david hansen

Solve all the problems in CUP Challenge

Awarded to david hansen on 08 Apr 2016

Like a problem or solution

Awarded to david hansen on 06 Sep 2013

Comment on a problem or solution

Awarded to david hansen on 06 Sep 2013

Solve a problem for the first time

Awarded to david hansen on 26 Oct 2012

Be the first to solve a problem

Awarded to david hansen on 11 May 2016

Create a problem

Awarded to david hansen on 11 May 2016

Solve all the problems in ASEE Challenge

Awarded to david hansen on 07 Apr 2016

Obtain 50 solvers for a problem you have created

Awarded to david hansen on 06 May 2025