I haven't had any really big challenges in my last job. Usually if something is difficult or hard to do or I think it's going to be a challenge I try to break it down into smaller tasks or try and figure it out in my head before I tackle it just so it's not going to be challenging to me or a problem. Usually I get it done with no problems but no I haven't really had too many big challenges that I can think of. Like I said, I usually break them down and try and make them a little more manageable.