2020
Reach 1500 reputation points
Awarded to David Hill on 19 Jun 2020
Solve all the problems in Number Manipulation II problem group
Awarded to David Hill on 06 Apr 2021
Solve all the problems in Draw Letters problem group
Awarded to David Hill on 03 Apr 2021
Solve all the problems in Cody Problems in Japanese problem group
Awarded to David Hill on 10 Mar 2021
Your submissions received 5 five star ratings
Awarded to David Hill on 16 Sep 2020
Your submissions were downloaded 100 or more times in a month
Awarded to David Hill on 03 Mar 2020
Publish your first comment or rating
Awarded to David Hill on 09 Oct 2019
Solve all the problems in Cody Challenge
Awarded to David Hill on 24 Feb 2021
Solve all the problems in Computation Geometry I
Receive 25 likes on a problem you have created
Awarded to David Hill on 09 Nov 2020
Solve all the problems in Matrix Manipulation I
Awarded to David Hill on 30 Oct 2020
Solve all the problems in Indexing II
Awarded to David Hill on 19 Mar 2020
Solve all the problems in Sequences & Series III
Awarded to David Hill on 14 Feb 2020
100 of your answers have been accepted
Awarded to David Hill on 16 Jan 2020
Provide your first answer ever to someone else's question
Awarded to David Hill on 20 Jun 2019
Comment on a problem or solution
Awarded to David Hill on 22 Nov 2017
Solve a problem for the first time
Awarded to David Hill on 19 Nov 2017
Solve 500 problems
Awarded to David Hill on 11 Oct 2019
Solve a problem with a best solution
Awarded to David Hill on 24 Aug 2019
Be the first to solve a problem
Awarded to David Hill on 15 Jan 2018
Create a problem
Awarded to David Hill on 26 Aug 2019
Create 10 problems
Awarded to David Hill on 20 Oct 2019
Solve all the problems in ASEE Challenge
Awarded to David Hill on 07 Jan 2018
Solve all the problems in Card Games
Awarded to David Hill on 24 Jul 2019
Solve all the problems in Computation Geometry II
Awarded to David Hill on 16 Aug 2019
Solve all the problems in CUP Challenge
Awarded to David Hill on 03 Dec 2017
Solve all the problems in Divisible by x
Awarded to David Hill on 22 Feb 2018
Solve all the problems in Functions I
Awarded to David Hill on 04 May 2018
Solve all the problems in Indexing I
Awarded to David Hill on 27 Nov 2018
Solve all the problems in Number Manipulation I problem group
Awarded to David Hill on 15 Nov 2018
Solve all the problems in Sequences & Series I
Awarded to David Hill on 19 Dec 2018
Solve all the problems in Tiles Challenge
Awarded to David Hill on 11 Oct 2018
Solve all the problems in Magic Numbers II
Awarded to David Hill on 12 Oct 2018
Solve a community group
Awarded to David Hill on 22 May 2019
Solve Project Euler problems using Matlab
Awarded to David Hill on 10 Oct 2018
Solve all the problems in Introduction to MATLAB problem group
Awarded to David Hill on 24 May 2019
Publish your first submission
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