One-time project work for interview

I was paid $700 for working on a project that took about 20 hours as part of a job interview process. Did not recieve any 1099 forms. Do I report this as business income, consider myself as a "business", and if so, on Schedule C, where it asks did you "materially participate" in the operation of this business, do they mean my "business" or the business I did the work for? And would the answer be "no" either way?  To make things less complicated, can I just report this as "Other income" and not business income on Schedule 1?