Earned on 5 Jul 2012 for solving Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10].
Earned on 8 Jan 2013 for commenting on Solution 183475.
Earned on 28 Feb 2013 for liking Solution 108804.
Earned on 8 Mar 2013 for creating Problem 1325. Special matrix.
Earned on 8 Mar 2013 for first solving Problem 1325. Special matrix.
Solve all the problems in CUP Challenge problem group.
Earned on 6 Jul 2012 for submitting the best solution Solution 107182.
Earned on 16 Oct 2016 at 18:45 for having 50 or more solvers for Problem 1370. Derivative of polynomial.
Earned on 17 May 2013 for solving all the problems in Tiles Challenge.
Solve all the problems in ASEE Challenge problem group.
Solve all the problems in Cody Challenge problem group.
Create 10 problems.
Earned on 11 Jun 2013 for solving 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.
Choose your country to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a location from the following list:
See all countries