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Must have 50 solvers for a problem you created.
Earned on 27 Apr 2013 for creating 10 problems.
Earned on 29 Apr 2013 for solving 500 problems.
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.
Solve all the problems in Modeling and Simulation Challenge problem group.
Must receive 10 likes for a problem you created.