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Earned on 13 Apr 2012 for solving Problem 470. Scoring for oriented dominoes.
Earned on 28 Nov 2012 for commenting on Solution 169456.
Earned on 18 Jun 2013 for liking Problem 141. Solve the Sudoku Row.
Create a problem.
Solve a problem first.
Earned on 10 Jan 2014 for solving all the problems in CUP Challenge.
Earned on 12 Mar 2013 for submitting the best solution Solution 146013.
Must have 50 solvers for a problem you created.
Earned on 29 Aug 2012 for solving all the problems in Tiles Challenge.
Earned on 10 Jan 2014 for solving all the problems in ASEE Challenge.
Solve all the problems in Cody Challenge problem group.
Create 10 problems.
Solve 500 problems.
Solve all the problems in Modeling and Simulation Challenge problem group.
Solve all the problems in Magic Numbers problem group.
Must receive 25 total likes for the problems you created.
Must receive 50 total likes for the solutions you submitted.
Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.
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