hey i'm 31 and will be 32 by the time i enroll in the fall. it will be my first time in a math class since 2008, though for the past ten years all of my jobs have revolved entirely around math. only 1 phd admitted me but i received a couple acceptances to master's programs. i spoke to several people from admissions committees and despite going to a great school and having solid gre and mgre scores (especially since i graduated ten years ago), i was seen as "high risk" - probably due to the fact that i've been out of school so long, my grades were up and down while was there (ie. A in linear algebra II, but a C in real analysis), 2/3 of my recommenders are from outside mathematics, i already have a master's degree in Architecture and i've never done research. it seems to me that while you're older, you are a more logical, less risky candidate than i was so i think you'll be totally fine. good luck.